33 lines
822 B
Markdown
33 lines
822 B
Markdown
# RHICommandList::Draw
|
||
|
||
```cpp
|
||
virtual void Draw(uint32_t vertexCount, uint32_t instanceCount = 1, uint32_t startVertex = 0, uint32_t startInstance = 0) = 0;
|
||
```
|
||
|
||
执行非索引绘制调用。从顶点缓冲区按顺序读取顶点数据绘制图元。
|
||
|
||
**参数：**
|
||
- `vertexCount` - 顶点数量
|
||
- `instanceCount` - 实例数量（默认 1）
|
||
- `startVertex` - 起始顶点偏移（默认 0）
|
||
- `startInstance` - 起始实例偏移（默认 0）
|
||
|
||
**返回：** `void`
|
||
|
||
**异常：** 无
|
||
|
||
**线程安全：** ❌
|
||
|
||
**复杂度：** O(vertexCount * instanceCount)
|
||
|
||
**示例：**
|
||
|
||
```cpp
|
||
cmdList->Draw(36); // 绘制36个顶点
|
||
```
|
||
|
||
## 相关文档
|
||
|
||
- [RHICommandList 总览](command-list.md) - 返回类总览
|
||
- [DrawIndexed](draw-indexed.md) - 索引绘制
|
||
- [SetVertexBuffer](set-vertex-buffer.md) - 设置顶点缓冲 |