有关我的Andr​​oid游戏，我用Libgdx，我发现这个code工作正常鲍勃（Omino）和植物（皮安塔）之间的冲突： Assets.class

For my android game I use Libgdx and I detect the collision between Bob (Omino) and Plant (Pianta) with this code that works fine : Assets.class

pianta = new Animation(0.5f,new TextureRegion(items, 160, 384, 64, 96),
                              new TextureRegion(items, 224, 384, 64, 96));

Pianta.class

public class Pianta extends GameObject {
   public static final float PIANTA_WIDTH = 2;
   public static final float PIANTA_HEIGHT = 3;
   public static float stateTime;
   public Pianta(float x, float y) {
      super(x, y, PIANTA_WIDTH, PIANTA_HEIGHT);   
      stateTime = 0;
   }

    public void update(float deltaTime) {
           stateTime += deltaTime;
       }

}

World.class

Pianta pianta1_0 = new Pianta(x+10,2.2f);
piante.add(pianta1_0);

private void collisionPiante(){
      int len = piante.size();
      for(int i=0;i<len;i++){
         if(OverlapTester.overlapRectangles(piante.get(i).bounds,omino.bounds)){
            omino.ominoMorto();
         }
      }
   }

WorldRender.class

private void renderPiante() {
      TextureRegion keyFrame;
      int len = world.piante.size();
        for(int i = 0; i < len; i++) {
            Pianta pianta = world.piante.get(i);            
            keyFrame = Assets.pianta.getKeyFrame(Pianta.stateTime, Animation.ANIMATION_LOOPING);
            batcher.draw(keyFrame,pianta.position.x, pianta.position.y, 2, 3);
        }


   }

但如果你看下面的图片2，可以看到鲍勃击中，但没有用石头（彼得拉）碰撞！这是code：

but if you watch the image 2 below, you can see that Bob hit but there isn't collision with stone (Pietra) !! This is the code :

Assets.class

pietra1 = new TextureRegion(items,288,416,128,64);

Pietra.class

public class Pietra extends GameObject {
   public static float PIETRA_WIDTH = 4;
   public static float PIETRA_HEIGHT = 2;
   public Pietra(float x, float y) {
      super(x, y, PIETRA_WIDTH, PIETRA_HEIGHT);
   }

}

World.class

Pietra pietra1_0 = new Pietra(x+25,2.2f);
pietre.add(pietra1_0);
private void collisionPietre(){
      int len2 = pietre.size();
      for(int l=0;l<len2;l++){
         if(OverlapTester.overlapRectangles(pietre.get(l).bounds,omino.bounds)){
            omino.ominoMorto();
         }
      }   
   }

WorldRender.class

private void renderPietre() {
      int len = world.pietre.size();
        for(int i = 0; i < len; i++) {
            Pietra pietra = world.pietre.get(i);            
           batcher.draw(Assets.pietra1,pietra.position.x, pietra.position.y, 4, 2);
        }
   }

OverlapTester

public class OverlapTester {
    public static boolean overlapRectangles (Rectangle r1, Rectangle r2) {
        if (r1.x < r2.x + r2.width && r1.x + r1.width > r2.x && r1.y < r2.y + r2.height && r1.y + r1.height > r2.y)
            return true;
        else
            return false;
    }

有人能告诉我为什么与工厂碰撞工作正常，并用石头砸鲍勃即使没有碰撞？如可以看到code是相同的，唯一的区别是，植物是动画对象，而石不

Someone can tell me why the collision with the plant works fine and with stone Bob hit even if there is no collision? as you can see the code is the same, the only difference is that the plant is an animated object while the stone isn't.

推荐答案

如果我理解正确的 overla prectangles 检查情况下，如果长方形完全是内部的。这是不是你想要的东西可能。

If I understood right overlapRectangles checks the case if rectangle is totally inside. It is not probably thing you want.

LibGDX有碰撞检测功能特殊。请检查的http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/math/Intersector.html

LibGDX has special functionality for collision checking. Please, check http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/math/Intersector.html