Unity 3d角色展示脚本（旋转 平移 缩放）展示界面

不考虑性能 很简陋的一个功能，主要是用于角色渲染的观察用，比simplecontroller要好用一点

using System;
using UnityEngine;

public class CharacterViewer : MonoBehaviour
{
    public Transform target; // 人物模型的Transform
    public float rotationSpeed = 5f;
    public float zoomSpeed = 1f;
    public float panSpeed = 0.001f;
    private Vector3 lastMousePosition;
    

    void Update()
    {
        // 旋转
        if (Input.GetMouseButton(0))
        {
            float mouseX = -Input.GetAxis("Mouse X");
            // float mouseY = Input.GetAxis("Mouse Y");
            target.Rotate(Vector3.up, mouseX * rotationSpeed, Space.World);
            // target.Rotate(Vector3.right, -mouseY * rotationSpeed, Space.Self);
        }

        // 缩放
        float scroll = Input.GetAxis("Mouse ScrollWheel");
        if (scroll != 0)
        {
            Vector3 zoomDirection = transform.forward;
            transform.position += zoomDirection * (scroll * zoomSpeed);
        }

        // 平移
        if (Input.GetMouseButtonDown(2))
        {
            lastMousePosition = Input.mousePosition;
        }
        if (Input.GetMouseButton(2))
        {
            Vector3 delta = Input.mousePosition - lastMousePosition;
            Camera.main.transform.Translate(-delta.x * panSpeed, -delta.y * panSpeed, 0);
            lastMousePosition = Input.mousePosition;
        }
    }
}