add MiterLimits()

[munusshih]

Resolves #[Add issue number here]

Changes:

• Add function miterLimit()
• Add its documentation

Screenshots of the change:

PR Checklist

• npm run lint passes
• Inline documentation is included / updated
• Unit tests are included / updated

[davepagurek]

There's also a currently hardcoded miter limit in WebGL here:

p5.js/src/webgl/shaders/line.vert

Line 185 in c06e12a

float maxMag = 3. * uStrokeWeight;

It would be great to eventually replace that with the same limit as in 2D mode, probably by passing the value in as a shader uniform. Doesn't need to be part of this PR necessarily, though -- maybe just file an issue for it so we can remember to add it to WebGL too later?

[Qianqianye]

Thanks @munusshih for working on it and @limzykenneth @davepagurek for reviewing. Just following up on this PR, is there a plan to get this PR merged soon, @munusshih? Please let us know if you need any support from us and the GSoC mentors @kyeah @aahdee.

[munusshih]

Yes. I think this is ready for review.

[Qianqianye]

Thanks @munusshih. Tagging mentors and advisors to review this @aahdee @kyeah @limzykenneth

[limzykenneth]

@munusshih I'm seeing an error with FES when trying to use miterLimit():

Uncaught TypeError: queryResult is undefined

The unit test are not passing as well with:

TypeError: this._renderer.miterLimit is not a function
      at _main.default.miterLimit (http://localhost:9001/lib/p5.js:68394:26)

Can you have a look, the problem is likely that the miterLimit function is only registered in p5.renderer2D and not p5.renderer.

[dhowe]

whats the status on this ?