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 detailResolution = 0;
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);
HFLayerType layerType = HEU_TerrainUtility.GetHeightfieldLayerType(session, nodeID, volumeParts[i].id, volumeName);
//Debug.LogFormat("Index: {0}, Part id: {1}, Part Name: {2}, Volume Name: {3}", i, volumeParts[i].id, HEU_SessionManager.GetString(volumeParts[i].nameSH), volumeName);
// Ignoring mask layer because it is Houdini-specific (same behaviour as regular HDA terrain generation)
if (layerType == HFLayerType.MASK)
{
continue;
}
HEU_LoadBufferVolumeLayer layer = new HEU_LoadBufferVolumeLayer();
layer._layerName = volumeName;
layer._partID = volumeParts[i].id;
layer._heightMapWidth = volumeInfo.xLength;
layer._heightMapHeight = volumeInfo.yLength;
layer._layerType = layerType;
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);
if (layerType != HFLayerType.DETAIL)
{
layer._hasLayerAttributes = HEU_TerrainUtility.VolumeLayerHasAttributes(session, nodeID, volumeParts[i].id);
if (layer._hasLayerAttributes)
{
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,
(layerType == HFLayerType.HEIGHT));
}
// 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 (layerType == HFLayerType.HEIGHT)
{
// Height layer always first layer
volumeBuffer._splatLayers.Insert(0, layer);
volumeBuffer._heightMapWidth = layer._heightMapWidth;
volumeBuffer._heightMapHeight = layer._heightMapHeight;
volumeBuffer._terrainSizeX = layer._terrainSizeX;
volumeBuffer._terrainSizeY = layer._terrainSizeY;
volumeBuffer._heightRange = layer._heightRange;
// The terrain heightfield position in y requires offset of min height
layer._position.y += layer._minHeight;
// Use y position from attribute if user has set it
float userYPos;
if (HEU_GeneralUtility.GetAttributeFloatSingle(session, nodeID, volumeParts[i].id,
HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_YPOS, out userYPos))
{
layer._position.y = userYPos;
}
// 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);
// Look up TerrainData export file path via attribute if user has set it
volumeBuffer._terrainDataExportPath = HEU_GeneralUtility.GetAttributeStringValueSingle(session, nodeID, volumeBuffer._id,
HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TERRAINDATA_EXPORT_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;
}
HEU_TerrainUtility.PopulateDetailProperties(session, nodeID,
volumeBuffer._id, ref volumeBuffer._detailProperties);
// Get specified material if any
volumeBuffer._specifiedTerrainMaterialName = HEU_GeneralUtility.GetMaterialAttributeValueFromPart(session,
nodeID, volumeBuffer._id);
}
else if(layer._layerType == HFLayerType.DETAIL)
{
// Get detail prototype
HEU_DetailPrototype detailPrototype = null;
HEU_TerrainUtility.PopulateDetailPrototype(session, nodeID, volumeParts[i].id, ref detailPrototype);
int[,] detailMap = HEU_TerrainUtility.GetDetailMapFromPart(session, nodeID,
volumeParts[i].id, out detailResolution);
volumeBuffer._detailPrototypes.Add(detailPrototype);
volumeBuffer._detailMaps.Add(detailMap);
// Set the detail resolution which is formed from the detail layer
if (volumeBuffer._detailProperties == null)
{
volumeBuffer._detailProperties = new HEU_DetailProperties();
}
volumeBuffer._detailProperties._detailResolution = detailResolution;
}
else
{
volumeBuffer._splatLayers.Add(layer);
}
}
Sleep();
}
// Each volume buffer is a self contained terrain tile
foreach(HEU_LoadBufferVolume volumeBuffer in volumeBuffers)
{
List<HEU_LoadBufferVolumeLayer> layers = volumeBuffer._splatLayers;
//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)
{
// Ignore Detail layers as they are handled differently
if(layers[m]._layerType != HFLayerType.DETAIL)
{
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;
}
// TODO: revisit how the position is calculated
volumeBuffer._position = new Vector3(
volumeBuffer._terrainSizeX + volumeBuffer._splatLayers[0]._minBounds.x,
volumeBuffer._splatLayers[0]._position.y,
volumeBuffer._splatLayers[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))
{
// Try part 0 (the height layer) to get the tile index.
// For scatter points merged with HF, in some cases the part ID doesn't have the tile attribute.
HEU_GeneralUtility.GetAttribute(session, nodeID, 0, 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.PopulateScatterTrees(session, nodeID, scatterInstancerParts[i].id, scatterInstancerParts[i].pointCount, ref volumeBuffer._scatterTrees);
}
return true;
}
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 export file path via attribute if user has set it
string userTerrainDataExportPath = HEU_GeneralUtility.GetAttributeStringValueSingle(session, _ownerNode.GeoID, heightLayer._part.PartID,
HEU_Defines.DEFAULT_UNITY_HEIGHTFIELD_TERRAINDATA_EXPORT_FILE_ATTR, HAPI_AttributeOwner.HAPI_ATTROWNER_PRIM);
// 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.
if (!string.IsNullOrEmpty(userTerrainDataExportPath))
{
// Save it to explicit path specified by user
terrainData = HEU_AssetDatabase.CopyAndLoadAssetAtGivenPath(loadedTerrainData, userTerrainDataExportPath, typeof(TerrainData)) as TerrainData;
}
else
{
// Save it into cache
// Note that this overwrites existing TerrainData in our cache because the workflow is
// such that attributes will always override local setting.
string bakedTerrainPath = HEU_Platform.BuildPath(houdiniAsset.GetValidAssetCacheFolderPath(), 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);
}
}
}
}
Terrain terrain = null;
// 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,
ref terrain);
if (!bResult || terrainData == null)
{
return;
}
if (_terrainData != terrainData)
{
_terrainData = terrainData;
heightLayer._part.SetTerrainData(terrainData, relativeFolderPath, userTerrainDataExportPath);
}
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[]> normalizedHeightfields = new List<float[]>();
// Corresponding list of HF volume layers to process as splatmaps
List<HEU_VolumeLayer> terrainLayersToProcess = new List<HEU_VolumeLayer>();
List<int[,]> convertedDetailMaps = new List<int[,]>();
List<HEU_DetailPrototype> detailPrototypes = new List<HEU_DetailPrototype>();
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.
// The layers are normalized and split into detail and terrain layers.
for (int i = 1; i < numLayers; ++i)
{
if (_layers[i]._layerType == HFLayerType.DETAIL)
{
if (_detailProperties == null)
{
_detailProperties = new HEU_DetailProperties();
}
// Convert to detail map, and add to list to set later
int[,] normalizedDetail = HEU_TerrainUtility.GetDetailMapFromPart(
session, _ownerNode.GeoID, _layers[i]._part.PartID, out _detailProperties._detailResolution);
if (normalizedDetail != null && normalizedDetail.Length > 0)
{
convertedDetailMaps.Add(normalizedDetail);
detailPrototypes.Add(_layers[i]._detailPrototype);
}
}
else
{
// Convert to normalized heightfield
float[] normalizedHF = HEU_TerrainUtility.GetNormalizedHeightmapFromPartWithMinMax(
session, _ownerNode.GeoID, _layers[i]._part.PartID, _layers[i]._xLength,
_layers[i]._yLength, ref minHeight, ref maxHeight, ref heightRange, false);
if (normalizedHF != null && normalizedHF.Length > 0)
{
normalizedHeightfields.Add(normalizedHF);
terrainLayersToProcess.Add(_layers[i]);
}
}
}
int numTerrainLayersToProcess = terrainLayersToProcess.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 < numTerrainLayersToProcess; ++m)
{
bNewTerrainLayer = false;
bSetTerrainLayerProperties = true;
layer = terrainLayersToProcess[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 < numTerrainLayersToProcess; ++m)
{
bNewSplat = false;
layer = terrainLayersToProcess[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 && terrainLayersToProcess.Count > 0)
{
// Convert the heightfields into alpha maps with layer strengths
float[] strengths = new float[terrainLayersToProcess.Count];
for (int m = 0; m < terrainLayersToProcess.Count; ++m)
{
strengths[m] = terrainLayersToProcess[m]._strength;
}
alphamap = HEU_TerrainUtility.AppendConvertedHeightFieldToAlphaMap(
terrainLayersToProcess[0]._xLength, terrainLayersToProcess[0]._yLength, existingAlphaMaps,
normalizedHeightfields, 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 = terrainLayersToProcess[0]._xLength;
terrainData.alphamapResolution = alphamapResolution;
terrainData.SetAlphamaps(0, 0, alphamap);
}
// Scattering - trees and details
HEU_TerrainUtility.ApplyScatterTrees(terrainData, _scatterTrees);
HEU_TerrainUtility.ApplyDetailLayers(terrain, terrainData, _detailProperties, detailPrototypes, convertedDetailMaps);
// 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();
}
