public void CanCalculateNormalToPlane()
{
// Arrange
var plane = new Plane() { Point = new Vector(0, 0, 0), Norm = new Vector(0, 1, 0) };
// Act
var normal = plane.Normal(new Vector(0, 2,2));
// Assert
Assert.IsTrue(normal.Equals(new Vector(0, 1, 0)));
}
public void CanFailToIntersectWhenRayParallelToPlane()
{
// Arrange
var plane = new Plane() { Point = new Vector(0, 0, 0), Norm = new Vector(0, 1, 0) };
var ray = new Ray() { Start = new Vector(0, 1, 0), Direction = new Vector(1, 0, 0) };
// Act
var isect = plane.Intersect(ray);
// Assert
Assert.IsNull(isect);
}
public void CanInsersectPlane()
{
// Arrange
var plane = new Plane() { Point = new Vector(0, 0, 0), Norm = new Vector(0, 1, 0) };
var ray = new Ray() { Start = new Vector(0, 1, 0), Direction = new Vector(0, -1, 0) };
// Act
var isect = plane.Intersect(ray);
// Assert
Assert.NotNull(isect);
Assert.AreEqual(1, isect.Distance);
Assert.AreEqual(plane, isect.Element);
}