def test_ray_when_camera_is_transformed(self):
transform = RotationY(math.pi / 4) * Translation(0, -2, 5)
c = Camera(201, 101, math.pi / 2, transform)
r = c.ray_for_pixel(100, 50)
self.assertEqual(r.origin, Point(0, 2, -5))
self.assertEqual(r.direction,
Vector(math.sqrt(2) / 2, 0, -math.sqrt(2) / 2))
def test_camera_transform_ray():
c = Camera(201, 101, math.pi / 2)
c.transform = RotationY(math.pi / 4) * Translation(0, -2, 5)
r = c.ray_for_pixel(100, 50)
assert r.origin == Point(0, 2, -5)
print(r.direction)
assert r.direction == Vector(math.sqrt(2) / 2, 0, -math.sqrt(2) / 2)
def test_construct_ray_when_camera_is_transformed(self):
c = Camera(201, 101, pi / 2)
c.transformation = rotation_y(pi / 4) * translation(0, -2, 5)
r = c.ray_for_pixel(100, 50)
assert r.origin == Point(0, 2, -5)
assert r.direction == Vector(sqrt(2) / 2, 0, -sqrt(2) / 2)
def test_construct_ray_through_corner_of_canvas(self):
c = Camera(201, 101, pi / 2)
r = c.ray_for_pixel(0, 0)
assert r.origin == Point(0, 0, 0)
assert r.direction == Vector(0.66519, 0.33259, -0.66851)
def test_construct_ray_through_center_of_canvas(self):
c = Camera(201, 101, pi / 2)
r = c.ray_for_pixel(100, 50)
assert r.origin == Point(0, 0, 0)
assert r.direction == Vector(0, 0, -1)
def test_ray_through_corner_of_canvas(self):
c = Camera(201, 101, math.pi / 2)
r = c.ray_for_pixel(0, 0)
self.assertEqual(r.origin, Point(0, 0, 0))
self.assertEqual(r.direction, Vector(0.66519, 0.33259, -0.66851))
def test_ray_through_center_of_canvas(self):
c = Camera(201, 101, math.pi / 2)
r = c.ray_for_pixel(100, 50)
self.assertEqual(r.origin, Point(0, 0, 0))
self.assertEqual(r.direction, Vector(0, 0, -1))
def test_corner_canvas_ray():
c = Camera(201, 101, math.pi / 2)
r = c.ray_for_pixel(0, 0)
assert r.origin == Point(0, 0, 0)
assert r.direction == Vector(0.66519, 0.33259, -0.66851)
def test_center_canvas_ray():
c = Camera(201, 101, math.pi / 2)
r = c.ray_for_pixel(100, 50)
assert r.origin == Point(0, 0, 0)
assert r.direction == Vector(0, 0, -1)
