Geometry_Engine: BooleanDifference(List<Line>, List<Line>) and BooleanIntersection(List<Line>, List<Line>) modify input collections

[pawelbaran]

Description:

As in the title, happens due to refLines being processed instead of refLeft:

BHoM_Engine/Geometry_Engine/Compute/BooleanIntersection.cs

Lines 111 to 121 in 5bcc6bb

	foreach (var cluster in lines.ClusterCollinear(tolerance))
	{
	List<Line> toIntersect = new List<Line>();
	for (int i = refLines.Count - 1; i >= 0; i--)
	{
	if (refLines[i].IsCollinear(cluster[0]))
	{
	toIntersect.Add(refLines[i]);
	refLines.RemoveAt(i);
	}
	}

BHoM_Engine/Geometry_Engine/Compute/BooleanDifference.cs

Lines 66 to 74 in 5bcc6bb

	List<Line> toCull = new List<Line>();
	for (int i = refLines.Count - 1; i >= 0; i--)
	{
	if (refLines[i].IsCollinear(cluster[0]))
	{
	toCull.Add(refLines[i]);
	refLines.RemoveAt(i);
	}
	}