Not sure in your environment but in your case I would: render textured sphere (with the deep map) The sphere must be centered in your camera position and have big radius covering whole view area. To avoid seems in polar regions you can use this: simple sphere triangulation then render the BSC Start with dots … Read more
collect Sun ephemerids data for day you need take 1 hour steps and get Suns position in azimuthal coordinates for the geo-location you need. Either use equations you found or use some WEB service like: JPL Horizons don’t like this one as they use some weird output reference frames that does not correspond to my … Read more
This seems like an important topic, so I’ve posted a longer than typical answer: if this algorithm is to be used by others in the future, I think it’s important that it be accompanied by references to the literature from which it has been derived. The short answer As you’ve noted, your posted code does … Read more
I use tabled interpolation instead. Some years back I found this table somewhere: type r g b rrggbb B-V O5(V) 155 176 255 #9bb0ff -0.32 blue O6(V) 162 184 255 #a2b8ff O7(V) 157 177 255 #9db1ff O8(V) 157 177 255 #9db1ff O9(V) 154 178 255 #9ab2ff O9.5(V) 164 186 255 #a4baff B0(V) 156 178 255 … Read more
stellar database google for: BSC (Bright star catalog) ~10K stars up to +6.5 mag (naked eye) Hipparcos ~118K stars up to +12 mag (telescopes) and also has parallax (3D coordinates) and many more Hipparcos is mine favorite. both can be downloaded freely in ASCII format from many Astornomy server just google … planets (bodies) You … Read more