Share the same user interactions

[ahocevar]

Idea: same keyboard and pointer interactions in both ol3 and Cesium.

E.g. shortcut to rotate a map in ol3 as to rotate the globe in cesium. For now, we have:

• rotation:
  • ol3js: shift - drag
  • cesiumjs: control - drag

[klokan]

Probably these key controls:

• ctrl - tilting
• alt - look around
• shift dragging - drag zoom via DragBox interaction #13
• alt-shift - tilt or roll the camera? - probably tilt - the same as ctrl

[ebelo]

In Google maps, shift-drag:

• vertical: tilt the view
• horizontal: rotate the map

[klokan]

Discussed on kick-off and initially implemented in #16.

For more specific request lets open a new issue in future.