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XCEngine/docs/api/rhi/command-list/set-scissor-rect.md

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# RHICommandList::SetScissorRect
```cpp
virtual void SetScissorRect(const Rect& rect) = 0;
```
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设置裁剪矩形。超出该矩形区域的像素将被丢弃。此操作用于实现遮罩、屏幕空间裁剪等效果。
**参数:**
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- `rect` - 裁剪矩形结构体(包含 left、top、right、bottom单位为像素
**返回:** `void`
**异常:** 无
**线程安全:** ❌
**复杂度:** O(1)
**示例:**
```cpp
Rect rect;
rect.left = 0;
rect.top = 0;
rect.right = 640;
rect.bottom = 480;
cmdList->SetScissorRect(rect);
```
## 相关文档
- [RHICommandList 总览](command-list.md) - 返回类总览
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- [SetScissorRects](set-scissor-rects.md) - 设置多个裁剪矩形
- [SetViewport](set-viewport.md) - 设置视口