public void GetHit_WithPositiveAndNegativeDistances_ExpectCorrectIntersection_0()
{
//arrange
var sphere = new Sphere();
var ray = new Ray(new Point3D(0, 0, 1), new Vector3D(0, 0, 1));
var intersection1 = new Intersection(-1, sphere, ray);
var intersection2 = new Intersection(1, sphere, ray);
var intersections = new Intersections(
new List <Intersection>()
{
intersection1,
intersection2
});
//act
var hit = intersections.GetNearestHit();
//assert
Assert.AreEqual(intersection2, hit);
}
public void GetHit_WithNegativeDistances_ExpectNull()
{
//arrange
var sphere = new Sphere();
var ray = new Ray(new Point3D(0, 0, 1), new Vector3D(0, 0, 1));
var intersection1 = new Intersection(-2, sphere, ray);
var intersection2 = new Intersection(-1, sphere, ray);
var intersections = new Intersections(
new List <Intersection>()
{
intersection1,
intersection2
});
//act
var hit = intersections.GetNearestHit();
//assert
Assert.AreEqual(Option <Intersection> .None, hit);
}