public CsgNode Clone()
{
var node = new CsgNode();
node.Plane = Plane?.Clone();
node.Front = Front?.Clone();
node.Back = Back?.Clone();
node.Polygons = Polygons.Select(p => p.Clone()).ToList();
return(node);
}
public CsgPolygon(List <CsgVertex> vertices, CsgSurfaceSharedData shared = null, CsgPlane plane = null)
{
Vertices = vertices;
Shared = shared;
Plane = plane?.Clone() ?? CsgPlane.FromPoints(vertices);
}