01 void tickerCallback(void *data, SoSensor *)
02 {
03    // Pointer to camera
04    SoCamera *camera = (SoCamera *) data;
05    SbRotation rot;
06    SbMatrix   mtx;
07    SbVec3f    pos;
08
09    // Rotate camera
10    pos = camera->position.getValue();
11    rot = SbRotation(SbVec3f(0,1,0), ROTATION_ANGLE);
12    mtx.setRotate(rot);
13    mtx.multVecMatrix(pos, pos);
14    camera->position.setValue(pos);
15
16    // Correct orientation of camera
17    camera->orientation.setValue(camera
->orientation.getValue() * rot);
18 }