public async Task GetTrimCurves2ForAHalfDiscShouldReturnTwoNonPeriodicOpenTrimCurve() { await CreatePartDoc(async (modelDoc, yielder) => { var disc0 = Modeler.CreateSemiCirclularSheet (center: Vector3.Zero , vNormal: Vector3.UnitZ , vRef: Vector3.UnitX , radius: 2 ); // Display the original sheet. Visually verify it is ok. // Press "Continue Test Execution" button within solidworks // to continue the test after visual inspection of the sheet using (disc0.DisplayUndoable(modelDoc)) await PauseTestExecution(pause: false); // The sheet should only have one face. Extract it var faces = disc0.GetFaces().CastArray <IFace2>(); faces.Length.Should().Be(1); var face = faces[0]; // Convert the solidworks face to a bspline face var bsplineFace = BSplineFace.Create(face); bsplineFace.TrimLoops.Count.Should().Be(1); var trimLoop = bsplineFace.TrimLoops[0]; trimLoop.Count.Should().Be(2); { // The curve is a clamped open curve. ( A half circle ) It is not "Solidworks periodic" trimLoop[0].Order.Should().Be(3); trimLoop[0].KnotVectorU.Take(3).ShouldBeEquivalentTo(new[] { 0, 0, 0 }); trimLoop[0].KnotVectorU.TakeLast(3).ShouldBeEquivalentTo(new[] { 1, 1, 1 }); var controlPoints00 = trimLoop[0].ControlPoints; controlPoints00.First() .Should().NotBe(controlPoints00.Last()); // This is not solidworks periodic so this property should be false trimLoop[0].IsClosed.Should().BeFalse(); } { // The curve is a clamped closed curve. ( A line ) It is not "Solidworks periodic" trimLoop[1].Order.Should().Be(2); trimLoop[1].KnotVectorU.Take(2).ShouldBeEquivalentTo(new[] { 0, 0 }); trimLoop[1].KnotVectorU.TakeLast(2).ShouldBeEquivalentTo(new[] { 1, 1 }); var controlPoints00 = trimLoop[0].ControlPoints; controlPoints00.First() .Should().NotBe(controlPoints00.Last()); // This is not solidworks periodic so this property should be false trimLoop[1].IsClosed.Should().BeFalse(); } }); }