Zeplin.DrawQueue.Draw C# (CSharp) Method

        public void Draw()
        {
            //finalize the current queue and put it in the structure.
            drawQueue.Enqueue(currentDrawLayer);

            //draw all queues
            while (drawQueue.Count > 0)
            {
                currentDrawLayer = drawQueue.Dequeue();
                if (parallaxQueue.Count == 0) parallaxQueue.Enqueue(Vector2.One);
                var parallaxFactors = parallaxQueue.Dequeue();
                RenderTarget2D lastDestination = null;
                if(currentDrawLayer.Count > 0) lastDestination = currentDrawLayer.Peek().destination; //initialize to the first RenderTarget in this layer's queue

                var parallaxMatrix = ComputeParallax(lastDestination, parallaxFactors);

                //get the initial draw state and initialize the sprite batch for the current layer's settings.
                ZeplinGame.GraphicsDeviceManager.GraphicsDevice.SetRenderTarget(0, lastDestination); //this is the first RenderTarget from the first queue.
                ZeplinGame.spriteBatch.Begin(SpriteBlendMode.AlphaBlend, SpriteSortMode.BackToFront, SaveStateMode.None, parallaxMatrix);

                //draw all commands in the queue for this layer
                while (currentDrawLayer.Count > 0)
                {
                    DrawCommand current = currentDrawLayer.Dequeue();
                    if (current.destination != lastDestination) //we must swap render targets
                    {
                        ZeplinGame.spriteBatch.End(); //stop this batch before changing device settings
                        ZeplinGame.GraphicsDeviceManager.GraphicsDevice.SetRenderTarget(0, current.destination);

                        //recompute parallax
                        parallaxMatrix = ComputeParallax(lastDestination, parallaxFactors);

                        ZeplinGame.spriteBatch.Begin(SpriteBlendMode.AlphaBlend, SpriteSortMode.Deferred, SaveStateMode.SaveState, parallaxMatrix);
                    }
                    ZeplinGame.spriteBatch.Draw(current.source, current.transformation.Position, null, Color.White, current.transformation.Rotation, current.transformation.Pivot, current.transformation.Scale, SpriteEffects.None, current.transformation.Depth);
                    lastDestination = current.destination;
                }
                //this layer is done, loop back to dequeue next layer, compute parallax, etc
            }

            ZeplinGame.spriteBatch.End();
        }