UnityEngine.Renderer.SetStaticBatchInfo C# (CSharp) Method

        internal extern void SetStaticBatchInfo(int firstSubMesh, int subMeshCount);

        static private void MakeBatch(List <MeshSubsetCombineUtility.MeshContainer> meshes, Transform staticBatchRootTransform, int batchIndex)
        {
            if (meshes.Count < 2)
            {
                return;
            }

            List <MeshSubsetCombineUtility.MeshInstance>    meshInstances       = new List <MeshSubsetCombineUtility.MeshInstance>();
            List <MeshSubsetCombineUtility.SubMeshInstance> allSubMeshInstances = new List <MeshSubsetCombineUtility.SubMeshInstance>();

            foreach (MeshSubsetCombineUtility.MeshContainer mesh in meshes)
            {
                meshInstances.Add(mesh.instance);
                allSubMeshInstances.AddRange(mesh.subMeshInstances);
            }

            string combinedMeshName = CombinedMeshPrefix;

            combinedMeshName += " (root: " + ((staticBatchRootTransform != null) ? staticBatchRootTransform.name : "scene") + ")";
            if (batchIndex > 0)
            {
                combinedMeshName += " " + (batchIndex + 1);
            }

            Mesh combinedMesh = StaticBatchingHelper.InternalCombineVertices(meshInstances.ToArray(), combinedMeshName);

            StaticBatchingHelper.InternalCombineIndices(allSubMeshInstances.ToArray(), combinedMesh);
            int totalSubMeshCount = 0;

            foreach (MeshSubsetCombineUtility.MeshContainer mesh in meshes)
            {
                // Changing the mesh resets the static batch info, so we have to assign sharedMesh first
                MeshFilter filter = (MeshFilter)mesh.gameObject.GetComponent(typeof(MeshFilter));
                filter.sharedMesh = combinedMesh;

                int      subMeshCount = mesh.subMeshInstances.Count();
                Renderer renderer     = mesh.gameObject.GetComponent <Renderer>();
                renderer.SetStaticBatchInfo(totalSubMeshCount, subMeshCount);
                renderer.staticBatchRootTransform = staticBatchRootTransform;

                // For some reason if GOs were created dynamically
                // then we need to toggle renderer to avoid caching old geometry
                renderer.enabled = false;
                renderer.enabled = true;

                // Remove the additionalVertexStreamsMesh, all its data has been copied into the combined mesh.
                MeshRenderer meshRenderer = renderer as MeshRenderer;
                if (meshRenderer != null)
                {
                    meshRenderer.additionalVertexStreams = null;
                }

                totalSubMeshCount += subMeshCount;
            }
        }