1 // material.hxx -- class to handle material properties
3 // Written by Curtis Olson, started May 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);
49 #include <string> // Standard C++ string library
50 #include <map> // STL associative "array"
52 #ifdef NEEDNAMESPACESTD
60 #define FG_MAX_MATERIAL_FRAGS 800
63 // Material property class
67 // OpenGL texture name
70 // file name of texture
76 // material properties
77 GLfloat ambient[4], diffuse[4], specular[4], emissive[4];
80 // transient list of objects with this material type (used for sorting
81 // by material to reduce GL state changes when rendering the scene
82 fgFRAGMENT * list[FG_MAX_MATERIAL_FRAGS];
90 size_t size() const { return list_size; }
91 bool empty() const { return list_size == 0; }
94 void init_sort_list( void ) {
98 int append_sort_list( fgFRAGMENT *object );
100 void render_fragments();
105 ~fgMATERIAL ( void );
107 friend istream& operator >> ( istream& in, fgMATERIAL& m );
110 istream& operator >> ( istream& in, fgMATERIAL& m );
112 // Material management class
113 class fgMATERIAL_MGR {
117 // associative array of materials
118 typedef map < string, fgMATERIAL, less<string> > container;
119 typedef container::iterator iterator;
120 typedef container::const_iterator const_iterator;
122 iterator begin() { return material_map.begin(); }
123 const_iterator begin() const { return material_map.begin(); }
125 iterator end() { return material_map.end(); }
126 const_iterator end() const { return material_map.end(); }
129 fgMATERIAL_MGR ( void );
131 // Load a library of material properties
132 int load_lib ( void );
134 bool get_textures_loaded() { return textures_loaded; }
136 // Initialize the transient list of fragments for each material property
137 void init_transient_material_lists( void );
139 bool find( const string& material, fgMATERIAL*& mtl_ptr );
141 void render_fragments();
144 ~fgMATERIAL_MGR ( void );
148 // Have textures been loaded
149 bool textures_loaded;
151 container material_map;
155 // global material management class
156 extern fgMATERIAL_MGR material_mgr;
159 #endif // _MATERIAL_HXX
163 // Revision 1.4 1998/09/17 18:35:53 curt
164 // Tweaks and optimizations by Norman Vine.
166 // Revision 1.3 1998/09/10 19:07:12 curt
167 // /Simulator/Objects/fragment.hxx
168 // Nested fgFACE inside fgFRAGMENT since its not used anywhere else.
170 // ./Simulator/Objects/material.cxx
171 // ./Simulator/Objects/material.hxx
172 // Made fgMATERIAL and fgMATERIAL_MGR bona fide classes with private
173 // data members - that should keep the rabble happy :)
175 // ./Simulator/Scenery/tilemgr.cxx
176 // In viewable() delay evaluation of eye[0] and eye[1] in until they're
178 // Change to fgTileMgrRender() to call fgMATERIAL_MGR::render_fragments()
181 // ./Include/fg_stl_config.h
182 // ./Include/auto_ptr.hxx
183 // Added support for g++ 2.7.
184 // Further changes to other files are forthcoming.
186 // Brief summary of changes required for g++ 2.7.
187 // operator->() not supported by iterators: use (*i).x instead of i->x
188 // default template arguments not supported,
189 // <functional> doesn't have mem_fun_ref() needed by callbacks.
190 // some std include files have different names.
191 // template member functions not supported.
193 // Revision 1.2 1998/09/01 19:03:09 curt
194 // Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
195 // - The new classes in libmisc.tgz define a stream interface into zlib.
196 // I've put these in a new directory, Lib/Misc. Feel free to rename it
197 // to something more appropriate. However you'll have to change the
198 // include directives in all the other files. Additionally you'll have
199 // add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
201 // The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
202 // test so I've included the required changes in config.tgz.
204 // There are a fair few changes to Simulator/Objects as I've moved
205 // things around. Loading tiles is quicker but thats not where the delay
206 // is. Tile loading takes a few tenths of a second per file on a P200
207 // but it seems to be the post-processing that leads to a noticeable
208 // blip in framerate. I suppose its time to start profiling to see where
211 // I've included a brief description of each archives contents.
216 // C++ stream interface into zlib.
217 // Taken from zlib-1.1.3/contrib/iostream/.
218 // Minor mods for STL compatibility.
219 // There's no copyright associated with these so I assume they're
220 // covered by zlib's.
224 // FlightGear input stream using gz_ifstream. Tries to open the
225 // given filename. If that fails then filename is examined and a
226 // ".gz" suffix is removed or appended and that file is opened.
229 // A simple timer for benchmarking. Not used in production code.
230 // Taken from the Blitz++ project. Covered by GPL.
234 // Some simple string manipulation routines.
236 // Simulator/Airports/
237 // Load airports database using fgstream.
238 // Changed fgAIRPORTS to use set<> instead of map<>.
239 // Added bool fgAIRPORTS::search() as a neater way doing the lookup.
240 // Returns true if found.
243 // Modified fgStarsInit() to load stars database using fgstream.
245 // Simulator/Objects/
246 // Modified fgObjLoad() to use fgstream.
247 // Modified fgMATERIAL_MGR::load_lib() to use fgstream.
248 // Many changes to fgMATERIAL.
249 // Some changes to fgFRAGMENT but I forget what!
251 // Revision 1.1 1998/08/25 16:51:24 curt
252 // Moved from ../Scenery
254 // Revision 1.10 1998/07/24 21:42:06 curt
255 // material.cxx: whups, double method declaration with no definition.
256 // obj.cxx: tweaks to avoid errors in SGI's CC.
257 // tile.cxx: optimizations by Norman Vine.
258 // tilemgr.cxx: optimizations by Norman Vine.
260 // Revision 1.9 1998/07/06 21:34:33 curt
261 // Added using namespace std for compilers that support this.
263 // Revision 1.8 1998/06/17 21:36:39 curt
264 // Load and manage multiple textures defined in the Materials library.
265 // Boost max material fagments for each material property to 800.
266 // Multiple texture support when rendering.
268 // Revision 1.7 1998/06/12 00:58:04 curt
269 // Build only static libraries.
270 // Declare memmove/memset for Sloaris.
272 // Revision 1.6 1998/06/06 01:09:31 curt
273 // I goofed on the log message in the last commit ... now fixed.
275 // Revision 1.5 1998/06/06 01:07:17 curt
276 // Increased per material fragment list size from 100 to 400.
277 // Now correctly draw viewable fragments in per material order.
279 // Revision 1.4 1998/06/05 22:39:53 curt
280 // Working on sorting by, and rendering by material properties.
282 // Revision 1.3 1998/06/03 00:47:50 curt
283 // No .h for STL includes.
284 // Minor view culling optimizations.
286 // Revision 1.2 1998/06/01 17:56:20 curt
287 // Incremental additions to material.cxx (not fully functional)
288 // Tweaked vfc_ratio math to avoid divide by zero.
290 // Revision 1.1 1998/05/30 01:56:45 curt
291 // Added material.cxx material.hxx