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++
44 #if defined ( __sun__ )
45 extern "C" void *memmove(void *, const void *, size_t);
46 extern "C" void *memset(void *, int, size_t);
51 #include <Bucket/bucketutils.h>
52 #include <Include/fg_types.h>
53 #include "Include/fg_constants.h"
54 #include <Math/mat3.h>
56 #ifdef NEEDNAMESPACESTD
61 // Maximum nodes per tile
62 #define MAX_NODES 2000
65 // Forward declarations
69 // Object fragment data class
76 fgFACE( int a = 0, int b =0, int c =0 )
77 : n1(a), n2(b), n3(c) {}
79 fgFACE( const fgFACE & image )
80 : n1(image.n1), n2(image.n2), n3(image.n3) {}
86 // culling data for this object fragment (fine grain culling)
88 double bounding_radius;
90 // variable offset data for this object fragment for this frame
91 // fgCartesianPoint3d tile_offset;
93 // saved transformation matrix for this fragment (used by renderer)
94 // GLfloat matrix[16];
96 // tile_ptr & material_ptr are set so that when we traverse the
97 // list of fragments we can quickly reference back the tile or
98 // material property this fragment is assigned to.
100 // material property pointer
101 fgMATERIAL *material_ptr;
106 // OpenGL display list for fragment data
109 // face list (this indexes into the master tile vertex list)
110 typedef vector < fgFACE > container;
111 typedef container::iterator iterator;
112 typedef container::const_iterator const_iterator;
116 // number of faces in this fragment
121 // Add a face to the face list
122 void add_face(int n1, int n2, int n3) {
123 faces.push_back( fgFACE(n1,n2,n3) );
126 // test if line intesects with this fragment. p0 and p1 are the
127 // two line end points of the line. If side_flag is true, check
128 // to see that end points are on opposite sides of face. Returns
129 // 1 if it intersection found, 0 otherwise. If it intesects,
130 // result is the point of intersection
131 int intersect( const fgPoint3d *end0,
132 const fgPoint3d *end1,
134 fgPoint3d *result) const;
137 fgFRAGMENT () { /*faces.reserve(512);*/}
138 fgFRAGMENT ( const fgFRAGMENT &image );
141 ~fgFRAGMENT() { faces.erase( faces.begin(), faces.end() ); }
144 fgFRAGMENT & operator = ( const fgFRAGMENT & rhs );
146 bool operator < ( const fgFRAGMENT & rhs ) const {
147 // This is completely arbitrary. It satisfies RW's STL implementation
148 return bounding_radius < rhs.bounding_radius;
152 faces.erase( faces.begin(), faces.end() );
155 int deleteDisplayList() {
156 xglDeleteLists( display_list, 1 ); return 0;
161 operator == ( const fgFRAGMENT::fgFACE& lhs,
162 const fgFRAGMENT::fgFACE& rhs )
164 return (lhs.n1 == rhs.n1) && (lhs.n2 == rhs.n2) && (lhs.n3 == rhs.n3);
168 operator == ( const fgFRAGMENT & lhs, const fgFRAGMENT & rhs ) {
169 return (( lhs.center.x - rhs.center.x ) < FG_EPSILON &&
170 ( lhs.center.y - rhs.center.y ) < FG_EPSILON &&
171 ( lhs.center.z - rhs.center.z ) < FG_EPSILON );
175 #endif // _FRAGMENT_HXX
179 // Revision 1.5 1998/09/15 01:35:04 curt
180 // cleaned up my fragment.num_faces hack :-) to use the STL (no need in
181 // duplicating work.)
182 // Tweaked fgTileMgrRender() do not calc tile matrix unless necessary.
183 // removed some unneeded stuff from fgTileMgrCurElev()
185 // Revision 1.4 1998/09/10 19:07:09 curt
186 // /Simulator/Objects/fragment.hxx
187 // Nested fgFACE inside fgFRAGMENT since its not used anywhere else.
189 // ./Simulator/Objects/material.cxx
190 // ./Simulator/Objects/material.hxx
191 // Made fgMATERIAL and fgMATERIAL_MGR bona fide classes with private
192 // data members - that should keep the rabble happy :)
194 // ./Simulator/Scenery/tilemgr.cxx
195 // In viewable() delay evaluation of eye[0] and eye[1] in until they're
197 // Change to fgTileMgrRender() to call fgMATERIAL_MGR::render_fragments()
200 // ./Include/fg_stl_config.h
201 // ./Include/auto_ptr.hxx
202 // Added support for g++ 2.7.
203 // Further changes to other files are forthcoming.
205 // Brief summary of changes required for g++ 2.7.
206 // operator->() not supported by iterators: use (*i).x instead of i->x
207 // default template arguments not supported,
208 // <functional> doesn't have mem_fun_ref() needed by callbacks.
209 // some std include files have different names.
210 // template member functions not supported.
212 // Revision 1.3 1998/09/08 21:40:44 curt
213 // Updates from Bernie Bright.
215 // Revision 1.2 1998/09/01 19:03:08 curt
216 // Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
217 // - The new classes in libmisc.tgz define a stream interface into zlib.
218 // I've put these in a new directory, Lib/Misc. Feel free to rename it
219 // to something more appropriate. However you'll have to change the
220 // include directives in all the other files. Additionally you'll have
221 // add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
223 // The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
224 // test so I've included the required changes in config.tgz.
226 // There are a fair few changes to Simulator/Objects as I've moved
227 // things around. Loading tiles is quicker but thats not where the delay
228 // is. Tile loading takes a few tenths of a second per file on a P200
229 // but it seems to be the post-processing that leads to a noticeable
230 // blip in framerate. I suppose its time to start profiling to see where
233 // I've included a brief description of each archives contents.
238 // C++ stream interface into zlib.
239 // Taken from zlib-1.1.3/contrib/iostream/.
240 // Minor mods for STL compatibility.
241 // There's no copyright associated with these so I assume they're
242 // covered by zlib's.
246 // FlightGear input stream using gz_ifstream. Tries to open the
247 // given filename. If that fails then filename is examined and a
248 // ".gz" suffix is removed or appended and that file is opened.
251 // A simple timer for benchmarking. Not used in production code.
252 // Taken from the Blitz++ project. Covered by GPL.
256 // Some simple string manipulation routines.
258 // Simulator/Airports/
259 // Load airports database using fgstream.
260 // Changed fgAIRPORTS to use set<> instead of map<>.
261 // Added bool fgAIRPORTS::search() as a neater way doing the lookup.
262 // Returns true if found.
265 // Modified fgStarsInit() to load stars database using fgstream.
267 // Simulator/Objects/
268 // Modified fgObjLoad() to use fgstream.
269 // Modified fgMATERIAL_MGR::load_lib() to use fgstream.
270 // Many changes to fgMATERIAL.
271 // Some changes to fgFRAGMENT but I forget what!
273 // Revision 1.1 1998/08/25 16:51:23 curt
274 // Moved from ../Scenery