private int interpolateHeight(int x, int z, float ratio) {
int low, highX, highZ;
float intX, intZ;
float scaledX = x * ratio;
float scaledZ = z * ratio;
float interpolation;
low = heightMap.getTrueHeightAtPoint((int) scaledX, (int) scaledZ);
if (scaledX + 1 >= size) {
return low;
}
highX = heightMap.getTrueHeightAtPoint((int) scaledX + 1, (int) scaledZ);
interpolation = scaledX - (int) scaledX;
intX = ((highX - low) * interpolation) + low;
if (scaledZ + 1 >= size) {
return low;
}
highZ = heightMap.getTrueHeightAtPoint((int) scaledX, (int) scaledZ + 1);
interpolation = scaledZ - (int) scaledZ;
intZ = ((highZ - low) * interpolation) + low;
return (int) ((intX + intZ) / 2f);
}
/**
* Constructor instantiates a new <code>ProceduralTexture</code> object initializing the list for
* textures and the height map.
*
* @param heightMap the height map to use for the texture generation.
*/
public ProceduralTextureGenerator(AbstractHeightMap heightMap) {
textureList = new ArrayList<TextureTile>();
this.heightMap = heightMap;
this.size = heightMap.getSize();
}