Function TEST

tests/T_Circles.cpp:10–87

using namespace LNLib;

TEST(Test_Circles, All)
{
	{
		XYZ sp1 = XYZ(5.0, 181.34, 0);
		XYZ ep1 = XYZ(13.659999999999997, 176.34, 0);

		XYZ sp2 = XYZ(19.999779996773235, 189.9998729810778, 0);
		XYZ ep2 = XYZ(19.999652977851035, 180.00009298430456, 0);

		double param1, param2 = 0.0;
		XYZ interP;
		CurveCurveIntersectionType type = Intersection::ComputeRays(sp1, ep1 - sp1, sp2, ep2 - sp2, param1, param2, interP);
		EXPECT_TRUE(type != CurveCurveIntersectionType::Skew);
	}

	{
		XYZ center = XYZ(0, 0, 0);
		XYZ xAxis = XYZ(1, 0, 0);
		XYZ yAxis = XYZ(0, 1, 0);
		
		LN_NurbsCurve curve;
		
		bool result = NurbsCurve::CreateArc(center, xAxis, yAxis, 0, 2 * Constants::Pi, 10, 10, curve);
		EXPECT_TRUE(result);

		XYZ C0 = NurbsCurve::GetPointOnCurve(curve, 0);
		EXPECT_TRUE(C0.IsAlmostEqualTo(XYZ(10, 0, 0)));
		XYZ C1 = NurbsCurve::GetPointOnCurve(curve,0.25);
		EXPECT_TRUE(C1.IsAlmostEqualTo(XYZ(0, 10, 0)));
		XYZ C2 = NurbsCurve::GetPointOnCurve(curve, 0.5);
		EXPECT_TRUE(C2.IsAlmostEqualTo(XYZ(-10, 0, 0)));
		XYZ C3 = NurbsCurve::GetPointOnCurve(curve, 0.75);
		EXPECT_TRUE(C3.IsAlmostEqualTo(XYZ(0, -10, 0)));
		XYZ C4 = NurbsCurve::GetPointOnCurve(curve, 1.0);
		EXPECT_TRUE(C4.IsAlmostEqualTo(XYZ(10, 0, 0)));

		// Test arcs of 1/2/3/4 portions.
		double endAngle[] = {Constants::Pi/4, 3*Constants::Pi/4, 5*Constants::Pi/4, 7*Constants::Pi/4};
		for(int i=0;i<4;++i)
		{
			// Create arc.
			const double radius = 10;
			const double startAngle = 0;
			bool result = NurbsCurve::CreateArc(center, xAxis, yAxis, 
				startAngle, endAngle[i], radius, radius, curve);
			
			LN_ArcInfo arcInfo;
			bool isArc = NurbsCurve::IsArc(curve, arcInfo);
			EXPECT_TRUE(isArc);
			EXPECT_TRUE(MathUtils::IsAlmostEqualTo(radius, arcInfo.Radius));
			EXPECT_TRUE(result);

			// Verify length.
			double length = NurbsCurve::ApproximateLength(curve, LNLib::IntegratorType::Chebyshev);
			double expectedLen = (endAngle[i] - startAngle) * radius;
			EXPECT_NEAR(length, expectedLen, Constants::DistanceEpsilon);
		}
	}