anchor.diff:  
   ;;;; Group: Scene graph
   
  -;; void pickRay(NodeHandle cameraNode, float nwx, float nwy, float *ox, float *oy, float *oz, float *dx, float *dy, float *dz );
  +;; void pickRay( NodeHandle cameraNode, float nwx, float nwy,
  +;;               float *ox, float *oy, float *oz, float *dx, float *dy, float *dz );
   (defh3ufun ("pickRay" pick-ray) void
     "*      Calculates the ray originating at the specified camera and window coordinates
   
  
positive.code:   (parent node-handle) (name string) (sound-resource resource-handle))
  
  
  ;;; DLL bool isSoundPlaying( NodeHandle soundNode );
  (defh3fun ("isSoundPlaying" sound-playing-p) boolean
    "Checks if an Sound node is playing.
  
  
negative.code:   (parent node-handle) (name string))
  
  
  ;;; NodeHandle getActiveListener();
  (defh3fun ("getActiveListener" get-active-listener) node-handle
    "Returns the handle of the active Listener node.
  
  