public xy copy()
{
xy p = new xy(x, y);
// TODO is the following correct?
if (orig != null)
{
p.orig = orig.copy();
}
return(p);
}
internal Triangle3d(xyz _a, xyz _b, xyz _c)
{
#if true // we need this so triangles can share xyz instances so we can share them in wpf so wpf can shade them properly
a = _a;
b = _b;
c = _c;
#else
a = _a.copy();
b = _b.copy();
c = _c.copy();
#endif
n = xyz.normal(a, b, c).normalize_in_place();
iv = (b - a).normalize_in_place();
jv = xyz.cross(n, iv).normalize_in_place();
Debug.Assert(!ut.PointsAreCollinear3d(a, b, c));
#if not
if (ut.PointsAreCollinear3d(a, b, c))
{
throw new GeomCheckException("Attempt to create triangle with 3 collinear points.");
}
#endif
}
public Line3d(xyz a1, xyz a2)
{
p1 = a1.copy();
p2 = a2.copy();
}
