Version: 2017.4
public Ray ScreenPointToRay (Vector3 position);



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).

スクリーンスペースはピクセルで定義されます。画面の左下端は (0,0); 右上端は (pixelWidth -1,pixelHeight -1)。

//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;

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); } }