private void Render()
{
Gl.glViewport(0, 0, Width, Height);
var vp = new[] { 0f, 0f, 0f, 0f };
Gl.glGetFloatv(Gl.GL_VIEWPORT, vp);
float aspect = (vp[2] - vp[0]) / (vp[3] - vp[1]);
Gl.glMatrixMode(Gl.GL_PROJECTION);
Gl.glLoadIdentity();
Glu.gluPerspective(90.0f, aspect, 0.02f, 32.0f);
Gl.glTranslatef(0, 0, -dist);
Gl.glRotatef(elev, 1, 0, 0);
Gl.glRotatef(ang, 0, 1, 0);
if (RenderScene != null)
{
RenderScene.Invoke();
}
}