Legacy Documentation: Version 2017.1 (Go to current version)
LanguageEnglish
  • C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.

Camera.ScreenPointToRay

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

Switch to Manual
public function ScreenPointToRay(position: Vector3): Ray;
public Ray ScreenPointToRay(Vector3 position);

Description

Returns a ray going from camera through a screen point.

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

Screenspace is defined in pixels. The bottom-left of the screen is (0,0); the right-top is (pixelWidth,pixelHeight).

#pragma strict
// Draws a line in the scene view going through a point 200 pixels
// from the lower-left corner of the screen
var cam: Camera;
function Start() {
	cam = GetComponent.<Camera>();
}
function Update() {
	var ray: Ray = cam.ScreenPointToRay(new Vector3(200, 200, 0));
	Debug.DrawRay(ray.origin, ray.direction * 10, Color.yellow);
}
// Draws a line in the scene view going through a point 200 pixels
// from the lower-left corner of the screen
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { Camera cam;

void Start() { cam = GetComponent<Camera>(); }

void Update() { Ray ray = cam.ScreenPointToRay(new Vector3(200, 200, 0)); Debug.DrawRay(ray.origin, ray.direction * 10, Color.yellow); } }
对文档有任何疑问,请移步至开发者社区提问,我们将尽快为您解答