Cuboids

Cuboid example script:

• Geometry: geometry.ConvexPolyhedron: outline_width = 0.015

  • material: roughness = 0.1, specular = 1, metal = 0, spec_trans = 0

  • outline_material: roughness = 0.1, metal = 1, spec_trans = 0, color = (0.95,0.93,0.88)

  • position, orientation: output of a HOOMD simulation

• Lighting: light.lightbox

• Rendered with: tracer.Path: samples = 256, light_samples = 16

Source code

# Copyright (c) 2016-2025 The Regents of the University of Michigan
# Part of fresnel, released under the BSD 3-Clause License.

"""Cuboid example scene."""

import fresnel
import numpy
import PIL
import sys
import os

data = numpy.load("cuboids.npz")

scene = fresnel.Scene()
scene.lights = fresnel.light.lightbox()
W, H, D = data["width"]
poly_info = fresnel.util.convex_polyhedron_from_vertices(
    [
        [-W, -H, -D],
        [-W, -H, D],
        [-W, H, -D],
        [-W, H, D],
        [W, -H, -D],
        [W, -H, D],
        [W, H, -D],
        [W, H, D],
    ]
)

geometry = fresnel.geometry.ConvexPolyhedron(
    scene,
    poly_info,
    position=data["position"],
    orientation=data["orientation"],
    outline_width=0.015,
)
geometry.material = fresnel.material.Material(
    color=fresnel.color.linear([0.1, 0.1, 0.6]), roughness=0.1, specular=1
)
geometry.outline_material = fresnel.material.Material(
    color=(0.95, 0.93, 0.88), roughness=0.1, metal=1.0
)

scene.camera = fresnel.camera.Orthographic.fit(scene, view="front")

if "CI" in os.environ:
    samples = 1
else:
    samples = 64

out = fresnel.pathtrace(scene, samples=samples, light_samples=32, w=580, h=580)
PIL.Image.fromarray(out[:], mode="RGBA").save("cuboid.png")

if len(sys.argv) > 1 and sys.argv[1] == "hires":
    out = fresnel.pathtrace(scene, samples=256, light_samples=16, w=1380, h=1380)
    PIL.Image.fromarray(out[:], mode="RGBA").save("cuboid-hires.png")

Author

Joshua A. Anderson