add Pause functionality

GitOrigin-RevId: 18fb954757

Shared/Input.cs

@@ -3,13 +3,14 @@ using Microsoft.Xna.Framework.Input;
 
 namespace SemiColinGames {
   struct Input {
+    public Vector2 Motion;
     public bool Jump;
     public bool Attack;
-    public Vector2 Motion;
 
+    public bool Pause;
+    public bool Debug;
     public bool Exit;
     public bool FullScreen;
-    public bool Debug;
 
     public Input(GamePadState gamePad, KeyboardState keyboard) {
       // First we process normal buttons.
@@ -19,10 +20,16 @@ namespace SemiColinGames {
           keyboard.IsKeyDown(Keys.K);
 
       // Then special debugging sorts of buttons.
-      Exit = gamePad.IsButtonDown(Buttons.Start) || keyboard.IsKeyDown(Keys.Escape);
-      FullScreen = gamePad.IsButtonDown(Buttons.Back) || keyboard.IsKeyDown(Keys.F12) ||
-          keyboard.IsKeyDown(Keys.OemPlus);
+      Exit = keyboard.IsKeyDown(Keys.Escape) ||
+          (gamePad.IsButtonDown(Buttons.LeftShoulder) &&
+           gamePad.IsButtonDown(Buttons.RightShoulder) &&
+           gamePad.IsButtonDown(Buttons.Start));
+      FullScreen = keyboard.IsKeyDown(Keys.F12) || keyboard.IsKeyDown(Keys.OemPlus) ||
+          (gamePad.IsButtonDown(Buttons.LeftShoulder) &&
+           gamePad.IsButtonDown(Buttons.RightShoulder) &&
+           gamePad.IsButtonDown(Buttons.Back));
       Debug = gamePad.IsButtonDown(Buttons.LeftShoulder) || keyboard.IsKeyDown(Keys.OemMinus);
+      Pause = gamePad.IsButtonDown(Buttons.Start) || keyboard.IsKeyDown(Keys.Pause);
 
       // Then potential motion directions. If the player attempts to input opposite directions at
       // once (up & down or left & right), those inputs cancel out, resulting in no motion.

Shared/SneakGame.cs

@@ -13,6 +13,7 @@ namespace SemiColinGames {
     SpriteBatch spriteBatch;
     SpriteFont font;
     bool fullScreen = false;
+    bool paused = false;
     IDisplay display;
 
     History<Input> input = new History<Input>(2);
@@ -71,6 +72,10 @@ namespace SemiColinGames {
         Exit();
       }
 
+      if (input[0].Pause && !input[1].Pause) {
+        paused = !paused;
+      }
+
       if (input[0].FullScreen && !input[1].FullScreen) {
         fullScreen = !fullScreen;
         display.SetFullScreen(fullScreen);
@@ -80,10 +85,11 @@ namespace SemiColinGames {
         Debug.Enabled = !Debug.Enabled;
       }
 
-      List<Rectangle> collisionTargets = world.CollisionTargets();
-      player.Update(gameTime, input, collisionTargets);
-
-      camera.Update(player.Position);
+      if (!paused) {
+        List<Rectangle> collisionTargets = world.CollisionTargets();
+        player.Update(gameTime, input, collisionTargets);
+        camera.Update(player.Position);
+      }
 
       base.Update(gameTime);
     }
@@ -95,6 +101,10 @@ namespace SemiColinGames {
       fpsCounter.Update();
       string fpsText = $"{GraphicsDevice.Viewport.Width}x{GraphicsDevice.Viewport.Height}, " +
         $"{fpsCounter.Fps} FPS";
+      if (paused) {
+        fpsText = fpsText + " (paused)";
+      }
+
       Debug.SetFpsText(fpsText);
 
       // Draw scene to RenderTarget.