nonl4331 / raytracing-rust Goto Github PK

Currently, there is no documentation for either rt-core, implementations, or frontend.

• Code documentation with cargo doc (100% coverage)
• README.md with examples and project overview
• External articles on nonl.knao.net on the theory and design

The sky sampling test checks if the numerically integrated solution from the generated PDF matches the sampled solution. With large amounts of samples (> 10^6) it becomes evident that while they are very close there are slight differences that cannot be attributed to noise.

The test fails in this case as expected. While the test does fail the image produced should still be unbiased since the sampled pdf does appear to integrate to 1. Furthermore, since the sampled result is similar to the numerically integrated solution this should have a negligible impact on performance.

It is likely that this issue is due to floating-point errors. It is unclear from which bit of the code the error is coming from.

Description
Currently, only Primitives are able to be importance sampled. Also being able to sample NoHit which often is a source of lighting would help scenes converge faster.

Tasks

• Discrete 1D and 2D PDF sampling
• Tests for 1D and 2D Sampling
• Generate 2D (UV) PDF from Texture
• Implementation for Sky
• Tests for NoHit sampling (for Sky)
• MIS code