public void GetElements(out ElementTypes[] elementTypes, out long[][] elementTags, out long[][] nodeTags, int dim = -1, int tag = -1)
{
IntPtr api_elementTypesPtr = IntPtr.Zero;
IntPtr api_elementTagsPtr = IntPtr.Zero;
IntPtr api_elementTags_nPtr = IntPtr.Zero;
IntPtr api_nodeTags_Ptr = IntPtr.Zero;
IntPtr api_nodeTags_nPtr = IntPtr.Zero;
ulong api_api_elementTypes_n = 0;
ulong api_elementTags_nn = 0;
ulong api_nodeTags_nn = 0;
GMshNativeMethods.gmshModelMeshGetElements(ref api_elementTypesPtr, ref api_api_elementTypes_n, ref api_elementTagsPtr, ref api_elementTags_nPtr, ref api_elementTags_nn, ref api_nodeTags_Ptr, ref api_nodeTags_nPtr, ref api_nodeTags_nn, dim, tag, ref ierr);
if (ierr != 0)
{
throw new GMshException(ierr);
}
int[] elementTypesInt = new int[api_api_elementTypes_n];
if (api_api_elementTypes_n != 0)
{
Marshal.Copy(api_elementTypesPtr, elementTypesInt, 0, api_api_elementTypes_n.Toint());
}
elementTypes = elementTypesInt.Select(e => (ElementTypes)e).ToArray();
api_elementTypesPtr.GmshFree();
long[] api_elementTags_n = new long[api_elementTags_nn];
elementTags = new long[api_elementTags_nn][];
if (api_elementTags_nn != 0)
{
var n = api_elementTags_nn.Toint();
Marshal.Copy(api_elementTags_nPtr, api_elementTags_n, 0, n);
IntPtr[] ptrs = new IntPtr[api_elementTags_nn];
Marshal.Copy(api_elementTagsPtr, ptrs, 0, n);
for (int i = 0; i < ptrs.Length; i++)
{
long[] ss = new long[api_elementTags_n[i]];
Marshal.Copy(ptrs[i], ss, 0, api_elementTags_n[i].Toint());
elementTags[i] = ss;
ptrs[i].GmshFree();
}
}
api_elementTagsPtr.GmshFree();
api_elementTags_nPtr.GmshFree();
long[] api_nodeTags_n = new long[api_nodeTags_nn];
nodeTags = new long[api_nodeTags_nn][];
if (api_nodeTags_nn != 0)
{
var n = api_nodeTags_nn.Toint();
Marshal.Copy(api_nodeTags_nPtr, api_nodeTags_n, 0, n);
IntPtr[] ptrs = new IntPtr[api_nodeTags_nn];
Marshal.Copy(api_nodeTags_Ptr, ptrs, 0, n);
for (int i = 0; i < ptrs.Length; i++)
{
long[] ss = new long[api_nodeTags_n[i]];
Marshal.Copy(ptrs[i], ss, 0, api_nodeTags_n[i].Toint());
nodeTags[i] = ss;
ptrs[i].GmshFree();
}
}
api_nodeTags_Ptr.GmshFree();
api_nodeTags_nPtr.GmshFree();
}
