XNA 4.0 hra 03.03.12

using System;
using System.Collections.Generic;
using System.Linq;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.GamerServices;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Media;

namespace AnimatedSprites
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        #region variables
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        MouseState prevMouseState;

        // Texture stuff
        Texture2D texture;
        Texture2D skullTexture;
        Texture2D plusTexture;
        Point ringFrameSize = new Point(75, 75);
        Point ringCurrentFrame = new Point(0, 0);
        Point ringSheetSize = new Point(6, 8);
        Point skullFrameSize = new Point(75, 75);
        Point skullCurrentFrame = new Point(0, 0);
        Point skullSheetSize = new Point(6, 8);
        Point plusFrameSize = new Point(75, 75);
        Point plusSheetSize = new Point(6, 4);
        Point plusCurrentFrame = new Point(0, 0);
        Vector2 ringPosition = new Vector2(100, 100);
        Vector2 skullPosition = new Vector2(300, 300);
        Vector2 plusPosition = new Vector2(0, 0);
        float ringSpeed = 6f;
        float skullSpeed = 2f;
        float plusSpeed = 2f;

     // Framerate stuff
        int ringTimeSinceLastFrame = 0;
        int ringMillisecondsPerFrame = 50;
        int skullTimeSinceLastFrame = 0;
        int skullMillisecondsPerFrame = 50;
        int plusTimeSinceLastFrame = 0;
        int plusMillisecondsPerFrame = 50;
        #endregion

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
     }
        #region init and load
        /// <summary>
        /// Allows the game to perform any initialization it needs to before starting to run.
        /// This is where it can query for any required services and load any non-graphic
        /// related content.  Calling base.Initialize will enumerate through any components
        /// and initialize them as well.
        /// </summary>
        protected override void Initialize()
        {
            // TODO: Add your initialization logic here

            base.Initialize();
        }

        /// <summary>
        /// LoadContent will be called once per game and is the place to load
        /// all of your content.
        /// </summary>
        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            spriteBatch = new SpriteBatch(GraphicsDevice);

            texture = Content.Load<Texture2D>(@"images\threerings");
            skullTexture = Content.Load<Texture2D>(@"images\skullball");
            plusTexture = Content.Load<Texture2D>(@"images\plus");
        }
        #endregion
        #region unload
        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// all content.
        /// </summary>
        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }
        #endregion
        #region update
        /// <summary>
        /// Allows the game to run logic such as updating the world,
        /// checking for collisions, gathering input, and playing audio.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Update(GameTime gameTime)
        {
            // Allows the game to exit
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();
            updateFrameRateImages(ringTimeSinceLastFrame, ringMillisecondsPerFrame,
                ringCurrentFrame, ringSheetSize, gameTime);
        //frameRateImages directly - metoda je výše, ale nefunkční -> animace nefunguje
            plusTimeSinceLastFrame += gameTime.ElapsedGameTime.Milliseconds;
            if (plusTimeSinceLastFrame > plusMillisecondsPerFrame)
            {
                plusTimeSinceLastFrame -= plusMillisecondsPerFrame;
                ++plusCurrentFrame.X;
                if (plusCurrentFrame.X >= plusSheetSize.X)
                {
                    plusCurrentFrame.X = 0;
                    ++plusCurrentFrame.Y;
                    if (plusCurrentFrame.Y >= plusSheetSize.Y)
                        plusCurrentFrame.Y = 0;
                }
            }

            skullTimeSinceLastFrame += gameTime.ElapsedGameTime.Milliseconds;
            if (skullTimeSinceLastFrame > skullMillisecondsPerFrame)
            {
                skullTimeSinceLastFrame -= skullMillisecondsPerFrame;
                ++skullCurrentFrame.X;
                if (skullCurrentFrame.X >= skullSheetSize.X)
                {
                    skullCurrentFrame.X = 0;
                    ++skullCurrentFrame.Y;
                    if (skullCurrentFrame.Y >= skullSheetSize.Y)
                        skullCurrentFrame.Y = 0;
                }
            }

            KeyboardState keyboardState = Keyboard.GetState();
            if (keyboardState.IsKeyDown(Keys.Left) == true)
                ringPosition.X -= ringSpeed;
            if (keyboardState.IsKeyDown(Keys.Right) == true)
                ringPosition.X += ringSpeed;
            if (keyboardState.IsKeyDown(Keys.Up) == true)
                ringPosition.Y -= ringSpeed;
            if (keyboardState.IsKeyDown(Keys.Down) == true)
                ringPosition.Y += ringSpeed;
            MouseState mouseState = Mouse.GetState();
            if (mouseState.X != prevMouseState.X || mouseState.Y != prevMouseState.Y)
                ringPosition = new Vector2(mouseState.X, mouseState.Y);
            prevMouseState = mouseState;
            if (ringPosition.X < 0)
                ringPosition.X = 0;
            if (ringPosition.Y < 0)
                ringPosition.Y = 0;
            if (ringPosition.X > Window.ClientBounds.Width - ringFrameSize.X)
                ringPosition.X = Window.ClientBounds.Width - ringFrameSize.X;
            if (ringPosition.Y > Window.ClientBounds.Height - ringFrameSize.Y)
                ringPosition.Y = Window.ClientBounds.Height - ringFrameSize.Y;
    base.Update(gameTime);
        }
    //metoda na pomalejší animaci, která nefunguje
        public void updateFrameRateImages(int timeSinceLastFrame, int millisecondsPerFrame,
            Point currentFrame, Point sheetSize, GameTime gt)
        {
            timeSinceLastFrame += gt.ElapsedGameTime.Milliseconds;
            if (timeSinceLastFrame > millisecondsPerFrame)
            {
                timeSinceLastFrame -= millisecondsPerFrame;
                ++currentFrame.X;
                if (currentFrame.X >= sheetSize.X)
                {
                    currentFrame.X = 0;
                    ++currentFrame.Y;
                    if (currentFrame.Y >= sheetSize.Y)
                        currentFrame.Y = 0;
                }
            }
        }
        #endregion
        #region draw
        /// <summary>
        /// This is called when the game should draw itself.
        /// </summary>
        /// <param name="gameTime">Provides a snapshot of timing values.</param>
        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.White);

            spriteBatch.Begin(SpriteSortMode.FrontToBack, BlendState.AlphaBlend);

            spriteBatch.Draw(texture, ringPosition,
                new Rectangle(ringCurrentFrame.X * ringFrameSize.X,
                    ringCurrentFrame.Y * ringFrameSize.Y,
                    ringFrameSize.X,
                    ringFrameSize.Y),
                Color.White, 0, Vector2.Zero,
                1, SpriteEffects.None, 1);

            spriteBatch.Draw(skullTexture, skullPosition,
                            new Rectangle(skullCurrentFrame.X * skullFrameSize.X,
                                skullCurrentFrame.Y * skullFrameSize.Y,
                                skullFrameSize.X,
                                skullFrameSize.Y),
                                Color.White, 0, Vector2.Zero,
                                1, SpriteEffects.None, 0);

            spriteBatch.Draw(plusTexture, plusPosition,
                            new Rectangle(plusCurrentFrame.X * plusCurrentFrame.X,
                                plusCurrentFrame.Y * plusCurrentFrame.Y,
                plusCurrentFrame.X, plusCurrentFrame.Y),
                                Color.White, 0, Vector2.Zero, 1,
                                SpriteEffects.None, 0);

            spriteBatch.End();

            base.Draw(gameTime);
        }
        #endregion
    }
}