Add classification type to more entity types

[lilleyse]

classificationType is only available on entity types than can clamp to ground (polygons, rectangles, etc), but it would great to see this for all types (boxes, polyline volumes, and others). It's possible from the Primitive API layer (Classification demo) and would be convenient to add to the entity API.

@bagnell do you know if there are any technical roadblocks to supporting this? It might be a good issue for @loshjawrence to check out during down time while getting asset pipeline development set up.

[hpinkos]

@lilleyse we don't have the concept of a "Classification" at the entity level at all as far as I know. We use GroundPrimitive for corridor, ellipse, polygon and rectangle and use Primitive for all other types.

[mramato]

@hpinkos all of the Entity XXXGraphics that can be clamped to ground have a classificationType property. What @lilleyse is saying is that BoxGraphics and other volumes that don't clamp to ground should still have classificationType as well because they can classify 3D tilesets (as in the linked demo).

[hpinkos]

@mramato yeah, I get that, but we would want a way to determine when to use ClassificationPrimitive and when to use Primitive. I guess it would just be when classificationType is defined?

[mramato]

I see where you're coming from now. Yes we would probably have to use it depending on if it's defined or not. Can ClassificationPrimitive batched?

This is probably a more complicated issue than @lilleyse had in mind for onramping.

[lilleyse]

This is probably a more complicated issue than @lilleyse had in mind for onramping.

Sounds like it. Thanks for the extra details @hpinkos @mramato.