4 ms·
I don't know what the right word for this is (ironic? serendipitious?), but my astonomy friend was just doing this same thing this past week with Blender: "Usi
by mysterydip 5y ago
I don't know what the right word for this is (ironic? serendipitious?), but my astonomy friend was just doing this same thing this past week with Blender:
"Using blender, I've taken my first steps in creating a black hole. Since blender with its ray tracing renderer doesn't allow light to bend and curve like it would through spacetime deformation, I had to incorporate refraction and a lot of lens to emulate the behavior.
The rays from the renderer that I'm using only know how to move in straight lines, however it can handle refraction very well. So long story short, the curvature of spacetime is replaced with a bunch of refracting elements that essentially fill the volume of a sphere. The crucial part is the index of refraction changes, inversely so, within the sphere. Result is a close enough approximation of the black hole."
Results looked similar to some of those in the article.
- isaacimagine 5y agoIf you were able to physically manufacture an object with inversely decreasing index of refraction, would you observe light bend as it does around a black hole? Or do impurities in the substance / difficulty of manufacturing w/ different IORs make this impossible in practice?
- twiceaday 5y agoOur atmosphere is such an object. Air density increases closer to the ground and so does the index of refraction, allowing us to see light that should have missed! https://en.wikipedia.org/wiki/Atmospheric_refraction https://en.wikipedia.org/wiki/Atmospheric_refraction
- MaxikCZ 5y agoIf I understood article correctly, author is doing ray marching, which also "stops the ray" at given distances, and then he reorients the ray. Very similar to your technique, altho here length of each ray leg is calculated differently