/* -*-c++-*-
 *
 * Copyright (C) 2006-2007 Mathias Froehlich 
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 *
 */

#ifndef SG_SCENE_USERDATA_HXX
#define SG_SCENE_USERDATA_HXX

#include <vector>
#include <osg/Node>
#include <osg/Object>
#include <simgear/scene/bvh/BVHNode.hxx>
#include "SGPickCallback.hxx"

class SGSceneUserData : public osg::Object {
public:
  META_Object(simgear, SGSceneUserData);
  SGSceneUserData() {}
  SGSceneUserData(const SGSceneUserData& rhs,
                  const osg::CopyOp& copyOp = osg::CopyOp::SHALLOW_COPY)
    : _bvhNode(rhs._bvhNode), _velocity(rhs._velocity),
      _pickCallbacks(rhs._pickCallbacks)
  {
  }
  static SGSceneUserData* getSceneUserData(osg::Node* node);
  static const SGSceneUserData* getSceneUserData(const osg::Node* node);
  static SGSceneUserData* getOrCreateSceneUserData(osg::Node* node);

  /// Access to the pick callbacks of a node.
  unsigned getNumPickCallbacks() const;
  SGPickCallback* getPickCallback(unsigned i) const;
  void setPickCallback(SGPickCallback* pickCallback);
  void addPickCallback(SGPickCallback* pickCallback);

  const simgear::BVHNode* getBVHNode() const
  { return _bvhNode; }
  simgear::BVHNode* getBVHNode()
  { return _bvhNode; }
  void setBVHNode(simgear::BVHNode* bvhNode)
  { _bvhNode = bvhNode; }

  struct Velocity : public SGReferenced {
    Velocity() :
        linear(SGVec3d::zeros()),
        angular(SGVec3d::zeros()),
        referenceTime(0),
        id(simgear::BVHNode::getNewId())
    {}
    SGVec3d linear;
    SGVec3d angular;
    double referenceTime;
    simgear::BVHNode::Id id;
  };
  const Velocity* getVelocity() const
  { return _velocity; }
  Velocity* getOrCreateVelocity()
  { if (!_velocity) _velocity = new Velocity; return _velocity; }
  void setVelocity(Velocity* velocity)
  { _velocity = velocity; }
  
private:
  // If this node has a collision tree attached, it is stored here
  SGSharedPtr<simgear::BVHNode> _bvhNode;

  // Velocity in the childs local coordinate system
  SGSharedPtr<Velocity> _velocity;

  /// Scene interaction callbacks
  std::vector<SGSharedPtr<SGPickCallback> > _pickCallbacks;
};

#endif
