private void GenerateVertexColorAtIndex(Index2D i)
{
Color c = Color.white;
bool isUnderground =
!Utilities.IsInRange(i.X, SurfaceMinIndex.X - 1, SurfaceMaxIndex.X + 1) ||
!Utilities.IsInRange(i.Z, SurfaceMinIndex.Z - 1, SurfaceMaxIndex.Z + 1);
if (isUnderground)
{
c = UndergroundColor;
}
else
{
Vector3 v = vertices[i.Z][i.X];
float heightFraction = Utilities.GetFraction(v.y - BaseHeight, 0, SurfaceMaxHeight);
Color cbh = ColorByHeight.Evaluate(heightFraction);
Vector3 normal = EvaluateNormalAtIndex(i);
float normalDotUp = Vector3.Dot(normal, Vector3.up);
Color cbn = ColorByNormal.Evaluate(normalDotUp);
float blendFraction = ColorBlendFraction.Evaluate(heightFraction).a;
c = Vector4.Lerp(cbh, cbn, blendFraction);
}
int cIndex = To1DIndex(i.X, i.Z);
vertexColors[cIndex] = c;
}
public void UpdateLookupTextures()
{
if (colorByHeightMap != null)
{
Object.DestroyImmediate(colorByHeightMap, true);
}
if (colorByNormalMap != null)
{
Object.DestroyImmediate(colorByNormalMap, true);
}
if (colorBlendMap != null)
{
Object.DestroyImmediate(colorBlendMap, true);
}
int width = 256;
int height = 8;
colorByHeightMap = new Texture2D(width, height, TextureFormat.ARGB32, false, true);
colorByHeightMap.filterMode = FilterMode.Bilinear;
colorByHeightMap.wrapMode = TextureWrapMode.Clamp;
colorByHeightMap.name = COLOR_BY_HEIGHT_MAP_NAME;
colorByNormalMap = new Texture2D(width, height, TextureFormat.ARGB32, false, true);
colorByNormalMap.filterMode = FilterMode.Bilinear;
colorByNormalMap.wrapMode = TextureWrapMode.Clamp;
colorByNormalMap.name = COLOR_BY_NORMAL_MAP_NAME;
colorBlendMap = new Texture2D(width, height, TextureFormat.ARGB32, false, true);
colorBlendMap.filterMode = FilterMode.Bilinear;
colorBlendMap.wrapMode = TextureWrapMode.Clamp;
colorBlendMap.name = COLOR_BLEND_MAP_NAME;
Color[] cbhColors = new Color[width * height];
Color[] cbnColors = new Color[width * height];
Color[] cbColors = new Color[width * height];
for (int x = 0; x < width; ++x)
{
float f = Mathf.InverseLerp(0, width - 1, x);
Color cbh = ColorByHeight.Evaluate(f);
Color cbn = ColorByNormal.Evaluate(f);
Color cb = Color.white * ColorBlendCurve.Evaluate(f);
for (int y = 0; y < height; ++y)
{
int index = GUtilities.To1DIndex(x, y, width);
cbhColors[index] = cbh;
cbnColors[index] = cbn;
cbColors[index] = cb;
}
}
colorByHeightMap.SetPixels(cbhColors);
colorByHeightMap.Apply();
GCommon.TryAddObjectToAsset(colorByHeightMap, TerrainData);
colorByNormalMap.SetPixels(cbnColors);
colorByNormalMap.Apply();
GCommon.TryAddObjectToAsset(colorByNormalMap, TerrainData);
colorBlendMap.SetPixels(cbColors);
colorBlendMap.Apply();
GCommon.TryAddObjectToAsset(colorBlendMap, TerrainData);
}