/// <summary>
/// Returns the DetailLayer values for the given heightfield part.
/// Converts from HF float[] values into int[,] array.
/// </summary>
/// <param name="session">Houdini Engine session to query</param>
/// <param name="geoID">The geometry ID in Houdini</param>
/// <param name="partID">The part ID in Houdini</param>
/// <param name="detailResolution">Out value specifying the detail resolution acquired
/// from the heightfield size.</param>
/// <returns>The DetailLayer values</returns>
public static int[,] GetDetailMapFromPart(HEU_SessionBase session, HAPI_NodeId geoID, HAPI_PartId partID,
out int detailResolution)
{
detailResolution = 0;
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(geoID, partID, ref volumeInfo);
if (!bResult)
{
return null;
}
int volumeXLength = volumeInfo.xLength;
int volumeYLength = volumeInfo.yLength;
// Unity requires square size
if (volumeXLength != volumeYLength)
{
Debug.LogErrorFormat("Detail layer size must be square. Got {0}x{1} instead. Unable to apply detail layer.",
volumeXLength, volumeYLength);
return null;
}
// Use the size of the volume as the detail resolution size
detailResolution = volumeXLength;
// Number of heightfield values
int totalHeightValues = volumeXLength * volumeYLength;
// Get the floating point values from the heightfield
float[] heightValues = new float[totalHeightValues];
bResult = HEU_GeneralUtility.GetArray2Arg(geoID, partID, session.GetHeightFieldData, heightValues, 0, totalHeightValues);
if (!bResult)
{
return null;
}
// Convert float[] to int[,]. No conversion or scaling done since just want to use values as they are.
int[,] intMap = new int[volumeXLength, volumeYLength];
for (int y = 0; y < volumeYLength; ++y)
{
for (int x = 0; x < volumeXLength; ++x)
{
float f = heightValues[x + y * volumeXLength];
// Flip for right-hand to left-handed coordinate system
int ix = x;
int iy = volumeYLength - (y + 1);
intMap[ix, iy] = (int)f;
}
}
return intMap;
}
public void UpdateLayerFromPart(HEU_SessionBase session, HEU_PartData part)
{
HEU_GeoNode geoNode = part.ParentGeoNode;
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(geoNode.GeoID, part.PartID, ref volumeInfo);
if (!bResult || volumeInfo.tupleSize != 1 || volumeInfo.zLength != 1 || volumeInfo.storage != HAPI_StorageType.HAPI_STORAGETYPE_FLOAT)
{
return;
}
string volumeName = HEU_SessionManager.GetString(volumeInfo.nameSH, session);
part.SetVolumeLayerName(volumeName);
//Debug.LogFormat("Part name: {0}, GeoName: {1}, Volume Name: {2}, Display: {3}", part.PartName, geoNode.GeoName, volumeName, geoNode.Displayable);
bool bHeightPart = volumeName.Equals("height");
HEU_VolumeLayer layer = GetLayer(volumeName);
if (layer == null)
{
layer = new HEU_VolumeLayer();
layer._layerName = volumeName;
if (bHeightPart)
{
_layers.Insert(0, layer);
}
else
{
_layers.Add(layer);
}
}
layer._part = part;
GetPartLayerAttributes(session, geoNode.GeoID, part.PartID, layer);
if (!bHeightPart)
{
part.DestroyAllData();
}
if (!_updatedLayers.Contains(layer))
{
if (bHeightPart)
{
_updatedLayers.Insert(0, layer);
}
else
{
_updatedLayers.Add(layer);
}
}
}
/// <summary>
/// Helper to set heightfield data for a specific volume node.
/// Used for a specific terrain layer.
/// </summary>
/// <param name="session">Session that the volume node resides in.</param>
/// <param name="volumeNodeID">ID of the target volume node</param>
/// <param name="partID">Part ID</param>
/// <param name="heightValues">Array of height or alpha values</param>
/// <param name="heightFieldName">Name of the layer</param>
/// <returns>True if successfully uploaded heightfield values</returns>
public bool SetHeightFieldData(HEU_SessionBase session, HAPI_NodeId volumeNodeID, HAPI_PartId partID, float[] heightValues, string heightFieldName, ref HAPI_VolumeInfo baseVolumeInfo)
{
// Cook the node to get infos below
if (!session.CookNode(volumeNodeID, false))
{
return(false);
}
// Get Geo, Part, and Volume infos
HAPI_GeoInfo geoInfo = new HAPI_GeoInfo();
if (!session.GetGeoInfo(volumeNodeID, ref geoInfo))
{
return(false);
}
HAPI_PartInfo partInfo = new HAPI_PartInfo();
if (!session.GetPartInfo(geoInfo.nodeId, partID, ref partInfo))
{
return(false);
}
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
if (!session.GetVolumeInfo(volumeNodeID, partInfo.id, ref volumeInfo))
{
return(false);
}
volumeInfo.tileSize = 1;
// Use same transform as base layer
volumeInfo.transform = baseVolumeInfo.transform;
if (!session.SetVolumeInfo(volumeNodeID, partInfo.id, ref volumeInfo))
{
Debug.LogError("Unable to set volume info on input heightfield node!");
return(false);
}
// Now set the height data
if (!session.SetHeightFieldData(geoInfo.nodeId, partInfo.id, heightFieldName, heightValues, 0, heightValues.Length))
{
Debug.LogErrorFormat("Unable to set `{0}` height values on input heightfield node!\n" +
"Check your terrain sizes including Control Texture Resolution is less than the Heightmap Resolution.",
heightFieldName);
return(false);
}
return(true);
}
private void UpdateVolumeLayers(HEU_SessionBase session, HEU_HoudiniAsset houdiniAsset, List<HEU_PartData> volumeParts)
{
bool bResult;
foreach (HEU_PartData part in volumeParts)
{
HEU_GeoNode geoNode = part.ParentGeoNode;
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bResult = session.GetVolumeInfo(geoNode.GeoID, part.PartID, ref volumeInfo);
if (!bResult || volumeInfo.tupleSize != 1 || volumeInfo.zLength != 1 || volumeInfo.storage != HAPI_StorageType.HAPI_STORAGETYPE_FLOAT)
{
continue;
}
string volumeName = HEU_SessionManager.GetString(volumeInfo.nameSH, session);
part.SetVolumeLayerName(volumeName);
//Debug.LogFormat("Part name: {0}, GeoName: {1}, Volume Name: {2}, Display: {3}", part.PartName, geoNode.GeoName, volumeName, geoNode.Displayable);
bool bHeightPart = volumeName.Equals("height");
HEU_VolumeLayer layer = GetLayer(volumeName);
if (layer == null)
{
layer = new HEU_VolumeLayer();
layer._layerName = volumeName;
layer._splatTexture = LoadDefaultSplatTexture();
if (bHeightPart)
{
_layers.Insert(0, layer);
}
else
{
_layers.Add(layer);
}
}
layer._part = part;
if (!bHeightPart)
{
part.DestroyAllData();
}
}
}
/// <summary>
/// Helper to set heightfield data for a specific volume node.
/// Used for a specific terrain layer.
/// </summary>
/// <param name="session">Session that the volume node resides in.</param>
/// <param name="volumeNodeID">ID of the target volume node</param>
/// <param name="partID">Part ID</param>
/// <param name="heightValues">Array of height or alpha values</param>
/// <param name="heightFieldName">Name of the layer</param>
/// <returns>True if successfully uploaded heightfield values</returns>
public bool SetHeightFieldData(HEU_SessionBase session, HAPI_NodeId volumeNodeID, HAPI_PartId partID, float[] heightValues, string heightFieldName)
{
// Cook the node to get infos below
if (!session.CookNode(volumeNodeID, false))
{
return false;
}
// Get Geo, Part, and Volume infos
HAPI_GeoInfo geoInfo = new HAPI_GeoInfo();
if (!session.GetGeoInfo(volumeNodeID, ref geoInfo))
{
return false;
}
HAPI_PartInfo partInfo = new HAPI_PartInfo();
if (!session.GetPartInfo(geoInfo.nodeId, partID, ref partInfo))
{
return false;
}
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
if (!session.GetVolumeInfo(volumeNodeID, partInfo.id, ref volumeInfo))
{
return false;
}
volumeInfo.tileSize = 1;
if (!session.SetVolumeInfo(volumeNodeID, partInfo.id, ref volumeInfo))
{
Debug.LogError("Unable to set volume info on input heightfield node!");
return false;
}
// Now set the height data
if (!session.SetHeightFieldData(geoInfo.nodeId, partInfo.id, heightFieldName, heightValues, 0, heightValues.Length))
{
Debug.LogError("Unable to set height values on input heightfield node!");
return false;
}
return true;
}
private bool SetMaskLayer(HEU_SessionBase session, HEU_InputDataTerrain idt, ref HAPI_VolumeInfo baseVolumeInfo)
{
int sizeX = idt._terrainData.alphamapWidth;
int sizeY = idt._terrainData.alphamapHeight;
int totalSize = sizeX * sizeY;
float[] maskValues = new float[totalSize];
if (!SetHeightFieldData(session, idt._maskNodeID, 0, maskValues, HEU_Defines.HAPI_HEIGHTFIELD_LAYERNAME_MASK, ref baseVolumeInfo))
{
return(false);
}
if (!session.CommitGeo(idt._maskNodeID))
{
Debug.LogError("Failed to commit volume layer 'mask'");
return(false);
}
return(true);
}
private void ParseVolumeDatas(HEU_SessionBase session, List<HEU_PartData> volumeParts)
{
bool bResult;
foreach (HEU_PartData part in volumeParts)
{
HEU_GeoNode geoNode = part.ParentGeoNode;
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bResult = session.GetVolumeInfo(geoNode.GeoID, part.PartID, ref volumeInfo);
if(!bResult || volumeInfo.tupleSize != 1 || volumeInfo.zLength != 1 || volumeInfo.storage != HAPI_StorageType.HAPI_STORAGETYPE_FLOAT)
{
continue;
}
string volumeName = HEU_SessionManager.GetString(volumeInfo.nameSH, session);
//Debug.LogFormat("Part name: {0}, GeoName: {1}, Volume Name: {2}, Display: {3}", part.PartName, geoNode.GeoName, volumeName, geoNode.Displayable);
if(volumeName.Equals("height"))
{
if (_heightMapVolumeData == null)
{
_heightMapVolumeData = new HEU_VolumeData();
_heightMapVolumeData._partData = part;
_heightMapVolumeData._volumeInfo = volumeInfo;
}
}
else
{
HEU_VolumeData volumeData = new HEU_VolumeData();
volumeData._partData = part;
volumeData._volumeInfo = volumeInfo;
_textureVolumeDatas.Add(volumeData);
}
}
}
/// <summary>
/// Retrieves the heightmap from Houdini for the given volume part, converts to Unity coordinates,
/// normalizes to 0 and 1, along with min and max height values, as well as the range.
/// </summary>
/// <param name="session">Current Houdini session</param>
/// <param name="geoID">Geometry object ID</param>
/// <param name="partID">The volume part ID</param>
/// <param name="heightMapSize">Size of each dimension of the heightmap (assumes equal sides).</param>
/// <param name="minHeight">Found minimum height value in the heightmap.</param>
/// <param name="maxHeight">Found maximum height value in the heightmap.</param>
/// <param name="heightRange">Found height range in the heightmap.</param>
/// <returns>The converted heightmap from Houdini.</returns>
public static float[] GetNormalizedHeightmapFromPartWithMinMax(HEU_SessionBase session, HAPI_NodeId geoID, HAPI_PartId partID,
int heightMapWidth, int heightMapHeight, ref float minHeight, ref float maxHeight, ref float heightRange, bool bUseHeightRangeOverride)
{
minHeight = float.MaxValue;
maxHeight = float.MinValue;
heightRange = 1;
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(geoID, partID, ref volumeInfo);
if (!bResult)
{
return null;
}
int volumeXLength = volumeInfo.xLength;
int volumeYLength = volumeInfo.yLength;
// Number of heightfield values
int totalHeightValues = volumeXLength * volumeYLength;
float[] heightValues = new float[totalHeightValues];
if (!GetHeightmapFromPart(session, volumeXLength, volumeYLength, geoID, partID, ref heightValues, ref minHeight, ref maxHeight))
{
return null;
}
heightRange = (maxHeight - minHeight);
// Use the override height range if user has set via attribute
bool bHeightRangeOverriden = false;
if (bUseHeightRangeOverride)
{
float userHeightRange = GetHeightRangeFromHeightfield(session, geoID, partID);
if (userHeightRange > 0)
{
heightRange = userHeightRange;
bHeightRangeOverriden = true;
}
}
if (heightRange == 0f)
{
// Always use a non-zero height range, otherwise user can't paint height on Terrain.
heightRange = 1f;
}
//Debug.LogFormat("{0} : {1}", HEU_SessionManager.GetString(volumeInfo.nameSH, session), heightRange);
const int UNITY_MAX_HEIGHT_RANGE = 65536;
if (Mathf.RoundToInt(heightRange) > UNITY_MAX_HEIGHT_RANGE)
{
Debug.LogWarningFormat("Unity Terrain has maximum height range of {0}. This HDA height range is {1}, so it will be maxed out at {0}.\nPlease resize to within valid range!",
UNITY_MAX_HEIGHT_RANGE, Mathf.RoundToInt(heightRange));
heightRange = UNITY_MAX_HEIGHT_RANGE;
}
// Remap height values to fit terrain size
int paddingWidth = heightMapWidth - volumeXLength;
int paddingLeft = Mathf.CeilToInt(paddingWidth * 0.5f);
int paddingRight = heightMapWidth - paddingLeft;
//Debug.LogFormat("Padding: Width={0}, Left={1}, Right={2}", paddingWidth, paddingLeft, paddingRight);
int paddingHeight = heightMapHeight - volumeYLength;
int paddingTop = Mathf.CeilToInt(paddingHeight * 0.5f);
int paddingBottom = heightMapHeight - paddingTop;
//Debug.LogFormat("Padding: Height={0}, Top={1}, Bottom={2}", paddingHeight, paddingTop, paddingBottom);
// Normalize the height values into the range between 0 and 1, inclusive.
float inverseHeightRange = 1f / heightRange;
float normalizeMinHeight = minHeight;
if (minHeight >= 0f && minHeight <= 1f && maxHeight >= 0f && maxHeight <= 1f)
{
// Its important to leave the values alone if they are already normalized.
// So these values don't actually do anything in the normalization calculation below.
inverseHeightRange = 1f;
normalizeMinHeight = 0f;
}
// Set height values at centre of the terrain, with padding on the sides if we resized
float[] resizedHeightValues = new float[heightMapWidth * heightMapHeight];
for (int y = 0; y < heightMapHeight; ++y)
{
for (int x = 0; x < heightMapWidth; ++x)
{
if (y >= paddingTop && y < (paddingBottom) && x >= paddingLeft && x < (paddingRight))
{
int ay = x - paddingLeft;
int ax = y - paddingTop;
float f = heightValues[ay + ax * volumeXLength];
if (!bHeightRangeOverriden)
{
f -= normalizeMinHeight;
}
f *= inverseHeightRange;
// Flip for right-hand to left-handed coordinate system
int ix = x;
int iy = heightMapHeight - (y + 1);
// Unity expects height array indexing to be [y, x].
resizedHeightValues[iy + ix * heightMapWidth] = f;
}
}
}
return resizedHeightValues;
}
/// <summary>
/// Upload the base height layer into heightfield network.
/// </summary>
/// <param name="session"></param>
/// <param name="idt"></param>
/// <returns></returns>
public bool UploadHeightValuesWithTransform(HEU_SessionBase session, HEU_InputDataTerrain idt)
{
// Get Geo, Part, and Volume infos
HAPI_GeoInfo geoInfo = new HAPI_GeoInfo();
if (!session.GetGeoInfo(idt._heightNodeID, ref geoInfo))
{
Debug.LogError("Unable to get geo info from heightfield node!");
return false;
}
HAPI_PartInfo partInfo = new HAPI_PartInfo();
if (!session.GetPartInfo(geoInfo.nodeId, 0, ref partInfo))
{
Debug.LogError("Unable to get part info from heightfield node!");
return false;
}
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
if (!session.GetVolumeInfo(idt._heightNodeID, 0, ref volumeInfo))
{
Debug.LogError("Unable to get volume info from heightfield node!");
return false;
}
if (volumeInfo.xLength != Mathf.RoundToInt(idt._numPointsX / idt._voxelSize)
|| volumeInfo.yLength != Mathf.RoundToInt(idt._numPointsY / idt._voxelSize)
|| idt._terrainData.heightmapResolution != volumeInfo.xLength
|| idt._terrainData.heightmapResolution != volumeInfo.yLength)
{
Debug.LogError("Created heightfield in Houdini differs in voxel size from input terrain!");
return false;
}
// Update volume infos, and set it. This is required.
volumeInfo.tileSize = 1;
volumeInfo.type = HAPI_VolumeType.HAPI_VOLUMETYPE_HOUDINI;
volumeInfo.storage = HAPI_StorageType.HAPI_STORAGETYPE_FLOAT;
volumeInfo.transform = idt._transform;
volumeInfo.minX = 0;
volumeInfo.minY = 0;
volumeInfo.minZ = 0;
volumeInfo.tupleSize = 1;
volumeInfo.tileSize = 1;
volumeInfo.hasTaper = false;
volumeInfo.xTaper = 0f;
volumeInfo.yTaper = 0f;
if (!session.SetVolumeInfo(idt._heightNodeID, partInfo.id, ref volumeInfo))
{
Debug.LogError("Unable to set volume info on input heightfield node!");
return false;
}
// Now set the height data
float[,] heights = idt._terrainData.GetHeights(0, 0, volumeInfo.xLength, volumeInfo.yLength);
int sizeX = heights.GetLength(0);
int sizeY = heights.GetLength(1);
int totalSize = sizeX * sizeY;
// Convert to single array
float[] heightsArr = new float[totalSize];
for (int j = 0; j < sizeY; j++)
{
for (int i = 0; i < sizeX; i++)
{
// Flip for coordinate system change
float h = heights[i, (sizeY - j - 1)];
heightsArr[i + j * sizeX] = h * idt._heightScale;
}
}
// Set the base height layer
if (!session.SetHeightFieldData(idt._heightNodeID, 0, "height", heightsArr, 0, totalSize))
{
Debug.LogError("Unable to set height values on input heightfield node!");
return false;
}
if (!session.CommitGeo(idt._heightNodeID))
{
Debug.LogError("Unable to commit geo on input heightfield node!");
return false;
}
return true;
}
/// <summary>
/// Upload the base height layer into heightfield network.
/// </summary>
/// <param name="session"></param>
/// <param name="idt"></param>
/// <returns></returns>
public bool UploadHeightValuesWithTransform(HEU_SessionBase session, HEU_InputDataTerrain idt, ref HAPI_VolumeInfo volumeInfo)
{
// Get Geo, Part, and Volume infos
HAPI_GeoInfo geoInfo = new HAPI_GeoInfo();
if (!session.GetGeoInfo(idt._heightNodeID, ref geoInfo))
{
HEU_Logger.LogError("Unable to get geo info from heightfield node!");
return(false);
}
HAPI_PartInfo partInfo = new HAPI_PartInfo();
if (!session.GetPartInfo(geoInfo.nodeId, 0, ref partInfo))
{
HEU_Logger.LogError("Unable to get part info from heightfield node!");
return(false);
}
volumeInfo = new HAPI_VolumeInfo();
if (!session.GetVolumeInfo(idt._heightNodeID, 0, ref volumeInfo))
{
HEU_Logger.LogError("Unable to get volume info from heightfield node!");
return(false);
}
if ((volumeInfo.xLength - 1) != Mathf.RoundToInt(idt._numPointsX / idt._voxelSize) ||
(volumeInfo.yLength - 1) != Mathf.RoundToInt(idt._numPointsY / idt._voxelSize) ||
idt._terrainData.heightmapResolution != volumeInfo.xLength ||
idt._terrainData.heightmapResolution != volumeInfo.yLength)
{
HEU_Logger.LogWarning("Created heightfield in Houdini differs in voxel size from input terrain! Terrain may require resampling.");
}
// Update volume infos, and set it. This is required.
volumeInfo.tileSize = 1;
volumeInfo.type = HAPI_VolumeType.HAPI_VOLUMETYPE_HOUDINI;
volumeInfo.storage = HAPI_StorageType.HAPI_STORAGETYPE_FLOAT;
volumeInfo.transform = idt._transform;
volumeInfo.minX = 0;
volumeInfo.minY = 0;
volumeInfo.minZ = 0;
volumeInfo.tupleSize = 1;
volumeInfo.tileSize = 1;
volumeInfo.hasTaper = false;
volumeInfo.xTaper = 0f;
volumeInfo.yTaper = 0f;
if (!session.SetVolumeInfo(idt._heightNodeID, partInfo.id, ref volumeInfo))
{
HEU_Logger.LogError("Unable to set volume info on input heightfield node!");
return(false);
}
// Now set the height data
float[,] heights = idt._terrainData.GetHeights(0, 0, idt._terrainData.heightmapResolution, idt._terrainData.heightmapResolution);
int sizeX = heights.GetLength(0);
int sizeY = heights.GetLength(1);
int totalSize = sizeX * sizeY;
// Convert to single array
float[] heightsArr = new float[totalSize];
for (int j = 0; j < sizeY; j++)
{
for (int i = 0; i < sizeX; i++)
{
// Flip for coordinate system change
float h = heights[i, (sizeY - j - 1)];
heightsArr[i + j * sizeX] = h * idt._heightScale;
}
}
if (volumeInfo.xLength != volumeInfo.yLength)
{
HEU_Logger.LogError("Error: Houdini heightmap must be square!");
return(false);
}
if (idt._terrainData.heightmapResolution != volumeInfo.xLength)
{
// Resize heightsArr to idt._terrainData.heightmapResolution
HEU_Logger.LogWarningFormat("Attempting to resize landscape from ({0}x{1}) to ({2}x{3})", idt._terrainData.heightmapResolution, idt._terrainData.heightmapResolution, volumeInfo.xLength, volumeInfo.xLength);
heightsArr = HEU_TerrainUtility.ResampleData(heightsArr, idt._terrainData.heightmapResolution, idt._terrainData.heightmapResolution, volumeInfo.xLength, volumeInfo.xLength);
sizeX = volumeInfo.xLength;
sizeY = volumeInfo.yLength;
totalSize = sizeX * sizeY;
}
// Set the base height layer
if (!session.SetHeightFieldData(idt._heightNodeID, 0, HEU_Defines.HAPI_HEIGHTFIELD_LAYERNAME_HEIGHT, heightsArr, 0, totalSize))
{
HEU_Logger.LogError("Unable to set height values on input heightfield node!");
return(false);
}
SetTerrainDataAttributesToHeightField(session, geoInfo.nodeId, 0, idt._terrainData);
SetTreePrototypes(session, geoInfo.nodeId, 0, idt._terrainData);
if (!session.CommitGeo(idt._heightNodeID))
{
HEU_Logger.LogError("Unable to commit geo on input heightfield node!");
return(false);
}
return(true);
}
public static bool GenerateTerrainFromVolume(HEU_SessionBase session, ref HAPI_VolumeInfo volumeInfo, HAPI_NodeId geoID, HAPI_PartId partID,
GameObject gameObject, out TerrainData terrainData, out Vector3 volumePositionOffset)
{
terrainData = null;
volumePositionOffset = Vector3.zero;
if (volumeInfo.zLength == 1 && volumeInfo.tupleSize == 1)
{
// Heightfields will be converted to terrain in Unity.
// Unity requires terrainData.heightmapResolution to be square power of two plus 1 (eg. 513, 257, 129, 65).
// Houdini gives volumeInfo.xLength and volumeInfo.yLength which are the number of height values per dimension.
// Note that volumeInfo.xLength and volumeInfo.yLength is equal to Houdini heightfield size / grid spacing.
// The heightfield grid spacing is given as volumeTransformMatrix.scale but divided by 2 (grid spacing / 2 = volumeTransformMatrix.scale).
// It is recommended to use grid spacing of 2.
// Use the volumeInfo.transform to get the actual heightfield position and size.
Matrix4x4 volumeTransformMatrix = HEU_HAPIUtility.GetMatrixFromHAPITransform(ref volumeInfo.transform, false);
Vector3 position = HEU_HAPIUtility.GetPosition(ref volumeTransformMatrix);
Vector3 scale = HEU_HAPIUtility.GetScale(ref volumeTransformMatrix);
// Calculate real terrain size in both Houdini and Unity.
// The height values will be mapped over this terrain size.
float gridSpacingX = scale.x * 2f;
float gridSpacingY = scale.y * 2f;
float terrainSizeX = Mathf.Round((volumeInfo.xLength - 1) * gridSpacingX);
float terrainSizeY = Mathf.Round((volumeInfo.yLength - 1) * gridSpacingY);
//Debug.LogFormat("GS = {0},{1},{2}. SX = {1}. SY = {2}", gridSpacingX, gridSpacingY, terrainSizeX, terrainSizeY);
//Debug.LogFormat("HeightField Pos:{0}, Scale:{1}", position, scale.ToString("{0.00}"));
//Debug.LogFormat("HeightField tileSize:{0}, xLength:{1}, yLength:{2}", volumeInfo.tileSize.ToString("{0.00}"), volumeInfo.xLength.ToString("{0.00}"), volumeInfo.yLength.ToString("{0.00}"));
//Debug.LogFormat("HeightField Terrain Size x:{0}, y:{1}", terrainSizeX.ToString("{0.00}"), terrainSizeY.ToString("{0.00}"));
//Debug.LogFormat("HeightField minX={0}, minY={1}, minZ={2}", volumeInfo.minX.ToString("{0.00}"), volumeInfo.minY.ToString("{0.00}"), volumeInfo.minZ.ToString("{0.00}"));
const int UNITY_MINIMUM_HEIGHTMAP_RESOLUTION = 33;
if (terrainSizeX < UNITY_MINIMUM_HEIGHTMAP_RESOLUTION || terrainSizeY < UNITY_MINIMUM_HEIGHTMAP_RESOLUTION)
{
Debug.LogWarningFormat("Unity Terrain has a minimum heightmap resolution of {0}. This HDA heightmap size is {1}x{2}."
+ "\nPlease resize the terrain to a value higher than this.",
UNITY_MINIMUM_HEIGHTMAP_RESOLUTION, terrainSizeX, terrainSizeY);
return false;
}
Terrain terrain = HEU_GeneralUtility.GetOrCreateComponent<Terrain>(gameObject);
TerrainCollider collider = HEU_GeneralUtility.GetOrCreateComponent<TerrainCollider>(gameObject);
if (terrain.terrainData == null)
{
terrain.terrainData = new TerrainData();
}
terrainData = terrain.terrainData;
collider.terrainData = terrainData;
// Heightmap resolution must be square power-of-two plus 1.
// Unity will automatically resize terrainData.heightmapResolution so need to handle the changed size (if Unity changed it).
int heightMapResolution = volumeInfo.xLength;
terrainData.heightmapResolution = heightMapResolution;
int terrainResizedDelta = terrainData.heightmapResolution - heightMapResolution;
if (terrainResizedDelta < 0)
{
Debug.LogWarningFormat("Note that Unity automatically resized terrain resolution to {0} from {1}. Use terrain size of power of two plus 1, and grid spacing of 2.", heightMapResolution, terrainData.heightmapResolution);
heightMapResolution = terrainData.heightmapResolution;
}
else if(terrainResizedDelta > 0)
{
Debug.LogErrorFormat("Unsupported terrain size. Use terrain size of power of two plus 1, and grid spacing of 2. (delta = {0})", terrainResizedDelta);
return false;
}
// Get the height values from Houdini and find the min and max height range.
float minHeight = 0;
float maxHeight = 0;
float[] heightValues = null;
if (!GetHeightfieldValues(session, volumeInfo.xLength, volumeInfo.yLength, geoID, partID, ref heightValues, ref minHeight, ref maxHeight))
{
return false;
}
const int UNITY_MAX_HEIGHT_RANGE = 65536;
float heightRange = (maxHeight - minHeight);
if (Mathf.RoundToInt(heightRange) > UNITY_MAX_HEIGHT_RANGE)
{
Debug.LogWarningFormat("Unity Terrain has maximum height range of {0}. This HDA height range is {1}, so it will be maxed out at {0}.\nPlease resize to within valid range!",
UNITY_MAX_HEIGHT_RANGE, Mathf.RoundToInt(heightRange));
heightRange = UNITY_MAX_HEIGHT_RANGE;
}
int mapWidth = volumeInfo.xLength;
int mapHeight = volumeInfo.yLength;
int paddingWidth = heightMapResolution - mapWidth;
int paddingLeft = Mathf.CeilToInt(paddingWidth * 0.5f);
int paddingRight = heightMapResolution - paddingLeft;
//Debug.LogFormat("Padding: Width={0}, Left={1}, Right={2}", paddingWidth, paddingLeft, paddingRight);
int paddingHeight = heightMapResolution - mapHeight;
int paddingTop = Mathf.CeilToInt(paddingHeight * 0.5f);
int paddingBottom = heightMapResolution - paddingTop;
//Debug.LogFormat("Padding: Height={0}, Top={1}, Bottom={2}", paddingHeight, paddingTop, paddingBottom);
// Set height values at centre of the terrain, with padding on the sides if we resized
float[,] unityHeights = new float[heightMapResolution, heightMapResolution];
for (int y = 0; y < heightMapResolution; ++y)
{
for (int x = 0; x < heightMapResolution; ++x)
{
if (y >= paddingTop && y < (paddingBottom) && x >= paddingLeft && x < (paddingRight))
{
int ay = x - paddingLeft;
int ax = y - paddingTop;
// Unity expects normalized height values
float h = heightValues[ay + ax * mapWidth] - minHeight;
float f = h / heightRange;
// Flip for right-hand to left-handed coordinate system
int ix = x;
int iy = heightMapResolution - (y + 1);
// Unity expects height array indexing to be [y, x].
unityHeights[ix, iy] = f;
}
}
}
terrainData.baseMapResolution = heightMapResolution;
terrainData.alphamapResolution = heightMapResolution;
//int detailResolution = heightMapResolution;
// 128 is the maximum for resolutionPerPatch
const int resolutionPerPatch = 128;
terrainData.SetDetailResolution(resolutionPerPatch, resolutionPerPatch);
// Note SetHeights must be called before setting size in next line, as otherwise
// the internal terrain size will not change after setting the size.
terrainData.SetHeights(0, 0, unityHeights);
terrainData.size = new Vector3(terrainSizeX, heightRange, terrainSizeY);
terrain.Flush();
// Unity Terrain has origin at bottom left, whereas Houdini uses centre of terrain.
// Use volume bounds to set position offset when using split tiles
float xmin, xmax, zmin, zmax, ymin, ymax, xcenter, ycenter, zcenter;
session.GetVolumeBounds(geoID, partID, out xmin, out ymin, out zmin, out xmax, out ymax, out zmax, out xcenter,
out ycenter, out zcenter);
//Debug.LogFormat("xmin: {0}, xmax: {1}, ymin: {2}, ymax: {3}, zmin: {4}, zmax: {5}, xc: {6}, yc: {7}, zc: {8}",
// xmin, xmax, ymin, ymax, zmin, zmax, xcenter, ycenter, zcenter);
// Offset position is based on size of heightfield
float offsetX = (float)heightMapResolution / (float)mapWidth;
float offsetZ = (float)heightMapResolution / (float)mapHeight;
//Debug.LogFormat("offsetX: {0}, offsetZ: {1}", offsetX, offsetZ);
//Debug.LogFormat("position.x: {0}, position.z: {1}", position.x, position.z);
//volumePositionOffset = new Vector3(-position.x * offsetX, minHeight + position.y, position.z * offsetZ);
volumePositionOffset = new Vector3((terrainSizeX + xmin) * offsetX, minHeight + position.y, zmin * offsetZ);
return true;
}
else
{
Debug.LogWarning("Non-heightfield volume type not supported!");
}
return false;
}
public void GenerateTerrainWithAlphamaps(HEU_SessionBase session, HEU_HoudiniAsset houdiniAsset, bool bRebuild)
{
if(_layers == null || _layers.Count == 0)
{
Debug.LogError("Unable to generate terrain due to lack of heightfield layers!");
return;
}
HEU_VolumeLayer heightLayer = _layers[0];
HAPI_VolumeInfo heightVolumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(_ownerNode.GeoID, heightLayer._part.PartID, ref heightVolumeInfo);
if (!bResult)
{
Debug.LogErrorFormat("Unable to get volume info for height layer: {0}!", heightLayer._layerName);
return;
}
// Special handling of volume cache presets. It is applied here (if exists) because it might pertain to TerrainData that exists
// in the AssetDatabase. If we don't apply here but rather create a new one, the existing file will get overwritten.
// Applying the preset here for terrain ensures the TerrainData is reused.
// Get the volume preset for this part
HEU_VolumeCachePreset volumeCachePreset = houdiniAsset.GetVolumeCachePreset(_ownerNode.ObjectNode.ObjectName, _ownerNode.GeoName, TileIndex);
if (volumeCachePreset != null)
{
ApplyPreset(volumeCachePreset);
// Remove it so that it doesn't get applied when doing the recook step
houdiniAsset.RemoveVolumeCachePreset(volumeCachePreset);
}
// The TerrainData and TerrainLayer files needs to be saved out if we create them. This creates the relative folder
// path from the Asset's cache folder: {assetCache}/{geo name}/Terrain/Tile{tileIndex}/...
string relativeFolderPath = HEU_Platform.BuildPath(_ownerNode.GeoName, HEU_Defines.HEU_FOLDER_TERRAIN, HEU_Defines.HEU_FOLDER_TILE + TileIndex);
if (bRebuild)
{
// For full rebuild, re-create the TerrainData instead of using previous
_terrainData = null;
}
//Debug.Log("Generating Terrain with AlphaMaps: " + (_terrainData != null ? _terrainData.name : "NONE"));
TerrainData terrainData = _terrainData;
Vector3 terrainOffsetPosition = Vector3.zero;
// Look up TerrainData file via attribute if user has set it
string terrainDataFile = HEU_GeneralUtility.GetAttributeStringValueSingle(session, _ownerNode.GeoID, heightLayer._part.PartID,
HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TERRAINDATA_FILE_ATTR, HAPI_AttributeOwner.HAPI_ATTROWNER_PRIM);
if (!string.IsNullOrEmpty(terrainDataFile))
{
TerrainData loadedTerrainData = HEU_AssetDatabase.LoadAssetAtPath(terrainDataFile, typeof(TerrainData)) as TerrainData;
if (loadedTerrainData == null)
{
Debug.LogWarningFormat("TerrainData, set via attribute, not found at: {0}", terrainDataFile);
}
else
{
// In the case that the specified TerrainData belongs to another Terrain (i.e. input Terrain),
// make a copy of it and store it in our cache. Note that this overwrites existing TerrainData in our cache
// because the workflow is such that attributes will always override local setting.
string bakedTerrainPath = houdiniAsset.GetValidAssetCacheFolderPath();
bakedTerrainPath = HEU_Platform.BuildPath(bakedTerrainPath, relativeFolderPath);
terrainData = HEU_AssetDatabase.CopyAndLoadAssetAtAnyPath(loadedTerrainData, bakedTerrainPath, typeof(TerrainData), true) as TerrainData;
if (terrainData == null)
{
Debug.LogErrorFormat("Unable to copy TerrainData from {0} for generating Terrain.", terrainDataFile);
}
}
}
// Generate the terrain and terrain data from the height layer. This applies height values.
bResult = HEU_TerrainUtility.GenerateTerrainFromVolume(session, ref heightVolumeInfo, heightLayer._part.ParentGeoNode.GeoID,
heightLayer._part.PartID, heightLayer._part.OutputGameObject, ref terrainData, out terrainOffsetPosition);
if (!bResult || terrainData == null)
{
return;
}
if (_terrainData != terrainData)
{
_terrainData = terrainData;
heightLayer._part.SetTerrainData(terrainData, relativeFolderPath);
}
heightLayer._part.SetTerrainOffsetPosition(terrainOffsetPosition);
int terrainSize = terrainData.heightmapResolution;
// Now process TerrainLayers and alpha maps
// First, preprocess all layers to get heightfield arrays, converted to proper size
List<float[]> heightFields = new List<float[]>();
// Corresponding list of HF volume layers to process as splatmaps
List<HEU_VolumeLayer> volumeLayersToProcess = new List<HEU_VolumeLayer>();
int numLayers = _layers.Count;
float minHeight = 0;
float maxHeight = 0;
float heightRange = 0;
// This skips the height layer, and processes all other layers.
// Note that mask shouldn't be part of _layers at this point.
for(int i = 1; i < numLayers; ++i)
{
float[] normalizedHF = HEU_TerrainUtility.GetNormalizedHeightmapFromPartWithMinMax(session, _ownerNode.GeoID, _layers[i]._part.PartID,
_layers[i]._xLength, _layers[i]._yLength, ref minHeight, ref maxHeight, ref heightRange);
if (normalizedHF != null && normalizedHF.Length > 0)
{
heightFields.Add(normalizedHF);
volumeLayersToProcess.Add(_layers[i]);
}
}
int numVolumeLayers = volumeLayersToProcess.Count;
HAPI_NodeId geoID;
HAPI_PartId partID;
Texture2D defaultTexture = LoadDefaultSplatTexture();
#if UNITY_2018_3_OR_NEWER
// Create or update the terrain layers based on heightfield layers.
// Keep existing TerrainLayers, and either update or append to them
TerrainLayer[] existingTerrainLayers = terrainData.terrainLayers;
// Total layers are existing layers + new alpha maps
List<TerrainLayer> finalTerrainLayers = new List<TerrainLayer>(existingTerrainLayers);
// This holds the alpha map indices for each layer that will be added to the TerrainData.
// The alpha maps could be a mix of existing and new values, so need to know which to use
// Initially set to use existing alpha maps, then override later on if specified via HF layers
List<int> alphaMapIndices = new List<int>();
for (int a = 0; a < existingTerrainLayers.Length; ++a)
{
// Negative indices for existing alpha map (offset by -1)
alphaMapIndices.Add(-a - 1);
}
bool bNewTerrainLayer = false;
HEU_VolumeLayer layer = null;
TerrainLayer terrainLayer = null;
bool bSetTerrainLayerProperties = true;
for (int m = 0; m < numVolumeLayers; ++m)
{
bNewTerrainLayer = false;
bSetTerrainLayerProperties = true;
layer = volumeLayersToProcess[m];
geoID = _ownerNode.GeoID;
partID = layer._part.PartID;
terrainLayer = null;
int terrainLayerIndex = -1;
// The TerrainLayer attribute overrides existing TerrainLayer. So if its set, load and use it.
string terrainLayerFile = HEU_GeneralUtility.GetAttributeStringValueSingle(session, geoID, partID,
HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TERRAINLAYER_FILE_ATTR, HAPI_AttributeOwner.HAPI_ATTROWNER_PRIM);
if (!string.IsNullOrEmpty(terrainLayerFile))
{
terrainLayer = HEU_AssetDatabase.LoadAssetAtPath(terrainLayerFile, typeof(TerrainLayer)) as TerrainLayer;
if (terrainLayer == null)
{
Debug.LogWarningFormat("TerrainLayer, set via attribute, not found at: {0}", terrainLayerFile);
// Not earlying out or skipping this layer due to error because we want to keep proper indexing
// by creating a new TerrainLayer.
}
else
{
// TerrainLayer loaded from attribute.
// It could be an existing TerrainLayer that is already part of finalTerrainLayers
// or could be a new one which needs to be added.
// If its a different TerrainLayer than existing, update the finalTerrainLayers, and index.
if (layer._terrainLayer != null && layer._terrainLayer != terrainLayer)
{
terrainLayerIndex = HEU_TerrainUtility.GetTerrainLayerIndex(layer._terrainLayer, existingTerrainLayers);
if (terrainLayerIndex >= 0)
{
finalTerrainLayers[terrainLayerIndex] = terrainLayer;
}
}
if (terrainLayerIndex == -1)
{
// Always check if its part of existing list so as not to add it again
terrainLayerIndex = HEU_TerrainUtility.GetTerrainLayerIndex(terrainLayer, existingTerrainLayers);
}
}
}
// No terrain layer specified, so try using existing if we have it
if (terrainLayer == null)
{
terrainLayerIndex = HEU_TerrainUtility.GetTerrainLayerIndex(layer._terrainLayer, existingTerrainLayers);
if (terrainLayerIndex >= 0)
{
// Note the terrainLayerIndex is same for finalTerrainLayers as existingTerrainLayers
terrainLayer = existingTerrainLayers[terrainLayerIndex];
}
}
// Still not found, so just create a new one
if (terrainLayer == null)
{
terrainLayer = new TerrainLayer();
terrainLayer.name = layer._layerName;
//Debug.LogFormat("Created new TerrainLayer with name: {0} ", terrainLayer.name);
bNewTerrainLayer = true;
}
if (terrainLayerIndex == -1)
{
// Adding to the finalTerrainLayers if this is indeed a newly created or loaded TerrainLayer
// (i.e. isn't already part of the TerrainLayers for this Terrain).
// Save this layer's index for later on if we make a copy.
terrainLayerIndex = finalTerrainLayers.Count;
finalTerrainLayers.Add(terrainLayer);
// Positive index for alpha map from heightfield (starting at 1)
alphaMapIndices.Add(m + 1);
}
else
{
// Positive index for alpha map from heightfield (starting at 1)
alphaMapIndices[terrainLayerIndex] = m + 1;
}
// For existing TerrainLayer, make a copy of it if it has custom layer attributes
// because we don't want to change the original TerrainLayer.
if (!bNewTerrainLayer && layer._hasLayerAttributes)
{
string bakedTerrainPath = houdiniAsset.GetValidAssetCacheFolderPath();
bakedTerrainPath = HEU_Platform.BuildPath(bakedTerrainPath, relativeFolderPath);
TerrainLayer prevTerrainLayer = terrainLayer;
terrainLayer = HEU_AssetDatabase.CopyAndLoadAssetAtAnyPath(terrainLayer, bakedTerrainPath, typeof(TerrainLayer), true) as TerrainLayer;
if (terrainLayer != null)
{
// Update the TerrainLayer reference in the list with this copy
finalTerrainLayers[terrainLayerIndex] = terrainLayer;
}
else
{
Debug.LogErrorFormat("Unable to copy TerrainLayer '{0}' for generating Terrain. "
+ "Using original TerrainLayer. Will not be able to set any TerrainLayer properties.", layer._layerName);
terrainLayer = prevTerrainLayer;
bSetTerrainLayerProperties = false;
// Again, continuing on to keep proper indexing.
}
}
// Now override layer properties if they have been set via attributes
if (bSetTerrainLayerProperties)
{
LoadLayerPropertiesFromAttributes(session, geoID, partID, terrainLayer, bNewTerrainLayer, defaultTexture);
}
if (bNewTerrainLayer)
{
// In order to retain the new TerrainLayer, it must be saved to the AssetDatabase.
Object savedObject = null;
string layerFileNameWithExt = terrainLayer.name;
if (!layerFileNameWithExt.EndsWith(HEU_Defines.HEU_EXT_TERRAINLAYER))
{
layerFileNameWithExt += HEU_Defines.HEU_EXT_TERRAINLAYER;
}
houdiniAsset.AddToAssetDBCache(layerFileNameWithExt, terrainLayer, relativeFolderPath, ref savedObject);
}
// Store reference
layer._terrainLayer = terrainLayer;
}
// Get existing alpha maps so we can reuse the values if needed
float[,,] existingAlphaMaps = terrainData.GetAlphamaps(0, 0, terrainData.alphamapWidth, terrainData.alphamapHeight);
terrainData.terrainLayers = finalTerrainLayers.ToArray();
int numTotalAlphaMaps = finalTerrainLayers.Count;
#else
// Create or update the SplatPrototype based on heightfield layers.
// Need to create or reuse SplatPrototype for each layer in heightfield, representing the textures.
SplatPrototype[] existingSplats = terrainData.splatPrototypes;
// A full rebuild clears out existing splats, but a regular cook keeps them.
List<SplatPrototype> finalSplats = new List<SplatPrototype>(existingSplats);
// This holds the alpha map indices for each layer that will be added to the TerrainData
// The alpha maps could be a mix of existing and new values, so need to know which to use
List<int> alphaMapIndices = new List<int>();
// Initially set to use existing alpha maps, then override later on if specified via HF layers.
for (int a = 0; a < existingSplats.Length; ++a)
{
// Negative indices for existing alpha map (offset by -1)
alphaMapIndices.Add(-a - 1);
}
bool bNewSplat = false;
HEU_VolumeLayer layer = null;
SplatPrototype splatPrototype = null;
for (int m = 0; m < numVolumeLayers; ++m)
{
bNewSplat = false;
layer = volumeLayersToProcess[m];
geoID = _ownerNode.GeoID;
partID = layer._part.PartID;
// Try to find existing SplatPrototype for reuse. But not for full rebuild.
splatPrototype = null;
if (layer._splatPrototypeIndex >= 0 && layer._splatPrototypeIndex < existingSplats.Length)
{
splatPrototype = existingSplats[layer._splatPrototypeIndex];
// Positive index for alpha map from heightfield (starting at 1)
alphaMapIndices[layer._splatPrototypeIndex] = m + 1;
}
if (splatPrototype == null)
{
splatPrototype = new SplatPrototype();
layer._splatPrototypeIndex = finalSplats.Count;
finalSplats.Add(splatPrototype);
// Positive index for alpha map from heightfield (starting at 1)
alphaMapIndices.Add(m + 1);
}
// Now override splat properties if they have been set via attributes
LoadLayerPropertiesFromAttributes(session, geoID, partID, splatPrototype, bNewSplat, defaultTexture);
}
// On regular cook, get existing alpha maps so we can reuse the values if needed.
float[,,] existingAlphaMaps = terrainData.GetAlphamaps(0, 0, terrainData.alphamapWidth, terrainData.alphamapHeight);
terrainData.splatPrototypes = finalSplats.ToArray();
int numTotalAlphaMaps = finalSplats.Count;
#endif
// Set alpha maps by combining with existing alpha maps, and appending new heightfields
float[,,] alphamap = null;
if (numTotalAlphaMaps > 0 && volumeLayersToProcess.Count > 0)
{
// Convert the heightfields into alpha maps with layer strengths
float[] strengths = new float[volumeLayersToProcess.Count];
for (int m = 0; m < volumeLayersToProcess.Count; ++m)
{
strengths[m] = volumeLayersToProcess[m]._strength;
}
alphamap = HEU_TerrainUtility.AppendConvertedHeightFieldToAlphaMap(
volumeLayersToProcess[0]._xLength, volumeLayersToProcess[0]._yLength, existingAlphaMaps,
heightFields, strengths, alphaMapIndices);
// Update the alphamap resolution to the actual size of the first
// heightfield layer used for the alphamaps.
// Setting the size before setting the alphamas applies proper scaling.
int alphamapResolution = volumeLayersToProcess[0]._xLength;
terrainData.alphamapResolution = alphamapResolution;
terrainData.SetAlphamaps(0, 0, alphamap);
}
// Tree instances for scattering
HEU_TerrainUtility.ApplyScatter(terrainData, _scatterTrees);
// If the layers were writen out, this saves the asset DB. Otherwise user has to save it themselves.
// Not 100% sure this is needed, but without this the editor doesn't know the terrain asset has been updated
// and therefore doesn't import and show the terrain layer.
HEU_AssetDatabase.SaveAssetDatabase();
}
public bool GenerateTerrainBuffers(HEU_SessionBase session, HAPI_NodeId nodeID, List<HAPI_PartInfo> volumeParts,
List<HAPI_PartInfo> scatterInstancerParts, out List<HEU_LoadBufferVolume> volumeBuffers)
{
volumeBuffers = null;
if (volumeParts.Count == 0)
{
return true;
}
volumeBuffers = new List<HEU_LoadBufferVolume>();
int numParts = volumeParts.Count;
for (int i = 0; i < numParts; ++i)
{
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(nodeID, volumeParts[i].id, ref volumeInfo);
if (!bResult || volumeInfo.tupleSize != 1 || volumeInfo.zLength != 1 || volumeInfo.storage != HAPI_StorageType.HAPI_STORAGETYPE_FLOAT)
{
SetLog(HEU_LoadData.LoadStatus.ERROR, "This heightfield is not supported. Please check documentation.");
return false;
}
if (volumeInfo.xLength != volumeInfo.yLength)
{
SetLog(HEU_LoadData.LoadStatus.ERROR, "Non-square sized terrain not supported.");
return false;
}
string volumeName = HEU_SessionManager.GetString(volumeInfo.nameSH, session);
bool bHeightPart = volumeName.Equals(HEU_Defines.HAPI_HEIGHTFIELD_LAYERNAME_HEIGHT);
bool bMaskPart = volumeName.Equals(HEU_Defines.HAPI_HEIGHTFIELD_LAYERNAME_MASK);
//Debug.LogFormat("Part name: {0}, GeoName: {1}, Volume Name: {2}, Display: {3}", part.PartName, geoNode.GeoName, volumeName, geoNode.Displayable);
// Ignoring mask layer because it is Houdini-specific (same behaviour as regular HDA terrain generation)
if (bMaskPart)
{
continue;
}
HEU_LoadBufferVolumeLayer layer = new HEU_LoadBufferVolumeLayer();
layer._layerName = volumeName;
layer._partID = volumeParts[i].id;
layer._heightMapWidth = volumeInfo.xLength;
layer._heightMapHeight = volumeInfo.yLength;
Matrix4x4 volumeTransformMatrix = HEU_HAPIUtility.GetMatrixFromHAPITransform(ref volumeInfo.transform, false);
layer._position = HEU_HAPIUtility.GetPosition(ref volumeTransformMatrix);
Vector3 scale = HEU_HAPIUtility.GetScale(ref volumeTransformMatrix);
// Calculate real terrain size in both Houdini and Unity.
// The height values will be mapped over this terrain size.
float gridSpacingX = scale.x * 2f;
float gridSpacingY = scale.y * 2f;
layer._terrainSizeX = Mathf.Round((volumeInfo.xLength - 1) * gridSpacingX);
layer._terrainSizeY = Mathf.Round((volumeInfo.yLength - 1) * gridSpacingY);
// Get volume bounds for calculating position offset
session.GetVolumeBounds(nodeID, volumeParts[i].id,
out layer._minBounds.x, out layer._minBounds.y, out layer._minBounds.z,
out layer._maxBounds.x, out layer._maxBounds.y, out layer._maxBounds.z,
out layer._center.x, out layer._center.y, out layer._center.z);
// Look up TerrainLayer file via attribute if user has set it
layer._layerPath = HEU_GeneralUtility.GetAttributeStringValueSingle(session, nodeID, volumeParts[i].id,
HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TERRAINLAYER_FILE_ATTR, HAPI_AttributeOwner.HAPI_ATTROWNER_PRIM);
LoadStringFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TEXTURE_DIFFUSE_ATTR, ref layer._diffuseTexturePath);
LoadStringFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TEXTURE_MASK_ATTR, ref layer._maskTexturePath);
LoadStringFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TEXTURE_NORMAL_ATTR, ref layer._normalTexturePath);
LoadFloatFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_NORMAL_SCALE_ATTR, ref layer._normalScale);
LoadFloatFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_METALLIC_ATTR, ref layer._metallic);
LoadFloatFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_SMOOTHNESS_ATTR, ref layer._smoothness);
LoadLayerColorFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_SPECULAR_ATTR, ref layer._specularColor);
LoadLayerVector2FromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TILE_OFFSET_ATTR, ref layer._tileOffset);
LoadLayerVector2FromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TILE_SIZE_ATTR, ref layer._tileSize);
// Get the height values from Houdini along with the min and max height range.
layer._normalizedHeights = HEU_TerrainUtility.GetNormalizedHeightmapFromPartWithMinMax(_session, nodeID, volumeParts[i].id, volumeInfo.xLength, volumeInfo.yLength, ref layer._minHeight, ref layer._maxHeight, ref layer._heightRange);
// Get the tile index, if it exists, for this part
HAPI_AttributeInfo tileAttrInfo = new HAPI_AttributeInfo();
int[] tileAttrData = new int[0];
HEU_GeneralUtility.GetAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.HAPI_HEIGHTFIELD_TILE_ATTR, ref tileAttrInfo, ref tileAttrData, session.GetAttributeIntData);
int tileIndex = 0;
if (tileAttrInfo.exists && tileAttrData.Length == 1)
{
tileIndex = tileAttrData[0];
}
// Add layer based on tile index
if (tileIndex >= 0)
{
HEU_LoadBufferVolume volumeBuffer = null;
for(int j = 0; j < volumeBuffers.Count; ++j)
{
if (volumeBuffers[j]._tileIndex == tileIndex)
{
volumeBuffer = volumeBuffers[j];
break;
}
}
if (volumeBuffer == null)
{
volumeBuffer = new HEU_LoadBufferVolume();
volumeBuffer.InitializeBuffer(volumeParts[i].id, volumeName, false, false);
volumeBuffer._tileIndex = tileIndex;
volumeBuffers.Add(volumeBuffer);
}
if (bHeightPart)
{
// Height layer always first layer
volumeBuffer._layers.Insert(0, layer);
volumeBuffer._heightMapWidth = layer._heightMapWidth;
volumeBuffer._heightMapHeight = layer._heightMapHeight;
volumeBuffer._terrainSizeX = layer._terrainSizeX;
volumeBuffer._terrainSizeY = layer._terrainSizeY;
volumeBuffer._heightRange = (layer._maxHeight - layer._minHeight);
// Look up TerrainData file path via attribute if user has set it
volumeBuffer._terrainDataPath = HEU_GeneralUtility.GetAttributeStringValueSingle(session, nodeID, volumeBuffer._id,
HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TERRAINDATA_FILE_ATTR, HAPI_AttributeOwner.HAPI_ATTROWNER_PRIM);
// Load the TreePrototype buffers
List<HEU_TreePrototypeInfo> treePrototypeInfos = HEU_TerrainUtility.GetTreePrototypeInfosFromPart(session, nodeID, volumeBuffer._id);
if (treePrototypeInfos != null)
{
if (volumeBuffer._scatterTrees == null)
{
volumeBuffer._scatterTrees = new HEU_VolumeScatterTrees();
}
volumeBuffer._scatterTrees._treePrototypInfos = treePrototypeInfos;
}
}
else
{
volumeBuffer._layers.Add(layer);
}
}
Sleep();
}
// Each volume buffer is a self contained terrain tile
foreach(HEU_LoadBufferVolume volumeBuffer in volumeBuffers)
{
List<HEU_LoadBufferVolumeLayer> layers = volumeBuffer._layers;
//Debug.LogFormat("Heightfield: tile={0}, layers={1}", tile._tileIndex, layers.Count);
int heightMapWidth = volumeBuffer._heightMapWidth;
int heightMapHeight = volumeBuffer._heightMapHeight;
int numLayers = layers.Count;
if (numLayers > 0)
{
// Convert heightmap values from Houdini to Unity
volumeBuffer._heightMap = HEU_TerrainUtility.ConvertHeightMapHoudiniToUnity(heightMapWidth, heightMapHeight, layers[0]._normalizedHeights);
Sleep();
// Convert splatmap values from Houdini to Unity.
// Start at 2nd index since height is strictly for height values (not splatmap).
List<float[]> heightFields = new List<float[]>();
for(int m = 1; m < numLayers; ++m)
{
heightFields.Add(layers[m]._normalizedHeights);
}
// The number of maps are the number of splatmaps (ie. non height/mask layers)
int numMaps = heightFields.Count;
if (numMaps > 0)
{
// Using the first splatmap size for all splatmaps
volumeBuffer._splatMaps = HEU_TerrainUtility.ConvertHeightFieldToAlphaMap(layers[1]._heightMapWidth, layers[1]._heightMapHeight, heightFields);
}
else
{
volumeBuffer._splatMaps = null;
}
volumeBuffer._position = new Vector3((volumeBuffer._terrainSizeX + volumeBuffer._layers[0]._minBounds.x), volumeBuffer._layers[0]._minHeight + volumeBuffer._layers[0]._position.y, volumeBuffer._layers[0]._minBounds.z);
}
}
// Process the scatter instancer parts to get the scatter data
for (int i = 0; i < scatterInstancerParts.Count; ++i)
{
// Find the terrain tile (use primitive attr). Assume 0 tile if not set (i.e. not split into tiles)
int terrainTile = 0;
HAPI_AttributeInfo tileAttrInfo = new HAPI_AttributeInfo();
int[] tileAttrData = new int[0];
if (HEU_GeneralUtility.GetAttribute(session, nodeID, scatterInstancerParts[i].id, HEU_Defines.HAPI_HEIGHTFIELD_TILE_ATTR, ref tileAttrInfo, ref tileAttrData, session.GetAttributeIntData))
{
if (tileAttrData != null && tileAttrData.Length > 0)
{
terrainTile = tileAttrData[0];
}
}
// Find the volume layer associated with this part using the terrain tile index
HEU_LoadBufferVolume volumeBuffer = GetLoadBufferVolumeFromTileIndex(terrainTile, volumeBuffers);
if (volumeBuffer == null)
{
continue;
}
HEU_TerrainUtility.PopulateScatterInfo(session, nodeID, scatterInstancerParts[i].id, scatterInstancerParts[i].pointCount, ref volumeBuffer._scatterTrees);
}
return true;
}
/// <summary>
/// Creates terrain from given volumeInfo for the given gameObject.
/// If gameObject has a valid Terrain component, then it is reused.
/// Similarly, if the Terrain component has a valid TerrainData, or if the given terrainData is valid, then it is used.
/// Otherwise a new TerrainData is created and set to the Terrain.
/// Populates the volumePositionOffset with the heightfield offset position.
/// Returns true if successfully created the terrain, otherwise false.
/// </summary>
/// <param name="session">Houdini Engine session to query heightfield data from</param>
/// <param name="volumeInfo">Volume info pertaining to the heightfield to generate the Terrain from</param>
/// <param name="geoID">The geometry ID</param>
/// <param name="partID">The part ID (height layer)</param>
/// <param name="gameObject">The target GameObject containing the Terrain component</param>
/// <param name="terrainData">A valid TerrainData to use, or if empty, a new one is created and populated</param>
/// <param name="volumePositionOffset">Heightfield offset</param>
/// <returns>True if successfully popupated the terrain</returns>
public static bool GenerateTerrainFromVolume(HEU_SessionBase session, ref HAPI_VolumeInfo volumeInfo, HAPI_NodeId geoID, HAPI_PartId partID,
GameObject gameObject, ref TerrainData terrainData, out Vector3 volumePositionOffset, ref Terrain terrain)
{
volumePositionOffset = Vector3.zero;
if (volumeInfo.zLength == 1 && volumeInfo.tupleSize == 1)
{
// Heightfields will be converted to terrain in Unity.
// Unity requires terrainData.heightmapResolution to be square power of two plus 1 (eg. 513, 257, 129, 65).
// Houdini gives volumeInfo.xLength and volumeInfo.yLength which are the number of height values per dimension.
// Note that volumeInfo.xLength and volumeInfo.yLength is equal to Houdini heightfield size / grid spacing.
// The heightfield grid spacing is given as volumeTransformMatrix.scale but divided by 2 (grid spacing / 2 = volumeTransformMatrix.scale).
// It is recommended to use grid spacing of 2.
// Use the volumeInfo.transform to get the actual heightfield position and size.
Matrix4x4 volumeTransformMatrix = HEU_HAPIUtility.GetMatrixFromHAPITransform(ref volumeInfo.transform, false);
Vector3 position = HEU_HAPIUtility.GetPosition(ref volumeTransformMatrix);
Vector3 scale = HEU_HAPIUtility.GetScale(ref volumeTransformMatrix);
// Calculate real terrain size in both Houdini and Unity.
// The height values will be mapped over this terrain size.
float gridSpacingX = scale.x * 2f;
float gridSpacingY = scale.y * 2f;
float terrainSizeX = Mathf.Round((volumeInfo.xLength - 1) * gridSpacingX);
float terrainSizeY = Mathf.Round((volumeInfo.yLength - 1) * gridSpacingY);
// Test size
//float terrainSizeX = Mathf.Round((volumeInfo.xLength) * gridSpacingX);
//float terrainSizeY = Mathf.Round((volumeInfo.yLength) * gridSpacingY);
//Debug.LogFormat("GS = {0},{1},{2}. SX = {1}. SY = {2}", gridSpacingX, gridSpacingY, terrainSizeX, terrainSizeY);
//Debug.LogFormat("HeightField Pos:{0}, Scale:{1}", position, scale.ToString("{0.00}"));
//Debug.LogFormat("HeightField tileSize:{0}, xLength:{1}, yLength:{2}", volumeInfo.tileSize.ToString("{0.00}"), volumeInfo.xLength.ToString("{0.00}"), volumeInfo.yLength.ToString("{0.00}"));
//Debug.LogFormat("HeightField Terrain Size x:{0}, y:{1}", terrainSizeX.ToString("{0.00}"), terrainSizeY.ToString("{0.00}"));
//Debug.LogFormat("HeightField minX={0}, minY={1}, minZ={2}", volumeInfo.minX.ToString("{0.00}"), volumeInfo.minY.ToString("{0.00}"), volumeInfo.minZ.ToString("{0.00}"));
const int UNITY_MINIMUM_HEIGHTMAP_RESOLUTION = 33;
if (terrainSizeX < UNITY_MINIMUM_HEIGHTMAP_RESOLUTION || terrainSizeY < UNITY_MINIMUM_HEIGHTMAP_RESOLUTION)
{
Debug.LogWarningFormat("Unity Terrain has a minimum heightmap resolution of {0}. This HDA heightmap size is {1}x{2}."
+ "\nPlease resize the terrain to a value higher than this.",
UNITY_MINIMUM_HEIGHTMAP_RESOLUTION, terrainSizeX, terrainSizeY);
return false;
}
bool bNewTerrain = false;
bool bNewTerrainData = false;
terrain = gameObject.GetComponent<Terrain>();
if (terrain == null)
{
terrain = gameObject.AddComponent<Terrain>();
bNewTerrain = true;
}
#if !HEU_TERRAIN_COLLIDER_DISABLED
TerrainCollider collider = HEU_GeneralUtility.GetOrCreateComponent<TerrainCollider>(gameObject);
#endif
// Look up terrain material, if specified, on the height layer
string specifiedTerrainMaterialName = HEU_GeneralUtility.GetMaterialAttributeValueFromPart(session,
geoID, partID);
// This ensures to reuse existing terraindata, and only creates new if none exist or none provided
if (terrain.terrainData == null)
{
if (terrainData == null)
{
terrainData = new TerrainData();
bNewTerrainData = true;
}
terrain.terrainData = terrainData;
SetTerrainMaterial(terrain, specifiedTerrainMaterialName);
}
terrainData = terrain.terrainData;
#if !HEU_TERRAIN_COLLIDER_DISABLED
collider.terrainData = terrainData;
#endif
if (bNewTerrain)
{
#if UNITY_2018_3_OR_NEWER
terrain.allowAutoConnect = true;
// This has to be set after setting material
terrain.drawInstanced = true;
#endif
}
// Heightmap resolution must be square power-of-two plus 1.
// Unity will automatically resize terrainData.heightmapResolution so need to handle the changed size (if Unity changed it).
int heightMapResolution = volumeInfo.xLength;
terrainData.heightmapResolution = heightMapResolution;
int terrainResizedDelta = terrainData.heightmapResolution - heightMapResolution;
if (terrainResizedDelta < 0)
{
Debug.LogWarningFormat("Note that Unity automatically resized terrain resolution to {0} from {1}. Use terrain size of power of two plus 1, and grid spacing of 2.", heightMapResolution, terrainData.heightmapResolution);
heightMapResolution = terrainData.heightmapResolution;
}
else if (terrainResizedDelta > 0)
{
Debug.LogErrorFormat("Unsupported terrain size. Use terrain size of power of two plus 1, and grid spacing of 2. Given size is {0} but Unity resized it to {1}.", heightMapResolution, terrainData.heightmapResolution);
return false;
}
int mapWidth = volumeInfo.xLength;
int mapHeight = volumeInfo.yLength;
// Get the converted height values from Houdini and find the min and max height range.
float minHeight = 0;
float maxHeight = 0;
float heightRange = 0;
bool bUseHeightRangeOverride = true;
float[] normalizedHeights = GetNormalizedHeightmapFromPartWithMinMax(session, geoID, partID,
volumeInfo.xLength, volumeInfo.yLength, ref minHeight, ref maxHeight, ref heightRange,
bUseHeightRangeOverride);
float[,] unityHeights = ConvertHeightMapHoudiniToUnity(heightMapResolution, heightMapResolution, normalizedHeights);
// The terrainData.baseMapResolution is not set here, but rather left to whatever default Unity uses
// The terrainData.alphamapResolution is set later when setting the alphamaps.
if (bNewTerrainData)
{
// 32 is the default for resolutionPerPatch
const int detailResolution = 1024;
const int resolutionPerPatch = 32;
terrainData.SetDetailResolution(detailResolution, resolutionPerPatch);
}
// Note SetHeights must be called before setting size in next line, as otherwise
// the internal terrain size will not change after setting the size.
terrainData.SetHeights(0, 0, unityHeights);
// Note that Unity uses a default height range of 600 when a flat terrain is created.
// Without a non-zero value for the height range, user isn't able to draw heights.
// Therefore, set 600 as the value if height range is currently 0 (due to flat heightfield).
if (heightRange == 0)
{
heightRange = terrainData.size.y > 1 ? terrainData.size.y : 600;
}
terrainData.size = new Vector3(terrainSizeX, heightRange, terrainSizeY);
terrain.Flush();
// Unity Terrain has origin at bottom left, whereas Houdini uses centre of terrain.
// Use volume bounds to set position offset when using split tiles
float xmin, xmax, zmin, zmax, ymin, ymax, xcenter, ycenter, zcenter;
session.GetVolumeBounds(geoID, partID, out xmin, out ymin, out zmin, out xmax, out ymax, out zmax, out xcenter,
out ycenter, out zcenter);
//Debug.LogFormat("xmin: {0}, xmax: {1}, ymin: {2}, ymax: {3}, zmin: {4}, zmax: {5}, xc: {6}, yc: {7}, zc: {8}",
// xmin, xmax, ymin, ymax, zmin, zmax, xcenter, ycenter, zcenter);
// Offset position is based on size of heightfield
float offsetX = (float)heightMapResolution / (float)mapWidth;
float offsetZ = (float)heightMapResolution / (float)mapHeight;
//Debug.LogFormat("offsetX: {0}, offsetZ: {1}", offsetX, offsetZ);
// Use y position from attribute if user has set it
float ypos = position.y + minHeight;
float userYPos;
if (HEU_GeneralUtility.GetAttributeFloatSingle(session, geoID, partID,
HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_YPOS, out userYPos))
{
ypos = userYPos;
}
// TODO: revisit how the position is calculated
volumePositionOffset = new Vector3((terrainSizeX + xmin) * offsetX, ypos, zmin * offsetZ);
// Test position
//volumePositionOffset = new Vector3(xcenter + mapWidth, ycenter, zcenter - mapHeight);
return true;
}
else
{
Debug.LogWarning("Non-heightfield volume type not supported!");
}
return false;
}
/// <summary>
/// Upload the alphamaps (TerrainLayers) into heightfield network.
/// </summary>
/// <param name="session"></param>
/// <param name="idt"></param>
/// <param name="baseVolumeInfo">The valid base height HAPI_VolumeInfo</param>
/// <param name="bMaskSet">This is set to true if a mask layer was uploaded</param>
/// <returns>True if successfully uploaded all layers</returns>
public bool UploadAlphaMaps(HEU_SessionBase session, HEU_InputDataTerrain idt, ref HAPI_VolumeInfo baseVolumeInfo, out bool bMaskSet)
{
bool bResult = true;
bMaskSet = false;
int alphaLayers = idt._terrainData.alphamapLayers;
if (alphaLayers < 1)
{
return(bResult);
}
int sizeX = idt._terrainData.alphamapWidth;
int sizeY = idt._terrainData.alphamapHeight;
int totalSize = sizeX * sizeY;
float[,,] alphaMaps = idt._terrainData.GetAlphamaps(0, 0, sizeX, sizeY);
float[][] alphaMapsConverted = new float[alphaLayers][];
// Convert the alphamap layers to double arrays.
for (int m = 0; m < alphaLayers; ++m)
{
alphaMapsConverted[m] = new float[totalSize];
for (int j = 0; j < sizeY; j++)
{
for (int i = 0; i < sizeX; i++)
{
// Flip for coordinate system change
float h = alphaMaps[i, (sizeY - j - 1), m];
alphaMapsConverted[m][i + j * sizeX] = h;
}
}
}
// Create volume layers for all alpha maps and upload values.
bool bMaskLayer = false;
int inputLayerIndex = 1;
for (int m = 0; m < alphaLayers; ++m)
{
#if UNITY_2018_3_OR_NEWER
string layerName = idt._terrainData.terrainLayers[m].name;
#else
string layerName = "unity_alphamap_" + m + 1;
#endif
// The Unity layer name could contain '.terrainlayer' and spaces. Remove them because Houdini doesn't allow
// spaces, and the extension isn't necessary.
layerName = layerName.Replace(" ", "_");
int extIndex = layerName.LastIndexOf(HEU_Defines.HEU_EXT_TERRAINLAYER);
if (extIndex > 0)
{
layerName = layerName.Remove(extIndex);
}
//Debug.Log("Processing terrain layer: " + layerName);
HAPI_NodeId alphaLayerID = HEU_Defines.HEU_INVALID_NODE_ID;
if (layerName.Equals(HEU_Defines.HAPI_HEIGHTFIELD_LAYERNAME_HEIGHT))
{
// Skip height (base) layer (since it has been uploaded already)
continue;
}
else if (layerName.Equals(HEU_Defines.HAPI_HEIGHTFIELD_LAYERNAME_MASK))
{
//Debug.Log("Mask layer found! Skipping creating the HF.");
bMaskSet = true;
bMaskLayer = true;
alphaLayerID = idt._maskNodeID;
}
else
{
bMaskLayer = false;
if (!session.CreateHeightfieldInputVolumeNode(idt._heightfieldNodeID, out alphaLayerID, layerName,
Mathf.RoundToInt(sizeX * idt._voxelSize), Mathf.RoundToInt(sizeY * idt._voxelSize), idt._voxelSize))
{
bResult = false;
Debug.LogError("Failed to create input volume node for layer " + layerName);
break;
}
}
//Debug.Log("Uploading terrain layer: " + layerName);
if (!SetHeightFieldData(session, alphaLayerID, 0, alphaMapsConverted[m], layerName, ref baseVolumeInfo))
{
bResult = false;
break;
}
#if UNITY_2018_3_OR_NEWER
SetTerrainLayerAttributesToHeightField(session, alphaLayerID, 0, idt._terrainData.terrainLayers[m]);
#endif
if (!session.CommitGeo(alphaLayerID))
{
bResult = false;
Debug.LogError("Failed to commit volume layer " + layerName);
break;
}
if (!bMaskLayer)
{
// Connect to the merge node but starting from index 1 since index 0 is height layer
if (!session.ConnectNodeInput(idt._mergeNodeID, inputLayerIndex + 1, alphaLayerID, 0))
{
bResult = false;
Debug.LogError("Unable to connect new volume node for layer " + layerName);
break;
}
inputLayerIndex++;
}
}
return(bResult);
}
public void UpdateLayerFromPart(HEU_SessionBase session, HEU_PartData part)
{
HEU_GeoNode geoNode = part.ParentGeoNode;
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(geoNode.GeoID, part.PartID, ref volumeInfo);
if (!bResult || volumeInfo.tupleSize != 1 || volumeInfo.zLength != 1 || volumeInfo.storage != HAPI_StorageType.HAPI_STORAGETYPE_FLOAT)
{
return;
}
string volumeName = HEU_SessionManager.GetString(volumeInfo.nameSH, session);
part.SetVolumeLayerName(volumeName);
//Debug.LogFormat("Part name: {0}, GeoName: {1}, Volume Name: {2}, Display: {3}", part.PartName, geoNode.GeoName, volumeName, geoNode.Displayable);
HFLayerType layerType = HEU_TerrainUtility.GetHeightfieldLayerType(session, geoNode.GeoID, part.PartID, volumeName);
HEU_VolumeLayer layer = GetLayer(volumeName);
if (layer == null)
{
layer = new HEU_VolumeLayer();
layer._layerName = volumeName;
if (layerType == HFLayerType.HEIGHT)
{
_layers.Insert(0, layer);
}
else if (layerType != HFLayerType.MASK)
{
_layers.Add(layer);
}
}
layer._part = part;
layer._xLength = volumeInfo.xLength;
layer._yLength = volumeInfo.yLength;
layer._layerType = layerType;
if (layerType != HFLayerType.MASK)
{
GetPartLayerAttributes(session, geoNode.GeoID, part.PartID, layer);
}
if (layerType != HFLayerType.HEIGHT)
{
// Non-height parts don't have any outputs as they are simply layers carrying info
part.DestroyAllData();
}
else
{
// Height part
// Might contain terrain properties via attributes (i.e. not layer specific, but for entire terrain)
// Scatter Tree Prototypes
List<HEU_TreePrototypeInfo> treePrototypeInfos = HEU_TerrainUtility.GetTreePrototypeInfosFromPart(session, geoNode.GeoID, part.PartID);
if (treePrototypeInfos != null)
{
if (_scatterTrees == null)
{
_scatterTrees = new HEU_VolumeScatterTrees();
}
_scatterTrees._treePrototypInfos = treePrototypeInfos;
}
HEU_TerrainUtility.PopulateDetailProperties(session, geoNode.GeoID,
part.PartID, ref _detailProperties);
}
if (!_updatedLayers.Contains(layer))
{
if (layerType == HFLayerType.HEIGHT)
{
_updatedLayers.Insert(0, layer);
}
else if (layerType != HFLayerType.MASK)
{
_updatedLayers.Add(layer);
}
}
}
public bool GenerateTerrainBuffers(HEU_SessionBase session, HAPI_NodeId nodeID, List<HAPI_PartInfo> volumeParts,
out List<HEU_LoadBufferVolume> volumeBuffers)
{
volumeBuffers = null;
if (volumeParts.Count == 0)
{
return true;
}
volumeBuffers = new List<HEU_LoadBufferVolume>();
int numParts = volumeParts.Count;
for (int i = 0; i < numParts; ++i)
{
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(nodeID, volumeParts[i].id, ref volumeInfo);
if (!bResult || volumeInfo.tupleSize != 1 || volumeInfo.zLength != 1 || volumeInfo.storage != HAPI_StorageType.HAPI_STORAGETYPE_FLOAT)
{
SetLog(HEU_LoadData.LoadStatus.ERROR, "This heightfield is not supported. Please check documentation.");
return false;
}
if (volumeInfo.xLength != volumeInfo.yLength)
{
SetLog(HEU_LoadData.LoadStatus.ERROR, "Non-square sized terrain not supported.");
return false;
}
string volumeName = HEU_SessionManager.GetString(volumeInfo.nameSH, session);
bool bHeightPart = volumeName.Equals("height");
//Debug.LogFormat("Part name: {0}, GeoName: {1}, Volume Name: {2}, Display: {3}", part.PartName, geoNode.GeoName, volumeName, geoNode.Displayable);
HEU_LoadBufferVolumeLayer layer = new HEU_LoadBufferVolumeLayer();
layer._layerName = volumeName;
layer._partID = volumeParts[i].id;
layer._heightMapSize = volumeInfo.xLength;
Matrix4x4 volumeTransformMatrix = HEU_HAPIUtility.GetMatrixFromHAPITransform(ref volumeInfo.transform, false);
layer._position = HEU_HAPIUtility.GetPosition(ref volumeTransformMatrix);
Vector3 scale = HEU_HAPIUtility.GetScale(ref volumeTransformMatrix);
// Calculate real terrain size in both Houdini and Unity.
// The height values will be mapped over this terrain size.
float gridSpacingX = scale.x * 2f;
float gridSpacingY = scale.y * 2f;
layer._terrainSizeX = Mathf.Round((volumeInfo.xLength - 1) * gridSpacingX);
layer._terrainSizeY = Mathf.Round((volumeInfo.yLength - 1) * gridSpacingY);
// Get volume bounds for calculating position offset
session.GetVolumeBounds(nodeID, volumeParts[i].id,
out layer._minBounds.x, out layer._minBounds.y, out layer._minBounds.z,
out layer._maxBounds.x, out layer._maxBounds.y, out layer._maxBounds.z,
out layer._center.x, out layer._center.y, out layer._center.z);
LoadStringFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TEXTURE_DIFFUSE_ATTR, ref layer._diffuseTexturePath);
LoadStringFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TEXTURE_MASK_ATTR, ref layer._maskTexturePath);
LoadStringFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TEXTURE_NORMAL_ATTR, ref layer._normalTexturePath);
LoadFloatFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_NORMAL_SCALE_ATTR, ref layer._normalScale);
LoadFloatFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_METALLIC_ATTR, ref layer._metallic);
LoadFloatFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_SMOOTHNESS_ATTR, ref layer._smoothness);
LoadLayerColorFromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_SPECULAR_ATTR, ref layer._specularColor);
LoadLayerVector2FromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TILE_OFFSET_ATTR, ref layer._tileOffset);
LoadLayerVector2FromAttribute(session, nodeID, volumeParts[i].id, HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TILE_SIZE_ATTR, ref layer._tileSize);
// Get the height values from Houdini and find the min and max height range.
if (!HEU_GeometryUtility.GetHeightfieldValues(session, volumeInfo.xLength, volumeInfo.yLength, nodeID, volumeParts[i].id, ref layer._rawHeights, ref layer._minHeight, ref layer._maxHeight))
{
return false;
}
// TODO: Tried to replace above with this, but it flattens the heights
//layer._rawHeights = HEU_GeometryUtility.GetHeightfieldFromPart(_session, nodeID, volumeParts[i].id, "part", volumeInfo.xLength);
// Get the tile index, if it exists, for this part
HAPI_AttributeInfo tileAttrInfo = new HAPI_AttributeInfo();
int[] tileAttrData = new int[0];
HEU_GeneralUtility.GetAttribute(session, nodeID, volumeParts[i].id, "tile", ref tileAttrInfo, ref tileAttrData, session.GetAttributeIntData);
int tileIndex = 0;
if (tileAttrInfo.exists && tileAttrData.Length == 1)
{
tileIndex = tileAttrData[0];
}
// Add layer based on tile index
if (tileIndex >= 0)
{
HEU_LoadBufferVolume volumeBuffer = null;
for(int j = 0; j < volumeBuffers.Count; ++j)
{
if (volumeBuffers[j]._tileIndex == tileIndex)
{
volumeBuffer = volumeBuffers[j];
break;
}
}
if (volumeBuffer == null)
{
volumeBuffer = new HEU_LoadBufferVolume();
volumeBuffer.InitializeBuffer(volumeParts[i].id, volumeName, false, false);
volumeBuffer._tileIndex = tileIndex;
volumeBuffers.Add(volumeBuffer);
}
if (bHeightPart)
{
// Height layer always first layer
volumeBuffer._layers.Insert(0, layer);
volumeBuffer._heightMapSize = layer._heightMapSize;
volumeBuffer._terrainSizeX = layer._terrainSizeX;
volumeBuffer._terrainSizeY = layer._terrainSizeY;
volumeBuffer._heightRange = (layer._maxHeight - layer._minHeight);
}
else
{
volumeBuffer._layers.Add(layer);
}
}
Sleep();
}
// Each volume buffer is a self contained terrain tile
foreach(HEU_LoadBufferVolume volumeBuffer in volumeBuffers)
{
List<HEU_LoadBufferVolumeLayer> layers = volumeBuffer._layers;
//Debug.LogFormat("Heightfield: tile={0}, layers={1}", tile._tileIndex, layers.Count);
int heightMapSize = volumeBuffer._heightMapSize;
int numLayers = layers.Count;
if (numLayers > 0)
{
// Convert heightmap values from Houdini to Unity
volumeBuffer._heightMap = HEU_GeometryUtility.ConvertHeightMapHoudiniToUnity(heightMapSize, layers[0]._rawHeights, layers[0]._minHeight, layers[0]._maxHeight);
Sleep();
// Convert splatmap values from Houdini to Unity.
List<float[]> heightFields = new List<float[]>();
for(int m = 1; m < numLayers; ++m)
{
heightFields.Add(layers[m]._rawHeights);
}
volumeBuffer._splatMaps = HEU_GeometryUtility.ConvertHeightSplatMapHoudiniToUnity(heightMapSize, heightFields);
volumeBuffer._position = new Vector3((volumeBuffer._terrainSizeX + volumeBuffer._layers[0]._minBounds.x), volumeBuffer._layers[0]._minHeight + volumeBuffer._layers[0]._position.y, volumeBuffer._layers[0]._minBounds.z);
}
}
return true;
}
public void UpdateLayerFromPart(HEU_SessionBase session, HEU_PartData part)
{
HEU_GeoNode geoNode = part.ParentGeoNode;
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(geoNode.GeoID, part.PartID, ref volumeInfo);
if (!bResult || volumeInfo.tupleSize != 1 || volumeInfo.zLength != 1 || volumeInfo.storage != HAPI_StorageType.HAPI_STORAGETYPE_FLOAT)
{
return;
}
string volumeName = HEU_SessionManager.GetString(volumeInfo.nameSH, session);
part.SetVolumeLayerName(volumeName);
//Debug.LogFormat("Part name: {0}, GeoName: {1}, Volume Name: {2}, Display: {3}", part.PartName, geoNode.GeoName, volumeName, geoNode.Displayable);
HEU_VolumeLayer.HFLayerType layerType = GetHeightfieldLayerType(session, geoNode.GeoID, part.PartID, volumeName);
HEU_VolumeLayer layer = GetLayer(volumeName);
if (layer == null)
{
layer = new HEU_VolumeLayer();
layer._layerName = volumeName;
if (layerType == HEU_VolumeLayer.HFLayerType.HEIGHT)
{
_layers.Insert(0, layer);
}
else if(layerType != HEU_VolumeLayer.HFLayerType.MASK)
{
_layers.Add(layer);
}
}
layer._part = part;
layer._xLength = volumeInfo.xLength;
layer._yLength = volumeInfo.yLength;
layer._layerType = layerType;
if (layerType != HEU_VolumeLayer.HFLayerType.MASK)
{
GetPartLayerAttributes(session, geoNode.GeoID, part.PartID, layer);
}
if (layerType != HEU_VolumeLayer.HFLayerType.HEIGHT)
{
// Non-height parts don't have any outputs as they are simply layers carrying info
part.DestroyAllData();
}
else
{
// Height part
// Might contain terrain properties via attributes (i.e. not layer specific, but for entire terrain)
// Scatter Tree Prototypes
List<HEU_TreePrototypeInfo> treePrototypeInfos = HEU_TerrainUtility.GetTreePrototypeInfosFromPart(session, geoNode.GeoID, part.PartID);
if (treePrototypeInfos != null)
{
if (_scatterTrees == null)
{
_scatterTrees = new HEU_VolumeScatterTrees();
}
_scatterTrees._treePrototypInfos = treePrototypeInfos;
}
// Detail distance
HAPI_AttributeInfo detailDistanceAttrInfo = new HAPI_AttributeInfo();
int[] detailDistances = new int[0];
HEU_GeneralUtility.GetAttribute(session, geoNode.GeoID, part.PartID,
HEU_Defines.HEIGHTFIELD_DETAIL_DISTANCE, ref detailDistanceAttrInfo, ref detailDistances,
session.GetAttributeIntData);
// Scatter Detail Resolution Per Patch (note that Detail Resolution comes from HF layer size)
HAPI_AttributeInfo resolutionPatchAttrInfo = new HAPI_AttributeInfo();
int[] resolutionPatches = new int[0];
HEU_GeneralUtility.GetAttribute(session, geoNode.GeoID, part.PartID,
HEU_Defines.HEIGHTFIELD_DETAIL_RESOLUTION_PER_PATCH, ref resolutionPatchAttrInfo,
ref resolutionPatches, session.GetAttributeIntData);
if (_detailProperties == null)
{
_detailProperties = new HEU_DetailProperties();
}
// Unity only supports 1 set of detail resolution properties per terrain
int arraySize = 1;
if (detailDistanceAttrInfo.exists && detailDistances.Length >= arraySize)
{
_detailProperties._detailDistance = detailDistances[0];
}
if (resolutionPatchAttrInfo.exists && resolutionPatches.Length >= arraySize)
{
_detailProperties._detailResolutionPerPatch = resolutionPatches[0];
}
}
if (!_updatedLayers.Contains(layer))
{
if (layerType == HEU_VolumeLayer.HFLayerType.HEIGHT)
{
_updatedLayers.Insert(0, layer);
}
else if (layerType != HEU_VolumeLayer.HFLayerType.MASK)
{
_updatedLayers.Add(layer);
}
}
}
public virtual bool SetVolumeInfo(HAPI_NodeId nodeID, HAPI_PartId partID, ref HAPI_VolumeInfo volumeInfo)
{
return false;
}
/// <summary>
/// Creates a heightfield network inside the same object as connectNodeID.
/// Uploads the terrain data from inputObject into the new heightfield network, incuding
/// all terrain layers/alphamaps.
/// </summary>
/// <param name="session">Session that connectNodeID exists in</param>
/// <param name="connectNodeID">The node to connect the network to. Most likely a SOP/merge node</param>
/// <param name="inputObject">The gameobject containing the Terrain components</param>
/// <param name="inputNodeID">The created heightfield network node ID</param>
/// <returns>True if created network and uploaded heightfield data.</returns>
public override bool CreateInputNodeWithDataUpload(HEU_SessionBase session, HAPI_NodeId connectNodeID, GameObject inputObject, out HAPI_NodeId inputNodeID)
{
inputNodeID = HEU_Defines.HEU_INVALID_NODE_ID;
// Create input node, cook it, then upload the geometry data
if (!HEU_HAPIUtility.IsNodeValidInHoudini(session, connectNodeID))
{
Debug.LogError("Connection node is invalid.");
return(false);
}
HEU_InputDataTerrain idt = GenerateTerrainDataFromGameObject(inputObject);
if (idt == null)
{
return(false);
}
HAPI_NodeId parentNodeID = HEU_HAPIUtility.GetParentNodeID(session, connectNodeID);
idt._parentNodeID = parentNodeID;
if (!CreateHeightFieldInputNode(session, idt))
{
return(false);
}
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
if (!UploadHeightValuesWithTransform(session, idt, ref volumeInfo))
{
return(false);
}
inputNodeID = idt._heightfieldNodeID;
bool bMaskSet = false;
if (!UploadAlphaMaps(session, idt, ref volumeInfo, out bMaskSet))
{
return(false);
}
if (!bMaskSet)
{
// While the default HF created by the input node also creates a default mask layer,
// we still need to set the mask layer's transform. So this uses the base VolumeInfo
// to do just that.
if (!SetMaskLayer(session, idt, ref volumeInfo))
{
return(false);
}
}
if (!session.CookNode(inputNodeID, false))
{
Debug.LogError("New input node failed to cook!");
return(false);
}
return(true);
}
public void UpdateLayerFromPart(HEU_SessionBase session, HEU_PartData part)
{
HEU_GeoNode geoNode = part.ParentGeoNode;
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(geoNode.GeoID, part.PartID, ref volumeInfo);
if (!bResult || volumeInfo.tupleSize != 1 || volumeInfo.zLength != 1 || volumeInfo.storage != HAPI_StorageType.HAPI_STORAGETYPE_FLOAT)
{
return;
}
string volumeName = HEU_SessionManager.GetString(volumeInfo.nameSH, session);
part.SetVolumeLayerName(volumeName);
//Debug.LogFormat("Part name: {0}, GeoName: {1}, Volume Name: {2}, Display: {3}", part.PartName, geoNode.GeoName, volumeName, geoNode.Displayable);
bool bHeightPart = volumeName.Equals(HEU_Defines.HAPI_HEIGHTFIELD_LAYERNAME_HEIGHT);
bool bMaskPart = volumeName.Equals(HEU_Defines.HAPI_HEIGHTFIELD_LAYERNAME_MASK);
HEU_VolumeLayer layer = GetLayer(volumeName);
if (layer == null)
{
layer = new HEU_VolumeLayer();
layer._layerName = volumeName;
if (bHeightPart)
{
_layers.Insert(0, layer);
}
else if(!bMaskPart)
{
_layers.Add(layer);
}
}
layer._part = part;
layer._xLength = volumeInfo.xLength;
layer._yLength = volumeInfo.yLength;
if (!bMaskPart)
{
GetPartLayerAttributes(session, geoNode.GeoID, part.PartID, layer);
}
if (!bHeightPart)
{
// Non-height parts don't have any outputs as they are simply layers carrying info
part.DestroyAllData();
}
else
{
// Height part
List<HEU_TreePrototypeInfo> treePrototypeInfos = HEU_TerrainUtility.GetTreePrototypeInfosFromPart(session, geoNode.GeoID, part.PartID);
if (treePrototypeInfos != null)
{
if (_scatterTrees == null)
{
_scatterTrees = new HEU_VolumeScatterTrees();
}
_scatterTrees._treePrototypInfos = treePrototypeInfos;
}
}
if (!_updatedLayers.Contains(layer))
{
if (bHeightPart)
{
_updatedLayers.Insert(0, layer);
}
else if (!bMaskPart)
{
_updatedLayers.Add(layer);
}
}
}
public void GenerateTerrainWithAlphamaps(HEU_SessionBase session, HEU_HoudiniAsset houdiniAsset)
{
if(_layers == null || _layers.Count == 0)
{
Debug.LogError("Unable to generate terrain due to lack of heightfield layers!");
return;
}
HEU_VolumeLayer baseLayer = _layers[0];
HAPI_VolumeInfo baseVolumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(_ownerNode.GeoID, baseLayer._part.PartID, ref baseVolumeInfo);
if (!bResult)
{
Debug.LogErrorFormat("Unable to get volume info for layer {0}!", baseLayer._layerName);
return;
}
TerrainData terrainData = null;
Vector3 terrainOffsetPosition = Vector3.zero;
// Generate the terrain and terrain data from the heightmap's height layer
bResult = HEU_GeometryUtility.GenerateTerrainFromVolume(session, ref baseVolumeInfo, baseLayer._part.ParentGeoNode.GeoID,
baseLayer._part.PartID, baseLayer._part.OutputGameObject, out terrainData, out terrainOffsetPosition);
if (!bResult)
{
return;
}
baseLayer._part.SetTerrainData(terrainData);
baseLayer._part.SetTerrainOffsetPosition(terrainOffsetPosition);
int terrainSize = terrainData.heightmapResolution;
// Now set the alphamaps (textures with masks) for the other layers
// First, preprocess all layers to get heightfield arrays, converted to proper size
// Then, merge into a float[x,y,map]
List<float[]> heightFields = new List<float[]>();
List<HEU_VolumeLayer> validLayers = new List<HEU_VolumeLayer>();
int numLayers = _layers.Count;
for(int i = 1; i < numLayers; ++i)
{
float[] hf = HEU_GeometryUtility.GetHeightfieldFromPart(session, _ownerNode.GeoID, _layers[i]._part.PartID, _layers[i]._part.PartName, terrainSize);
if (hf != null && hf.Length > 0)
{
heightFields.Add(hf);
validLayers.Add(_layers[i]);
}
}
// Total maps is masks plus base height layer
int numMaps = heightFields.Count + 1;
// Assign floats to alpha map
float[,,] alphamap = new float[terrainSize, terrainSize, numMaps];
for (int y = 0; y < terrainSize; ++y)
{
for (int x = 0; x < terrainSize; ++x)
{
float f = 0f;
for (int m = numMaps - 1; m > 0; --m)
{
float a = heightFields[m - 1][y + terrainSize * x];
a = Mathf.Clamp01(a - f) * validLayers[m - 1]._strength;
alphamap[x, y, m] = a;
f += a;
}
// Base layer gets leftover value
alphamap[x, y, 0] = Mathf.Clamp01(1.0f - f) * baseLayer._strength;
}
}
#if UNITY_2018_3_OR_NEWER
// Create TerrainLayer for each heightfield layer
// Note that at time of this implementation the new Unity terrain
// is still in beta. Therefore, the following layer creation is subject
// to change.
TerrainLayer[] terrainLayers = new TerrainLayer[numMaps];
for (int m = 0; m < numMaps; ++m)
{
terrainLayers[m] = new TerrainLayer();
HEU_VolumeLayer layer = (m == 0) ? baseLayer : validLayers[m - 1];
terrainLayers[m].diffuseTexture = layer._diffuseTexture;
terrainLayers[m].diffuseRemapMin = Vector4.zero;
terrainLayers[m].diffuseRemapMax = Vector4.one;
terrainLayers[m].maskMapTexture = layer._maskTexture;
terrainLayers[m].maskMapRemapMin = Vector4.zero;
terrainLayers[m].maskMapRemapMax = Vector4.one;
terrainLayers[m].metallic = layer._metallic;
terrainLayers[m].normalMapTexture = layer._normalTexture;
terrainLayers[m].normalScale = layer._normalScale;
terrainLayers[m].smoothness = layer._smoothness;
terrainLayers[m].specular = layer._specularColor;
terrainLayers[m].tileOffset = layer._tileOffset;
if (layer._tileSize.magnitude == 0f)
{
// Use texture size if tile size is 0
layer._tileSize = new Vector2(layer._diffuseTexture.width, layer._diffuseTexture.height);
}
terrainLayers[m].tileSize = layer._tileSize;
}
terrainData.terrainLayers = terrainLayers;
#else
// Need to create SplatPrototype for each layer in heightfield, representing the textures.
SplatPrototype[] splatPrototypes = new SplatPrototype[numMaps];
for (int m = 0; m < numMaps; ++m)
{
splatPrototypes[m] = new SplatPrototype();
HEU_VolumeLayer layer = (m == 0) ? baseLayer : validLayers[m - 1];
splatPrototypes[m].texture = layer._diffuseTexture;
splatPrototypes[m].tileOffset = layer._tileOffset;
if(layer._tileSize.magnitude == 0f)
{
// Use texture size if tile size is 0
layer._tileSize = new Vector2(layer._diffuseTexture.width, layer._diffuseTexture.height);
}
splatPrototypes[m].tileSize = layer._tileSize;
splatPrototypes[m].metallic = layer._metallic;
splatPrototypes[m].smoothness = layer._smoothness;
splatPrototypes[m].normalMap = layer._normalTexture;
}
terrainData.splatPrototypes = splatPrototypes;
#endif
terrainData.SetAlphamaps(0, 0, alphamap);
}
/// <summary>
/// Process the part at the given index, creating its data (geometry),
/// and adding it to the list of parts.
/// </summary>
/// <param name="session"></param>
/// <param name="partID"></param>
/// <returns>A valid HEU_PartData if it has been successfully processed.</returns>
private void ProcessPart(HEU_SessionBase session, int partID, ref HAPI_PartInfo partInfo, ref HEU_PartData partData)
{
HEU_HoudiniAsset parentAsset = ParentAsset;
bool bResult = true;
//Debug.LogFormat("Part: name={0}, id={1}, type={2}, instanced={3}, instance count={4}, instance part count={5}", HEU_SessionManager.GetString(partInfo.nameSH, session), partID, partInfo.type, partInfo.isInstanced, partInfo.instanceCount, partInfo.instancedPartCount);
#if HEU_PROFILER_ON
float processPartStartTime = Time.realtimeSinceStartup;
#endif
bool isPartEditable = IsIntermediateOrEditable();
bool isAttribInstancer = false;
if (IsGeoInputType())
{
// Setup for input node to accept inputs
if (_inputNode == null)
{
string partName = HEU_SessionManager.GetString(partInfo.nameSH, session);
_inputNode = HEU_InputNode.CreateSetupInput(GeoID, 0, partName, HEU_InputNode.InputNodeType.NODE, ParentAsset);
if (_inputNode != null)
{
ParentAsset.AddInputNode(_inputNode);
}
}
if (HEU_HAPIUtility.IsSupportedPolygonType(partInfo.type) && partInfo.vertexCount == 0)
{
// No geometry for input asset
if (partData != null)
{
// Clean up existing part
HEU_PartData.DestroyPart(partData);
partData = null;
}
// No need to process further since we don't have geometry
return;
}
}
else
{
// Preliminary check for attribute instancing (mesh type with no verts but has points with instances)
if (HEU_HAPIUtility.IsSupportedPolygonType(partInfo.type) && partInfo.vertexCount == 0 && partInfo.pointCount > 0)
{
HAPI_AttributeInfo instanceAttrInfo = new HAPI_AttributeInfo();
HEU_GeneralUtility.GetAttributeInfo(session, GeoID, partID, HEU_PluginSettings.UnityInstanceAttr, ref instanceAttrInfo);
if (instanceAttrInfo.exists && instanceAttrInfo.count > 0)
{
isAttribInstancer = true;
}
}
}
if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_INVALID)
{
// Clean up invalid parts
if (partData != null)
{
HEU_PartData.DestroyPart(partData);
partData = null;
}
}
else if (partInfo.type < HAPI_PartType.HAPI_PARTTYPE_MAX)
{
// Process the part based on type. Keep or ignore.
// We treat parts of type curve as curves, along with geo nodes that are editable and type curves
if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_CURVE)
{
if (partData == null)
{
partData = ScriptableObject.CreateInstance <HEU_PartData>();
}
partData.Initialize(session, partID, GeoID, _containerObjectNode.ObjectID, this, ref partInfo,
HEU_PartData.PartOutputType.CURVE, isPartEditable, _containerObjectNode.IsInstancer(), false);
SetupGameObjectAndTransform(partData, parentAsset);
partData.ProcessCurvePart(session);
}
else if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_VOLUME)
{
// We only process "height" volume parts. Other volume parts are ignored for now.
#if TERRAIN_SUPPORTED
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bResult = session.GetVolumeInfo(GeoID, partID, ref volumeInfo);
if (!bResult)
{
Debug.LogErrorFormat("Unable to get volume info for geo node {0} and part {1} ", GeoID, partID);
}
else
{
if (Displayable && !IsIntermediateOrEditable())
{
if (partData == null)
{
partData = ScriptableObject.CreateInstance <HEU_PartData>();
}
else
{
// Clear volume data (case where switching from polygonal mesh to volume output)
partData.ClearGeneratedMeshOutput();
}
partData.Initialize(session, partID, GeoID, _containerObjectNode.ObjectID, this, ref partInfo,
HEU_PartData.PartOutputType.VOLUME, isPartEditable, _containerObjectNode.IsInstancer(), false);
SetupGameObjectAndTransform(partData, ParentAsset);
}
}
#else
Debug.LogWarningFormat("Terrain (heightfield volume) is not yet supported.");
#endif
}
else if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_INSTANCER || isAttribInstancer)
{
if (partData == null)
{
partData = ScriptableObject.CreateInstance <HEU_PartData>();
}
else
{
partData.ClearGeneratedMeshOutput();
partData.ClearGeneratedVolumeOutput();
}
partData.Initialize(session, partID, GeoID, _containerObjectNode.ObjectID, this, ref partInfo,
HEU_PartData.PartOutputType.INSTANCER, isPartEditable, _containerObjectNode.IsInstancer(), isAttribInstancer);
SetupGameObjectAndTransform(partData, parentAsset);
}
else if (HEU_HAPIUtility.IsSupportedPolygonType(partInfo.type))
{
if (partData == null)
{
partData = ScriptableObject.CreateInstance <HEU_PartData>();
}
else
{
// Clear volume data (case where switching from something other output to mesh)
partData.ClearGeneratedVolumeOutput();
}
partData.Initialize(session, partID, GeoID, _containerObjectNode.ObjectID, this, ref partInfo,
HEU_PartData.PartOutputType.MESH, isPartEditable, _containerObjectNode.IsInstancer(), false);
// This check allows to ignore editable non-display nodes by default, but commented out to allow
// them for now. Users can also ignore them by turning on IgnoreNonDisplayNodes
//if (Displayable || (Editable && ParentAsset.EditableNodesToolsEnabled))
{
SetupGameObjectAndTransform(partData, parentAsset);
}
}
else
{
Debug.LogWarningFormat("Unsupported part type {0}", partInfo.type);
}
if (partData != null)
{
// Success!
_parts.Add(partData);
// Set unique name for the part
string partName = HEU_PluginSettings.UseFullPathNamesForOutput ? GeneratePartFullName(partData.PartName) : partData.PartName;
partData.SetGameObjectName(partName);
// For intermediate or default-type editable nodes, setup the HEU_AttributeStore
if (isPartEditable)
{
partData.SyncAttributesStore(session, _geoInfo.nodeId, ref partInfo);
}
else
{
// Remove attributes store if it has it
partData.DestroyAttributesStore();
}
}
}
#if HEU_PROFILER_ON
Debug.LogFormat("PART PROCESS TIME:: NAME={0}, TIME={1}", HEU_SessionManager.GetString(partInfo.nameSH, session), (Time.realtimeSinceStartup - processPartStartTime));
#endif
}
public static bool GenerateTerrainFromVolume(HEU_SessionBase session, ref HAPI_VolumeInfo volumeInfo, HAPI_NodeId geoID, HAPI_PartId partID,
GameObject gameObject, out TerrainData terrainData, out Vector3 volumePositionOffset)
{
terrainData = null;
volumePositionOffset = Vector3.zero;
if (volumeInfo.zLength == 1 && volumeInfo.tupleSize == 1)
{
// Heightfields will be converted to terrain in Unity.
// Unity requires terrainData.heightmapResolution to be square power of two plus 1 (eg. 513, 257, 129, 65).
// Houdini gives volumeInfo.xLength and volumeInfo.yLength which are the number of height values per dimension.
// Note that volumeInfo.xLength and volumeInfo.yLength is equal to Houdini heightfield size / grid spacing.
// The heightfield grid spacing is given as volumeTransformMatrix.scale but divided by 2 (grid spacing / 2 = volumeTransformMatrix.scale).
// Number of heightfield values
int totalHeightValues = volumeInfo.xLength * volumeInfo.yLength;
// Use the volumeInfo.transform to get the actual heightfield position and size.
Matrix4x4 volumeTransformMatrix = HEU_HAPIUtility.GetMatrixFromHAPITransform(ref volumeInfo.transform, false);
Vector3 position = HEU_HAPIUtility.GetPosition(ref volumeTransformMatrix);
Vector3 scale = HEU_HAPIUtility.GetScale(ref volumeTransformMatrix);
// The scaled size is the real world size of the terrain in both Houdini and Unity.
// Unity terrain uses this to scale up the height values we set.
int scaledSizeX = Mathf.RoundToInt(volumeInfo.xLength * scale.x) * 2;
int scaledSizeZ = Mathf.RoundToInt(volumeInfo.yLength * scale.z) * 2;
//Debug.LogFormat("HeightField Pos:{0}, Scale:{1}", position, scale);
//Debug.LogFormat("HeightField tileSize:{0}, xLength:{1}, yLength:{2}", volumeInfo.tileSize, volumeInfo.xLength, volumeInfo.yLength);
//Debug.LogFormat("HeightField Scaled Size x:{0}, y:{1}", scaledSizeX, scaledSizeZ);
//Debug.LogFormat("HeightField minX={0}, minY={1}, minZ={2}", volumeInfo.minX, volumeInfo.minY, volumeInfo.minZ);
const int UNITY_MINIMUM_HEIGHTMAP_RESOLUTION = 33;
if (scaledSizeX < UNITY_MINIMUM_HEIGHTMAP_RESOLUTION || scaledSizeZ < UNITY_MINIMUM_HEIGHTMAP_RESOLUTION)
{
Debug.LogWarningFormat("Unity Terrain has a minimum heightmap resolution of {0}. This HDA heightmap size is {1}x{2}."
+ "\nPlease resize the terrain to a value higher than this.",
UNITY_MINIMUM_HEIGHTMAP_RESOLUTION, scaledSizeX, scaledSizeZ);
return false;
}
int mapWidth = volumeInfo.xLength;
int mapHeight = volumeInfo.yLength;
// Unity terrain requires (though not strictly) a square size that is power of two plus one,
// so we calculate that from the given volumeInfo.xLength and volumeInfo.yLength.
int squareSizePlusOne = mapWidth >= mapHeight ? mapWidth : mapHeight;
if (!Mathf.IsPowerOfTwo(squareSizePlusOne - 1))
{
squareSizePlusOne = Mathf.NextPowerOfTwo(squareSizePlusOne - 1) + 1;
}
//Debug.LogFormat("MAPHEIGHT: {0}, SQUARE: {1}", mapHeight, squareSize);
// If our valid square size is greater than half than the scaled true size, then the mapping will need
// extra padding since we need to go up to the next power of two plus one.
if ((squareSizePlusOne * 2) > scaledSizeX || (squareSizePlusOne * 2) > scaledSizeZ)
{
Debug.LogWarningFormat("The specified heightfield size will require extra padding when converting heightfield to terrain due to Houdini to Unity size differences!"
+ "\nRecommended to use heightfield size that is power of two plus two (eg. 514, 258, 130, 66).");
scaledSizeX = Mathf.RoundToInt(squareSizePlusOne * scale.x) * 2;
scaledSizeZ = Mathf.RoundToInt(squareSizePlusOne * scale.z) * 2;
}
// Get the height values from Houdini and find the min and max height range.
float[] heightValues = new float[totalHeightValues];
bool bResult = session.GetHeightFieldData(geoID, partID, heightValues, 0, totalHeightValues);
if (!bResult)
{
return false;
}
float minHeight = heightValues[0];
float maxHeight = minHeight;
for (int i = 0; i < totalHeightValues; ++i)
{
float f = heightValues[i];
if (f > maxHeight)
{
maxHeight = f;
}
else if (f < minHeight)
{
minHeight = f;
}
}
const int UNITY_MAX_HEIGHT_RANGE = 65536;
float heightRange = (maxHeight - minHeight);
if (Mathf.RoundToInt(heightRange) > UNITY_MAX_HEIGHT_RANGE)
{
Debug.LogWarningFormat("Unity Terrain has maximum height range of {0}. This HDA height range is {1}, so it will be maxed out at {0}.\nPlease resize to within valid range!",
UNITY_MAX_HEIGHT_RANGE, Mathf.RoundToInt(heightRange));
heightRange = UNITY_MAX_HEIGHT_RANGE;
}
int paddingWidth = squareSizePlusOne - mapWidth;
int paddingLeft = Mathf.CeilToInt(paddingWidth * 0.5f);
int paddingRight = squareSizePlusOne - paddingLeft;
//Debug.LogFormat("Padding: Width={0}, Left={1}, Right={2}", paddingWidth, paddingLeft, paddingRight);
int paddingHeight = squareSizePlusOne - mapHeight;
int paddingTop = Mathf.CeilToInt(paddingHeight * 0.5f);
int paddingBottom = squareSizePlusOne - paddingTop;
//Debug.LogFormat("Padding: Height={0}, Top={1}, Bottom={2}", paddingHeight, paddingTop, paddingBottom);
// Set height values at centre of the terrain, with padding on the sides if we resized
float[,] unityHeights = new float[squareSizePlusOne, squareSizePlusOne];
for (int y = 0; y < squareSizePlusOne; ++y)
{
for (int x = 0; x < squareSizePlusOne; ++x)
{
if (y >= paddingTop && y < (paddingBottom) && x >= paddingLeft && x < (paddingRight))
{
int ay = x - paddingLeft;
int ax = y - paddingTop;
// Unity expects normalized height values
float h = heightValues[ay + ax * mapWidth] - minHeight;
float f = h / heightRange;
// Flip for right-hand to left-handed coordinate system
int ix = x;
int iy = squareSizePlusOne - (y + 1);
// Unity expects height array indexing to be [y, x].
unityHeights[ix, iy] = f;
}
}
}
terrainData = new TerrainData();
// Heightmap resolution must be square power-of-two plus 1
terrainData.heightmapResolution = squareSizePlusOne;
// TODO: Pull these from plugin settings perhaps?
terrainData.baseMapResolution = 1024;
terrainData.alphamapResolution = 1024;
int detailResolution = squareSizePlusOne - 1;
// 128 is the maximum for resolutionPerPatch
const int resolutionPerPatch = 128;
terrainData.SetDetailResolution(detailResolution, resolutionPerPatch);
// Note SetHeights must be called before setting size in next line, as otherwise
// the internal terrain size will not change after setting the size.
terrainData.SetHeights(0, 0, unityHeights);
terrainData.size = new Vector3(scaledSizeX, heightRange, scaledSizeZ);
Terrain terrain = HEU_GeneralUtility.GetOrCreateComponent<Terrain>(gameObject);
TerrainCollider collider = HEU_GeneralUtility.GetOrCreateComponent<TerrainCollider>(gameObject);
terrain.terrainData = terrainData;
collider.terrainData = terrainData;
terrain.Flush();
// Unity Terrain has origin at bottom left, whereas
// Houdini uses centre of terrain. We'll need to move the terrain half way back in X and half way up in Z
// TODO: revisit to properly get volume position offset when splitting tiles
float xmin, xmax, zmin, zmax, ymin, ymax, xcenter, ycenter, zcenter;
session.GetVolumeBounds(geoID, partID, out xmin, out ymin, out zmin, out xmax, out ymax, out zmax, out xcenter,
out ycenter, out zcenter);
//Debug.LogFormat("xmin: {0}, xmax: {1}, ymin: {2}, ymax: {3}, zmin: {4}, zmax: {5}, xc: {6}, yc: {7}, zc: {8}",
// xmin, xmax, ymin, ymax, zmin, zmax, xcenter, ycenter, zcenter);
// Offset position is based on size of heightfield
float offsetX = (float)squareSizePlusOne / (float)mapWidth;
float offsetZ = (float)squareSizePlusOne / (float)mapHeight;
volumePositionOffset = new Vector3(-position.x * offsetX, minHeight + position.y, position.z * offsetZ);
return true;
}
else
{
Debug.LogWarning("Non-heightfield volume type not supported!");
}
return false;
}
/// <summary>
/// Retrieves the height values from Houdini for the given volume part.
/// </summary>
public static float[] GetHeightfieldFromPart(HEU_SessionBase session, HAPI_NodeId geoID, HAPI_PartId partID, string partName, int terrainSize)
{
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bool bResult = session.GetVolumeInfo(geoID, partID, ref volumeInfo);
if (!bResult)
{
return null;
}
int volumeXLength = volumeInfo.xLength;
int volumeYLength = volumeInfo.yLength;
// Number of heightfield values
int totalHeightValues = volumeXLength * volumeYLength;
float minHeight = float.MaxValue;
float maxHeight = float.MinValue;
float[] heightValues = new float[totalHeightValues];
if (!GetHeightfieldValues(session, volumeXLength, volumeYLength, geoID, partID, ref heightValues, ref minHeight, ref maxHeight))
{
return null;
}
float heightRange = (maxHeight - minHeight);
if (heightRange == 0f)
{
heightRange = 1f;
}
//Debug.LogFormat("{0} : {1}", HEU_SessionManager.GetString(volumeInfo.nameSH, session), heightRange);
// Remap height values to fit terrain size
int paddingWidth = terrainSize - volumeXLength;
int paddingLeft = Mathf.CeilToInt(paddingWidth * 0.5f);
int paddingRight = terrainSize - paddingLeft;
//Debug.LogFormat("Padding: Width={0}, Left={1}, Right={2}", paddingWidth, paddingLeft, paddingRight);
int paddingHeight = terrainSize - volumeYLength;
int paddingTop = Mathf.CeilToInt(paddingHeight * 0.5f);
int paddingBottom = terrainSize - paddingTop;
//Debug.LogFormat("Padding: Height={0}, Top={1}, Bottom={2}", paddingHeight, paddingTop, paddingBottom);
// Set height values at centre of the terrain, with padding on the sides if we resized
float[] resizedHeightValues = new float[terrainSize * terrainSize];
for (int y = 0; y < terrainSize; ++y)
{
for (int x = 0; x < terrainSize; ++x)
{
if (y >= paddingTop && y < (paddingBottom) && x >= paddingLeft && x < (paddingRight))
{
int ay = x - paddingLeft;
int ax = y - paddingTop;
float f = heightValues[ay + ax * volumeXLength] - minHeight;
f /= heightRange;
// Flip for right-hand to left-handed coordinate system
int ix = x;
int iy = terrainSize - (y + 1);
// Unity expects height array indexing to be [y, x].
resizedHeightValues[iy + ix * terrainSize] = f;
}
}
}
return resizedHeightValues;
}
/// <summary>
/// Process the part at the given index, creating its data (geometry),
/// and adding it to the list of parts.
/// </summary>
/// <param name="session"></param>
/// <param name="partID"></param>
/// <returns>A valid HEU_PartData if it has been successfully processed.</returns>
private void ProcessPart(HEU_SessionBase session, int partID, ref HAPI_PartInfo partInfo, ref HEU_PartData partData)
{
HEU_HoudiniAsset parentAsset = ParentAsset;
bool bResult = true;
//Debug.LogFormat("Part: name={0}, id={1}, type={2}, instanced={3}, instance count={4}, instance part count={5}", HEU_SessionManager.GetString(partInfo.nameSH, session), partID, partInfo.type, partInfo.isInstanced, partInfo.instanceCount, partInfo.instancedPartCount);
#if HEU_PROFILER_ON
float processPartStartTime = Time.realtimeSinceStartup;
#endif
bool isPartEditable = IsIntermediateOrEditable();
if (IsGeoInputType())
{
// Setup for input node to accept inputs
if (_inputNode == null)
{
string partName = HEU_SessionManager.GetString(partInfo.nameSH, session);
_inputNode = HEU_InputNode.CreateSetupInput(GeoID, 0, partName, HEU_InputNode.InputNodeType.NODE, ParentAsset);
if (_inputNode != null)
{
ParentAsset.AddInputNode(_inputNode);
}
}
if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_MESH && partInfo.vertexCount == 0)
{
// No geometry for input asset
if (partData != null)
{
// Clean up existing part
HEU_PartData.DestroyPart(partData);
partData = null;
}
// No need to process further since we don't have geometry
return;
}
}
if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_INVALID)
{
// Clean up invalid parts
if (partData != null)
{
HEU_PartData.DestroyPart(partData);
partData = null;
}
}
else if (partInfo.type < HAPI_PartType.HAPI_PARTTYPE_MAX)
{
// Process the part based on type. Keep or ignore.
// We treat parts of type curve as curves, along with geo nodes that are editable and type curves
if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_CURVE)
{
if (partData == null)
{
partData = ScriptableObject.CreateInstance <HEU_PartData>();
}
partData.Initialize(session, partID, GeoID, _containerObjectNode.ObjectID, this, ref partInfo, HEU_PartData.PartOutputType.CURVE, isPartEditable);
SetupGameObjectAndTransform(partData, parentAsset);
partData.ProcessCurvePart(session);
}
else if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_VOLUME)
{
// We only process "height" volume parts. Other volume parts are ignored for now.
#if TERRAIN_SUPPORTED
HAPI_VolumeInfo volumeInfo = new HAPI_VolumeInfo();
bResult = session.GetVolumeInfo(GeoID, partID, ref volumeInfo);
if (!bResult)
{
Debug.LogErrorFormat("Unable to get volume info for geo node {0} and part {1} ", GeoID, partID);
}
else
{
if (Displayable && !IsIntermediateOrEditable())
{
if (partData == null)
{
partData = ScriptableObject.CreateInstance <HEU_PartData>();
}
partData.Initialize(session, partID, GeoID, _containerObjectNode.ObjectID, this, ref partInfo, HEU_PartData.PartOutputType.VOLUME, isPartEditable);
SetupGameObjectAndTransform(partData, ParentAsset);
}
}
#else
Debug.LogWarningFormat("Terrain (heightfield volume) is not yet supported.");
#endif
}
else if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_MESH)
{
if (partData == null)
{
partData = ScriptableObject.CreateInstance <HEU_PartData>();
}
partData.Initialize(session, partID, GeoID, _containerObjectNode.ObjectID, this, ref partInfo, HEU_PartData.PartOutputType.MESH, isPartEditable);
SetupGameObjectAndTransform(partData, parentAsset);
}
else if (partInfo.type == HAPI_PartType.HAPI_PARTTYPE_INSTANCER)
{
if (partData == null)
{
partData = ScriptableObject.CreateInstance <HEU_PartData>();
}
partData.Initialize(session, partID, GeoID, _containerObjectNode.ObjectID, this, ref partInfo, HEU_PartData.PartOutputType.INSTANCER, isPartEditable);
SetupGameObjectAndTransform(partData, parentAsset);
}
else
{
Debug.LogWarningFormat("Unsupported part type {0}", partInfo.type);
}
if (partData != null)
{
// Success!
_parts.Add(partData);
// Set unique name for the part
string partFullName = GeneratePartFullName(partData.PartName);
partFullName = HEU_EditorUtility.GetUniqueNameForSibling(ParentAsset.RootGameObject.transform, partFullName);
partData.SetGameObjectName(partFullName);
// For intermediate or default-type editable nodes, setup the HEU_AttributeStore
if (isPartEditable)
{
partData.SyncAttributesStore(session, _geoInfo.nodeId, ref partInfo);
}
else
{
// Remove attributes store if it has it
partData.DestroyAttributesStore();
}
HEU_GeneralUtility.AssignUnityTag(session, GeoID, partData.PartID, partData._gameObject);
HEU_GeneralUtility.MakeStaticIfHasAttribute(session, GeoID, partData.PartID, partData._gameObject);
}
}
#if HEU_PROFILER_ON
Debug.LogFormat("PART PROCESS TIME:: NAME={0}, TIME={1}", HEU_SessionManager.GetString(partInfo.nameSH, session), (Time.realtimeSinceStartup - processPartStartTime));
#endif
}
