void PrepareTextures(ApplyTextures target, TerrainData terrainData)
{
List <SplatPrototype> list = new List <SplatPrototype>();
SplatPrototype sp = new SplatPrototype();
sp.texture = target.steepLowTexture;
sp.tileSize = Vector2.one * 15;
list.Add(sp);
sp = new SplatPrototype();
sp.texture = target.lowTexture;
sp.tileSize = Vector2.one * 15;
list.Add(sp);
sp = new SplatPrototype();
sp.texture = target.steepMedTexture;
sp.tileSize = Vector2.one * 15;
list.Add(sp);
sp = new SplatPrototype();
sp.texture = target.medTexture;
sp.tileSize = Vector2.one * 15;
list.Add(sp);
sp = new SplatPrototype();
sp.texture = target.steepHigTexture;
sp.tileSize = Vector2.one * 15;
list.Add(sp);
sp = new SplatPrototype();
sp.texture = target.higTexture;
sp.tileSize = Vector2.one * 15;
list.Add(sp);
sp = new SplatPrototype();
sp.texture = target.variation1;
sp.tileSize = Vector2.one * 15;
list.Add(sp);
terrainData.splatPrototypes = list.ToArray();
}
void Apply(ApplyTextures target)
{
Terrain terra = target.GetComponent <Terrain>();
float steepness = 0;
float height = 0;
PrepareTextures(target, terra.terrainData);
float[,,] map = new float[terra.terrainData.alphamapWidth, terra.terrainData.alphamapHeight, 7];
float[,] heights = terra.terrainData.GetHeights(0, 0, terra.terrainData.heightmapResolution, terra.terrainData.heightmapResolution);
float maxHeight = 0;
float minHeight = float.MaxValue;
for (int y = 0; y < heights.GetLength(0); y++)
{
for (int x = 0; x < heights.GetLength(1); x++)
{
maxHeight = Mathf.Max(maxHeight, heights[x, y]);
minHeight = Mathf.Min(minHeight, heights[x, y]);
}
}
for (int y = 0; y < terra.terrainData.alphamapWidth; y++)
{
for (int x = 0; x < terra.terrainData.alphamapWidth; x++)
{
float normX = x * 1.0f / (terra.terrainData.alphamapWidth - 1);
float normY = y * 1.0f / (terra.terrainData.alphamapHeight - 1);
steepness = terra.terrainData.GetSteepness(normY, normX);
height = heights[(int)(normX * (terra.terrainData.heightmapResolution - 1)), (int)(normY * (terra.terrainData.heightmapResolution - 1))];
height = (height - minHeight) / (maxHeight - minHeight);
float steepfrag = Mathf.Clamp01(target.steepnessCurve.Evaluate(steepness / 90.0f));
//float lowFrag = Mathf.Clamp01(height / target.lowToMedValue);
#pragma warning disable 219
float medFrag = (height - target.lowToMedValue) / (target.medToHighValue - target.lowToMedValue);
float higFrag = (height - target.medToHighValue) / (1 - target.medToHighValue);
#pragma warning restore
// variation
map[x, y, 6] =
target.variationInfluence *
target.variation2.GetPixel(x % target.variation2.width, y % target.variation2.height).r;
map[x, y, 1] = (1 - steepfrag) * Mathf.Clamp01(1 - (height - target.lowToMedValue + 0.1f) / (0.1f));
map[x, y, 3] = (1 - steepfrag) * Mathf.Clamp01((height - target.lowToMedValue + 0.1f) / (0.1f));
map[x, y, 5] = (1 - steepfrag) * Mathf.Clamp01((height - target.medToHighValue + 0.1f) / (0.1f));
if (height > target.lowToMedValue)
{
map[x, y, 3] = (1 - steepfrag) * Mathf.Clamp01(1 - (height - target.medToHighValue + 0.1f) / (0.1f));
}
map[x, y, 0] = steepfrag * Mathf.Clamp01(1 - (height - target.lowToMedValue + 0.1f) / (0.1f));
map[x, y, 2] = steepfrag * Mathf.Clamp01((height - target.lowToMedValue + 0.1f) / (0.1f));
map[x, y, 4] = steepfrag * Mathf.Clamp01((height - target.medToHighValue + 0.1f) / (0.1f));
if (height > target.lowToMedValue)
{
map[x, y, 2] = steepfrag * Mathf.Clamp01(1 - (height - target.medToHighValue + 0.1f) / (0.1f));
}
}
}
terra.terrainData.SetAlphamaps(0, 0, map);
}
