precisecollisiongroup$trackrect.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;


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

class TrackRect extends CollisionRect
{

    public double stepX;
    public double stepY;
    public double dx;
    public double dy;
    private final PreciseCollisionGroup e;

    public void setCollisionStep(double d, double d1)
    {
        stepX = d;
        stepY = d1;
        dx = dy = 0.0D;
    }

    public void prevTrack()
    {
        if(dx != 0.0D)
        {
            dx -= stepX;
            x -= stepX;
        }
        if(dy != 0.0D)
        {
            dy -= stepY;
            y -= stepY;
        }
    }

    public void nextTrack()
    {
        x += stepX;
        y += stepY;
        dx += stepX;
        dy += stepY;
    }

    public String toString()
    {
        return super.toString() + " " + "[deltaX=" + dx + ", deltaY=" + dy + ", stepX=" + stepX + ", stepY=" + stepY + "]";
    }

    public TrackRect(PreciseCollisionGroup precisecollisiongroup)
    {
        e = precisecollisiongroup;
    }
}