Move WebGL Marks in a separate package

[martinRenou]

Move WebGL marks to the bqplot-gl package

[martinRenou]

PR tested with https://github.com/bqplot/bqplot-gl in bqplot/bqplot-gl#7 (adding visual tests with Galata and current JS tests soon)

[maartenbreddels]

What about creating a webgl canvas, and letting the marks create a threejs renderer if needed?

[martinRenou]

@maartenbreddels thanks for the review :)

What about creating a webgl canvas, and letting the marks create a threejs renderer if needed?

What would be the upside of this?

[maartenbreddels]

Most of the code in the Figure class can stay as it is (only the line/lines that creates the rendered will change), and we don't need any Figure subclass.

[martinRenou]

Right! Yeah that would be cool. I'll try it this way then.

[maartenbreddels]

This means you can write a threejs, raw WebGL, or Regl marks and mix them.

[martinRenou]

@maartenbreddels the webgl context is now created here in bqplot and we don't need to subclass the Figure

[maartenbreddels]

Yes, very cool!
The only worry I have is that now we don't lazily create the context, like before using createWebGLRenderer (which now should be called createWebGLCanvas I think. Otherwise, we'll create these contexts too often, and the web-browser will show this 'broken' image because we created too many WebGL context.

[martinRenou]

The only worry I have is that now we don't lazily create the context, like before using createWebGLRenderer (which now should be called createWebGLCanvas I think. Otherwise, we'll create these contexts too often, and the web-browser will show this 'broken' image because we created too many WebGL context.

This should be resolved now :)