ray_gray

3 ms·

1. 1.▲
   by ray_gray 7y ago

   That's actually how the displacement of the intersection is done here - marching in the range between spheres. Bisection, however, wont work at shallow angles.
2. 2.▲
   by ray_gray 7y ago

   Thanks to all for the feedback and comments! @rcarmo Yes, bumps are enhanced, to make the surface more dramatic. This scale is a parameter in the notebook, it can be set to the realistic 1.15% of the mean radius. On another forum, someone p
3. 3.▲
   by ray_gray 7y ago

   Yes, 118m resolution, it is from: https://astrogeology.usgs.gov/search/details/Moon/LRO/LOLA/L... All other sources (surface color, star map in the background) are referenced in notebooks, gallery,
4. 4.▲
   by ray_gray 7y ago

   PlotOptiX requires NVIDIA GPU. I used GTX1060/6GB on a laptop for most of the work. Tested also on a desktop RTX1070/8GB, much better fps, of course. Video is done on RTX. In Google Cloud, on V100, runs even faster, but GUI is mor
5. 5.▲
   by ray_gray 7y ago

   Ray-tracing is done in a Python notebook. Data originates from NASA public resources. I searched for the highest resolution data to make the Moon almost touchable. So it is made of 118m elevetion model and 480m surface color. There is also
6. 6.▲
   Show HN: Data-viz project for ray-tracing the Moon model(github.com)

   72 points by ray_gray 7y ago|11 comments