Camera.ViewportPointToRay 视窗位置转射线

function ViewportPointToRay (position : Vector3) : Ray


Returns a ray going from camera through a viewport point.


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).


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


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 " +;
            print("I'm looking at nothing!");
// Prints the name of the object camera is directly looking at

function Update () {
	// Get the ray going through the center of the screen
	var ray : Ray = camera.ViewportPointToRay (Vector3(0.5,0.5,0));
	// Do a raycast
	var hit : RaycastHit;
	if (Physics.Raycast (ray, hit))
	print ("I'm looking at " +;
	print ("I'm looking at nothing!");
Page last updated: 2012-7-18