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Transformpublic 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;}}
}