Method testSplineApprox

tests/test_cadquery.py:5174–5238

(self)

            f = Face.makeFromWires(w0, [w1])

    def testSplineApprox(self):

        from .naca import naca5305
        from math import pi, cos

        pts = [Vector(e[0], e[1], 0) for e in naca5305]

        # spline

        e1 = Edge.makeSplineApprox(pts, 1e-6, maxDeg=6, smoothing=(1, 1, 1))
        e2 = Edge.makeSplineApprox(pts, 1e-6, minDeg=2, maxDeg=6)

        self.assertTrue(e1.isValid())
        self.assertTrue(e2.isValid())
        self.assertTrue(e1.Length() > e2.Length())

        with raises(ValueError):
            e4 = Edge.makeSplineApprox(pts, 1e-6, maxDeg=3, smoothing=(1, 1, 1.0))

        pts_closed = pts + [pts[0]]

        e3 = Edge.makeSplineApprox(pts_closed)
        w = Edge.makeSplineApprox(pts).close()

        self.assertTrue(e3.IsClosed())
        self.assertTrue(w.IsClosed())

        # Workplane method

        w1 = Workplane().splineApprox(pts)
        w2 = Workplane().splineApprox(pts, forConstruction=True)
        w3 = Workplane().splineApprox(pts, makeWire=True)
        w4 = Workplane().splineApprox(pts, makeWire=True, forConstruction=True)

        self.assertEqual(w1.edges().size(), 1)
        self.assertEqual(len(w1.ctx.pendingEdges), 1)
        self.assertEqual(w2.edges().size(), 1)
        self.assertEqual(len(w2.ctx.pendingEdges), 0)
        self.assertEqual(w3.wires().size(), 1)
        self.assertEqual(len(w3.ctx.pendingWires), 1)
        self.assertEqual(w4.wires().size(), 1)
        self.assertEqual(len(w4.ctx.pendingWires), 0)

        # spline surface

        N = 40
        T = 20
        A = 5

        pts = [
            [
                Vector(i, j, A * cos(2 * pi * i / T) * cos(2 * pi * j / T))
                for i in range(N + 1)
            ]
            for j in range(N + 1)
        ]

        f1 = Face.makeSplineApprox(pts, smoothing=(1, 1, 1), maxDeg=6)