Variable Offset on Both Sides

[WileyNg]

@AngusJohnson
I wonder if there's a way in your library to produce different set of variable offsets for left side and right side?

Under this method OffsetOpenPath()

Clipper2/CPP/Clipper2Lib/src/clipper.offset.cpp

Lines 420 to 452 in c535478

	for (Path64::size_type j = 1, k = 0; j < highI; k = j, ++j)
	OffsetPoint(group, path, j, k);
	// reverse normals
	for (size_t i = highI; i > 0; --i)
	norms[i] = PointD(-norms[i - 1].x, -norms[i - 1].y);
	norms[0] = norms[highI];
	// do the line end cap
	if (deltaCallback64_)
	group_delta_ = deltaCallback64_(path, norms, highI, highI);
	if (std::fabs(group_delta_) <= floating_point_tolerance)
	path_out.emplace_back(path[highI]);
	else
	{
	switch (end_type_)
	{
	case EndType::Butt:
	DoBevel(path, highI, highI);
	break;
	case EndType::Round:
	DoRound(path, highI, highI, PI);
	break;
	default:
	DoSquare(path, highI, highI);
	break;
	}
	}
	for (size_t j = highI -1, k = highI; j > 0; k = j, --j)
	OffsetPoint(group, path, j, k);
	solution->emplace_back(path_out);

I am assuming

This is the left side

		for (Path64::size_type j = 1, k = 0; j < highI; k = j, ++j)
			OffsetPoint(group, path, j, k);

And this is the right side

 for (size_t j = highI -1, k = highI; j > 0; k = j, --j) 
 	OffsetPoint(group, path, j, k); 

So basically I just need to run a flag after the these lines, as it indicates a switch in direction.

Clipper2/CPP/Clipper2Lib/src/clipper.offset.cpp

Lines 432 to 448 in c535478

	if (std::fabs(group_delta_) <= floating_point_tolerance)
	path_out.emplace_back(path[highI]);
	else
	{
	switch (end_type_)
	{
	case EndType::Butt:
	DoBevel(path, highI, highI);
	break;
	case EndType::Round:
	DoRound(path, highI, highI, PI);
	break;
	default:
	DoSquare(path, highI, highI);
	break;
	}
	}

And use the flag to adjust the delta accordingly.
Am I right? Is there something I missed?