public void Intersects_Ray3_Misses()
{
var b = new BoundingBox(new Vector3(3, 4, 5), new Vector3(6, 7, 8));
var r = new Ray3(new Vector3(0, 0, 0), new Vector3(1, 0, 0));
Assert.IsNull(b.Intersects(r));
Assert.AreEqual(r.Intersects(b), b.Intersects(r));
}
public void AssertThat_RayPointingAwayDoesNotIntersect_WithPositivePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), 5);
Ray3 r = new Ray3(new Vector3(0, 10, 0), new Vector3(0, 1, 0));
var i = r.Intersects(p);
Assert.IsNull(i);
}
public void AssertThat_ParallelRayDoesNotIntersect_WithNegativePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), -5);
Ray3 r = new Ray3(new Vector3(0, 10, 0), new Vector3(1, 0, 0));
var i = r.Intersects(p);
Assert.IsNull(i);
}
public void AssertThat_DownwardRayIntersectsPlane_ReturnsCorrectValue_WithNegativePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), -5);
Ray3 r = new Ray3(new Vector3(0, 10, 0), new Vector3(0, -1, 0));
var i = r.Intersects(p);
Assert.AreEqual(5, i);
}
public void AssertThat_DownwardRayIntersectsPlane_ReturnsCorrectValue()
{
Plane p = new Plane(new Vector3(0, 1, 0), 0);
Ray3 r = new Ray3(new Vector3(0, 10, 0), new Vector3(0, -1, 0));
var i = r.Intersects(p);
Assert.AreEqual(10, i);
}
public void AssertThat_RayAlmostStartingOnPlane_Intersects_WithNegativePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), -5);
Ray3 r = new Ray3(new Vector3(0, 4.999999f, 0), new Vector3(0, -1, 0));
var i = r.Intersects(p);
Assert.AreEqual(0, i);
}
public void AssertThat_RayStartingOnPlane_Intersects_WithPositivePlaneDistance()
{
Plane p = new Plane(new Vector3(0, 1, 0), 5);
Ray3 r = new Ray3(new Vector3(0, -5, 0), new Vector3(0, -1, 0));
var i = r.Intersects(p);
Assert.AreEqual(0, i);
}
