public Csgjs Union(Csgjs csg)
{
if (Polygons.Count == 0)
{
return(csg.Clone());
}
if (csg.Polygons.Count == 0)
{
return(Clone());
}
var a = new CsgNode(Clone().Polygons);
var b = new CsgNode(csg.Clone().Polygons);
a.ClipTo(b);
b.ClipTo(a);
b.Invert();
b.ClipTo(a);
b.Invert();
a.Build(b.AllPolygons());
return(FromPolygons(a.AllPolygons()));
}
public void Build(List <CsgPolygon> polygons)
{
if (polygons.Count == 0)
{
return;
}
if (Plane == null)
{
// Don't randomly choose a split plane. Coherent results are important.
Plane = polygons[polygons.Count / 2].Plane.Clone();
}
var frontPolygons = new List <CsgPolygon>();
var backPolygons = new List <CsgPolygon>();
for (int i = 0; i < polygons.Count; i++)
{
Plane.SplitPolygon(polygons[i], Polygons, Polygons, frontPolygons, backPolygons);
}
if (frontPolygons.Count > 0)
{
if (Front == null)
{
Front = new CsgNode();
}
Front.Build(frontPolygons);
}
if (backPolygons.Count > 0)
{
if (Back == null)
{
Back = new CsgNode();
}
Back.Build(backPolygons);
}
}
