public override void delete(IRenderingEngine re)
{
if (fboId != -1)
{
re.deleteFramebuffer(fboId);
fboId = -1;
}
if (depthRenderBufferId != -1)
{
re.deleteRenderbuffer(depthRenderBufferId);
depthRenderBufferId = -1;
}
base.delete(re);
}