Indirect Rendering Unity

using UnityEngine;
using System.Collections.Generic;

namespace IndirectDraw
{
    [ExecuteInEditMode]
    public class IndirectRenderingTest : MonoBehaviour
    {
        private bool initialized;

        GraphicsBuffer meshTriangles;
        GraphicsBuffer meshPositions;
        GraphicsBuffer commandBuf;
        GraphicsBuffer.IndirectDrawArgs[] commandData;
        const int commandCount = 2;

        public void OnEnable()
        {
            initialized = true;

            int[] triangles = new int[] { 0, 2, 1 };
            float[] vertices = new float[] { -1, -1, 0, 1, -1, 0, 0, 1, 0 };

            // note: remember to check "Read/Write" on the mesh asset to get access to the geometry data
            meshTriangles = new GraphicsBuffer(GraphicsBuffer.Target.Structured, triangles.Length, sizeof(int));
            meshTriangles.SetData(triangles);
            meshPositions = new GraphicsBuffer(GraphicsBuffer.Target.Structured, vertices.Length / 3, 3 * sizeof(float));
            meshPositions.SetData(vertices);
            commandBuf = new GraphicsBuffer(GraphicsBuffer.Target.IndirectArguments, commandCount, GraphicsBuffer.IndirectDrawArgs.size);
            commandData = new GraphicsBuffer.IndirectDrawArgs[commandCount];

        }

        public void OnDisable()
        {
            if (initialized)
            {
                meshTriangles?.Dispose();
                meshTriangles = null;
                meshPositions?.Dispose();
                meshPositions = null;
                commandBuf?.Dispose();
                commandBuf = null;
            }
        }

        private void Update()
        {
            RenderParams rp = new RenderParams(material);
            rp.worldBounds = new Bounds(Vector3.zero, 10000 * Vector3.one); // use tighter bounds
            rp.matProps = new MaterialPropertyBlock();
            rp.matProps.SetBuffer("_Triangles", meshTriangles);
            rp.matProps.SetBuffer("_Positions", meshPositions);
            rp.matProps.SetInt("_BaseVertexIndex", 0);
            rp.matProps.SetMatrix("_ObjectToWorld", Matrix4x4.Translate(new Vector3(-4.5f, 0, 0)));
            commandData[0].vertexCountPerInstance = 3;
            commandData[0].instanceCount = 10;
            commandData[1].vertexCountPerInstance = 3;
            commandData[1].instanceCount = 10;
            commandBuf.SetData(commandData);
            Graphics.RenderPrimitivesIndirect(rp, MeshTopology.Triangles, commandBuf, commandCount);
        }
    }
}