01 // Add new dots to the scene
02 void newDot(SoQtRenderArea *renderArea, const SbVec3f dot)
03 {
04    // Pointer to other nodes in the graph 
05    SoGroup *root = (SoGroup *) renderArea->getSceneGraph();
06    SoCoordinate3 *dotCoordinates = (SoCoordinate3 *) root
->getChild(2);
07    SoDotSet *dots = (SoDotSet *) root->getChild(3);
08 
09    // Add coordinates 
10    dotCoordinates->dot.set1Value(dotCoordinates->dot.getNum(), dot);
11    // Get the dot node to draw all the coordinates 
12    dots->numDots.setValue(dotCoordinates->dot.getNum());
13 }