// Convert solid space to empty space and empty space to solid space.
void invert()
{
for (int i = 0; i < polygons.Count; i++)
{
polygons[i].flip();
}
plane.flip();
if (front != null)
{
front.invert();
}
if (back != null)
{
back.invert();
}
//std::swap(front, back);
//hmm - need to swap front and back...
csgjs_csgnode f = null;
csgjs_csgnode b = null;
if (front != null)
{
f = front.clone();
}
if (back != null)
{
b = back.clone();
}
back = f;
front = b;
}
// Return a new CSG solid representing space in either this solid or in the
// solid `csg`. Neither this solid nor the solid `csg` are modified.
public static csgjs_csgnode csg_union(csgjs_csgnode a1, csgjs_csgnode b1)
{
csgjs_csgnode a = a1.clone();
csgjs_csgnode b = b1.clone();
a.clipTo(b);
b.clipTo(a);
b.invert();
b.clipTo(a);
b.invert();
a.build(b.allPolygons());
csgjs_csgnode ret = new csgjs_csgnode(a.allPolygons());
a = null;
b = null;
return(ret);
}
