public static void UpdateCombinerCache(TerrainCombiner combiner)
{
TerrainData terrainData = combiner.GetComponent <Terrain>().terrainData;
// Update target materials from sources
List <TerrainLayer> targetMatList = new List <TerrainLayer>();
for (int i = 0; i < combiner.Instances.Length; i++)
{
TerrainCombinerInstance sourceData = combiner.Instances[i];
if (sourceData.source == null)
{
continue;
}
Terrain sourceTerrain = sourceData.source.GetComponent <Terrain>();
foreach (var terrainLayer in sourceTerrain.terrainData.terrainLayers)
{
if (terrainLayer.diffuseTexture == null)
{
continue;
}
// If splay use alpha material it should not be added to target
if (sourceData.source.alphaMaterial != null && terrainLayer == sourceData.source.alphaMaterial)
{
continue;
}
int index = TCMaterialHelper.GetLayerIndex(targetMatList.ToArray(), terrainLayer);
if (index == -1)
{
targetMatList.Add(terrainLayer);
}
}
}
terrainData.terrainLayers = targetMatList.ToArray();
// TODO: release ??
combiner.MaterialCache.RenderTextures.Clear();
int size = terrainData.alphamapResolution;
int targetLayerCount = terrainData.alphamapLayers;
for (int i = 0; i < targetLayerCount; i++)
{
RenderTexture renderTexture = TCGraphicsHelper.CreateRenderTarget(size);
combiner.MaterialCache.RenderTextures.Add(renderTexture);
}
combiner.MaterialCache.Texture = TCGraphicsHelper.CreateTexture(size);
combiner.MaterialCache.ResultData = new float[size, size, terrainData.alphamapLayers];
}
