162 lines
4.7 KiB
C++
162 lines
4.7 KiB
C++
// genobj.hxx -- Generate the flight gear "obj" file format from the
|
|
// triangle output
|
|
//
|
|
// Written by Curtis Olson, started March 1999.
|
|
//
|
|
// Copyright (C) 1999 Curtis L. Olson - curt@flightgear.org
|
|
//
|
|
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
//
|
|
// $Id$
|
|
// (Log is kept at end of this file)
|
|
|
|
|
|
#ifndef _GENOBJ_HXX
|
|
#define _GENOBJ_HXX
|
|
|
|
|
|
#ifndef __cplusplus
|
|
# error This library requires C++
|
|
#endif
|
|
|
|
|
|
#include <Include/compiler.h>
|
|
|
|
#include STL_STRING
|
|
|
|
#include <Bucket/newbucket.hxx>
|
|
#include <Math/fg_geodesy.hxx>
|
|
#include <Math/point3d.hxx>
|
|
|
|
#include <GenFans/genfans.hxx>
|
|
#include <Main/construct_types.hxx>
|
|
#include <Triangulate/triangle.hxx>
|
|
|
|
FG_USING_STD(string);
|
|
FG_USING_STD(vector);
|
|
|
|
|
|
typedef vector < int_list > belongs_to_list;
|
|
typedef belongs_to_list::iterator belongs_to_list_iterator;
|
|
typedef belongs_to_list::const_iterator belongs_to_list_tripoly_iterator;
|
|
|
|
|
|
class FGGenOutput {
|
|
|
|
private:
|
|
|
|
// node list in geodetic coordinats
|
|
point_list geod_nodes;
|
|
|
|
// node list in cartesian coords (wgs84 model)
|
|
point_list wgs84_nodes;
|
|
|
|
// face normal list (for flat shading)
|
|
point_list face_normals;
|
|
|
|
// normal list (for each point) in cart coords (for smooth
|
|
// shading)
|
|
point_list point_normals;
|
|
|
|
// triangles (by index into point list)
|
|
triele_list tri_elements;
|
|
|
|
// fan list
|
|
fan_list fans[FG_MAX_AREA_TYPES];
|
|
|
|
// for each node, a list of triangle indices that contain this node
|
|
belongs_to_list reverse_ele_lookup;
|
|
|
|
// global bounding sphere
|
|
Point3D gbs_center;
|
|
double gbs_radius;
|
|
|
|
// build the wgs-84 point list
|
|
void gen_wgs84_points( const FGArray& array );
|
|
|
|
// build the node -> element (triangle) reverse lookup table.
|
|
// there is an entry for each point containing a list of all the
|
|
// triangles that share that point.
|
|
void gen_node_ele_lookup_table();
|
|
|
|
// calculate the normals for each point in wgs84_nodes
|
|
void gen_normals();
|
|
|
|
// build the face normal list
|
|
void gen_face_normals();
|
|
|
|
// caclulate the normal for the specified triangle face
|
|
Point3D calc_normal( int i );
|
|
|
|
// calculate the global bounding sphere. Center is the average of
|
|
// the points.
|
|
void calc_gbs();
|
|
|
|
// caclulate the bounding sphere for a list of triangle faces
|
|
void calc_group_bounding_sphere( const fan_list& fans,
|
|
Point3D *center, double *radius );
|
|
|
|
// caclulate the bounding sphere for the specified triangle face
|
|
void calc_bounding_sphere( const FGTriEle& t,
|
|
Point3D *center, double *radius );
|
|
|
|
public:
|
|
|
|
// Constructor && Destructor
|
|
inline FGGenOutput() { }
|
|
inline ~FGGenOutput() { }
|
|
|
|
// build the necessary output structures based on the
|
|
// triangulation data
|
|
int build( const FGArray& array, const FGTriangle& t );
|
|
|
|
// write out the fgfs scenery file
|
|
int write( const string& base, const FGBucket& b );
|
|
};
|
|
|
|
|
|
#endif // _GENOBJ_HXX
|
|
|
|
|
|
// $Log$
|
|
// Revision 1.8 1999/03/30 23:50:44 curt
|
|
// Modifications to fanify by attribute.
|
|
//
|
|
// Revision 1.7 1999/03/29 13:11:04 curt
|
|
// Shuffled stl type names a bit.
|
|
// Began adding support for tri-fanning (or maybe other arrangments too.)
|
|
//
|
|
// Revision 1.6 1999/03/27 14:06:43 curt
|
|
// Tweaks to bounding sphere calculation routines.
|
|
// Group like triangles together for output to be in a single display list,
|
|
// even though they are individual, non-fanified, triangles.
|
|
//
|
|
// Revision 1.5 1999/03/27 05:23:23 curt
|
|
// Interpolate real z value of all nodes from dem data.
|
|
// Write scenery file to correct location.
|
|
// Pass along correct triangle attributes and write to output file.
|
|
//
|
|
// Revision 1.4 1999/03/25 19:04:22 curt
|
|
// Preparations for outputing scenery file to correct location.
|
|
//
|
|
// Revision 1.3 1999/03/23 22:02:04 curt
|
|
// Worked on creating data to output ... normals, bounding spheres, etc.
|
|
//
|
|
// Revision 1.2 1999/03/23 17:44:49 curt
|
|
// Beginning work on generating output scenery.
|
|
//
|
|
// Revision 1.1 1999/03/22 23:51:51 curt
|
|
// Initial revision.
|
|
//
|