public virtual void Dispose()
{
if (font != null) font.Dispose();
if (colorFBO != null) colorFBO.Dispose();
if (depthFBO != null) depthFBO.Dispose();
if (skybox != null) skybox.Dispose();
skybox = null;
colorFBO = null;
depthFBO = null;
font = null;
world = null;
Node.ObjectCount = 0;
GLSLShader.UnBindShader();
GLSLShader.SetShader("default.shader", "");
}