Fresnel¶

fresnel is a python library for path tracing publication quality images of soft matter simulations in real time. The fastest render performance is possible on NVIDIA GPUs using their OptiX ray tracing engine. fresnel also supports multi-core CPUs using Intel’s Embree ray tracing kernels. Path tracing enables high quality global illumination and advanced rendering effects controlled by intuitive parameters (like roughness, specular, and metal).

Samples¶

Here are a few quick samples of what fresnel can do:

import fresnel, numpy, PIL

data = numpy.load('spheres.npz')

scene = fresnel.Scene()
scene.lights = fresnel.light.cloudy()

geometry = fresnel.geometry.Sphere(
    scene,
    position = data['position'],
    radius = 0.5,
    outline_width = 0.1)

geometry.material = fresnel.material.Material(
    color = fresnel.color.linear([0.1, 0.8, 0.1]),
    roughness = 0.8,
    specular = 0.2)

out = fresnel.pathtrace(scene, samples=64, light_samples=32, w=500, h=500)

import fresnel, numpy, math, PIL

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

scene = fresnel.Scene()
scene.lights = fresnel.light.lightbox()

geometry = fresnel.geometry.ConvexPolyhedron(
    scene,
    origins = [[-data['width'][0],0,0], [data['width'][0],0,0], [0, -data['width'][1], 0],
               [0, data['width'][1], 0], [0, 0, -data['width'][2]], [0, 0, data['width'][2]]],
    normals = [[-1,0,0], [1,0,0], [0, -1, 0],
               [0, 1, 0],[0, 0, -1], [0, 0, 1]],
    r = math.sqrt(data['width'][0]**2 + data['width'][1]**2 + data['width'][2]**2),
    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.fit(scene, view='front')

out = fresnel.pathtrace(scene, samples=64, light_samples=32, w=500, h=500)

Getting started

Basic tutorials

Primitives

Advanced topics

Python API Reference

fresnel

Additional information