screenToWorldPoint 마우스 컨트롤 위치로 gameobject움직이기

카메라 모드를 orthographic으로 해두어야 된다. 

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class mousePosInteractor : MonoBehaviour
{
    private Vector2 cursorPos;

    void Update()
    {
        transform.position = new Vector3(cursorPos.x, cursorPos.y, transform.position.z);
    }

    void OnGUI()
    {
        Vector3 p = new Vector3();
        Camera c = Camera.main;
        Event e = Event.current;
        Vector2 mousePos = new Vector2();

        mousePos.x = e.mousePosition.x;
        mousePos.y = c.pixelHeight - e.mousePosition.y;

        p = c.ScreenToWorldPoint(new Vector3(mousePos.x, mousePos.y, c.nearClipPlane + 14));

        cursorPos.x = p.x;
        cursorPos.y = p.y;
    }
}