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using Microsoft.Xna.Framework; using Microsoft.Xna.Framework.Graphics; using Microsoft.Xna.Framework.Input;
using System; using System.Collections.Generic;
namespace SemiColinGames { public class SneakGame : Game { readonly GraphicsDeviceManager graphics; RenderTarget2D renderTarget;
SpriteBatch spriteBatch; SpriteFont font; bool fullScreen = false; bool paused = false; IDisplay display;
readonly History<Input> input = new History<Input>(2);
readonly FpsCounter fpsCounter = new FpsCounter(); Texture2D grasslandBg1; Texture2D grasslandBg2;
Player player; World world; readonly Camera camera = new Camera();
public SneakGame() { graphics = new GraphicsDeviceManager(this) { SynchronizeWithVerticalRetrace = false }; IsFixedTimeStep = true; TargetElapsedTime = TimeSpan.FromSeconds(1.0 / 60); IsMouseVisible = true; Content.RootDirectory = "Content"; }
// Performs initialization that's needed before starting to run.
protected override void Initialize() { display = (IDisplay) Services.GetService(typeof(IDisplay)); display.Initialize(Window, graphics); display.SetFullScreen(fullScreen);
Debug.Initialize(GraphicsDevice);
renderTarget = new RenderTarget2D( GraphicsDevice, camera.Width, camera.Height, false /* mipmap */, GraphicsDevice.PresentationParameters.BackBufferFormat, DepthFormat.Depth24);
base.Initialize(); }
// Called once per game. Loads all game content.
protected override void LoadContent() { spriteBatch = new SpriteBatch(GraphicsDevice); font = Content.Load<SpriteFont>("font");
player = new Player(Content.Load<Texture2D>("player_1x")); world = new World(Content.Load<Texture2D>("grassland")); grasslandBg1 = Content.Load<Texture2D>("grassland_bg1"); grasslandBg2 = Content.Load<Texture2D>("grassland_bg2"); }
// Called once per game. Unloads all game content.
protected override void UnloadContent() { }
// Updates the game world.
protected override void Update(GameTime gameTime) { Debug.Clear();
input.Add(new Input(GamePad.GetState(PlayerIndex.One), Keyboard.GetState()));
if (input[0].Exit) { Exit(); }
if (input[0].Pause && !input[1].Pause) { paused = !paused; }
if (input[0].FullScreen && !input[1].FullScreen) { fullScreen = !fullScreen; display.SetFullScreen(fullScreen); }
if (input[0].Debug && !input[1].Debug) { Debug.Enabled = !Debug.Enabled; }
if (!paused) { float modelTime = (float) gameTime.ElapsedGameTime.TotalSeconds; Clock.AddModelTime(modelTime); List<Rectangle> collisionTargets = world.CollisionTargets(); player.Update(modelTime, input, collisionTargets); camera.Update(player.Position); }
base.Update(gameTime); }
// Called when the game should draw itself.
protected override void Draw(GameTime gameTime) { // We need to update the FPS counter in Draw() since Update() might get called more
// frequently, especially when gameTime.IsRunningSlowly.
fpsCounter.Update(); string fpsText = $"{GraphicsDevice.Viewport.Width}x{GraphicsDevice.Viewport.Height}, " + $"{fpsCounter.Fps} FPS"; if (paused) { fpsText += " (paused)"; }
Debug.SetFpsText(fpsText);
// Draw scene to RenderTarget.
GraphicsDevice.SetRenderTarget(renderTarget); GraphicsDevice.Clear(Color.CornflowerBlue); spriteBatch.Begin(SpriteSortMode.Deferred, null, SamplerState.LinearWrap, null, null);
// Draw background.
Rectangle bgSource = new Rectangle( (int) (camera.Left * 0.25), 0, camera.Width, camera.Height); Rectangle bgTarget = new Rectangle(0, 0, camera.Width, camera.Height); spriteBatch.Draw(grasslandBg2, bgTarget, bgSource, Color.White); bgSource = new Rectangle( (int) (camera.Left * 0.5), 0, camera.Width, camera.Height); spriteBatch.Draw(grasslandBg1, bgTarget, bgSource, Color.White);
// Draw player.
player.Draw(spriteBatch, camera);
// Draw foreground tiles.
world.Draw(spriteBatch, camera);
// Draw debug rects & lines.
Debug.Draw(spriteBatch, camera);
// Aaaaand we're done.
spriteBatch.End();
// Draw RenderTarget to screen.
GraphicsDevice.SetRenderTarget(null); GraphicsDevice.Clear(Color.Black); spriteBatch.Begin(SpriteSortMode.Immediate, BlendState.AlphaBlend, SamplerState.PointClamp, DepthStencilState.Default, RasterizerState.CullNone); Rectangle drawRect = new Rectangle( 0, 0, GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height); spriteBatch.Draw(renderTarget, drawRect, Color.White);
// Draw debug toasts.
Debug.DrawToasts(spriteBatch, font);
spriteBatch.End();
base.Draw(gameTime); } } }
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