public static void ReadTerrainTextures(Terrain terrain, IntPtr terrainHandle, Collector collector, string cacheLocation = null)
{
TerrainData tData = terrain.terrainData;
IntPtr matHandle = terrainGetMaterial(terrainHandle);
int texCount = terrainGetLayerCount(terrainHandle);
TerrainLayer[] layers = new TerrainLayer[texCount];
float[,,] alphamaps = null;
for (int i = 0; i < texCount; ++i)
{
// Distribution
string distribTex = materialGetCustomMap(matHandle, "distribution" + i);
IntPtr distribHandle = collector.GetTerrainHandle(distribTex);
if (distribHandle != IntPtr.Zero)
{
int distribRes = terrainGetResolution(distribHandle);
if (alphamaps == null)
{
alphamaps = new float[distribRes, distribRes, texCount];
tData.alphamapResolution = distribRes;
}
float[,] alphamap = new float[distribRes, distribRes];
readTerrain(distribHandle, alphamap, false);
// TODO find more elegant way to copy data (direct copy from C++, use of Array.Copy...)
for (int x = 0; x < distribRes; ++x)
{
for (int y = 0; y < distribRes; ++y)
{
alphamaps[x, y, i] = alphamap[y, x];
for (int j = 0; j < i; ++j)
{
alphamaps[x, y, j] *= 1 - alphamap[y, x];
}
}
}
}
// Texture
string layerTex = materialGetCustomMap(matHandle, "texture" + i);
#if UNITY_EDITOR
if (cacheLocation == null)
{
#endif
layers[i] = new TerrainLayer
{
diffuseTexture = collector.GetTexture(layerTex)
}
;
#if UNITY_EDITOR
}
else
{
AssetDatabase.Refresh();
string texPath = cacheLocation + layerTex + ".png";
Texture2D tex = (Texture2D)AssetDatabase.LoadAssetAtPath(texPath, typeof(Texture2D));
layers[i] = new TerrainLayer
{
diffuseTexture = tex
};
}
#endif
}
if (texCount != 0)
{
tData.terrainLayers = layers;
tData.SetAlphamaps(0, 0, alphamaps);
}
}
