public HeightMap clone()
{
HeightMap heightMap = new HeightMap(width, height);
for (int x = 0; x < width; x++)
for (int y = 0; y < height; y++)
heightMap.setHeight(x, y, map[x, y]);
return heightMap;
}
public NormalMap(HeightMap heightMap)
{
initialise(heightMap);
}
private void initialise(HeightMap heightMap)
{
width = heightMap.getMapWidth();
height = heightMap.getMapHeight();
normals = new Vector3[width, height, 2];
for (int x = 0; x < width; x++)
for (int y = 0; y < height; y++)
{
Vector3 p0 = heightMap.getPositionAt(x, y);
Vector3 p1 = heightMap.getPositionAt(x + 1, y);
Vector3 p2 = heightMap.getPositionAt(x, y + 1);
Vector3 p3 = heightMap.getPositionAt(x + 1, y + 1);
Vector3 v0 = p2 - p0;
Vector3 v1 = p3 - p2;
Vector3 v2 = p3 - p1;
Vector3 v3 = p1 - p0;
normals[x, y, 0] = Vector3.Cross(v1, v0);
normals[x, y, 1] = Vector3.Cross(v3, v2);
}
}