Navigation widget

[pjcozzi]

From our Santa experience:

Cleanup the navigation widget and make it reusable like the timeline, etc.

The UI could use some redesign since this was designed for 5-10 year-olds (discussion). In particular, the rotate and orient north buttons could be bigger, and all the separate buttons could be better integrated and have more compelling visuals. Perhaps we can take some lessons from the playback widget?

[pjcozzi]

An idea via @emackey

we could add a round navigation widget on the bottom-right that would balance the look of the timeline (at the risk of making the display look like an Etch-a-sketch, would that be bad? Perhaps I should mock up some screenshots...)

[pjcozzi]

Some progress was made here: discussion and more discussion.

[pjcozzi]

Potential GSoC 2015 project.

[Larcius]

How about this?
https://github.com/Larcius/cesium-navigation

Based on alberto-acevedo cesium-navigation (which was based on terriaJS) I added 2D and Columbus support and changed it to a viewer mixin.

[Larcius]

Examples are available at
http://larcius.github.io/cesium-navigation/

[hpinkos]

Thanks for sharing @Larcius! The zoom in/out behavior is a little wonky in 2D and Columbus View, but it's a good start!

[pjcozzi]

@Larcius could you open a pull request in the cesium-plugins-list repo for cesium-navigation and we'll close this?

[Larcius]

The plugin "Cesium Navigation" is already listed. This plugin refers to @alberto-acevedo repository but all my changes were pulled there.
Meanwhile the wonky zooming as pointed out by @hpinkos was fixed.

[pjcozzi]

Sounds good.

[hpinkos]

@pjcozzi I don't think we should close this. At some point we should have a navigation widget included in our library. I noticed in usability testing that it's the first thing people go for if they're not necessarily familiar with Cesium's mouse controls, and it would be especially useful for tilting since not all mouses have a middle button.

[pjcozzi]

OK, when ready, open an issue with concrete info; this issue just says "navigation widget."