collisionbounds.java

一个java的免费游戏引擎,里面有文档,和例子

// Decompiled by Jad v1.5.7g. Copyright 2000 Pavel Kouznetsov.
// Jad home page: http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi 

package com.golden.gamedev.object.collision;

import com.golden.gamedev.object.*;
import java.awt.Rectangle;

// Referenced classes of package com.golden.gamedev.object.collision:
//            CollisionRect, CollisionShape

public abstract class CollisionBounds extends CollisionManager
{

    public static final int LEFT_COLLISION = 1;
    public static final int RIGHT_COLLISION = 2;
    public static final int TOP_COLLISION = 4;
    public static final int BOTTOM_COLLISION = 8;
    private static final SpriteGroup e = new SpriteGroup("Dummy");
    private final Rectangle f;
    private Sprite g;
    private int h;
    private int i;
    private int j;
    protected final CollisionRect rect1;

    public CollisionBounds(int k, int l, int i1, int j1)
    {
        f = new Rectangle();
        rect1 = new CollisionRect();
        f.setBounds(k, l, i1, j1);
    }

    public CollisionBounds(Background background)
    {
        f = new Rectangle();
        rect1 = new CollisionRect();
        f.setBounds(0, 0, background.getWidth(), background.getHeight());
    }

    public void setCollisionGroup(SpriteGroup spritegroup, SpriteGroup spritegroup1)
    {
        super.setCollisionGroup(spritegroup, e);
    }

    public void checkCollision()
    {
        SpriteGroup spritegroup;
        if(!(spritegroup = getGroup1()).isActive()) goto _L2; else goto _L1
_L1:
        Sprite asprite[];
        int k;
        int l;
        asprite = spritegroup.getSprites();
        k = spritegroup.getSize();
        l = 0;
          goto _L3
_L6:
        CollisionShape collisionshape;
        CollisionShape collisionshape1;
        g = asprite[l];
        if(!g.isActive())
            continue; /* Loop/switch isn't completed */
        collisionshape1 = getCollisionShape1(g);
        collisionshape1;
        collisionshape = collisionshape1;
        JVM INSTR ifnull 331;
           goto _L4 _L5
_L4:
        break MISSING_BLOCK_LABEL_60;
_L5:
        continue; /* Loop/switch isn't completed */
        h = 0;
        i = (int)g.getX();
        j = (int)g.getY();
        if(collisionshape.getX() < (double)f.x)
        {
            i = f.x;
            h |= 0x1;
        }
        if(collisionshape.getY() < (double)f.y)
        {
            j = f.y;
            h |= 0x4;
        }
        if(collisionshape.getX() + (double)collisionshape.getWidth() > (double)(f.x + f.width))
        {
            i = (f.x + f.width) - collisionshape.getWidth();
            h |= 0x2;
        }
        if(collisionshape.getY() + (double)collisionshape.getHeight() > (double)(f.y + f.height))
        {
            j = (f.y + f.height) - collisionshape.getHeight();
            h |= 0x8;
        }
        if(h != 0)
            collided(g);
        l++;
_L3:
        if(l < k) goto _L6; else goto _L2
_L2:
    }

    public void revertPosition1()
    {
        g.forceX(i);
        g.forceY(j);
    }

    public CollisionShape getCollisionShape1(Sprite sprite)
    {
        rect1.setBounds(sprite.getX(), sprite.getY(), sprite.getWidth(), sprite.getHeight());
        return rect1;
    }

    public boolean isCollisionSide(int k)
    {
        return (h & k) != 0;
    }

    public void setBoundary(int k, int l, int i1, int j1)
    {
        f.setBounds(k, l, i1, j1);
    }

    public Rectangle getBoundary()
    {
        return f;
    }

    public abstract void collided(Sprite sprite);

}