def test_render_world_with_camera(self, default_world): w = default_world c = Camera(11, 11, pi / 2) _from = Point(0, 0, -5) to = Point(0, 0, 0) up = Vector(0, 2, 0) c.transformation = view_transform(_from, to, up) image = c.render(w) assert image.pixel_at(5, 5) == Color(0.38066, 0.47583, 0.2855)
def test_arbitrary_view_transformation(self): _from = Point(1, 3, 2) to = Point(4, -2, 8) up = Vector(1, 1, 0) t = view_transform(_from, to, up) assert t == Matrix([[-0.50709, 0.50709, 0.67612, -2.36643], [0.76772, 0.60609, 0.12122, -2.82843], [-0.35857, 0.59761, -0.71714, 0.0], [0.0, 0.0, 0.0, 1.0]])
floor.material.refractive_index = 1.333 under = Sphere() under.transformation = translation(0, -.5, 0) * scaling(.25, .25, .25) under.material.color = Color(0, .8, 0) under.material.refractive_index = 1.5 under.material.ambient = .8 above = Sphere() above.transformation = translation(1, .5, 0) * scaling(.5, .5, .5) above.material.color = Color(.2, 0, 0) above.material.diffuse = .8 above.material.ambient = .5 bottom = Plane() bottom.transformation = translation(0, -1.25, 0) bottom.material.pattern = StripePattern(Color.black(), Color(0, .2, .2)) bottom.material.diffuse = .25 bottom.material.ambient = .25 world = World() world.add(floor, under, above, bottom) world.light_source = PointLight(Point(-10, 10, -10), Color.white()) camera = Camera(300, 200, pi / 3) camera.transformation = view_transform(Point(0, 1.5, -5), Point(0, 1, 0), Vector(0, 1, 0)) canvas = camera.render(world) write_ppm_to_file(canvas.to_ppm(), f'..{sep}..{sep}resources{sep}reflect_refract.ppm')
from raytracer.lights import PointLight from raytracer.patterns import * from raytracer.matrices import scaling, rotation_x, rotation_y, rotation_z, translation, view_transform from raytracer.scene import World from raytracer.shapes import Cylinder, Plane from raytracer.tuples import Color, Point, Vector if __name__ == '__main__': floor = Plane() floor.material.color = Color(.8, .8, .8) floor.material.reflective = .2 cylinder = Cylinder(closed=True) cylinder.maximum = 0.25 cylinder.material.color = Color(.8, 0, 0) cylinder.material.reflective = .6 cylinder.transformation = translation(0, 1, 0) world = World() world.add(floor, cylinder) world.light_source = PointLight(Point(-10, 10, -10), Color.white()) camera = Camera(160, 120, pi / 3) camera.transformation = view_transform(Point(0, 1.5, -5), Point( 0, 1, 0), Vector(0, 1, 0)) * rotation_y(-pi / 4) * rotation_x(-pi / 6) canvas = camera.render(world) write_ppm_to_file(canvas.to_ppm(), f'..{sep}..{sep}resources{sep}cylinders.ppm')
def test_view_transformation_moves_the_world(self): _from = Point(0, 0, 8) to = Point(0, 0, 0) up = Vector(0, 1, 0) t = view_transform(_from, to, up) assert t == translation(0, 0, -8)
def test_view_transformation_looking_in_z_positive_direction(self): _from = Point(0, 0, 0) to = Point(0, 0, 1) up = Vector(0, 1, 0) t = view_transform(_from, to, up) assert t == scaling(-1, 1, -1) # reflecting across z and x
def test_view_transformation_for_default_orientation(self): _from = Point(0, 0, 0) to = Point(0, 0, -1) up = Vector(0, 1, 0) t = view_transform(_from, to, up) assert t == Matrix.identity()