| pos | A 3D point, with the x and y coordinates containing a 2D screenspace point in pixels. The lower left pixel of the screen is (0,0). The upper right pixel of the screen is (screen width in pixels - 1, screen height in pixels - 1). Unity ignores the z coordinate. |
| eye | 可选参数，可用于指定要使用的眼睛变换。默认值为 Mono。 |
返回从摄像机通过屏幕点的光线。
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.
//Attach this script to your Camera //This draws a line in the Scene view going through a point 200 pixels from the lower-left corner of the screen //To see this, enter Play Mode and switch to the Scene tab. Zoom into your Camera's position. using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { Camera cam; Vector3 pos = new Vector3(200, 200, 0);
void Start() { cam = GetComponent<Camera>(); }
void Update() { Ray ray = cam.ScreenPointToRay(pos); Debug.DrawRay(ray.origin, ray.direction * 10, Color.yellow); } }