Camera.ViewportPointToRay 视窗位置转射线


function ViewportPointToRay (position : Vector3) : Ray

Description描述

Returns a ray going from camera through a viewport point.

返回从相机出发穿过视点的一个射线。

Resulting ray is in world space, starting on the near plane of the camera and going through  position's (x,y) coordinates on the viewport (position.z is ignored).

产生的射线是在世界空间中，从相机的近裁剪面开始并穿过视口POSITION(x,y)坐标（position.z被忽略）

Viewport coordinates are normalized and relative to the camera. The bottom-left of the camera is (0,0); the top-right is (1,1).

视窗坐标被规范化，并相对于相机。相机的左下为（0,0）；右上是（1,1）。

  • C#

  • JavaScript

using UnityEngine;using System.Collections;public class example : MonoBehaviour {    void Update() {        Ray ray = camera.ViewportPointToRay(new Vector3(0.5F, 0.5F, 0));        RaycastHit hit;        if (Physics.Raycast(ray, out hit))            print("I'm looking at " + hit.transform.name);        else            print("I'm looking at nothing!");    }}
// Prints the name of the object camera is directly looking at//打印相机直接看到物体名称function Update () {// Get the ray going through the center of the screen//获取穿过屏幕中心的射线var ray : Ray = camera.ViewportPointToRay (Vector3(0.5,0.5,0));// Do a raycast//投射var hit : RaycastHit;if (Physics.Raycast (ray, hit))print ("I'm looking at " + hit.transform.name);elseprint ("I'm looking at nothing!");}


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