CommandBuffer Begin is a method in the Unity engine that allows the creation and execution of custom commands. The Begin method starts recording a new set of custom commands that can be executed later on. This can be useful for optimizing rendering performance, as custom commands can be executed without the overhead of the regular rendering pipeline.
Here are a few examples of how to use CommandBuffer Begin in C#:
Example 1: Drawing a Mesh // Get the CommandBuffer for the current camera. CommandBuffer cmd = new CommandBuffer(); Camera.main.AddCommandBuffer(CameraEvent.AfterSkybox, cmd);
// Begin a new set of custom commands. cmd.Begin();
// Draw a mesh. cmd.DrawMesh(someMesh, someMatrix, someMaterial);
// End the set of custom commands. cmd.End();
This example shows how to use CommandBuffer Begin to draw a mesh. After creating a new CommandBuffer, the Begin method is called to start a new set of commands. A mesh is drawn using the DrawMesh method, and the set of commands is ended using the End method.
Package Library: UnityEngine.Rendering.
Example 2: Clearing a Render Texture CommandBuffer cmd = new CommandBuffer(); Camera.main.AddCommandBuffer(CameraEvent.AfterSkybox, cmd);
cmd.Begin();
// Clear a render texture. cmd.ClearRenderTarget(true, true, Color.black, 1.0f);
cmd.End();
This example shows how to use CommandBuffer Begin to clear a render texture. After creating a new CommandBuffer, the Begin method is called to start a new set of commands. The ClearRenderTarget method is used to clear the render texture, and the set of commands is ended using the End method.
Package Library: UnityEngine.Rendering.
Example 3: Setting a Global Shader Property CommandBuffer cmd = new CommandBuffer(); Camera.main.AddCommandBuffer(CameraEvent.AfterSkybox, cmd);
cmd.Begin();
// Set a global shader property. cmd.SetGlobalFloat("_MyValue", 1.0f);
cmd.End();
This example shows how to use CommandBuffer Begin to set a global shader property. After creating a new CommandBuffer, the Begin method is called to start a new set of commands. The SetGlobalFloat method is used to set the "_MyValue" property to 1.0f, and the set of commands is ended using the End method.
Package Library: UnityEngine.Rendering.
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