Unity3D之获取BoxCollider八个点的世界坐标

来源：互联网发布：淘宝司法拍卖问题编辑：程序博客网时间：2024/06/05 17:35

我们想把场景中的BoxCollider的坐标点导出出来让服务器也能用。虽然BoxCollider自身的大小可以获取出来，但是如果有父对象，并且有坐标的变化那算起来就比较麻烦了。还好unity提供了一个方法，真的很便捷。如下图所示，我用了8个标记点来标记获取到的boxcollider的坐标。旋转、缩放都可以计算出正确的坐标点来。

[C#] 纯文本查看复制代码

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usingUnityEngine;
usingSystem.Collections;
  
publicclass Test : MonoBehaviour 
{
    //8个标志位 ，用来在scene里预览
    publicTransform[] points;
    //需要提取Boxcollier顶点的对象
    publicBoxCollider cube;
  
  
    voidStart()
    {
        //父节只能调节位置， 不能调节旋转和缩放。
        Transform parent = cube.transform.parent;
        while(parent!=null)
        {
            parent.localRotation = Quaternion.Euler(Vector3.zero);
            parent.localScale = Vector3.one;
            parent = parent.parent;
        }
    }
  
    voidUpdate()
    {
        Vector3 [] veces = GetBoxColliderVertexPositions(cube);
        for(inti =0; i< veces.Length; i++)
        {
            points[i].transform.position = veces[i];
        }
    }
  
    Vector3[] GetBoxColliderVertexPositions (BoxCollider boxcollider) 
    {
        var vertices = newVector3[8];
        //下面4个点
        vertices[0] = boxcollider.transform.TransformPoint(boxcollider.center + newVector3(boxcollider.size.x, -boxcollider.size.y, boxcollider.size.z) * 0.5f);
        vertices[1] = boxcollider.transform.TransformPoint( boxcollider.center + newVector3(-boxcollider.size.x, -boxcollider.size.y, boxcollider.size.z) * 0.5f);
        vertices[2] = boxcollider.transform.TransformPoint( boxcollider.center + newVector3(-boxcollider.size.x, -boxcollider.size.y, -boxcollider.size.z) * 0.5f);
        vertices[3] = boxcollider.transform.TransformPoint(boxcollider.center + newVector3(boxcollider.size.x, -boxcollider.size.y, -boxcollider.size.z) * 0.5f);
        //上面4个点
        vertices[4] = boxcollider.transform.TransformPoint(boxcollider.center + newVector3(boxcollider.size.x, boxcollider.size.y, boxcollider.size.z) * 0.5f);
        vertices[5] = boxcollider.transform.TransformPoint( boxcollider.center + newVector3(-boxcollider.size.x, boxcollider.size.y, boxcollider.size.z) * 0.5f);
        vertices[6] = boxcollider.transform.TransformPoint( boxcollider.center + newVector3(-boxcollider.size.x, boxcollider.size.y, -boxcollider.size.z) * 0.5f);
        vertices[7] = boxcollider.transform.TransformPoint(boxcollider.center + newVector3(boxcollider.size.x, boxcollider.size.y, -boxcollider.size.z) * 0.5f);
  
        returnvertices;
    }
}

最后，欢迎大家测试～欢迎在下面给我留言～

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