basic Player motions and poses

GitOrigin-RevId: 88a4e7a208

Jumpy.Shared/Jumpy.Shared.projitems

@@ -12,5 +12,6 @@
     <Compile Include="$(MSBuildThisFileDirectory)IDisplay.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)KeyboardInput.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)JumpyGame.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Player.cs" />
   </ItemGroup>
 </Project>

Jumpy.Shared/JumpyGame.cs

@@ -8,12 +8,13 @@ namespace Jumpy {
   public class JumpyGame : Game {
     GraphicsDeviceManager graphics;
     SpriteBatch spriteBatch;
-    Texture2D playerTexture;
     SpriteFont font;
     KeyboardInput keyboardInput = new KeyboardInput();
     bool fullScreen = false;
     IDisplay display;
 
+    Player player;
+
     public JumpyGame() {
       graphics = new GraphicsDeviceManager(this);
       IsMouseVisible = true;
@@ -33,7 +34,8 @@ namespace Jumpy {
     protected override void LoadContent() {
       spriteBatch = new SpriteBatch(GraphicsDevice);
       font = Content.Load<SpriteFont>("font");
-      playerTexture = Content.Load<Texture2D>("player");
+      player = new Player(Content.Load<Texture2D>("player"));
+
     }
 
     // Called once per game. Unloads all game content.
@@ -44,6 +46,7 @@ namespace Jumpy {
     // Updates the game world.
     protected override void Update(GameTime gameTime) {
       keyboardInput.Update();
+      GamePadState gamePadState = GamePad.GetState(PlayerIndex.One);
       List<Keys> keysDown = keyboardInput.NewKeysDown();
 
       if (keysDown.Contains(Keys.F12)) {
@@ -51,11 +54,13 @@ namespace Jumpy {
         display.SetFullScreen(fullScreen);
       }
 
-      if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed ||
+      if (gamePadState.Buttons.Start == ButtonState.Pressed ||
           keysDown.Contains(Keys.Escape)) {
         Exit();
       }
 
+      player.Update(gameTime, gamePadState);
+
       base.Update(gameTime);
     }
 
@@ -63,18 +68,8 @@ namespace Jumpy {
     protected override void Draw(GameTime gameTime) {
       GraphicsDevice.Clear(Color.CornflowerBlue);
 
-      const int spriteSize = 144;
-      int frameNum = gameTime.TotalGameTime.Milliseconds / 250;
-      if (frameNum == 3) {
-        frameNum = 1;
-      }
-      int sourceX = spriteSize * frameNum + spriteSize * 3;
-      int sourceY = spriteSize * 0;
-      Rectangle source = new Rectangle(sourceX, sourceY, spriteSize, spriteSize);
-      Vector2 position = new Vector2(100, 100);
-      Vector2 spriteCenter = new Vector2(spriteSize / 2, spriteSize / 2);
       spriteBatch.Begin();
-      spriteBatch.Draw(playerTexture, position, source, Color.White, 0f, spriteCenter, Vector2.One, SpriteEffects.FlipHorizontally, 0f);
+      player.Draw(gameTime, spriteBatch);
       spriteBatch.End();
 
       // spriteBatch.DrawString(font, "hello world", new Vector2(100, 100), Color.Black);

Jumpy.Shared/Player.cs

@@ -0,0 +1,73 @@
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+using System;
+
+namespace Jumpy {
+  class Player {
+    enum Facing { Left, Right };
+    enum Pose { Walking, Standing, Crouching, Stretching };
+
+    private const int spriteSize = 144;
+    private const int spriteWidth = 20;
+    private const int moveSpeed = 600;
+
+    // TODO: stop assuming 1920x1080.
+    private Vector2 position = new Vector2(200, 1080 - spriteSize / 2);
+    private Facing facing = Facing.Right;
+    private Pose pose = Pose.Standing;
+    private Texture2D texture;
+
+    public Player(Texture2D texture) {
+      this.texture = texture;
+    }
+
+    public void Update(GameTime gameTime, GamePadState gamePadState) {
+      Vector2 leftStick = gamePadState.ThumbSticks.Left;
+      if (leftStick.X < -0.5) {
+        facing = Facing.Left;
+        pose = Pose.Walking;
+        position.X -= moveSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds;
+      } else if (leftStick.X > 0.5) {
+        facing = Facing.Right;
+        pose = Pose.Walking;
+        position.X += moveSpeed * (float)gameTime.ElapsedGameTime.TotalSeconds;
+      } else if (leftStick.Y < -0.5) {
+        pose = Pose.Crouching;
+      } else if (leftStick.Y > 0.5) {
+        pose = Pose.Stretching;
+      } else {
+        pose = Pose.Standing;
+      }
+      position.X = Math.Min(Math.Max(position.X, 0 + spriteWidth), 1920 - spriteWidth);
+    }
+
+    private Point spritePosition(Pose pose, GameTime time) {
+      switch (pose) {
+        case Pose.Walking:
+          int frameNum = (time.TotalGameTime.Milliseconds / 125) % 4;
+          if (frameNum == 3) {
+            frameNum = 1;
+          }
+          return new Point(spriteSize * frameNum + spriteSize * 6, 0);
+        case Pose.Crouching:
+          return new Point(spriteSize * 7, spriteSize * 2);
+        case Pose.Stretching:
+          return new Point(spriteSize * 1, spriteSize * 2);
+        case Pose.Standing:
+        default:
+          return new Point(spriteSize * 7, 0);
+      }
+    }
+
+    public void Draw(GameTime time, SpriteBatch spriteBatch) {
+      Point source = spritePosition(pose, time);
+      Rectangle textureSource = new Rectangle(source.X, source.Y, spriteSize, spriteSize);
+      Vector2 spriteCenter = new Vector2(spriteSize / 2, spriteSize / 2);
+      SpriteEffects effect = facing == Facing.Right ?
+        SpriteEffects.FlipHorizontally : SpriteEffects.None;
+      spriteBatch.Draw(texture, position, textureSource, Color.White, 0f, spriteCenter,
+        Vector2.One, effect, 0f);
+    }
+  }
+}