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I always wondered if HTM spheres are a worthwhile solution for lower sized textures. You start with 8 equilateral triangles that make up the sphere and subdivid
by seanalltogether 8y ago
I always wondered if HTM spheres are a worthwhile solution for lower sized textures. You start with 8 equilateral triangles that make up the sphere and subdivide as needed. You could possibly use a square texture made of 8 right triangles that each need minimal distortion (as opposed to an equirectangular texture).
https://arxiv.org/ftp/cs/papers/0701/0701164.pdf https://arxiv.org/ftp/cs/papers/0701/0701164.pdf
- psurge 8y agoThe WorldWide Telescope uses this exact idea: http://www.worldwidetelescope.org/docs/worldwidetelescopeprojectionreference.html#TOASTProjection http://www.worldwidetelescope.org/docs/worldwidetelescopepro... There are also other interesting spherical tessellations that could be used - one is implemented in Google's S2 geometry library, the other, HEALPix, is used for astronomical datasets: http://s2geometry.io/resources/earthcube http://s2geometry.io/resources/earthcube http://iopscience.iop.org/article/10.1086/427976/pdf http://iopscience.iop.org/article/10.1086/427976/pdf
- Asooka 8y agoAnd you could use ptex textures to have a regular pixel density.
- FreeFull 8y agoAlternatively, you could maybe use a cube map. You would still have a bit of distortion, but that could be handled during the video generation anyway.