Render/Viewer

[remmel]

Hello,

I added a render independant file, to render an image from a .ply splat

What will impact your train code:

• I fixed the hardcoded 256x256 limit : 50cbda9#diff-ea4315d833391064c06c3e3446210d78697467d552b96bd5e5343072c1e68d09L163-R179
• I added an assert to check that there is at least points in the frustum : remmel@50cbda9#diff-ea4315d833391064c06c3e3446210d78697467d552b96bd5e5343072c1e68d09R245
• Aside the result/test/image-XXX.png I also save the ply : remmel@deb7ea0#diff-ed183d67207df065a11e1289f19d34cc2abbc5448dea952683cfe9728c342b95R76

If this work is too far from you initial project objective, don't hesitate to refuse the PR

Note, that when trying on ply provided by luma, I don't have exactly same result as antimatter/luma render, which might means that the gauss_render.py implementation slighly differs from theirs

FYI, I'm currently focused on optimising the splat rendering (viewer only, not training), and it tooks 3 secs to render 450k splats (RTX 3060m) whereas it reaches 60fps using webgl antimatter