将二维位置/旋转到3D

问题描述 投票:1回答:1

我有一个玩家对象,以及播放器和连接到它作为孩子的一个摄像头。

我想在周围玩家一个圆圈旋转摄像头,使其始终面向玩家(这是在0,0,0中心)。

我有一个2D的做法,我需要3D转换。

将这个脚本是什么样的3D?

谢谢。

 using UnityEngine;
 using System.Collections;

 public class circularMotion : MonoBehaviour {

 public float RotateSpeed;
 public float Radius;

 public Vector2 centre;
 public float angle;

 private void Start()
 {
     centre = transform.localPosition;
 }

 private void Update()
 {

     angle += RotateSpeed * Time.deltaTime;

     var offset = new Vector2(Mathf.Sin(angle), Mathf.Cos(angle)) * Radius;
     transform.localPosition = centre + offset;
 }
 }
c# unity3d math
1个回答
0
投票

那么,一个方法可以是定义一个向上载体中,然后围绕相应轴线旋转。

using UnityEngine;

public class circularMotion : MonoBehaviour
{
    public float RotateSpeed = 1;
    public float Radius = 1;

    public Vector3 centre;
    public float angle;

    public Vector3 upDirection = Vector3.up; // upwards direction of the axis to rotate around

    private void Start()
    {
        centre = transform.localPosition;
    }

    private void Update()
    {
        transform.up = Vector3.up;
        angle += RotateSpeed * Time.deltaTime;

        Quaternion axisRotation = Quaternion.FromToRotation(Vector3.up, upDirection);

        // position camera
        Vector3 offset = axisRotation * new Vector3(Mathf.Sin(angle), 0, Mathf.Cos(angle)) * Radius;
        transform.localPosition = centre + offset;

        // look towards center
        transform.localRotation = axisRotation * Quaternion.Euler(0, 180 + angle * 180 / Mathf.PI, 0);
    }
}
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