Show HN: 3D Vector Graphics

#1

Post by fogleman » Tue, Feb 02, 2016, 3:20 PM UTC

Re: Show HN: 3D Vector Graphics

#2

Post by WhiteNoiz3 » Tue, Feb 02, 2016, 4:08 PM UTC

That's pretty cool. A commandline app that just takes an .OBJ file and renders it to an .SVG would actually be pretty useful (viewport position / orientation would of course need to be options as well).

Re: Show HN: 3D Vector Graphics

#3

Post by cirocosta » Tue, Feb 02, 2016, 4:19 PM UTC

WhiteNoiz3 wrote: post #2

That's pretty cool. A commandline app that just takes an .OBJ file and renders it to an .SVG would actually be pretty useful (viewport position / orientation would of course need to be options as well).

Agree! That'd be pretty cool

Re: Show HN: 3D Vector Graphics

#4

Post by IshKebab » Tue, Feb 02, 2016, 4:24 PM UTC

Nice work!

Re: Show HN: 3D Vector Graphics

#5

Post by echelon » Tue, Feb 02, 2016, 4:27 PM UTC

This is fantastic! I think I can use this in my laser projection work. :)

Re: Show HN: 3D Vector Graphics

#6

Post by fogleman » Tue, Feb 02, 2016, 4:29 PM UTC

echelon wrote: post #5

This is fantastic! I think I can use this in my laser projection work. :)

Glad to hear. Let me know if you have any questions.

Re: Show HN: 3D Vector Graphics

#7

Post by fogleman » Tue, Feb 02, 2016, 4:31 PM UTC

WhiteNoiz3 wrote: post #2

That's pretty cool. A commandline app that just takes an .OBJ file and renders it to an .SVG would actually be pretty useful (viewport position / orientation would of course need to be options as well).

Even cooler if I could figure out some general way of parameterizing & texturing the surface instead of just rendering the triangles. Any ideas?

Re: Show HN: 3D Vector Graphics

#8

Post by artursapek » Tue, Feb 02, 2016, 4:40 PM UTC

This is fantastic. I love programming geometry. This must be a lot of fun to work on.

That gif at the bottom is mind bending https://camo.githubusercontent.com/9f83ca714a35fd2a08b85370f...

Re: Show HN: 3D Vector Graphics

#9

Post by scrumper » Tue, Feb 02, 2016, 4:42 PM UTC

This looks pretty great, I'll play with it. Can you explain this from the Readme?

Unfortunately, it's difficult to compute the joint formed at the boundaries of these combined shapes, so sufficient texturing is needed on the original solids for a decent result.

What is hard about computing the joint? Why does texturing help? My question is from a perspective of curious ignorance, not arrogance (i.e. me saying "don't be silly, it's easy.")

Re: Show HN: 3D Vector Graphics

#10

Post by jasonwatkinspdx » Tue, Feb 02, 2016, 4:51 PM UTC

fogleman wrote: post #7

WhiteNoiz3 wrote: post #2

That's pretty cool. A commandline app that just takes an .OBJ file and renders it to an .SVG would actually be pretty useful (viewport position / orientation would of course need to be options as well).

Even cooler if I could figure out some general way of parameterizing & texturing the surface instead of just rendering the triangles. Any ideas?

Hughes Hoppe has done a variety of research that depends on finding interesting parameterizations of meshes. His papers aren't exactly lightweight on the math, but you may find some ideas there:

http://research.microsoft.com/en-us/um/people/hoppe/

http://research.microsoft.com/en-us/um/people/hoppe/proj/vfd...

http://research.microsoft.com/en-us/um/people/hoppe/proj/lap...