Unity3D之獲取BoxCollider八個點的世界座標

我們想把場景中的BoxCollider的座標點導出出來讓服務器也能用。雖然BoxCollider自身的大小可以獲取出來，但是如果有父對象，並且有座標的變化那算起來就比較麻煩了。還好unity提供了一個方法，真的很便捷。如下圖所示，我用了8個標記點來標記獲取到的boxcollider的座標。旋轉、縮放都可以計算出正確的座標點來。

 

[C#] 純文本查看 複製代碼

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using UnityEngine; using System.Collections;    public class Test : MonoBehaviour {     //8個標誌位 ，用來在scene裏預覽     public Transform[] points;     //需要提取Boxcollier頂點的對象     public BoxCollider cube;           void Start()     {         //父節只能調節位置， 不能調節旋轉和縮放。         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個點         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個點         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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