public static void GetFaceUVs(this BlockID B, BlockFace F, Texture Tx, List <Vector2> Opaque, List <Vector2> Trans)
{
float TexSize = 1f / 6f * Tx.W;
float w = 1f / ((float)Tx.W / TexSize);
float h = 1f / ((float)Tx.H / TexSize);
float x = 0;
float y = h * B.GetTexID();
Vector2[] R;
List <Vector2> L = B.IsTransparent() ? Trans : Opaque;
switch (F)
{
case BlockFace.Forward:
R = new Vector2[] {
new Vector2(x + w * 2, y + h),
new Vector2(x + w * 3, y + h),
new Vector2(x + w * 3, y),
new Vector2(x + w * 2, y),
};
break;
case BlockFace.Backward:
R = new Vector2[] {
new Vector2(x + w * 5, y),
new Vector2(x + w * 4, y),
new Vector2(x + w * 4, y + h),
new Vector2(x + w * 5, y + h),
};
break;
case BlockFace.Left:
R = new Vector2[] {
new Vector2(x + w * 6, y),
new Vector2(x + w * 5, y),
new Vector2(x + w * 5, y + h),
new Vector2(x + w * 6, y + h),
};
break;
case BlockFace.Right:
R = new Vector2[] {
new Vector2(x + w * 3, y + h),
new Vector2(x + w * 4, y + h),
new Vector2(x + w * 4, y),
new Vector2(x + w * 3, y),
};
break;
case BlockFace.Top:
R = new Vector2[] {
new Vector2(x, y),
new Vector2(x, y + h),
new Vector2(x + w, y + h),
new Vector2(x + w, y),
};
break;
case BlockFace.Bottom:
R = new Vector2[] {
new Vector2(x + w, y),
new Vector2(x + w, y + h),
new Vector2(x + w * 2, y + h),
new Vector2(x + w * 2, y),
};
break;
default:
throw new Exception("Unknown block face");
}
L.AddRange(R);
}
