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 AddToBitmap(BitmapSurface bitmap)
{
if (Surface != null)
{
// top
BitmapSurface.Copy((int)Rectangle.X + 1, (int)Rectangle.Y, bitmap, 0, 0, Surface.Width, 1, Surface);
// bottom
BitmapSurface.Copy((int)Rectangle.X + 1, (int)(Rectangle.Y + Rectangle.Height) - 1, bitmap, 0, Surface.Height - 1, Surface.Width, 1, Surface);
//left
BitmapSurface.Copy((int)Rectangle.X, (int)Rectangle.Y + 1, bitmap, 0, 0, 1, Surface.Height, Surface);
// right
BitmapSurface.Copy((int)(Rectangle.X + Rectangle.Width) - 1, (int)Rectangle.Y + 1, bitmap, Surface.Width - 1, 0, 1, Surface.Height, Surface);
// center
BitmapSurface.Copy((int)Rectangle.X + 1, (int)Rectangle.Y + 1, bitmap, 0, 0, Surface.Width, Surface.Height, Surface);
// upper left
BitmapSurface.Copy((int)Rectangle.X, (int)Rectangle.Y, bitmap, 0, 0, 1, 1, Surface);
// upper right
BitmapSurface.Copy((int)(Rectangle.X + Rectangle.Width) - 1, (int)Rectangle.Y, bitmap, Surface.Width - 1, 0, 1, 1, Surface);
// lower left
BitmapSurface.Copy((int)Rectangle.X, (int)(Rectangle.Y + Rectangle.Height) - 1, bitmap, 0, Surface.Height - 1, 1, 1, Surface);
// lower right
BitmapSurface.Copy((int)(Rectangle.X + Rectangle.Width) - 1, (int)(Rectangle.Y + Rectangle.Height) - 1, bitmap, Surface.Width - 1, Surface.Height - 1, 1, 1, Surface);
}
if (Child1 != null)
{
Child1.AddToBitmap(bitmap);
}
if (Child2 != null)
{
Child2.AddToBitmap(bitmap);
}
}
