* renamed SoFCCSysDragger to SoTransformDragger
* moved TDragger, RDragger and TPlanarDragger to separate files and also renamed them to be more descriptive
This adds SoFCPlacementIndicatorKit - a node that can be used to
show position of object to the user. It can be configured in various
ways so it should be a good base for future unification of features like
this across the application.
Transform gizmo (dragger) used SoAnnotation which disables GL_DEPTH_TEST
resulting in rendering elements in wrong order. This PR introduces new
coin node: So3DAnnotation that delays rendering and clears depth buffer before
drawing which results in proper order of elements. As this destroys
information in the depth buffer it is crucial to run this action after
the scene is rendered.
* [Base] Add hasExtension for multiple values
* [Gui] Use hasExtension for multiple values
* [Drawing] Use hasExtension for multiple values
* [Fem] Use hasExtension for multiple values
* [Import] Use hasExtension for multiple values
* [Mesh] Use hasExtension for multiple values
* [Part] Use hasExtension for multiple values
* [TechDraw] Use hasExtension for multiple values
* On lines where the variable type is obvious from inspection, avoid repeating the type using auto.
* When possible use a ranged for loop instead of begin() and end() iterators
The patch implements context-aware selection and rendering in 3D view.
Please check [here](https://git.io/fjiY5) for more details, including
the following 'Render Caching' section.
The patch also includes modification of View3DInventorViewer to support
always-on-top selection rendering using the secondary selection context
and the new coin node SoFCPathAnnotation.
Another small change in SoQtQuarterAdaptor for more responsive frame
rate display. The original implementation reports skewed frame rate
in the presence of long idle period.
