go back to just a single RenderTarget

GitOrigin-RevId: 0b8fc30900

Shared/SneakGame.cs

@@ -8,12 +8,7 @@ using System.Collections.Generic;
 namespace SemiColinGames {
   public class SneakGame : Game {
     GraphicsDeviceManager graphics;
-
-    // TODO: use a History<RenderTarget2D> but implement functions that let us re-use the
-    // RenderTargets instead of re-creating them every frame?
-    const int numRenderTargets = 1;
-    RenderTarget2D[] renderTargets = new RenderTarget2D[numRenderTargets];
-    int renderTargetIdx = 0;
+    RenderTarget2D renderTarget;
 
     SpriteBatch spriteBatch;
     SpriteFont font;
@@ -45,11 +40,9 @@ namespace SemiColinGames {
 
       Debug.Initialize(GraphicsDevice);
 
-      for (int i = 0; i < renderTargets.Length; i++) {
-        renderTargets[i] = new RenderTarget2D(
-          GraphicsDevice, camera.Width, camera.Height, false /* mipmap */,
-          GraphicsDevice.PresentationParameters.BackBufferFormat, DepthFormat.Depth24);
-      }
+      renderTarget = new RenderTarget2D(
+        GraphicsDevice, camera.Width, camera.Height, false /* mipmap */,
+        GraphicsDevice.PresentationParameters.BackBufferFormat, DepthFormat.Depth24);
 
       base.Initialize();
     }
@@ -109,8 +102,6 @@ namespace SemiColinGames {
       fpsCounter.Update();
 
       // Draw scene to RenderTarget.
-      RenderTarget2D renderTarget = renderTargets[renderTargetIdx];
-      renderTargetIdx = (renderTargetIdx + 1) % renderTargets.Length;
       GraphicsDevice.SetRenderTarget(renderTarget);
       GraphicsDevice.Clear(Color.CornflowerBlue);
       spriteBatch.Begin(SpriteSortMode.Deferred, null, SamplerState.LinearWrap, null, null);