public void CalculateGrazeLineSphereIntersection()
{
// arrange
var sphereCenter = new Point(150, 150);
const double SphereRadius = 5;
var lineStartPoint = new Point(0, 0);
var lineEndPoint = new Point(300, 286.179770816163);
Point?firstIntersection;
Point?secondIntersection;
// act
var intersection = CalculationHelpers.CalculateLineSphereIntersection(
sphereCenter,
SphereRadius,
lineStartPoint,
lineEndPoint,
out firstIntersection,
out secondIntersection);
// assert
Assert.AreEqual(1, intersection);
Assert.IsNotNull(firstIntersection);
Assert.AreEqual(153.45121834340819, firstIntersection.Value.X, 0.00001);
Assert.AreEqual(146.38211498992513, firstIntersection.Value.Y, 0.00001);
Assert.IsNull(secondIntersection);
}
public void CalculateLineSphereIntersectionWithOppositeDirection()
{
// arrange
var sphereCenter = new Point(150, 150);
const double SphereRadius = 5;
var lineStartPoint = new Point(140, 140);
var lineEndPoint = new Point(0, 0);
Point?firstIntersection;
Point?secondIntersection;
// act
var intersection = CalculationHelpers.CalculateLineSphereIntersection(
sphereCenter,
SphereRadius,
lineStartPoint,
lineEndPoint,
out firstIntersection,
out secondIntersection);
// assert
Assert.AreEqual(0, intersection);
Assert.IsNull(firstIntersection);
Assert.IsNull(secondIntersection);
}
public void CalculateRunThroughLineSphereIntersection()
{
// arrange
var sphereCenter = new Point(150, 150);
const double SphereRadius = 5;
var lineStartPoint = new Point(0, 0);
var lineEndPoint = new Point(300, 300);
Point?firstIntersection;
Point?secondIntersection;
// act
var intersection = CalculationHelpers.CalculateLineSphereIntersection(
sphereCenter,
SphereRadius,
lineStartPoint,
lineEndPoint,
out firstIntersection,
out secondIntersection);
// assert
Assert.AreEqual(2, intersection);
Assert.IsNotNull(firstIntersection);
Assert.AreEqual(146.4644660940672624, firstIntersection.Value.X, 0.00001);
Assert.AreEqual(146.4644660940672624, firstIntersection.Value.Y, 0.00001);
Assert.IsNotNull(secondIntersection);
Assert.AreEqual(153.5355339059327376, secondIntersection.Value.X, 0.00001);
Assert.AreEqual(153.5355339059327376, secondIntersection.Value.Y, 0.00001);
}
