def render(self, camera, world):
"""render world into canvas"""
image = Canvas(camera.horizontal_size_px, camera.vertical_size_px)
for y in range(camera.vertical_size_px):
for x in range(camera.horizontal_size_px):
ray = camera.ray_for_pixel(x, y)
color = world.color_at(ray)
image.set_pixel(x, y, color)
return image
def render_part(self, pid, camera, world, hmin, hmax, part_file):
""" """
tqdm_text = "#" + "{}".format(pid).zfill(3)
image = Canvas(camera.horizontal_size_px, hmax - hmin)
pbar = tqdm(total=hmax - hmin, desc=tqdm_text, position=pid)
for y in range(hmin, hmax):
for x in range(camera.horizontal_size_px):
ray = camera.ray_for_pixel(x, y)
color = world.color_at(ray)
image.set_pixel(x, y - hmin, color)
pbar.update(1)
with open(part_file, 'w') as outf:
outf.write(image.pixels_to_string())
def main():
p = dict(position=point(0, 1, 0),
velocity=multiply(normalize(vector(1, 1.8, 0)), 11.25))
e = dict(gravity=vector(0, -0.1, 0), wind=vector(-0.01, 0, 0))
c = Canvas(900, 550)
while p['position'][1] > 0.0:
print(
f"position {p['position'][0]}, {p['position'][1]}, {p['position'][2]}"
)
c.set_pixel(round(p['position'][0]),
c.height - round(p['position'][1]), color(0.0, 1.0, 0.0))
p = tick(e, p)
with open('cannon.ppm', 'w') as out_file:
out_file.write(c.to_ppm())
def main():
c = Canvas(500, 500)
p = point(0, 0, 1)
translate = translation(250, 0, 250)
scale = scaling(100, 0, 100)
for h in range(12):
r = rotation_y(h * pi / 6)
transform = multiply_matrix(translate, multiply_matrix(scale, r))
p2 = multiply_tuple(transform, p)
print(f"position ({p2[0]}, {p2[1]}, {p2[2]})")
c.set_pixel(round(p2[0]), c.height - round(p2[2]),
color(0.0, 1.0, 0.0))
with open('clock.ppm', 'w') as out_file:
out_file.write(c.to_ppm())
def main():
canvas_pixels = 500
canvas = Canvas(canvas_pixels, canvas_pixels)
shape = Sphere()
# assign material
shape.material = Material()
shape.material.color = color(1, 0.2, 1)
light_position = point(-10, 10, -10)
light_color = color(1, 1, 1)
light = PointLight(light_position, light_color)
ray_origin = point(0, 0, -5)
wall_z = 10
wall_size = 7.0
pixel_size = wall_size / canvas_pixels
half = wall_size / 2
for y in range(canvas_pixels):
world_y = half - pixel_size * y
for x in range(canvas_pixels):
world_x = -half + pixel_size * x
pos = point(world_x, world_y, wall_z)
r = Ray(ray_origin, normalize(subtract(pos, ray_origin)))
xs = shape.intersect(r)
shape_hit = hit(xs)
if shape_hit is not None:
hit_point = r.position_at(shape_hit.t)
normal = shape_hit.object.normal_at(hit_point)
eye = negate(r.direction)
px_color = lighting(shape_hit.object.material,
shape_hit.object, light, hit_point, eye,
normal)
canvas.set_pixel(x, y, px_color)
with open('render_phong_sphere.ppm', 'w') as out_file:
out_file.write(canvas.to_ppm())
def main():
canvas_pixels = 400
canvas = Canvas(canvas_pixels, canvas_pixels)
red = color(1, 0, 0)
shape = Sphere()
# shrink it along the y axis
#shape.set_transform(scaling(1, 0.5, 1))
# shrink it along the x axis
#shape.set_transform(scaling(0.5, 1, 1))
# shrink it, and rotate it!
# shape.set_transform(multiply_matrix(rotation_z(pi / 4), scaling(0.5, 1,
# 1)))
# shrink it, and skew it!
# shape.set_transform(
# multiply_matrix(shearing(1, 0, 0, 0, 0, 0), scaling(0.5, 1, 1)))
ray_origin = point(0, 0, -5)
wall_z = 10
wall_size = 7.0
pixel_size = wall_size / canvas_pixels
half = wall_size / 2
for y in range(canvas_pixels):
world_y = half - pixel_size * y
for x in range(canvas_pixels):
world_x = -half + pixel_size * x
pos = point(world_x, world_y, wall_z)
r = Ray(ray_origin, normalize(subtract(pos, ray_origin)))
xs = shape.intersect(r)
if hit(xs) is not None:
canvas.set_pixel(x, y, red)
with open('render_sphere.ppm', 'w') as out_file:
out_file.write(canvas.to_ppm())