Change log¶

v0.8.0 (2019-03-05)¶

Add util.convex_polyhedron_from_vertices: compute convex polyhedron plane origins and normals given a set of vertices
Improve documentation
Add interact.SceneView: pyside2 widget for interactively rendering scenes with path tracing
Add geometry.Mesh: Arbitrary triangular mesh geometry, instanced with N positions and orientations
fresnel development is now hosted on github: https://github.com/glotzerlab/fresnel/
Improve light.lightbox lighting setup
API breaking changes:
- geometry.ConvexPolyhedron arguments changed. It now accepts polyhedron information as a dictionary.

Implement tracer.Path on the GPU.
Implement ConvexPolyhedron geometry on the GPU.
Improve path tracer performance with Russian roulette termination.
Compile warning-free.
Fix sphere intersection test bugs on the GPU.
tracer.Path now correctly starts sampling over when resized.
Wrap C++ code with pybind 2.2
Make documentation available on readthedocs: http://fresnel.readthedocs.io
Fresnel is now available on conda-forge: https://anaconda.org/conda-forge/fresnel
embree >= 3.0 is now required for CPU support
Improve documentation

Add new lighting setups
- lightbox
- cloudy
- ring
Adjust brightness of lights in existing setups
Remove clearcoat material parameter
Add spec_trans material parameter
Add Path tracer to render scenes with indirect lighting, reflections, and transparency (CPU-only)
Add ConvexPolyhedron geometry (CPU-only, beta API, subject to change)
Add fresnel.preview function to easily generate Preview traced renders with one line
Add fresnel.pathtrace function to easily generate Path traced renders with one line
Add anti-aliasing (always on for the Path tracer, set aa_level > 0 to enable for Preview)
API breaking changes:
- render no longer exists. Use preview or pathtrace.
- tracer.Direct is now tracer.Preview.

CPU-only features will be implemented on the GPU in a future release.

Enforce requirement: Embree >= 2.10.0
Enforce requirement Pybind =1.8.1
Enforce requirement TBB >= 4.3
Rewrite camera API, add camera.fit to fit the scene
scenes default to an automatic fit camera
Implement area lights, add default lighting setups
Scene now supports up to 4 lights, specified in camera space
Implement Disney’s principled BRDF
Tracer.histogram computes a histogram of the rendered image
Tracer.enable_highlight_warning highlights overexposed pixels with a given warning color
Device.available_modes lists the available execution modes
Device.available_gpus lists the available GPUs
Device can now be limited to n GPUs
API breaking changes:
- camera.Orthographic is now camera.orthographic
- Device now takes the argument n instead of limit
- Scene no longer has a light_direction member