unity 实现放大镜效果代码
时间: 2023-03-19 19:22:01 浏览: 293
下面是使用 Unity 实现放大镜效果的代码示例:
```csharp
using UnityEngine;
public class MagnifyingGlass : MonoBehaviour
{
public float magnification = 2.0f; // 放大镜的放大倍数
public float radius = 50.0f; // 放大镜的半径
private Texture2D texture; // 存储放大后的图像的纹理
private Rect rect; // 放大镜的矩形区域
void Start()
{
// 创建一个空的纹理来存储放大后的图像
texture = new Texture2D((int)radius * 2, (int)radius * 2, TextureFormat.RGB24, false);
// 设置放大镜的矩形区域
rect = new Rect(0, 0, radius * 2, radius * 2);
}
void OnGUI()
{
// 获取鼠标当前位置
Vector2 mousePos = Event.current.mousePosition;
// 在放大镜中心点周围创建一个裁剪区域
Rect clipRect = new Rect(mousePos.x - radius, Screen.height - mousePos.y - radius, radius * 2, radius * 2);
// 用裁剪区域的内容填充纹理
texture.ReadPixels(clipRect, 0, 0);
// 缩放纹理以进行放大
texture.Apply();
GUI.DrawTexture(rect, texture, ScaleMode.ScaleToFit);
// 绘制放大镜的边框
GUI.Box(new Rect(mousePos.x - radius, Screen.height - mousePos.y - radius, radius * 2, radius * 2), "");
}
}
```
该代码使用 `OnGUI()` 方法来绘制放大镜效果。在 `Start()` 方法中,它创建了一个空的纹理来存储放大后的图像,并设置了放大镜的矩形区域。在 `OnGUI()` 方法中,它获取鼠标当前位置,创建一个裁剪区域,然后用裁剪区域的内容填充纹理并缩放纹理以进行放大。最后,它绘制放大镜的边框。
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