simgear/simgear/scene/tgdb/userdata.hxx

// userdata.hxx -- two classes for populating ssg user data slots in association
//                 with our implimenation of random surface objects.
//
// Written by David Megginson, started December 2001.
//
// Copyright (C) 2001 - 2003  Curtis L. Olson  - http://www.flightgear.org/~curt
//
// 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.
//
// $Id$


#ifndef _SG_USERDATA_HXX
#define _SG_USERDATA_HXX

#include <simgear/compiler.h>

#include STL_STRING

#include <plib/sg.h>

#include <osg/Referenced>
#include <osg/Geometry>
#include <osg/Group>

SG_USING_STD(string);

class SGMaterial;
class SGMatModel;
class SGMatModelGroup;
class SGModelLib;
class SGPropertyNode;


/**
 * the application must call sgUserDataInit() and specify the
 * following values (needed by the model loader callback at draw time)
 * before drawing any scenery.
 */
void sgUserDataInit( SGModelLib *m, const string &r,
                     SGPropertyNode *p, double t );


/**
 * User data for populating leaves when they come in range.
 */
class SGLeafUserData : public osg::Referenced
{
public:
    bool is_filled_in;
    osg::Geometry *leaf;
    SGMaterial *mat;
    osg::Group *branch;
    float sin_lat;
    float cos_lat;
    float sin_lon;
    float cos_lon;

    void setup_triangle( int i );
};


/**
 * User data for populating triangles when they come in range.
 */
class SGTriUserData : public osg::Referenced
{
public:
    bool is_filled_in;
    float * p1;
    float * p2;
    float * p3;
    osg::Vec3 center;
    double area;
    SGMatModelGroup * object_group;
    osg::Group * branch;
    SGLeafUserData * leafData;
    unsigned int seed;

    void fill_in_triangle();
    void add_object_to_triangle(SGMatModel * object);
    void makeWorldMatrix (sgMat4 ROT, double hdg_deg );
};

#endif // _SG_USERDATA_HXX