//----------------------------------------------------------------------------------
protected void ProcessFace(Face face)
{
if (face.Points.Count < 3)
{
return;
}
Exocortex.Geometry3D.Sign sign = _plane.GetSign(face);
//Debug.WriteLine( "plane.GetSign( face ) = " + sign.ToString() );
switch (sign)
{
case Exocortex.Geometry3D.Sign.Negative:
RecordNegativeFace(face);
break;
case Exocortex.Geometry3D.Sign.Zero:
if (Vector3D.Dot(_plane.Normal, face.GetNormal()) > 0)
{
RecordCoplanarFace(face);
}
else
{
RecordNegativeFace(face);
}
break;
case Exocortex.Geometry3D.Sign.Positive:
RecordPositiveFace(face);
break;
case Exocortex.Geometry3D.Sign.Mixed:
RecordCutFace(face);
Face faceA = (Face)face.Clone();
_plane.ClipPolygon(faceA);
if (_plane.GetSign(faceA) != Exocortex.Geometry3D.Sign.Mixed)
{
ProcessFace(faceA);
}
Face faceB = (Face)face.Clone();
_plane.GetFlipped().ClipPolygon(faceB);
if (_plane.GetSign(faceB) != Exocortex.Geometry3D.Sign.Mixed)
{
ProcessFace(faceB);
}
break;
default:
Debug.Assert(false);
break;
}
}