public GrassDataLayer(GrassDataLayer gdl)
{
usePrototypeMesh = gdl.usePrototypeMesh;
detailTexture = gdl.detailTexture;
detailMesh = gdl.detailMesh;
detailCountPerDetailPixel = gdl.detailCountPerDetailPixel;
minSpawnH = gdl.minSpawnH;
maxSpawnH = gdl.maxSpawnH;
minSlope = gdl.minSlope;
maxSlope = gdl.maxSlope;
perlinTreshold = gdl.perlinTreshold;
inverse = gdl.inverse;
frequency = gdl.frequency;
seed = gdl.seed;
disable = gdl.disable;
detailTexturePath = gdl.detailTexturePath;
detailMeshPath = gdl.detailMeshPath;
details = new DetailPrototypeCustom(gdl.details);
}
public void GenerateGrass(Chunk chunk)
{
int alphamapWidth = chunk.chunkTerrain.terrainData.alphamapWidth;
int alphamapHeight = chunk.chunkTerrain.terrainData.alphamapHeight;
int detailWidth = chunk.chunkTerrain.terrainData.detailResolution;
int detailHeight = detailWidth;
float resolutionDiffFactor = (float)alphamapWidth / detailWidth;
DetailPrototype[] details = new DetailPrototype[grassLayers.Count];
for (int i = 0; i < grassLayers.Count; ++i)
{
details[i] = new DetailPrototype();
details[i].usePrototypeMesh = grassLayers[i].usePrototypeMesh;
if (details[i].usePrototypeMesh)
{
details[i].prototype = grassLayers[i].detailMesh;
details[i].renderMode = DetailRenderMode.Grass;
}
else
{
details[i].prototypeTexture = grassLayers[i].detailTexture;
details[i].renderMode = DetailRenderMode.GrassBillboard;
}
details[i].minHeight = grassLayers[i].details.minHeight;
details[i].maxHeight = grassLayers[i].details.maxHeight;
details[i].minWidth = grassLayers[i].details.minWidth;
details[i].maxWidth = grassLayers[i].details.maxWidth;
details[i].dryColor = grassLayers[i].details.dryColor;
details[i].healthyColor = grassLayers[i].details.healthyColor;
}
chunk.chunkTerrain.terrainData.detailPrototypes = details;
float[, ,] splatmap = chunk.chunkTerrain.terrainData.GetAlphamaps(0, 0, alphamapWidth, alphamapHeight);
UnityEditor.Undo.RegisterCompleteObjectUndo(chunk.chunkTerrain.terrainData, "Grass");
for (int i = 0; i < grassLayers.Count; ++i)
{
GrassDataLayer grassLayer = grassLayers[i];
if (grassLayer.disable == true)
{
continue;
}
int[,] newDetailLayer = new int[detailWidth, detailHeight];
float seedX = grassLayer.seed + chunk.pos.x;
float seedY = grassLayer.seed + chunk.pos.y;
for (int j = 0; j < detailWidth; j++)
{
float nj = (float)j / (float)detailWidth;
for (int k = 0; k < detailHeight; k++)
{
float nk = (float)k / (float)detailHeight;
float height = chunk.chunkTerrain.terrainData.GetInterpolatedHeight(nk, nj);
float steepness = chunk.chunkTerrain.terrainData.GetSteepness(nk, nj);
if (height < grassLayer.minSpawnH || height > grassLayer.maxSpawnH)
{
continue;
}
if (steepness < grassLayer.minSlope || steepness > grassLayer.maxSlope)
{
continue;
}
float perlin = Mathf.PerlinNoise((seedX + nk) * grassLayer.frequency, (seedY + nj) * grassLayer.frequency);
if (grassLayer.inverse ? perlin >= grassLayer.perlinTreshold : perlin < grassLayer.perlinTreshold)
{
continue;
}
float alphaValue = splatmap[(int)(resolutionDiffFactor * j), (int)(resolutionDiffFactor * k), 0];
newDetailLayer[j, k] = (int)Mathf.Round(alphaValue * ((float)grassLayer.detailCountPerDetailPixel)) + newDetailLayer[j, k];
}
}
chunk.chunkTerrain.terrainData.SetDetailLayer(0, 0, i, newDetailLayer);
}
}