private OpenGlRenderer(ModelView mv)
{
if (mv == null)
{
throw new ArgumentNullException(nameof(mv));
}
GLDoubleBuffer = new GLDoubleBuffer(mv);
_MView = mv;
DoSetup();
_Disposable = _MView.BufferSwapNotifyObservable().Subscribe(args =>
{
var time = DateTime.Now;
var layers =
GLDoubleBuffer.Front.GroupBy(o => o.Value.Item1)
.OrderBy(o => o.Key)
.Select(o => new { Index = o.Key, Renderables = o.Select(q => q.Value.Item2).ToList() })
.ToList();
foreach (var layer in layers)
{
// Clear the depth buffer after each subsequent layer. This
// will ensure that they are drawn on top of each other.
if (layer.Index != 0)
{
GL.Clear(ClearBufferMask.DepthBufferBit);
}
foreach (var r in layer.Renderables)
{
r.Render(time);
}
}
});
}