【Unity开发】Unity实现对模型移动、缩放、旋转操作的功能_unity 模型旋转

一、效果展示

Unity实现模型移动、旋转和缩放功能

通过鼠标实现对模型的不同操作
鼠标中键点击，模型变为高亮状态，表示选中状态，再次点击其他地方，则取消高亮，表示未选中状态
鼠标中键上下滚动，实现模型的缩放
鼠标左键点击或长按，实现模型的移动
鼠标右键点击，左右滑动，实现模型的水平旋转；同时按下shift键，上下滑动，实现模型垂直旋转

二、实现完整代码

using System.Collections;using System.Collections.Generic;using UnityEngine;public class ModelControl : MonoBehaviour{ private Material originalMaterial; //模型原始材质 private Material highlightMaterial; //模型选中时的高亮材质 private Renderer myRenderer; //模型渲染组件 private bool isSelect = false; //模型是否被旋转 // Start is called before the first frame update void Start() { //确保模型在地面上方 KeepOnGround(); //新建一个高亮材质 highlightMaterial = new Material(Shader.Find(\"Universal Render Pipeline/Lit\")); highlightMaterial.color = Color.yellow; highlightMaterial.SetFloat(\"_Smoothness\", 0.8f); highlightMaterial.SetColor(\"_EmissionColor\", Color.yellow * 1.2f); // 开启自发光 //获取原始材质 myRenderer = GetComponent<Renderer>(); if (myRenderer != null) { originalMaterial = myRenderer.material; } //判断是否包含碰撞体组件，不包含直接添加 if (GetComponent<Collider>() == null) { gameObject.AddComponent<BoxCollider>(); } } // Update is called once per frame void Update() { if (Input.GetMouseButton(0)&&isSelect) { //鼠标左键控制移动 Drag(); } if (Input.GetMouseButton(1)&&isSelect) { //鼠标右键控制旋转 Rotate(); } float scroll = Input.GetAxis(\"Mouse ScrollWheel\"); if (Mathf.Abs(scroll) > 0.01f&&isSelect) { // 鼠标中键滚轮：缩放模型 Scale(scroll); } if (Input.GetMouseButton(2)) { //鼠标中键点击，进行模型选中 Select(); } } /// 
 /// 模型选中方法 选中显示高亮 否则选择原始材质 ///  public void Select() { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); if (Physics.Raycast(ray, out RaycastHit hit)) { //鼠标点击到模型 if (hit.collider.gameObject == this.gameObject) { myRenderer.material = highlightMaterial; isSelect = true; } else { //点击到别的模型 myRenderer.material = originalMaterial; isSelect = false; } } else { //点击到空白处 myRenderer.material = originalMaterial; isSelect = false; } } /// 
 /// 模型移动方法 ///  void Drag() { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); RaycastHit hit; if (Physics.Raycast(ray, out hit)) { if (hit.transform.name == \"Plane\") { this.transform.position = hit.point; KeepOnGround(); } } } /// 
 /// 模型旋转方法 鼠标右键=左右旋转 shift+鼠标右键=上下旋转 ///  void Rotate() {  if (Input.GetKey(KeyCode.LeftShift)) { float rotY = Input.GetAxis(\"Mouse Y\") * 5f; this.transform.Rotate(Vector3.right, rotY, Space.World); } else { float rotX = Input.GetAxis(\"Mouse X\") * 5f; this.transform.Rotate(Vector3.up, rotX, Space.World); } } /// 
 /// 模型缩放方法 ///  /// 缩放倍率 void Scale(float scroll) { float scaleFactor = 1 + scroll; this.transform.localScale *= scaleFactor; KeepOnGround(); } /// 
 /// 确保模型在地面上方，防止穿模 ///  void KeepOnGround() { // 计算当前模型的边界包围盒 Renderer renderer = GetComponentInChildren<Renderer>(); if (renderer != null) { Bounds bounds = renderer.bounds; float bottomY = bounds.min.y; float offsetY = transform.position.y - bottomY; float targetY = 0f; // 地面高度为0（可根据你的地面高度调整） Vector3 pos = transform.position; pos.y += targetY - bottomY; this.transform.position = pos; } }}