Method mapPolarInRadiansToCartesian

tests/backend/Datapicker/DatapickerTest.cpp:293–332

}

void DatapickerTest::mapPolarInRadiansToCartesian() {
	DatapickerImage::ReferencePoints points;
	points.type = DatapickerImage::GraphType::PolarInRadians;
	points.logicalPos[0].setX(1);
	points.logicalPos[0].setY(0);
	points.logicalPos[1].setX(3);
	points.logicalPos[1].setY(2.1f);
	points.logicalPos[2].setX(5);
	points.logicalPos[2].setY(3.8f);
	points.scenePos[0].setX(6.21);
	points.scenePos[0].setY(7.23);
	points.scenePos[1].setX(-51.2);
	points.scenePos[1].setY(3234);
	points.scenePos[2].setX(-23);
	points.scenePos[2].setY(+5e6);

	Transform t;
	QCOMPARE(t.mapTypeToCartesian(points), true);
	VALUES_EQUAL(t.x[0], 1.);
	VALUES_EQUAL(t.y[0], 0.);

	// TODO: VALUES_EQUAL doesn't work for the next comparions since the precision 1.e-7 is too high for the numerical error involved here.
	// to improve the precision we need to get rid of QVector3D using floats internally and to switch to doubles. For now, just use a somewhat
	// lower precision here since it's not essential.
	// VALUES_EQUAL(t.x[1], -1.5145383137996); // precision seems to be not correct. Referece value is correct
	double v1 = t.x[1];
	double ref = -1.5145383137996;
	QVERIFY2(nsl_math_approximately_equal_eps(v1, ref, 1.e-5) == true,
			 qPrintable(QStringLiteral("v1:%1, ref:%2").arg(v1, 0, 'g', 15, QLatin1Char(' ')).arg(ref, 0, 'g', 15, QLatin1Char(' '))));

	VALUES_EQUAL(t.y[1], 2.5896280999466);
	VALUES_EQUAL(t.x[2], -3.9548385595721);
	VALUES_EQUAL(t.y[2], -3.0592894547136);
	VALUES_EQUAL(t.X[0], 6.21);
	VALUES_EQUAL(t.Y[0], 7.23);
	VALUES_EQUAL(t.X[1], -51.2);
	VALUES_EQUAL(t.Y[1], 3234.);
	VALUES_EQUAL(t.X[2], -23.);
	VALUES_EQUAL(t.Y[2], +5.e6);
}

void DatapickerTest::mapPolarInDegreeToCartesian() {
	DatapickerImage::ReferencePoints points;