void Command::adjustCameraPosition()
{
Gui::Document* doc = Gui::Application::Instance->activeDocument();
if (doc) {
Gui::View3DInventor* view = static_cast<Gui::View3DInventor*>(doc->getActiveView());
Gui::View3DInventorViewer* viewer = view->getViewer();
SoCamera* camera = viewer->getSoRenderManager()->getCamera();
if (!camera || !camera->isOfType(SoOrthographicCamera::getClassTypeId()))
return;
// get scene bounding box
SoGetBoundingBoxAction action(viewer->getSoRenderManager()->getViewportRegion());
action.apply(viewer->getSceneGraph());
SbBox3f box = action.getBoundingBox();
if (box.isEmpty()) return;
// get cirumscribing sphere and check if camera is inside
SbVec3f cam_pos = camera->position.getValue();
SbVec3f box_cnt = box.getCenter();
SbSphere bs;
bs.circumscribe(box);
float radius = bs.getRadius();
float distance_to_midpoint = (box_cnt-cam_pos).length();
if (radius >= distance_to_midpoint) {
// Move the camera to the edge of the bounding sphere, while still
// pointing at the scene.
SbVec3f direction = cam_pos - box_cnt;
(void) direction.normalize(); // we know this is not a null vector
camera->position.setValue(box_cnt + direction * radius);
// New distance to mid point
distance_to_midpoint =
(camera->position.getValue() - box.getCenter()).length();
camera->nearDistance = distance_to_midpoint - radius;
camera->farDistance = distance_to_midpoint + radius;
camera->focalDistance = distance_to_midpoint;
}
}
}
