1 // material.cxx -- 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)
36 #include <Include/compiler.h>
41 #include <Debug/logstream.hxx>
42 #include <Misc/fgstream.hxx>
43 #include <Main/options.hxx>
44 #include <Main/views.hxx>
45 #include <Scenery/tile.hxx>
47 #include "material.hxx"
48 #include "fragment.hxx"
52 #ifdef FG_HAVE_NATIVE_SGI_COMPILERS
53 FG_USING_NAMESPACE(std);
58 // global material management class
59 fgMATERIAL_MGR material_mgr;
63 fgMATERIAL::fgMATERIAL ( void )
68 ambient[0] = ambient[1] = ambient[2] = ambient[3] = 0.0;
69 diffuse[0] = diffuse[1] = diffuse[2] = diffuse[3] = 0.0;
70 specular[0] = specular[1] = specular[2] = specular[3] = 0.0;
71 emissive[0] = emissive[1] = emissive[2] = emissive[3] = 0.0;
76 fgMATERIAL::append_sort_list( fgFRAGMENT *object )
78 if ( list_size < FG_MAX_MATERIAL_FRAGS ) {
79 list[ list_size++ ] = object;
88 operator >> ( istream& in, fgMATERIAL& m )
94 if ( token == "texture" )
96 in >> token >> m.texture_name;
98 else if ( token == "ambient" )
100 in >> token >> m.ambient[0] >> m.ambient[1]
101 >> m.ambient[2] >> m.ambient[3];
103 else if ( token == "diffuse" )
105 in >> token >> m.diffuse[0] >> m.diffuse[1]
106 >> m.diffuse[2] >> m.diffuse[3];
108 else if ( token == "specular" )
110 in >> token >> m.specular[0] >> m.specular[1]
111 >> m.specular[2] >> m.specular[3];
113 else if ( token == "emissive" )
115 in >> token >> m.emissive[0] >> m.emissive[1]
116 >> m.emissive[2] >> m.emissive[3];
118 else if ( token == "alpha" )
120 in >> token >> token;
121 if ( token == "yes" )
123 else if ( token == "no" )
127 FG_LOG( FG_TERRAIN, FG_INFO, "Bad alpha value " << token );
130 else if ( token[0] == '}' )
140 fgMATERIAL::load_texture()
145 // create the texture object and bind it
146 #ifdef GL_VERSION_1_1
147 xglGenTextures(1, &texture_id );
148 xglBindTexture(GL_TEXTURE_2D, texture_id );
149 #elif GL_EXT_texture_object
150 xglGenTexturesEXT(1, &texture_id );
151 xglBindTextureEXT(GL_TEXTURE_2D, texture_id );
156 // set the texture parameters for this texture
157 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ) ;
158 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ) ;
159 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
161 // xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
162 // GL_NEAREST_MIPMAP_NEAREST );
163 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
165 /* GL_NEAREST_MIPMAP_LINEAR */
166 GL_LINEAR_MIPMAP_LINEAR ) ;
168 /* load in the texture data */
169 string tpath = current_options.get_fg_root() + "/Textures/" +
170 texture_name + ".rgb";
171 string fg_tpath = tpath + ".gz";
178 read_rgb_texture(tpath.c_str(), &width, &height)) ==
183 read_rgb_texture(fg_tpath.c_str(), &width, &height))
186 FG_LOG( FG_GENERAL, FG_ALERT,
187 "Error in loading texture " << tpath );
192 /* xglTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0,
193 GL_RGB, GL_UNSIGNED_BYTE, texbuf); */
195 gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGB, width, height,
196 GL_RGB, GL_UNSIGNED_BYTE, texbuf );
197 } else if ( alpha == 1 ) {
198 // load rgba (alpha) texture
202 read_alpha_texture(tpath.c_str(), &width, &height))
207 read_alpha_texture(fg_tpath.c_str(), &width, &height))
210 FG_LOG( FG_GENERAL, FG_ALERT,
211 "Error in loading texture " << tpath );
216 xglTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
217 GL_RGBA, GL_UNSIGNED_BYTE, texbuf);
223 fgMATERIAL::~fgMATERIAL ( void ) {
228 fgMATERIAL_MGR::fgMATERIAL_MGR ( void ) {
229 textures_loaded = false;
234 fgMATERIAL::render_fragments()
236 int tris_rendered = current_view.get_tris_rendered();
238 // cout << "rendering " + texture_name + " = " << list_size << "\n";
243 if ( current_options.get_textures() )
245 #ifdef GL_VERSION_1_1
246 xglBindTexture(GL_TEXTURE_2D, texture_id);
247 #elif GL_EXT_texture_object
248 xglBindTextureEXT(GL_TEXTURE_2D, texture_id);
253 xglMaterialfv (GL_FRONT, GL_AMBIENT, ambient);
254 xglMaterialfv (GL_FRONT, GL_DIFFUSE, diffuse);
257 fgTILE* last_tile_ptr = NULL;
258 frag_list_iterator current = list.begin();
259 frag_list_iterator last = list.end();
261 for ( ; current != last; ++current ) {
262 fgFRAGMENT* frag_ptr = *current;
263 tris_rendered += frag_ptr->num_faces();
264 if ( frag_ptr->tile_ptr != last_tile_ptr )
266 // new tile, new translate
267 last_tile_ptr = frag_ptr->tile_ptr;
268 xglLoadMatrixd( frag_ptr->tile_ptr->model_view );
271 // Woohoo!!! We finally get to draw something!
272 // printf(" display_list = %d\n", frag_ptr->display_list);
273 xglCallList( frag_ptr->display_list );
276 current_view.set_tris_rendered( tris_rendered );
280 // Load a library of material properties
282 fgMATERIAL_MGR::load_lib ( void )
284 string material_name;
286 // build the path name to the material db
287 string mpath = current_options.get_fg_root() + "/materials";
288 fg_gzifstream in( mpath );
290 FG_LOG( FG_GENERAL, FG_ALERT, "Cannot open file: " << mpath );
294 while ( ! in.eof() ) {
295 // printf("%s", line);
297 // strip leading white space and comments
300 // set to zero to prevent its value accidently being '{'
301 // after a failed >> operation.
304 in >> material_name >> token;
306 if ( token == '{' ) {
307 FG_LOG( FG_TERRAIN, FG_INFO,
308 " Loading material " << material_name );
312 if ( current_options.get_textures() ) {
316 material_mgr.material_map[material_name] = m;
320 if ( current_options.get_textures() ) {
321 textures_loaded = true;
328 // Initialize the transient list of fragments for each material property
330 fgMATERIAL_MGR::init_transient_material_lists( void )
332 iterator last = end();
333 for ( iterator it = begin(); it != last; ++it )
335 (*it).second.init_sort_list();
341 fgMATERIAL_MGR::find( const string& material, fgMATERIAL*& mtl_ptr )
343 iterator it = material_map.find( material );
346 mtl_ptr = &((*it).second);
355 fgMATERIAL_MGR::~fgMATERIAL_MGR ( void ) {
360 fgMATERIAL_MGR::render_fragments()
362 current_view.set_tris_rendered( 0 );
364 iterator last = end();
365 for ( iterator current = begin(); current != last; ++current )
366 (*current).second.render_fragments();
371 // Revision 1.13 1999/02/26 22:09:58 curt
372 // Added initial support for native SGI compilers.
374 // Revision 1.12 1998/12/09 18:50:30 curt
375 // Converted "class fgVIEW" to "class FGView" and updated to make data
376 // members private and make required accessor functions.
378 // Revision 1.11 1998/11/07 19:07:12 curt
379 // Enable release builds using the --without-logging option to the configure
380 // script. Also a couple log message cleanups, plus some C to C++ comment
383 // Revision 1.10 1998/11/06 21:18:17 curt
384 // Converted to new logstream debugging facility. This allows release
385 // builds with no messages at all (and no performance impact) by using
386 // the -DFG_NDEBUG flag.
388 // Revision 1.9 1998/11/06 14:47:05 curt
389 // Changes to track Bernie's updates to fgstream.
391 // Revision 1.8 1998/10/12 23:49:17 curt
392 // Changes from NHV to make the code more dynamic with fewer hard coded limits.
394 // Revision 1.7 1998/09/17 18:35:52 curt
395 // Tweaks and optimizations by Norman Vine.
397 // Revision 1.6 1998/09/15 01:35:05 curt
398 // cleaned up my fragment.num_faces hack :-) to use the STL (no need in
399 // duplicating work.)
400 // Tweaked fgTileMgrRender() do not calc tile matrix unless necessary.
401 // removed some unneeded stuff from fgTileMgrCurElev()
403 // Revision 1.5 1998/09/10 19:07:11 curt
404 // /Simulator/Objects/fragment.hxx
405 // Nested fgFACE inside fgFRAGMENT since its not used anywhere else.
407 // ./Simulator/Objects/material.cxx
408 // ./Simulator/Objects/material.hxx
409 // Made fgMATERIAL and fgMATERIAL_MGR bona fide classes with private
410 // data members - that should keep the rabble happy :)
412 // ./Simulator/Scenery/tilemgr.cxx
413 // In viewable() delay evaluation of eye[0] and eye[1] in until they're
415 // Change to fgTileMgrRender() to call fgMATERIAL_MGR::render_fragments()
418 // ./Include/fg_stl_config.h
419 // ./Include/auto_ptr.hxx
420 // Added support for g++ 2.7.
421 // Further changes to other files are forthcoming.
423 // Brief summary of changes required for g++ 2.7.
424 // operator->() not supported by iterators: use (*i).x instead of i->x
425 // default template arguments not supported,
426 // <functional> doesn't have mem_fun_ref() needed by callbacks.
427 // some std include files have different names.
428 // template member functions not supported.
430 // Revision 1.4 1998/09/01 19:03:08 curt
431 // Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
432 // - The new classes in libmisc.tgz define a stream interface into zlib.
433 // I've put these in a new directory, Lib/Misc. Feel free to rename it
434 // to something more appropriate. However you'll have to change the
435 // include directives in all the other files. Additionally you'll have
436 // add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
438 // The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
439 // test so I've included the required changes in config.tgz.
441 // There are a fair few changes to Simulator/Objects as I've moved
442 // things around. Loading tiles is quicker but thats not where the delay
443 // is. Tile loading takes a few tenths of a second per file on a P200
444 // but it seems to be the post-processing that leads to a noticeable
445 // blip in framerate. I suppose its time to start profiling to see where
448 // I've included a brief description of each archives contents.
453 // C++ stream interface into zlib.
454 // Taken from zlib-1.1.3/contrib/iostream/.
455 // Minor mods for STL compatibility.
456 // There's no copyright associated with these so I assume they're
457 // covered by zlib's.
461 // FlightGear input stream using gz_ifstream. Tries to open the
462 // given filename. If that fails then filename is examined and a
463 // ".gz" suffix is removed or appended and that file is opened.
466 // A simple timer for benchmarking. Not used in production code.
467 // Taken from the Blitz++ project. Covered by GPL.
471 // Some simple string manipulation routines.
473 // Simulator/Airports/
474 // Load airports database using fgstream.
475 // Changed fgAIRPORTS to use set<> instead of map<>.
476 // Added bool fgAIRPORTS::search() as a neater way doing the lookup.
477 // Returns true if found.
480 // Modified fgStarsInit() to load stars database using fgstream.
482 // Simulator/Objects/
483 // Modified fgObjLoad() to use fgstream.
484 // Modified fgMATERIAL_MGR::load_lib() to use fgstream.
485 // Many changes to fgMATERIAL.
486 // Some changes to fgFRAGMENT but I forget what!
488 // Revision 1.3 1998/08/27 17:02:09 curt
489 // Contributions from Bernie Bright <bbright@c031.aone.net.au>
490 // - use strings for fg_root and airport_id and added methods to return
492 // - inlined all access methods,
493 // - made the parsing functions private methods,
494 // - deleted some unused functions.
495 // - propogated some of these changes out a bit further.
497 // Revision 1.2 1998/08/25 20:53:33 curt
498 // Shuffled $FG_ROOT file layout.
500 // Revision 1.1 1998/08/25 16:51:24 curt
501 // Moved from ../Scenery
503 // Revision 1.13 1998/08/24 20:11:39 curt
506 // Revision 1.12 1998/08/12 21:41:27 curt
507 // Need to negate the test for textures so that textures aren't loaded when
508 // they are disabled rather than visa versa ... :-)
510 // Revision 1.11 1998/08/12 21:13:03 curt
511 // material.cxx: don't load textures if they are disabled
512 // obj.cxx: optimizations from Norman Vine
513 // tile.cxx: minor tweaks
514 // tile.hxx: addition of num_faces
515 // tilemgr.cxx: minor tweaks
517 // Revision 1.10 1998/07/24 21:42:06 curt
518 // material.cxx: whups, double method declaration with no definition.
519 // obj.cxx: tweaks to avoid errors in SGI's CC.
520 // tile.cxx: optimizations by Norman Vine.
521 // tilemgr.cxx: optimizations by Norman Vine.
523 // Revision 1.9 1998/07/13 21:01:57 curt
524 // Wrote access functions for current fgOPTIONS.
526 // Revision 1.8 1998/07/08 14:47:20 curt
527 // Fix GL_MODULATE vs. GL_DECAL problem introduced by splash screen.
528 // polare3d.h renamed to polar3d.hxx
529 // fg{Cartesian,Polar}Point3d consolodated.
530 // Added some initial support for calculating local current ground elevation.
532 // Revision 1.7 1998/07/04 00:54:28 curt
533 // Added automatic mipmap generation.
535 // When rendering fragments, use saved model view matrix from associated tile
536 // rather than recalculating it with push() translate() pop().
538 // Revision 1.6 1998/06/27 16:54:59 curt
539 // Check for GL_VERSION_1_1 or GL_EXT_texture_object to decide whether to use
540 // "EXT" versions of texture management routines.
542 // Revision 1.5 1998/06/17 21:36:39 curt
543 // Load and manage multiple textures defined in the Materials library.
544 // Boost max material fagments for each material property to 800.
545 // Multiple texture support when rendering.
547 // Revision 1.4 1998/06/12 00:58:04 curt
548 // Build only static libraries.
549 // Declare memmove/memset for Sloaris.
551 // Revision 1.3 1998/06/05 22:39:53 curt
552 // Working on sorting by, and rendering by material properties.
554 // Revision 1.2 1998/06/01 17:56:20 curt
555 // Incremental additions to material.cxx (not fully functional)
556 // Tweaked vfc_ratio math to avoid divide by zero.
558 // Revision 1.1 1998/05/30 01:56:45 curt
559 // Added material.cxx material.hxx