Editor: Cell border arrows
In PagedWorldspaceWidget scenes beyond each cell border that connects a rendered cell and an unrendered cell an outwards pointing arrow object needs to be added (towards the unrendered cell). Any basic arrow shape should do (either procedurally generated or with a simple model that is added to the OpenCS resources). These arrows will later be used to manipulate the selection of rendered cells.
- The arrows need to be added/removed automatically as the selection of rendered cells changes.
- The arrows need a separate visibility flag, so that they can be switched on/off from the scene toolbar (button not implemented yet).
- When rendered the arrows should always be included in mouse picking query.
- We need a method to match arrow objects to the cells they border. Encoding this information in the OGRE handle seems the easiest method, but there may be other options.
(RM-1280 from redmine: created on 2014-04-14 by Marc Zinnschlag, , closed on 2015-10-26 by Marc Zinnschlag)