控制精灵和碰撞检测

[csharp]
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 WindowsGame6
{

    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        Texture2D ringtexture;                                         //三环动画的相关变量
        Point ringframeSize = new Point(75, 75);
        Point ringcurrentFrame = new Point(0, 0);
        Point ringsheetSize = new Point(6, 8);
        Vector2 ringpos1 = Vector2.Zero;
        const float ringspeed = 5;

        Texture2D skulltexture;                                        //骷髅头动画相关变量
        Point skullframeSize = new Point(75, 75);
        Point skullcurrentFrame = new Point(0, 0);
        Point skullsheetSize = new Point(6, 8);

        MouseState prevmousestate;
        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        protected override void Initialize()
        {
            // TODO: 在此处添加初始化逻辑

            base.Initialize();
        }

        protected override void LoadContent()
        {
            // 创建新的 SpriteBatch，可将其用于绘制纹理。
            spriteBatch = new SpriteBatch(GraphicsDevice);
            ringtexture = Content.Load<Texture2D>("Images//threerings");         //加载两幅位图
            skulltexture = Content.Load<Texture2D>("Images//skullball");
            // TODO: 在此处使用 this.Content 加载游戏内容
        }

        protected override void UnloadContent()
        {
            // TODO: 在此处取消加载任何非 ContentManager 内容
        }

        protected override void Update(GameTime gameTime)
        {
            // 允许游戏退出
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            ++ringcurrentFrame.X;                                               //循环三环精灵位图
            if (ringcurrentFrame.X >= ringsheetSize.X)
            {
                ringcurrentFrame.X = 0;
                ++ringcurrentFrame.Y;
                if (ringcurrentFrame.Y >= ringsheetSize.Y)
                    ringcurrentFrame.Y = 0;
            }

            ++skullcurrentFrame.X;                                               //循环骷髅精灵位图
            if (skullcurrentFrame.X >= skullsheetSize.X)
            {
                skullcurrentFrame.X = 0;
                ++skullcurrentFrame.Y;
                if (skullcurrentFrame.Y >= skullsheetSize.Y)
                    skullcurrentFrame.Y = 0;
            }
            // TODO: 在此处添加更新逻辑

     &nbs

补充：软件开发 , C# ,