Add fat wireframe example

[WestLangley]

First draft. Had to keep it simple.

One clear limitation of "fat lines" is they render in screen-space. Consequently, a solid mesh rendered with a wireframe overlay -- a reasonable use case -- doesn't look very good... Well, it may be OK for "thin fat lines".

[Usnul]

I like the example, but don't like the name, it feels like fat shaming.

[pailhead]

I'm experiencing this #14197, definitely in favor of calling this thick instead of fat. Much better to set thickness than fatness.

[WestLangley]

don't like the name, it feels like fat shaming.

Oh, give me a break.

Much better to set thickness than fatness.

The lines do not have to be thick. We set lineWidth.

[looeee]

Also experiencing #14197.

I don't have a particular problem with the name, but perhaps "thick" is more accurate. Since the parameter is called "width", it makes more sense to be setting the "thickness" than the "fatness".

The lines do not have to be thick. We set lineWidth.

The lines don't have to be fat either.

[XanderLuciano]

Also experiencing #14197 with thicc lines.

Windows 10, GTX 1070, Chrome 66, 69, and Firefox 66.

[WestLangley]

@XanderLuciano That should have been fixed in #14279.

[XanderLuciano]

You're everywhere West! Nice work as usual. Didn't realize that specific fix was a patch in the core library shader portion of the library (as opposed to an issue with THREE.LineMaterial itself).

[pailhead]

Its not a fix in the core.

[mrdoob]

Thanks!

[callumprentice]

Experimenting with this and adding a whole bunch of THREE.Line2(..)s to a base THREE.Object3D().

I calculate a bounding box adjusting the camera and fitting the resulting mesh to the screen using

var bbox = new THREE.Box3().setFromObject(obj3d);

works for other types of geometry but not Line2 - something extra I need to do here?

[WestLangley]

@callumprentice

LineSegmentsGeometry extends InstancedBufferGeometry; positions are updated on the GPU.

Box3.setFromObject() will not work correctly when applied to any object whose vertices are updated on the GPU.

LineSegmentsGeometry.computeBoundingBox() should work, though.

If you need further help, please direct your questions to the forum.