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 AreInOrder_OnThreeCyclicallyOrderedEquatorialVectors_ShouldReturnTrue()
{
// Fixture setup
var a = Utilities.VectorAt(90, -90);
var b = Utilities.VectorAt(90, 0);
var c = Utilities.VectorAt(90, 90);
// Exercise system
var areInOrder = ArcOrderer.AreInOrder(a, b, c);
// Verify outcome
Assert.True(areInOrder);
// Teardown
}
public void AreInOrder_WhenFirstAndLastVectorsAreEqual_ShouldReturnFalse()
{
// Fixture setup
var a = Utilities.VectorAt(90, -90);
var b = Utilities.VectorAt(90, 0);
var c = Utilities.VectorAt(90, -90);
// Exercise system
var areInOrder = ArcOrderer.AreInOrder(a, b, c);
// Verify outcome
Assert.False(areInOrder);
// 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
}
