A little overwrought maybe, but my first module in a long time: https://github.com/rreusser/regl-gpu-lines
it's a product of frustration since things tend to be so rigid that I always just copy paste this sort of thing into my code. so instead, I tried to make it pretty general (too general?).
tl;dr you provide a vertex and a fragment shader.
#pragma statements in the vertex shader specify attributes and varyings as well as functions for computing line geometry (vertex position and width). It sets up the correct attributes, strides, etc and handles all the other details
Feels overwrought, but I'm pretty happy with how usable it actually seems in practice
seems very handy!!
Still making progress! Reworked the geometry and got the varyings unskewed by computing the projected offsets—so that you can do dashes!
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Reminds me of Slimey
@rreusser You may enjoy this paper from Nicholas Rougier, about adding dashes to gl-rendered lines https://jcgt.org/published/0002/02/08/paper.pdf . Not sure if it's the same approach you're using
i love both of these ideas, so many potential applications
I would like to do the planar graph thing, but it feels like I'd need a year :)
at least for surfaces at any rate
for curves you can just subdivide/simplify segments until you get about the same edge length
split long edges, collapse short ones
for surfaces you would probably want to use something like polthier's method which is kind of what they describe in that video very quickly
calculating the forces is actually not that terrible, though the preconditioning step sounds a bit complicated
but i think their split preconditioning scheme is actually not too bad to implement once you grind through the algebra
the hard part in terms of actual coding for repulsive surfaces is definitely that remeshing though
