Is it possible to draw curves?

[davibarreira]

In three.js, I see that it is possible to draw curves, such as Beziers and Nurbs. Moreover, one can even draw curved surfaces. I was wondering if there is a way to do this using meshcat.

[ferrolho]

Hi Davi, you can draw curved lines (see this comment and an example here) and contours as well (see the README example).

[davibarreira]

Thanks for the answer @ferrolho . If I understood, is your solution for curved lines to divide in several line segments? I was looking for Bezier curves and the like.

[ferrolho]

Yes, you understood correctly — I sample a few points along the curved line I want to display, and then display it. It seems three.js supports quadratic bezier curves (see https://threejs.org/docs/#api/en/extras/curves/QuadraticBezierCurve), but I don't think this feature is exposed in MeshCat.jl. If you give it a go, please feel free to open a PR. Thanks!

[davibarreira]

Thanks, I'll try to do so.

[davibarreira]

@ferrolho , the implementation of curves should be done on MeshCat.jl or on the original meshcat library?

[ferrolho]

I am not sure why I missed your comment... So, apologies for the really long delay in replying. Exposing something from three.js to meshcat will have to be done in the core library — https://github.com/meshcat-dev/meshcat. Then, once that is exposed, you should be able to use it from MeshCat.jl or meshcat-python.