internal double Area()
{
// TODO is this calculation the same as something else, like the normal?
xyz v1 = b - a;
xyz v2 = c - a;
xyz cr = xyz.cross(v1, v2);
double mag = cr.magnitude();
return(mag / 2);
}
public void test_measure()
{
Solid s = wood.CreateBoard(BoardMaterial.Find(BoardMaterial.SOLID_OAK_RED), "a", 10, 24, 1);
Face f = s.FindFace("top");
HalfEdge he = f.FindLongestEdge();
Assert.IsTrue(fp.eq_inches(24, he.Length()));
xyz p1 = he.Center();
xyz p2 = f.Measure(he, p1);
xyz q = p2 - p1;
Assert.IsTrue(fp.eq_inches(10, q.magnitude()));
CompoundSolid cs = wood.Mortise(s.ToCompoundSolid(), he, new xy(3, 3), new xyz(18, 4, 2), "m1");
f = cs.FindFace("a.top");
Assert.AreEqual(2, f.loops.Count);
he = f.FindLongestEdge();
Assert.IsTrue(fp.eq_inches(24, he.Length()));
p1 = he.Center();
p2 = f.Measure(he, p1);
q = p2 - p1;
Assert.IsTrue(fp.eq_inches(3, q.magnitude()));
}