Transform.InverseTransformPoint

Description

将 position 从世界空间变换到本地空间。

该函数基本上与 Transform.TransformPoint 相反，后者用于从本地空间转换到世界空间。

注意，返回的位置受缩放影响。如果要处理方向矢量而不是位置，请使用 Transform.InverseTransformDirection。

// Calculate the transform's position relative to the camera.
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    public Transform cam;
    public Vector3 cameraRelative;

    void Start()
    {
        cam = Camera.main.transform;
        Vector3 cameraRelative = cam.InverseTransformPoint(transform.position);

        if (cameraRelative.z > 0)
            print("The object is in front of the camera");
        else
            print("The object is behind the camera");
    }
}

Description

将位置 z、z、z 从世界空间变换到本地空间。与 Transform.TransformPoint 相反。

注意，返回的位置受缩放影响。如果要处理方向，请使用 Transform.InverseTransformDirection。

// Calculate the world origin relative to this transform.
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour
{
    void Start()
    {
        Vector3 relativePoint = transform.InverseTransformPoint(0, 0, 0);

        if (relativePoint.z > 0)
            print("The world origin is in front of this object");
        else
            print("The world origin is behind of this object");
    }
}