Changed signature off GlutPrimitiveNode::add_primitive. (In a backwards...

Changed signature off GlutPrimitiveNode::add_primitive. (In a backwards compatible fashion, that is.)

git-svn-id: http://www.openflipper.org/svnrepo/OpenFlipper/branches/Free@19834 383ad7c9-94d9-4d36-a494-682f7c89f535

ACG/Scenegraph/GlutPrimitiveNode.cc

@@ -285,12 +285,13 @@ draw(GLState& _state, const DrawModes::DrawMode& _drawMode)
 
 //----------------------------------------------------------------------------
 
-void 
+size_t
 GlutPrimitiveNode::
 add_primitive(GlutPrimitiveType _type, Vec3d _pos, Vec3d _axis, ACG::Vec4f _color)
 {
   Primitive p(_type, _pos, _axis, _color);
   primitives_.push_back(p);
+  return primitives_.size() - 1;
 }
 
 //----------------------------------------------------------------------------

ACG/Scenegraph/GlutPrimitiveNode.hh

@@ -178,7 +178,12 @@ public:
   /// destructor
   virtual ~GlutPrimitiveNode() {}
 
-  void add_primitive(GlutPrimitiveType _type, Vec3d _pos, Vec3d _axis, ACG::Vec4f _color);
+  /**
+   * Adds a primitive and returns its index.
+   *
+   * @return the index of the new primitive.
+   */
+  size_t add_primitive(GlutPrimitiveType _type, Vec3d _pos, Vec3d _axis, ACG::Vec4f _color);
 
   void clear(){primitives_.clear();};