private List <Polygon> ClipPolygons(IEnumerable <Polygon> polygons)
{
if (Plane == null)
{
return(polygons.ToList());
}
var pp = Plane.ToPrecisionPlane();
var front = new List <Polygon>();
var back = new List <Polygon>();
foreach (var polygon in polygons.Select(x => x.ToPrecisionPolygon()))
{
polygon.Split(pp, out var b, out var f, out var cb, out var cf);
if (f != null)
{
front.Add(f.ToStandardPolygon());
}
if (b != null)
{
back.Add(b.ToStandardPolygon());
}
if (cf != null)
{
front.Add(cf.ToStandardPolygon());
}
if (cb != null)
{
back.Add(cb.ToStandardPolygon());
}
}
if (Front != null)
{
front = Front.ClipPolygons(front);
}
back = Back != null?Back.ClipPolygons(back) : new List <Polygon>();
return(front.Concat(back).ToList());
}
private List <Polygon> ClipPolygons(IEnumerable <Polygon> polygons)
{
if (Plane == null)
{
return(polygons.ToList());
}
var front = new List <Polygon>();
var back = new List <Polygon>();
foreach (var polygon in polygons)
{
Polygon f, b, cf, cb;
polygon.Split(Plane, out b, out f, out cb, out cf);
if (f != null)
{
front.Add(f);
}
if (b != null)
{
back.Add(b);
}
if (cf != null)
{
front.Add(cf);
}
if (cb != null)
{
back.Add(cb);
}
}
if (Front != null)
{
front = Front.ClipPolygons(front);
}
back = Back != null?Back.ClipPolygons(back) : new List <Polygon>();
return(front.Concat(back).ToList());
}
