CHANGE QtViewer to have always the axis arrows visible: * in the QtViewer, a random size of axis arrow was given (10.0). Now, the size of arrows is computed from the BoundingBox of the scene * in comparison, the qglviewer computes the arrows from a 'radius' given by the camera
CHANGE QtViewer to have always the axis arrows visible:
* in the QtViewer, a random size of axis arrow was given (10.0). Now, the size of arrows is computed from the BoundingBox of the scene
* in comparison, the qglviewer computes the arrows from a 'radius' given by the camera


Former-commit-id: 73ac09c45862e7773efc52556eb1480370c53a7b
Anatoscope/sofa,hdeling/sofa,FabienPean/sofa,hdeling/sofa,Anatoscope/sofa,hdeling/sofa,hdeling/sofa,FabienPean/sofa,hdeling/sofa,FabienPean/sofa,Anatoscope/sofa,Anatoscope/sofa,FabienPean/sofa,FabienPean/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,hdeling/sofa,Anatoscope/sofa,hdeling/sofa,FabienPean/sofa,FabienPean/sofa,hdeling/sofa,FabienPean/sofa,Anatoscope/sofa,hdeling/sofa,FabienPean/sofa,Anatoscope/sofa,FabienPean/sofa