1 // fragment.hxx -- routines to handle "atomic" display objects
3 // Written by Curtis Olson, started August 1998.
5 // Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 // (Log is kept at end of this file)
30 # error This library requires C++
46 #include <Bucket/bucketutils.h>
47 // #include <Include/fg_types.h>
48 #include "Include/fg_constants.h"
49 #include <Math/mat3.h>
50 #include <Math/point3d.hxx>
52 #include <Include/compiler.h>
53 //FG_USING_NAMESPACE(std);
56 // Maximum nodes per tile
57 #define MAX_NODES 2000
60 // Forward declarations
64 // Object fragment data class
71 fgFACE( int a = 0, int b =0, int c =0 )
72 : n1(a), n2(b), n3(c) {}
74 fgFACE( const fgFACE & image )
75 : n1(image.n1), n2(image.n2), n3(image.n3) {}
77 fgFACE& operator= ( const fgFACE & image ) {
78 n1 = image.n1; n2 = image.n2; n3 = image.n3; return *this;
85 // culling data for this object fragment (fine grain culling)
87 double bounding_radius;
89 // variable offset data for this object fragment for this frame
90 // fgCartesianPoint3d tile_offset;
92 // saved transformation matrix for this fragment (used by renderer)
93 // GLfloat matrix[16];
95 // tile_ptr & material_ptr are set so that when we traverse the
96 // list of fragments we can quickly reference back the tile or
97 // material property this fragment is assigned to.
99 // material property pointer
100 fgMATERIAL *material_ptr;
105 // OpenGL display list for fragment data
108 // face list (this indexes into the master tile vertex list)
109 typedef vector < fgFACE > container;
110 typedef container::iterator iterator;
111 typedef container::const_iterator const_iterator;
117 // number of faces in this fragment
122 // Add a face to the face list
123 void add_face(int n1, int n2, int n3) {
124 faces.push_back( fgFACE(n1,n2,n3) );
127 // test if line intesects with this fragment. p0 and p1 are the
128 // two line end points of the line. If side_flag is true, check
129 // to see that end points are on opposite sides of face. Returns
130 // 1 if it intersection found, 0 otherwise. If it intesects,
131 // result is the point of intersection
132 int intersect( const Point3D& end0,
135 Point3D& result) const;
138 fgFRAGMENT () { /*faces.reserve(512);*/}
139 fgFRAGMENT ( const fgFRAGMENT &image );
142 ~fgFRAGMENT() { faces.erase( faces.begin(), faces.end() ); }
145 fgFRAGMENT & operator = ( const fgFRAGMENT & rhs );
147 bool operator < ( const fgFRAGMENT & rhs ) const {
148 // This is completely arbitrary. It satisfies RW's STL implementation
149 return bounding_radius < rhs.bounding_radius;
153 faces.erase( faces.begin(), faces.end() );
156 int deleteDisplayList() const {
157 xglDeleteLists( display_list, 1 ); return 0;
160 friend bool operator== ( const fgFRAGMENT::fgFACE & lhs,
161 const fgFRAGMENT::fgFACE & rhs );
162 friend bool operator== ( const fgFRAGMENT & lhs, const fgFRAGMENT & rhs );
166 operator== ( const fgFRAGMENT::fgFACE& lhs,
167 const fgFRAGMENT::fgFACE& rhs )
169 return (lhs.n1 == rhs.n1) && (lhs.n2 == rhs.n2) && (lhs.n3 == rhs.n3);
173 operator == ( const fgFRAGMENT & lhs, const fgFRAGMENT & rhs ) {
174 return lhs.center == rhs.center;
178 #endif // _FRAGMENT_HXX
182 // Revision 1.7 1998/11/02 18:29:00 curt
183 // Portability changes for the Borland compiler.
185 // Revision 1.6 1998/10/16 00:54:38 curt
186 // Converted to Point3D class.
188 // Revision 1.5 1998/09/15 01:35:04 curt
189 // cleaned up my fragment.num_faces hack :-) to use the STL (no need in
190 // duplicating work.)
191 // Tweaked fgTileMgrRender() do not calc tile matrix unless necessary.
192 // removed some unneeded stuff from fgTileMgrCurElev()
194 // Revision 1.4 1998/09/10 19:07:09 curt
195 // /Simulator/Objects/fragment.hxx
196 // Nested fgFACE inside fgFRAGMENT since its not used anywhere else.
198 // ./Simulator/Objects/material.cxx
199 // ./Simulator/Objects/material.hxx
200 // Made fgMATERIAL and fgMATERIAL_MGR bona fide classes with private
201 // data members - that should keep the rabble happy :)
203 // ./Simulator/Scenery/tilemgr.cxx
204 // In viewable() delay evaluation of eye[0] and eye[1] in until they're
206 // Change to fgTileMgrRender() to call fgMATERIAL_MGR::render_fragments()
209 // ./Include/fg_stl_config.h
210 // ./Include/auto_ptr.hxx
211 // Added support for g++ 2.7.
212 // Further changes to other files are forthcoming.
214 // Brief summary of changes required for g++ 2.7.
215 // operator->() not supported by iterators: use (*i).x instead of i->x
216 // default template arguments not supported,
217 // <functional> doesn't have mem_fun_ref() needed by callbacks.
218 // some std include files have different names.
219 // template member functions not supported.
221 // Revision 1.3 1998/09/08 21:40:44 curt
222 // Updates from Bernie Bright.
224 // Revision 1.2 1998/09/01 19:03:08 curt
225 // Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
226 // - The new classes in libmisc.tgz define a stream interface into zlib.
227 // I've put these in a new directory, Lib/Misc. Feel free to rename it
228 // to something more appropriate. However you'll have to change the
229 // include directives in all the other files. Additionally you'll have
230 // add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
232 // The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
233 // test so I've included the required changes in config.tgz.
235 // There are a fair few changes to Simulator/Objects as I've moved
236 // things around. Loading tiles is quicker but thats not where the delay
237 // is. Tile loading takes a few tenths of a second per file on a P200
238 // but it seems to be the post-processing that leads to a noticeable
239 // blip in framerate. I suppose its time to start profiling to see where
242 // I've included a brief description of each archives contents.
247 // C++ stream interface into zlib.
248 // Taken from zlib-1.1.3/contrib/iostream/.
249 // Minor mods for STL compatibility.
250 // There's no copyright associated with these so I assume they're
251 // covered by zlib's.
255 // FlightGear input stream using gz_ifstream. Tries to open the
256 // given filename. If that fails then filename is examined and a
257 // ".gz" suffix is removed or appended and that file is opened.
260 // A simple timer for benchmarking. Not used in production code.
261 // Taken from the Blitz++ project. Covered by GPL.
265 // Some simple string manipulation routines.
267 // Simulator/Airports/
268 // Load airports database using fgstream.
269 // Changed fgAIRPORTS to use set<> instead of map<>.
270 // Added bool fgAIRPORTS::search() as a neater way doing the lookup.
271 // Returns true if found.
274 // Modified fgStarsInit() to load stars database using fgstream.
276 // Simulator/Objects/
277 // Modified fgObjLoad() to use fgstream.
278 // Modified fgMATERIAL_MGR::load_lib() to use fgstream.
279 // Many changes to fgMATERIAL.
280 // Some changes to fgFRAGMENT but I forget what!
282 // Revision 1.1 1998/08/25 16:51:23 curt
283 // Moved from ../Scenery