public void EquatorialMidpoint_OfTwoNonpolarVectors_ShouldBeInOrderWithTheTwoVectorsEquatorialDirections
(Vector3 u, Vector3 v)
{
// Fixture setup
var directionOfU = AngleUtilities.EquatorialDirection(u);
var directionOfV = AngleUtilities.EquatorialDirection(v);
// Exercise system
var midpoint = AngleUtilities.EquatorialMidpoint(u, v);
// Verify outcome
var areInOrder = ArcOrderer.AreInOrder(directionOfU, midpoint, directionOfV);
var failureString = String.Format("Midpoint was {0}", midpoint);
Assert.True(areInOrder, failureString);
// Teardown
}
public void EquatorialMidpoint_OfTwoNonpolarVectors_ShouldBeEquidistantFromThoseVectorsEquatorialDirections
(Vector3 u, Vector3 v)
{
// Fixture setup
var directionOfU = AngleUtilities.EquatorialDirection(u);
var directionOfV = AngleUtilities.EquatorialDirection(v);
// Exercise system
var midpoint = AngleUtilities.EquatorialMidpoint(u, v);
// Verify outcome
var distanceToU = Trig.InverseCosine(directionOfU.ScalarMultiply(midpoint));
var distanceToV = Trig.InverseCosine(directionOfV.ScalarMultiply(midpoint));
Debug.WriteLine(distanceToU + "," + distanceToV);
var failureString = String.Format("Midpoint was {0}", midpoint);
Assert.True(Number.AlmostEqual(distanceToU, distanceToV, Tolerance), failureString);
// Teardown
}
public void LeftIntersection_WhenSweeplinePassesThroughBothFocuses_ShouldReturnEquatorialMidpointOfFocii
(Arc arc, Sweepline sweepline)
{
// Fixture setup
var colatitudeOfFocus = arc.Site.Position.SphericalCoordinates().Colatitude;
var azimuthOfFocus = arc.Site.Position.SphericalCoordinates().Azimuth;
var azimuthOfLeftFocus = arc.LeftNeighbour.Position.SphericalCoordinates().Azimuth;
arc.Site.Position = new SphericalCoords(colatitudeOfFocus, azimuthOfFocus).CartesianCoordinates();
arc.LeftNeighbour.Position = new SphericalCoords(colatitudeOfFocus, azimuthOfLeftFocus).CartesianCoordinates();
// Exercise system
var directionOfLeftIntersection = arc.LeftIntersection(sweepline);
// Verify outcome
var equatorialMidpoint = AngleUtilities.EquatorialMidpoint(arc.LeftNeighbour.Position, arc.Site.Position);
var failureString = String.Format("Direction of left intersection: {0},\n",
directionOfLeftIntersection);
Assert.True(Vector.AlmostEqual(equatorialMidpoint, directionOfLeftIntersection, Tolerance), failureString);
// Teardown
}