Unity3D之获取BoxCollider八个点的世界座标

我们想把场景中的BoxCollider的座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，并且有座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的座标。旋转、缩放都可以计算出正确的座标点来。

 

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using UnityEngine; using System.Collections;    public class Test : MonoBehaviour {     //8个标志位 ，用来在scene里预览     public Transform[] points;     //需要提取Boxcollier顶点的对象     public BoxCollider cube;           void Start()     {         //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;         }     }        void Update()     {         Vector3 [] veces = GetBoxColliderVertexPositions(cube);         for(int i =0; i< veces.Length; i++)         {             points[i].transform.position = veces[i];         }     }        Vector3[] GetBoxColliderVertexPositions (BoxCollider boxcollider)     {         var vertices = new Vector3[8];         //下面4个点         vertices[0] = boxcollider.transform.TransformPoint(boxcollider.center + new Vector3(boxcollider.size.x, -boxcollider.size.y, boxcollider.size.z) * 0.5f);         vertices[1] = boxcollider.transform.TransformPoint( boxcollider.center + new Vector3(-boxcollider.size.x, -boxcollider.size.y, boxcollider.size.z) * 0.5f);         vertices[2] = boxcollider.transform.TransformPoint( boxcollider.center + new Vector3(-boxcollider.size.x, -boxcollider.size.y, -boxcollider.size.z) * 0.5f);         vertices[3] = boxcollider.transform.TransformPoint(boxcollider.center + new Vector3(boxcollider.size.x, -boxcollider.size.y, -boxcollider.size.z) * 0.5f);         //上面4个点         vertices[4] = boxcollider.transform.TransformPoint(boxcollider.center + new Vector3(boxcollider.size.x, boxcollider.size.y, boxcollider.size.z) * 0.5f);         vertices[5] = boxcollider.transform.TransformPoint( boxcollider.center + new Vector3(-boxcollider.size.x, boxcollider.size.y, boxcollider.size.z) * 0.5f);         vertices[6] = boxcollider.transform.TransformPoint( boxcollider.center + new Vector3(-boxcollider.size.x, boxcollider.size.y, -boxcollider.size.z) * 0.5f);         vertices[7] = boxcollider.transform.TransformPoint(boxcollider.center + new Vector3(boxcollider.size.x, boxcollider.size.y, -boxcollider.size.z) * 0.5f);            return vertices;     } }

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