Unity3D摄像机，键盘控制前后左右上下移动，鼠标控制旋转、放缩
Unity3D中运行场景时，实现摄像机的前、后、左、右、上、下，以及鼠标滚轮的放缩，鼠标右键的旋转操作。亲测有效，可供参考。
按键功能介绍：W——前；S——后；A——左；D——右；Q——下降；E——上升；鼠标右键——旋转；鼠标滚轮——放缩。
Tourcamera脚本需要挂在摄像机组件上。
using System.Collections;using System.Collections.Generic;using UnityEngine;public class Tourcamera : MonoBehaviour{ public Transform tourCamera; #region 相机移动参数 public float moveSpeed = 1.0f; public float rotateSpeed = 90.0f; public float shiftRate = 2.0f;// 按住Shift加速 public float minDistance = 0.5f;// 相机离不可穿过的表面的最小距离（小于等于0时可穿透任何表面） #endregion #region 运动速度和其每个方向的速度分量 private Vector3 direction = Vector3.zero; private Vector3 speedForward; private Vector3 speedBack; private Vector3 speedLeft; private Vector3 speedRight; private Vector3 speedUp; private Vector3 speedDown; #endregion void Start() { if (tourCamera == null) tourCamera = gameObject.transform; // 防止相机边缘穿透 //if (tourCamera.GetComponent().nearClipPlane > minDistance / 3) //{ // tourCamera.GetComponent().nearClipPlane /= 3; //} } void Update() { GetDirection(); // 检测是否离不可穿透表面过近 RaycastHit hit; while (Physics.Raycast(tourCamera.position, direction, out hit, minDistance)) { // 消去垂直于不可穿透表面的运动速度分量 float angel = Vector3.Angle(direction, hit.normal); float magnitude = Vector3.Magnitude(direction) * Mathf.Cos(Mathf.Deg2Rad * (180 - angel)); direction += hit.normal * magnitude; } tourCamera.Translate(direction * moveSpeed * Time.deltaTime, Space.World); } private void GetDirection() { #region 加速移动 if (Input.GetKeyDown(KeyCode.LeftShift)) moveSpeed *= shiftRate; if (Input.GetKeyUp(KeyCode.LeftShift)) moveSpeed /= shiftRate; #endregion #region 键盘移动 // 复位 speedForward = Vector3.zero; speedBack = Vector3.zero; speedLeft = Vector3.zero; speedRight = Vector3.zero; speedUp = Vector3.zero; speedDown = Vector3.zero; // 获取按键输入 if (Input.GetKey(KeyCode.UpArrow) || Input.GetKey(KeyCode.W)) speedForward = tourCamera.forward; if (Input.GetKey(KeyCode.DownArrow) || Input.GetKey(KeyCode.S)) speedBack = -tourCamera.forward; if (Input.GetKey(KeyCode.LeftArrow) || Input.GetKey(KeyCode.A)) speedLeft = -tourCamera.right; if (Input.GetKey(KeyCode.RightArrow) || Input.GetKey(KeyCode.D)) speedRight = tourCamera.right; if (Input.GetKey(KeyCode.E)) speedUp = Vector3.up; if (Input.GetKey(KeyCode.Q)) speedDown = Vector3.down; direction = speedForward + speedBack + speedLeft + speedRight + speedUp + speedDown; #endregion #region 鼠标旋转 if (Input.GetMouseButton(1)) { // 转相机朝向 tourCamera.RotateAround(tourCamera.position, Vector3.up, Input.GetAxis("Mouse X") * rotateSpeed * Time.deltaTime); tourCamera.RotateAround(tourCamera.position, tourCamera.right, -Input.GetAxis("Mouse Y") * rotateSpeed * Time.deltaTime); // 转运动速度方向 direction = V3RotateAround(direction, Vector3.up, Input.GetAxis("Mouse X") * rotateSpeed * Time.deltaTime); direction = V3RotateAround(direction, tourCamera.right, -Input.GetAxis("Mouse Y") * rotateSpeed * Time.deltaTime); } #endregion #region 鼠标滚轮效果 if (Input.GetAxis("Mouse ScrollWheel") < 0) { if (Camera.main.fieldOfView <= 100) Camera.main.fieldOfView += 2; if (Camera.main.orthographicSize <= 20) Camera.main.orthographicSize += 0.5F; } //Zoom in if (Input.GetAxis("Mouse ScrollWheel") > 0) { if (Camera.main.fieldOfView > 2) Camera.main.fieldOfView -= 2; if (Camera.main.orthographicSize >= 1) Camera.main.orthographicSize -= 0.5F; } #endregion } public Vector3 V3RotateAround(Vector3 source, Vector3 axis, float angle) { Quaternion q = Quaternion.AngleAxis(angle, axis);// 旋转系数 return q * source;// 返回目标点 }}