private void load(AtlasNode root)
{
// heavily based on
// http://www.blackpawn.com/texts/lightmaps/default.html
// basically it uses a kd-tree to pack the lightmaps
// TODO: this shoudln't be hardcoded!!
int outputWidth = 512;
int outputHeight = 512;
_packedTexture = new BitmapSurface(512, 512, null);
root.AddToBitmap(_packedTexture);
// create the packed rectangles
root.UpdateRectList(_packedTextureRects);
// now we have the rects, but they need to be converted from pixel coords
/* for (int i = 0; i < _packedTextureRects.Length; i++)
* {
* Rect r = _packedTextureRects[i];
* r.X /= outputWidth;
* r.Y /= outputHeight;
* r.Width /= outputWidth;
* r.Height /= outputHeight;
*
* _packedTextureRects[i] = r;
* }*/
Utils.WriteTga("lightmap.tga", _packedTexture.Pixels, 512, 512);
}
public void UpdateRectList(Rect[] packedRects)
{
if (Surface != null)
{
// HACK: this problably only improves the direct3d9 renderer,
// with its weird texturing coordinate nonsense...
Rect r = Rectangle;
/*r.X += 0.5f;
* r.Y += 0.5f;
* r.Width -= 1.0f;
* r.Height -= 1.0f;*/
packedRects[Index] = r;
}
if (Child1 != null)
{
Child1.UpdateRectList(packedRects);
}
if (Child2 != null)
{
Child2.UpdateRectList(packedRects);
}
}
