public void LeftIntersection_WhenSweeplinePassesThroughLowerOfTheTwoFocii_ShouldReturnDirectionOfThatFocus
(Arc arc, Sweepline sweepline)
{
arc.LeftNeighbour.Position = Utilities.VectorAt(114, 94);
arc.Site.Position = Utilities.VectorAt(96, 77);
sweepline = Utilities.SweeplineAt(121);
// Fixture setup
var focus = arc.Site.Position;
var leftFocus = arc.LeftNeighbour.Position;
var lowerFocus = focus.Z < leftFocus.Z ? focus : leftFocus;
var directionOfLowerFocus = AngleUtilities.EquatorialDirection(lowerFocus);
sweepline.Z = lowerFocus.Z;
// Exercise system
var directionOfLeftIntersection = arc.LeftIntersection(sweepline);
// Verify outcome
var failureString = String.Format("Direction of left intersection: {0},\n",
directionOfLeftIntersection);
Assert.True(Vector.AlmostEqual(directionOfLowerFocus, directionOfLeftIntersection, Tolerance), failureString);
// Teardown
}
public void LeftIntersection_OfLowerFocusWhenSweeplineIsBelowIt_ShouldBeInOrderLeftIntersectionThenSiteThenRightIntersection
(Arc arc, Sweepline sweepline)
{
// Fixture setup
var dualArc = new Arc {
LeftNeighbour = arc.Site, Site = arc.LeftNeighbour
};
var lowerArc = arc.Site.Position.Z < dualArc.Site.Position.Z ? arc : dualArc;
var higherArc = arc.Site.Position.Z >= dualArc.Site.Position.Z ? arc : dualArc;
var directionOfLowerFocus = AngleUtilities.EquatorialDirection(lowerArc.Site.Position);
// Exercise system
var directionOfLeftIntersection = lowerArc.LeftIntersection(sweepline);
var directionOfRightIntersection = higherArc.LeftIntersection(sweepline);
// Verify outcome
var areInOrder = ArcOrderer.AreInOrder(directionOfLeftIntersection, directionOfLowerFocus, directionOfRightIntersection);
var failureString = String.Format("Direction of left intersection: {0},\n" +
"Direction of right intersection: {1},\n",
directionOfLeftIntersection, directionOfRightIntersection);
Assert.True(areInOrder, failureString);
// Teardown
}
public void LeftIntersection_WhenLeftNeigbourIsSameAsArcSite_ShouldReturnDirectionOfFocus
(Arc arc, Sweepline sweepline)
{
// Fixture setup
arc.LeftNeighbour = arc.Site;
var directionOfFocus = AngleUtilities.EquatorialDirection(arc.Site.Position);
// Exercise system
var directionOfLeftIntersection = arc.LeftIntersection(sweepline);
// Verify outcome
var failureString = String.Format("Direction of left intersection: {0},\n",
directionOfLeftIntersection);
Assert.True(Vector.AlmostEqual(directionOfFocus, directionOfLeftIntersection, Tolerance), failureString);
// Teardown
}
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
}
