https://github.com/rantonels/starless

Starless is a CPU black hole raytracer in numpy suitable for both informative diagrams and decent wallpaper material.
https://github.com/rantonels/starless

Last synced: 3 days ago
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Starless is a CPU black hole raytracer in numpy suitable for both informative diagrams and decent wallpaper material.

• Host: GitHub
• URL: https://github.com/rantonels/starless
• Owner: rantonels
• License: gpl-3.0
• Created: 2015-03-05T21:28:27.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2024-06-01T12:06:37.000Z (5 months ago)
• Last Synced: 2024-08-01T22:52:03.445Z (3 months ago)
• Language: Python
• Homepage: http://rantonels.github.io/starless
• Size: 24.9 MB
• Stars: 683
• Watchers: 29
• Forks: 80
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

        
# [Python Black Hole Raytracer](http://rantonels.github.io/starless)

Starless is a CPU black hole raytracer in numpy suitable for both informative diagrams and decent wallpaper material.

It is still in development and will be presented on my site along with [my real time black hole visualizer](http://spiro.fisica.unipd.it/~antonell/schwarzschild). Starless, instead, is not real time but offers greater functionality, performing actual raytracing (while the mentioned WebGL applet uses a precomputed lookup texture for deflection).

## Features

- Full geodesic raytracing in Schwarzschild geometry

- Predicts distortion of arbitrary objects defined implicitly

- Alpha-blended accretion disk

- Optional blackbody mode for accretion disk with realistic redshift (doppler + gravitational)

- Sky distortion

- Dust

- Bloom postprocessing by Airy disk convolution with spectral dependence

- Completely parallel - renders chunks of the image using numpy arrays arithmetic

- Multicore (with multiprocessing)

- Easy debugging by saving masks and intermediate results as images

## (Possible) future features

- Non-stationary observers, aberration, render from inside the event horizon

- Kerr geometry (rotating black holes with frame dragging)

- Integration of time variable, time dependent objects (e.g. orbiting sphere with retarded time rendering) with worldtube-null geodesic intersection

- Generic redshift framework for solid colour objects

## Installation and usage

Please refer to the [Wiki](https://github.com/rantonels/starless/wiki).