/// <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);
}
//HEU_Logger.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))
{
//HEU_Logger.Log("Mask layer found! Skipping creating the HF.");
bMaskSet = true;
bMaskLayer = true;
alphaLayerID = idt._maskNodeID;
float[,] heights = idt._terrainData.GetHeights(0, 0, idt._terrainData.heightmapResolution, idt._terrainData.heightmapResolution);
int heightsSizeX = heights.GetLength(0);
int heightsSizeY = heights.GetLength(1);
alphaMapsConverted[m] = HEU_TerrainUtility.ResampleData(alphaMapsConverted[m], sizeX, sizeY, heightsSizeX, heightsSizeY);
}
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;
HEU_Logger.LogError("Failed to create input volume node for layer " + layerName);
break;
}
}
//HEU_Logger.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;
HEU_Logger.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;
HEU_Logger.LogError("Unable to connect new volume node for layer " + layerName);
break;
}
inputLayerIndex++;
}
}
return(bResult);
}
/// <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);
}