unity 相机截图

/// <summary>

/// 针对相机的截图

/// </summary>

public void CameraScreenShot(){

Rect rect = new Rect(0,0,Screen.width,Screen.height);

RenderTexture renderTexture = RenderTexture.GetTemporary((int)rect.width,(int)rect.height,0, RenderTextureFormat.ARGB32);

#region 默认内置渲染管线或者urp渲染管线（相机都是Base模式），多个相机截图的顺序是depth越小越在前渲染，如下，最终就是两个相机的画面结合

// Camera.main.targetTexture = renderTexture;

// Camera.main.Render();

// camera.targetTexture = renderTexture;

// camera.Render();

#endregion

#region urp渲染管线(base和overlay两种相机) 多个相机截图的顺序是先渲染overlay的相机再是Base的相机。如下,最终就是两个相机的画面结合

// camera.targetTexture = renderTexture;

// camera.Render();

Camera.main.targetTexture = renderTexture;

Camera.main.Render();

#endregion

RenderTexture.active = renderTexture;

Texture2D texture2D = new Texture2D((int)rect.width,(int)rect.height,TextureFormat.ARGB32,false);

texture2D.ReadPixels(rect,0,0);

texture2D.Apply(false);

Camera.main.targetTexture = null;

camera.targetTexture = null;

RenderTexture.active = null;

image.sprite = Sprite.Create(texture2D,rect,new Vector2(0.5f,0.5f));

RenderTexture.ReleaseTemporary(renderTexture);

}

在这里只是记录一下多相机截图并不包含保存、加入文字水印等方式