The amazing 3D viewer that is the centerpiece of ChiliPeppr. It knows how to parse Gcode to show it as a 3D representation. Has a simulator built in for the tool path. Also has numerous pubsub signals defined to enable 3rd party tools to inject 3D objects into the viewer.
Rather than branch/revert/patch/pull request... ill just submit a ticket.
THREE.LinePieces has been deprecated.
var line = new THREE.Line(lineGeo, material, THREE.LinePieces);
becomes
var line = new THREE.LineSegments(lineGeo, material);
You can cherry pick from this commit: https://github.com/dchote/widget-3dviewer-rpi/commit/18e6b4f8e8ab43ecc23e52f5cf7c2aaa1ff00e0e