Pong.PongExample.Draw C# (CSharp) Method

        public override void Draw(GameTime gameTime, Frame frame)
        {
            ClearBatch.AddNew(frame, 4, Materials.Clear, clearColor: new Color(16, 32, 48));

            var alphaGeometry = Materials.Get(Materials.ScreenSpaceGeometry, blendState: BlendState.AlphaBlend);

            using (var gb = GeometryBatch.New(frame, 5, alphaGeometry)) {
                gb.AddGradientFilledQuad(
                    Vector2.Zero, new Vector2(Graphics.PreferredBackBufferWidth, Graphics.PreferredBackBufferHeight),
                    Color.DarkSlateGray, Color.DarkSlateGray,
                    Color.SlateBlue, Color.SlateBlue
                );
            }

            using (var gb = GeometryBatch.New(frame, 6, alphaGeometry)) {
                var alphaBlack = new Color(0, 0, 0, 192);
                var alphaBlack2 = new Color(0, 0, 0, 64);

                gb.AddQuadBorder(
                    Playfield.Bounds.TopLeft + new Vector2(32 + 24, 0),
                    Playfield.Bounds.BottomRight + new Vector2(-32 - 24, 0),
                    alphaBlack2, alphaBlack, 24
                );
            }

            // Render the contents of the trail buffer to the screen using additive blending
            using (var bb = BitmapBatch.New(frame, 7, Materials.Trail)) {
                bb.Add(new BitmapDrawCall(
                    TrailBuffer, Vector2.Zero, (float)TrailScale
                ));
            }

            // Render the paddles and ball to both the framebuffer and the trail buffer (note the different layer values)
            using (var gb = GeometryBatch.New(frame, 8, alphaGeometry))
            using (var gb2 = GeometryBatch.New(frame, 9, alphaGeometry))
            using (var trailBatch = GeometryBatch.New(frame, 2, alphaGeometry)) {
                foreach (var paddle in Paddles) {
                    gb.AddFilledQuad(
                        paddle.Bounds.TopLeft, paddle.Bounds.BottomRight, Color.White
                    );
                    gb2.AddQuadBorder(
                        paddle.Bounds.TopLeft, paddle.Bounds.BottomRight, Color.Black, Color.Black, 2.25f
                    );

                    trailBatch.AddFilledQuad(
                        paddle.Bounds.TopLeft, paddle.Bounds.BottomRight, Color.White
                    );
                }

                gb.AddFilledRing(Ball.Position, 0.0f, Ball.Radius, Color.White, Color.White);
                gb2.AddFilledRing(Ball.Position, Ball.Radius, Ball.Radius + 2.0f, Color.Black, Color.Black);

                trailBatch.AddFilledRing(Ball.Position, 0.0f, Ball.Radius, Color.White, Color.White);
            }

            // Render the score values using a stringbatch (unfortunately this uses spritebatch to render spritefonts :( )
            {
                var ir = new ImperativeRenderer(frame, Materials, 10, blendState: BlendState.AlphaBlend);
                ir.DrawString(
                    Font, String.Format("Player 1: {0:00}", Scores[0]),
                    new Vector2(16, 16)
                );

                var player2Text = String.Format("Player 2: {0:00}", Scores[1]);
                ir.DrawString(
                    Font, player2Text,
                    new Vector2(Graphics.PreferredBackBufferWidth - 16 - Font.MeasureString(player2Text).X, 16)
                );
            }

            // The first stage of our frame involves selecting the trail buffer as our render target (note that it's layer 0)
            SetRenderTargetBatch.AddNew(frame, 0, TrailBuffer);

            if (FirstFrame) {
                // If it's the first time we've rendered, we erase the trail buffer since it could contain anything
                ClearBatch.AddNew(frame, 1, Materials.Clear, clearColor: Color.Black);
                FirstFrame = false;
            } else {
                // Otherwise, we fade out the contents of the trail buffer
                using (var gb = GeometryBatch.New(frame, 1, Materials.SubtractiveGeometry)) {
                    gb.AddFilledQuad(
                        new Bounds(Vector2.Zero, new Vector2(Graphics.PreferredBackBufferWidth, Graphics.PreferredBackBufferHeight)),
                        new Color(12, 12, 12, 0)
                    );
                }
            }

            // After the trail buffer has been updated, we turn it off and begin rendering to the framebuffer. Note layer 3.
            SetRenderTargetBatch.AddNew(frame, 3, null);
        }