使用 Libgdx 的圆和多边形碰撞

2022-01-12 00:00:00 geometry polygon collision-detection java libgdx

Libgdx 中有没有办法验证多边形和圆之间的碰撞?

Is there a way in Libgdx to verify a collision between a Polygon and a Circle?

我看到了 Intersector 类，但只发现了 Circle 和 Rectangle 的碰撞测试.其他多边形呢?

I saw the Intersector class but only found collision test for Circle and Rectangle. What about any other Polygon?

如果我需要手动完成，使用 Libgdx 的最佳方法是什么?

If I need to do it manually, what's the best way to do that using Libgdx?

推荐答案

所以，我设法在 Circle 和 Polygon 之间创建了一个碰撞测试方法.至少，它对我有用.

So, I managed to create a collision test method between a Circle and a Polygon. At least, it works for me.

代码如下:

public boolean overlaps(Polygon polygon, Circle circle) {
    float []vertices=polygon.getTransformedVertices();
    Vector2 center=new Vector2(circle.x, circle.y);
    float squareRadius=circle.radius*circle.radius;
    for (int i=0;i<vertices.length;i+=2){
        if (i==0){
            if (Intersector.intersectSegmentCircle(new Vector2(vertices[vertices.length-2], vertices[vertices.length-1]), new Vector2(vertices[i], vertices[i+1]), center, squareRadius))
                return true;
        } else {
            if (Intersector.intersectSegmentCircle(new Vector2(vertices[i-2], vertices[i-1]), new Vector2(vertices[i], vertices[i+1]), center, squareRadius))
                return true;
        }
    }
    return false;
}

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