3D measuring tool

[Pessimistress]

To test locally:

git checkout x/measure-layer
yarn bootstrap
cd test/app/measure
yarn start-local

There are several ways we can package this. Changes to the core can be published as streetscape.gl@1.1.0-alpha (it depends on a non-production release of deck.gl). The TapeMeasureLayer (where majority of the logic is) can either be

• ported into nebula.gl
• published via @streetscape.gl/layers

ChangeList

• Bump deck.gl to 7.4.0-alpha.1 (with 3d picking feature)
• Upgrade PointCloudLayer to use deck.gl@7.2's shader hooks (required by 3d picking)
• Add test app

@supersonicclay @marionleborgne @jlisee

[ibgreen]

This looks really neat! And as far as I can see this tool does not have any react dependencies which is great.

These are just longer term thoughts:

It would be great if for next release we could unbundle this from streetscape and put this in a helper module in e.g. deck.gl or nebula.gl.

Perhaps there is opportunity to create a "toolkit" for such measuring tools, e.g.

• an area calculation tool (which we presumably would want to build on nebula polygon rendering).
• a volume calculation tool
• a point cloud volume point counter tool
• a base class for user to create custom tools...

And perhaps the user could declaratively specify a selection of these tools, making them accessible in pydeck and the playground as well?

[ibgreen]

@romaxa FYI

[coveralls]

Coverage decreased (-0.3%) to 14.942% when pulling 43ade3d on x/measure-layer into cf5dd9a on master.

[supersonicclay]

I'd love to see this functionality in nebula.gl. I think we have a lot of the plumbing in place to be able to support this.

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[supersonicclay]

We have distance and angle measurement tools in nebula now. Can we refactor this PR to use it?

[alexnaughtonjr]

Nice!