定义一系列描述 Unity 如何渲染帧的命令和设置。
| disposed | 当 RenderPipeline 无效或被销毁时，返回 true。 |
| ProcessRenderRequests | Executes RenderRequests submitted using Camera.SubmitRenderRequests. |
| Render | Entry point method that defines custom rendering for this RenderPipeline. |
| BeginCameraRendering | Calls the RenderPipelineManager.beginCameraRendering delegate. |
| BeginFrameRendering | Calls the RenderPipelineManager.beginFrameRendering delegate. |
| EndCameraRendering | Calls the RenderPipelineManager.endCameraRendering delegate. |
| EndFrameRendering | Calls the RenderPipelineManager.endFrameRendering delegate. |