/// <summary>
/// Get the boundary of the model entities `dimTags'. Return in `outDimTags' the
/// boundary of the individual entities (if `combined' is false) or the boundary
/// of the combined geometrical shape formed by all input entities (if
/// `combined' is true). Return tags multiplied by the sign of the boundary
/// entity if `oriented' is true. Apply the boundary operator recursively down
/// to dimension 0 (i.e. to points) if `recursive' is true.
/// </summary>
public static ValueTuple <int, int>[] GetBoundary(ValueTuple <int, int>[] dimTags, bool combined = true, bool oriented = true, bool recursive = false)
{
unsafe
{
int *outDimTagsptr;
long outdimTags_n = 0;
var dimarray = dimTags.ToIntArray();
Gmsh_Warp.GmshModelGetBoundary(dimarray, dimarray.LongLength, &outDimTagsptr, ref outdimTags_n, Convert.ToInt32(combined), Convert.ToInt32(oriented), Convert.ToInt32(recursive), ref Gmsh._staticreff);
var array = UnsafeHelp.ToIntArray(outDimTagsptr, outdimTags_n);
var outDimTags = array.ToIntPair();
Gmsh.CheckException(MethodBase.GetCurrentMethod().MethodHandle);
return(outDimTags);
}
}