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sglNode.hpp

/*****************************************************************************
 * SGL: A Scene Graph Library
 *
 * Copyright (C) 1997-2001  Scott McMillan   All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *****************************************************************************
 *     File: sglNode.hpp
 *  Created: 30 December 1997
 *****************************************************************************/

#ifndef __SGL_NODE_HPP
#define __SGL_NODE_HPP

#include <vector>
#include <deque>

#include <sgl.h>
#include <sglTimespec.hpp>
#include <sglIntersect.hpp>
#include <sglPick.hpp>
#include <sglSphereBound.hpp>
#include <sglObject.hpp>
#include <sglFrustum.hpp>
#include <sglMatrix.hpp>

// foward reference this stuff
template <class T> class sglCull;

class sglGroup;
class sglGeode;
class sglDrawable;
class sglGeoSet;
class sglStatelet;

//----------------------------------------------------------------------------

//----------------------------------------------------------------------------

class SGL_DLL_API sglNode : public sglObject
{
public:
   sglNode();
   virtual ~sglNode();

   unsigned int getNumParents() const { return m_parent_list.size(); }

   sglGroup* getParent(unsigned int index) const;

   void setBound(const sglSphereBound<float> *sphere, sglBound::ModeEnum mode);

   const sglSphereBound<float> &getBound();

   sglBound::ModeEnum getBoundMode() const {return m_bound_mode;}

   const sglSphereBound<float> &getPrevBound() const { return m_sphere; }

   struct PreDrawStruct
   {
      unsigned int m_frame_count;
      sglTimespec  m_frame_time;
   };

   virtual void preDraw(const PreDrawStruct &trav_state);

   virtual void computeTxToParent(sglMat4f &) const {}

   virtual void computeTxToParent(sglMat4d &) const {}

   virtual sglBound::IntersectResultEnum intersect(sglIntersectf &) const
      {
         return sglBound::eOUTSIDE;
      }

   virtual sglBound::IntersectResultEnum intersect(sglIntersectd &) const
      {
         return sglBound::eOUTSIDE;
      }

   virtual void pick(sglPickf &, unsigned int) const {}

   virtual void pick(sglPickd &, unsigned int) const {}

   virtual void cull(sglCull<float> &trav_state,
                     unsigned int cull_flags) const = 0;

   virtual void cull(sglCull<double> &trav_state,
                     unsigned int cull_flags) const = 0;

   virtual sglNode *clone(unsigned int mode) const = 0;

   // See sglObject::printInfo() for details.
   virtual void printInfo(ostream &ostrm, const char *indent_string) const;

protected:
   virtual void computeBound() = 0; // this node only - no traversal
   virtual void computeBoundsRecursiveDown(); // downward trav

   // bit or the dirty bits with the given mask
   virtual void dirty(unsigned char mask);

   // used by the clone traversal
   void copyTo(sglNode *dst, unsigned int mode) const;

   friend class sglDrawable;

private:
   friend class sglGroup;
   void addParent(sglGroup *parent);
   void removeParent(sglGroup *parent);

   // not implemented
   sglNode(const sglNode &);
   sglNode &operator=(const sglNode &);

protected:
   sglSphereBound<float> m_sphere;
   sglBound::ModeEnum m_bound_mode;

   enum DirtyEnum { eBOUND = 0x01, eDLIST = 0x02, eANIMATION = 0x04 };
   unsigned char m_dirty;

private:
   vector<sglGroup*> m_parent_list;
};

#endif

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