def test_sphere_miss(self):
r = ray(point(0, 2, -5), vector(0, 0, 1))
s = sphere()
xs = intersect(s, r)
self.assertEqual(len(xs), 0, 'There should be no intersections ')
def test_position(self):
r = ray(point(2, 3, 4), vector(1, 0, 0))
self.assertEqual(position(r, 0), point(2, 3, 4), 'Ray position failed')
self.assertEqual(position(r, 1), point(3, 3, 4), 'Ray position failed')
self.assertEqual(position(r, -1), point(1, 3, 4),
'Ray position failed')
self.assertEqual(position(r, 2.5), point(4.5, 3, 4),
'Ray position failed')
def test_ray(self):
origin = point(1, 2, 3)
direction = vector(4, 5, 6)
r = ray(origin, direction)
self.assertEqual(r.origin, origin, 'The origin of ray failed')
self.assertEqual(r.direction, direction, 'The direction of ray failed')
def test_sphere_transformed2(self):
r = ray(point(0, 0, -5), vector(0, 0, 1))
s = sphere()
s.set_transform(translation(5, 0, 0))
xs = intersect(s, r)
self.assertEqual(len(xs), 0, 'There sould be no intersection')
def test_sphere_intersect_group(self):
r = ray(point(0, 0, -5), vector(0, 0, 1))
s = sphere()
xs = intersect(s, r)
self.assertEqual(len(xs), 2, 'There should be 2 intersections')
self.assertEqual(xs[0].object, s, 'The intersection object failed')
self.assertEqual(xs[1].object, s, 'The intersection object failed')
def test_sphere(self):
r = ray(point(0, 0, -5), vector(0, 0, 1))
s = sphere()
xs = intersect(s, r)
self.assertEqual(len(xs), 2, 'There should be 2 intersections')
self.assertEqual(xs[0].t, 4.0, 't=4 should intersect')
self.assertEqual(xs[1].t, 6.0, 't=6 should intersect')
def test_sphere_behind(self):
r = ray(point(0, 0, 5), vector(0, 0, 1))
s = sphere()
xs = intersect(s, r)
self.assertEqual(len(xs), 2,
'There should be 2 intersections (virtual)')
self.assertEqual(xs[0].t, -6.0, 't=-6 should be an intersection time')
self.assertEqual(xs[1].t, -4.0, 't=-4 should be an intersection time')
def test_sphere_inner(self):
r = ray(point(0, 0, 0), vector(0, 0, 1))
s = sphere()
xs = intersect(s, r)
self.assertEqual(len(xs), 2,
'There should be 2 intersections (virtual)')
self.assertEqual(xs[0].t, -1.0, 't=-1 should be an intersection time')
self.assertEqual(xs[1].t, 1.0, 't=1 should be an intersection time')
def test_sphere_transformed(self):
r = ray(point(0, 0, -5), vector(0, 0, 1))
s = sphere()
s.set_transform(scaling(2, 2, 2))
xs = intersect(s, r)
self.assertEqual(len(xs), 2, 'There should have been 2 intersections')
self.assertEqual(xs[0].t, 3, 't=3 should have been present')
self.assertEqual(xs[1].t, 7, 't=4 should have been present')
def test_transformation(self):
r = ray(point(1, 2, 3), vector(0, 1, 0))
m = translation(3, 4, 5)
r2 = transform(r, m)
self.assertEqual(r2.origin, point(4, 6, 8),
'The ray translation failed')
self.assertEqual(r2.direction, vector(0, 1, 0),
'The ray translation failed')
m2 = scaling(2, 3, 4)
r3 = transform(r, m2)
self.assertEqual(r3.origin, point(2, 6, 12), 'The ray scaling failed')
self.assertEqual(r3.direction, vector(0, 3, 0),
'The ray scaling failed')
light_color = color(1, 1, 1)
light = PointLight(light_position, light_color)
s = sphere()
s.material = Material()
s.material.color = color(1, 0.2, 1)
trans = scaling(200, 200, 1) * translation(0, 0, 800)
s.set_transform(trans)
print('{:04d},{:04d}'.format(0, 0), end='\r')
h = False
for i in range(CANVAS_W):
#print()
for j in range(CANVAS_H):
print('{:04d},{:04d}'.format(i, j), end='\r')
r = ray(point(0, 0, 0), vector(i + pad_x, -pad_y - j, CANVAS_DISTANCE))
inter = intersect(s, r)
if hit(inter) != None:
c[i, j] = HIT_COLOR
h = True
#if h:
#print('\033[48;2;255;0;0m \033[0m', end='', flush=True)
#else:
#print('\033[48;2;230;230;230m \033[0m', end='', flush=True)
h = False
PPM = c.to_PPM()
with open('shadow_sphere.ppm', 'w') as f:
f.write(PPM)
