Unity - Scripting API: Transform.InverseTransformPoint

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Description

Transforms position from world space to local space.

// 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");
    }
}

Declaration

public Vector3 InverseTransformPoint(float x, float y, float z);

Description

Transforms the position x, y, z from world space to local space.

// 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 this object");
    }
}