public void BBoxTest()
{
var l = new Line3D(10, 50, -10, -10, -50, 60);
var bbox = l.BBox(1e-1);
Assert.True(bbox.Min.EqualsTol(1e-1, -10, -50, -10));
Assert.True(bbox.Max.EqualsTol(1e-1, 10, 50, 60));
}