将scene加入seting build，实现页面切换
实现通过页面下标切换场景,使用 SceneManagement特性
using System.Diagnostics;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
public class change_btn : MonoBehaviour
{
[Tooltip("true为上，false为下，跳转场景index")]
public void change_scene(bool is_up)
{
int scenenum = SceneManager.sceneCountInBuildSettings;
int curindex = SceneManager.GetActiveScene().buildIndex;
UnityEngine.Debug.Log(scenenum);
if (is_up && curindex+1>=scenenum) return;
if (!is_up &&curindex<=0) return;
if (is_up) SceneManager.LoadScene(curindex + 1);
else SceneManager.LoadScene(curindex - 1);
}
}在屏幕上显示一个文字
首先，创建一个Canvas，并将其Render Mode设置为World Space。然后，将Canvas的Event Camera设置为游戏运行时所用的相机。接着，通过调整Canvas的Rect Transform组件的Width, Height, Scale属性，使其大小在世界空间中合适1。
在Canvas下创建UI元素，例如Image或Text。可以使用TextMeshPro来创建文字元素，并设置AutoSize，使文字自适应大小。最后，编写一个C#脚本，将Canvas的世界坐标设置为游戏物体的坐标，欧拉角设置为相机的欧拉角1。
using UnityEngine;
public class DisplayText : MonoBehaviour
{
public GameObject targetObject; // 目标物体
public Canvas canvas; // Canvas对象
void Update()
{
// 将Canvas的位置设置为目标物体的位置
canvas.transform.position = targetObject.transform.position;
// 将Canvas的旋转设置为相机的旋转
canvas.transform.rotation = Camera.main.transform.rotation;
}
}使用鼠标悬浮事件
另一种方法是使用鼠标悬浮事件来显示文字信息。可以通过实现IPointerEnterHandler和IPointerExitHandler接口来检测鼠标进入和离开物体的事件2。
using UnityEngine;
using UnityEngine.EventSystems;
using UnityEngine.UI;
public class HoverText : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler
{
public Text hoverText; // 显示文字的Text对象
public void OnPointerEnter(PointerEventData eventData)
{
hoverText.gameObject.SetActive(true); // 显示文字
}
public void OnPointerExit(PointerEventData eventData)
{
hoverText.gameObject.SetActive(false); // 隐藏文字
}
}在3D对象上显示文字
在3D对象上显示文字，可以通过在NGUI中创建一个UILabel或Sprite，然后在3D对象上创建一个空物体，将UI文字显示在该位置。通过控制显示位置到相机的距离，对UI对象进行缩放，实现近大远小的效果3。
using UnityEngine;
public class BuildHeadWord : MonoBehaviour
{
public GameObject head; // 头顶的点
public Transform ui; // 头顶的字
private float baseFomat; // 默认字与摄像机的距离
private float currentFomat; // 当前相机的距离
private float scale;
void Start()
{
baseFomat = Vector3.Distance(head.transform.position, Camera.main.transform.position);
scale = 1 - ui.localScale.x; // 默认缩放差值
currentFomat = 0;
}
void Update()
{
if (baseFomat != currentFomat)
{
currentFomat = Vector3.Distance(head.transform.position, Camera.main.transform.position);
float myscale = baseFomat / currentFomat - scale; // 计算出缩放比例
ui.position = WorldToUI(head.transform.position); // 计算UI显示的位置
ui.localScale = Vector3.one * myscale; // 缩放UI
}
}
public static Vector3 WorldToUI(Vector3 point)
{
Vector3 pt = Camera.main.WorldToScreenPoint(point); // 将世界坐标转换为视口坐标
Vector3 ff = UICamera.currentCamera.ScreenToWorldPoint(pt); // 将视口坐标转换为世界坐标
ff.z = 0;
return ff;
}
}摄像机的自由移动
//==========================
// - FileName: CameraControl.cs
// - Created: yeyuotc
// - CreateTime: #CreateTime#
// - Email: 1079221637@qq.com
// - Description:
//==========================
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class CameraControl: 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<Camera>().nearClipPlane > minDistance / 3)
//{
// tourCamera.GetComponent<Camera>().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
}
}