eye | 可选参数,可用于指定要使用的眼睛变换。默认值为 Mono。 |
返回从摄像机通过视口点的光线。
产生的光线位于世界空间中,从摄像机的近平面开始,并通过视口上
位置的 (x,y) 坐标(忽略 position.z)。
视口坐标是标准化的、相对于摄像机的坐标。摄像机左下角为 (0,0),右上角为 (1,1)。
// Prints the name of the object camera is directly looking at using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { Camera cam;
void Start() { cam = GetComponent<Camera>(); }
void Update() { Ray ray = cam.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!"); } }
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