public TextureAtlas(int width, int height)
{
Width = width;
Height = height;
root = new TextureAtlasTreeNode(new TextureAtlasArea(0, 0, width, height));
searchTable = new Dictionary<int, TextureAtlasTreeNode>();
}
public TextureAtlasTreeNode Insert(int width, int height, int id)
{
if(IsLeaf)
{
if (ID > 0)
return null;
if (width > Area.Width || height > Area.Height)
return null;
if (width == Area.Width && height == Area.Height)
{
ID = id;
return this;
}
var dw = Area.Width - width;
var dh = Area.Height - height;
TextureAtlasArea areaA, areaB;
if (dw > dh)
{
areaA = new TextureAtlasArea(Area.X, Area.Y, width, Area.Height);
areaB = new TextureAtlasArea(Area.X + width, Area.Y, Area.Width - width, Area.Height);
}
else
{
areaA = new TextureAtlasArea(Area.X, Area.Y, Area.Width, height);
areaB = new TextureAtlasArea(Area.X, Area.Y + height, Area.Width, Area.Height - height);
}
ChildA = new TextureAtlasTreeNode(areaA);
ChildB = new TextureAtlasTreeNode(areaB);
return ChildA.Insert(width, height, id);
}
else
{
var newNode = ChildA.Insert(width, height, id);
if (newNode != null)
return newNode;
return ChildB.Insert(width, height, id);
}
}
