I'd suspect the problem is not the ray tracing but the description of the object. Probably, `parametric_plot` produces a description of your shape with tubular segments and with a min_depth=20 it probably produces *very* many of them. So you probably don't get to ray tracing: you're stuck in computing the description of the scene. With smaller numbers for min_depth and max_depth it produces a picture very quickly and with no visible artifacts.
The interface with Tachyon probably ends up constructing the input to Tachyon (which is a text-file description) as a big string in memory, so a scene with very many geometric shapes would indeed pose a significant memory strain (Tachyon would be similarly strained to work with such a description). On Thursday, 2 September 2021 at 10:45:31 UTC-7 brittc...@gmail.com wrote: > I'm running SageMath 9.2 on windows (and also tried 9.0 on Ubuntu). My > specs are: Intel i5-10600K CPU @ 4.10GHz, 32.0 GB RAM, and a RTX 3060 > graphics card. > > When I run the following program, it seems to starts leaking memory until > all 32 GB is consumed, then crashes. I may be doing something silly in the > below example (though it is roughly copy/paste from > http://sporadic.stanford.edu/reference/plot3d/sage/plot/plot3d/tachyon.html > ) > > Or perhaps I simply don't have enough memory--which would be odd > considering I can ray trace much more complicated objects on Blender with > no trouble. > > f = lambda t: (t, t^2, t^3) > t = Tachyon(camera_center=(5,0,4)) > t.texture('t0', ambient=0.1, diffuse=0.9, specular=0.1, opacity=1.0, > color=(1.0,0,0)) > t.light((-20,-20,40), 0.2, (1,1,1)) > t.parametric_plot(f, -10, 10,'t', min_depth=20, max_depth=40) > t.save(filename='parametric.png', verbose=0, extra_opts='') > > Thanks for the time, > Britt > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-support/105debfb-61d2-4cf9-8a9d-ec24b9443263n%40googlegroups.com.
