碰撞检测

Question

我是Java新手，我有基本的编程知识。我最近开始开发一个游戏（在教程的帮助下）。游戏是一款RPG游戏。它的设置使得玩家的头像始终位于屏幕的中心，但后台会滚动。我知道这已经被问过，但没有一个答案对我有意义。基本上，我如何为多个对象创建碰撞检测？我希望它能够让我的球员在撞墙时停止移动。我目前已经设定了边界的碰撞，但是如何设置房屋，墙壁等的碰撞？我的代码副本如下。先谢谢你。另外，我正在使用Slick2D。

package javagame; 

import org.newdawn.slick.*; 
import org.newdawn.slick.geom.Rectangle; 
import org.newdawn.slick.state.*; 
//Need "extends etc." for creating basic screen/state 
public class Play extends BasicGameState{ 

public Rectangle lake1; 

Animation avatar, movingUp, movingDown, movingLeft, movingRight; 
Image worldMap; 
boolean quit = false; 
int[] duration = {200,200}; 
float avatarPositionX = 0; 
float avatarPositionY = 0; 
float shiftX = avatarPositionX + 250; 
float shiftY = avatarPositionY + 180; 

public Play(int state){ 
} 

public void init(GameContainer gc, StateBasedGame sbg) throws SlickException{ 
    worldMap = new Image("res/WaterMap.png"); 
    Image[] walkUp = {new Image("res/CharBack.png"), new 
Image("res/CharBack.png")}; 
    Image[] walkDown = {new Image("res/CharFront.png"), new 
Image("res/CharFront.png")}; 
    Image[] walkLeft = {new Image("res/CharLeft.png"), new 
Image("res/CharLeft.png")}; 
    Image[] walkRight = {new Image("res/CharRight.png"), new 
Image("res/CharRight.png")}; 

    movingUp = new Animation(walkUp, duration, false); 
    movingDown = new Animation(walkDown, duration, false); 
    movingLeft = new Animation(walkLeft, duration, false); 
    movingRight = new Animation(walkRight, duration, false); 
    avatar = movingDown; 
} 
//Takes gc and StateBasedGame and Graphics 
public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws  
SlickException{ 
    lake1 = new Rectangle(132, 277, 87, 54); 
    worldMap.draw(avatarPositionX, avatarPositionY); 
    avatar.draw(shiftX, shiftY); 
    g.drawString("Your X: "+avatarPositionX+"\nYour Y: "+avatarPositionY, 350, 
20); 

    if(quit==true){ 
     g.drawString("Resume (R)", 200, 100); 
     g.drawString("Main Menu (M)", 200, 150); 
     g.drawString("Quit (Q)", 200, 200); 
     if(quit==false){ 
      g.clear(); 
     } 
    } 
} 
//Updates images on screen; creates animation 
public void update(GameContainer gc, StateBasedGame sbg, int delta) throws 
SlickException{ 
    Input input = gc.getInput(); 
    //up 
    if(input.isKeyDown(Input.KEY_UP)){ 
     avatar = movingUp; 
     avatarPositionY += delta * .1f; 
     //+= changed to -= 
     if(avatarPositionY>180){ 
      avatarPositionY -= delta * .1f; 
     } 
    } 
    //down 
    if(input.isKeyDown(Input.KEY_DOWN)){ 
     avatar = movingDown; 
     avatarPositionY -= delta * .1f; 
     if(avatarPositionY<-497){ 
      avatarPositionY += delta * .1f; 
     } 
    } 
    //left 
    if(input.isKeyDown(Input.KEY_LEFT)){ 
     avatar = movingLeft; 
     avatarPositionX += delta * .1f; 
     if(avatarPositionX>249){ 
      avatarPositionX -= delta * .1f; 
     } 
    } 
    //right 
    if(input.isKeyDown(Input.KEY_RIGHT)){ 
     avatar = movingRight; 
     avatarPositionX -= delta * .1f; 
     if(avatarPositionX<-433){ 
      avatarPositionX += delta * .1f; 
     } 
    } 
    //escape 
    if(input.isKeyDown(Input.KEY_ESCAPE)){ 
     quit = true; 
    } 
    //when menu is up 
    if(quit == true){ 
     if(input.isKeyDown(Input.KEY_R)){ 
      quit = false; 
     } 
     if(input.isKeyDown(Input.KEY_M)){ 
      sbg.enterState(0); 
     } 
     if(input.isKeyDown(Input.KEY_Q)){ 
      System.exit(0); 
     } 
    } 
} 

public int getID(){ 
    return 1; 
} 
} 

Answer 1

在您实际角色的移动，检查下一个位置是“空”和边界之内（你实际上是如何实现这取决于你如何实现你的房屋和墙壁），如果它只是移动的字符是。

对于实现，您可能需要遍历每个“对象”并检查角色的新位置是否在其中。