Question

所以我正在研究基于this blog的碰撞系统，虽然有一些小的改动，因为我对该代码有一些问题，并且它的工作对所有情况都很好，除了从下面来，这里有一些截图（绿色在分辨率之前，红色在之后）： right top left 以下是问题所在： bottom

这是我的代码（对不起它的杂乱和未经优化，我计划在我理解算法后重写它）：

public function ResolveCollision(a : CollisionComponent, b : CollisionComponent)
    {
        var aAABB = new AABB(new Point(a.GetBounds().x, a.GetBounds().y), 
                            new Point(a.GetBounds().x + a.GetBounds().width, 
                            a.GetBounds().y + a.GetBounds().height));
        var bAABB = new AABB(new Point(b.GetBounds().x, b.GetBounds().y), 
                            new Point(b.GetBounds().x + b.GetBounds().width, 
                            a.GetBounds().y + a.GetBounds().height));

        var direction : Point = new Point();
        direction.x = aAABB.topLeft.x - bAABB.topLeft.x;
        direction.y = aAABB.topLeft.y - bAABB.topLeft.y;

        var end : AABB = new AABB();    
        end.bottomRight.x = Math.min(aAABB.bottomRight.x, bAABB.bottomRight.x);
        end.bottomRight.y = Math.min(aAABB.bottomRight.y, bAABB.bottomRight.y);

        end.topLeft.x = Math.max(aAABB.topLeft.x, bAABB.topLeft.x);
        end.topLeft.y = Math.max(aAABB.topLeft.y, bAABB.topLeft.y);

        var overlap : Point = new Point();
        overlap.x = end.bottomRight.x - end.topLeft.x;
        overlap.y = end.bottomRight.y - end.topLeft.y;

        var moveAxis : Int; //0:x, 1:y
        if (overlap.x < overlap.y)
        {
            moveAxis = 0;
        }
        else
        {
            moveAxis = 1;
        }

        if (moveAxis == 0)
        {
            a.Move(new Point(sign(direction.x) * overlap.x, 0));
        }
        else if (moveAxis == 1)
        {
            a.Move(new Point(0, sign(direction.y) * overlap.y));
        }
    }

    private function sign(i : Float) : Int
    {
        if (i < 0)
        {   
            return -1;
        }
        else if ( i > 0)
        {
            return 1;
        }
        else
        {
            return 0;
        }
    }

如果有人能指出我的问题，那就太好了，如果没有，我觉得我很清楚它能够以更简单的方式写出来，并且可能找出原因......

感谢，尼科

Answer 1

哎呀，这是AABB创作中的一个愚蠢的错误（当然我没有检查），我正在将一些“b”框属性初始化为“a”框的那些：

 var bAABB = new AABB(new Point(b.GetBounds().x, b.GetBounds().y), 
                            new Point(b.GetBounds().x + b.GetBounds().width, 
                            **a.GetBounds()**.y + **a.GetBounds()**.height));

2D碰撞解决问题

1 个答案: