SceneGraph.h

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// Copyright (C) 2005 Dave Griffiths
//
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#include <iostream>
#include "Tree.h"
#include "Primitive.h"
#include "State.h"
#include "ShadowVolumeGen.h"
#include "DepthSorter.h"

using namespace std;

#ifndef N_SCENEGRAPH
#define N_SCENEGRAPH

namespace Fluxus
{

class SceneNode : public Node
{
public:
    SceneNode(Primitive *p) : Prim(p) {}
    virtual ~SceneNode() { if (Prim) delete Prim; }
    Primitive *Prim;
};

istream &operator>>(istream &s, SceneNode &o);
ostream &operator<<(ostream &s, SceneNode &o);

class SceneGraph : public Tree
{
public:
    SceneGraph();
    ~SceneGraph();

    enum Mode{RENDER,SELECT};

    void Render(Mode rendermode=RENDER);
    
    virtual void Clear();
    
    void Detach(SceneNode *node);
    
    dMatrix GetGlobalTransform(const SceneNode *node) const;
    
    void GetBoundingBox(SceneNode *node, dBoundingBox &result);

    ShadowVolumeGen *GetShadowVolumeGen() { return &m_ShadowVolumeGen; }
    
    void GetNodes(const Node *node, vector<const SceneNode*> &nodes) const;

    void GetConnections(const Node *node, 
        vector<pair<const SceneNode*,const SceneNode*> > &connections) const;

private:
    void RenderWalk(SceneNode *node, int depth, Mode rendermode);
    void GetBoundingBox(SceneNode *node, dMatrix mat, dBoundingBox &result);
    bool FrustumClip(SceneNode *node);
    void CohenSutherland(const dVector &p, char &cs);
    
    ShadowVolumeGen m_ShadowVolumeGen;
    DepthSorter m_DepthSorter;
    dMatrix m_TopTransform;
};

}

#endif

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