Talk about the parameters of the problem DrawMeshInstancedIndirect

https://blog.csdn.net/wodownload2/article/details/103705433
https://docs.unity3d.com/ScriptReference/Graphics.DrawMeshInstancedIndirect.html

In the above blog, I mainly copied the example of the official, experiment a bit, but there are still many questions.
This section focuses on two issues:
1, the transmission data of
the transmission 2, the parameter data

When using DrawMeshInstancedIndirect function, do not understand the meaning of each parameter:

public static void DrawMeshInstancedIndirect(
Mesh mesh, int submeshIndex, Material material, Bounds bounds, ComputeBuffer bufferWithArgs, 
[Internal.DefaultValue("0")] int argsOffset, 
[Internal.DefaultValue("null")] MaterialPropertyBlock properties, 
[Internal.DefaultValue("ShadowCastingMode.On")] ShadowCastingMode castShadows, 
[Internal.DefaultValue("true")] bool receiveShadows, 
[Internal.DefaultValue("0")] int layer, 
[Internal.DefaultValue("null")] Camera camera, 
[Internal.DefaultValue("LightProbeUsage.BlendProbes")] LightProbeUsage lightProbeUsage, 
[Internal.DefaultValue("null")] LightProbeProxyVolume lightProbeProxyVolume
);

Now I will be practical examples to answer this question.

1, ready to draw grass data
2, setup parameters Videos grass
3, prepared grass shader
. 4, C # pass data to shader

code None property pages:
https://stackoverflow.com/questions/24512841/unity3d-unsafe-code- --unsafe-at The The requires the Command-Line-the Option-to-BE-specified
https://answers.unity.com/questions/804103/how-to-enable-unsafe-and-use-pointers.html

Graphics.DrawMeshInstancedIndirect(
            info.mesh, 				//要画的mesh
            0, 						//要画的mesh的，submesh索引
            info.mat, 				//要使用什么材质求画
            info.mesh.bounds,		//画的东西的包围盒
            info.argBuffer,			//要画的东西的参数buffer，这个后面会详细说怎么设置
            info.argOffset,			//这个是参数buffer的偏移
            info.mpb,				//画的材质的参数
            ShadowCastingMode.Off,	//释放阴影，也可以释放
            false,					//不接受阴影，也可以接受
            0,						//所属的层，是哪个层级
            null,					//为null，则画所有的相机
            LightProbeUsage.BlendProbes,	//probe的使用，不详
            null);							//volume probe的使用，不详