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)
39 #include "Include/fg_stl_config.h"
40 #include <Debug/fg_debug.h>
41 #include <Main/options.hxx>
42 #include <Misc/fgstream.hxx>
43 #include <Main/views.hxx>
44 #include <Scenery/tile.hxx>
46 #include "material.hxx"
47 #include "fragment.hxx"
51 // global material management class
52 fgMATERIAL_MGR material_mgr;
56 fgMATERIAL::fgMATERIAL ( void )
61 ambient[0] = ambient[1] = ambient[2] = ambient[3] = 0.0;
62 diffuse[0] = diffuse[1] = diffuse[2] = diffuse[3] = 0.0;
63 specular[0] = specular[1] = specular[2] = specular[3] = 0.0;
64 emissive[0] = emissive[1] = emissive[2] = emissive[3] = 0.0;
69 fgMATERIAL::append_sort_list( fgFRAGMENT *object )
71 if ( list_size < FG_MAX_MATERIAL_FRAGS ) {
72 list[ list_size++ ] = object;
81 operator >> ( istream& in, fgMATERIAL& m )
87 if ( token == "texture" )
89 in >> token >> m.texture_name;
91 else if ( token == "ambient" )
93 in >> token >> m.ambient[0] >> m.ambient[1]
94 >> m.ambient[2] >> m.ambient[3];
96 else if ( token == "diffuse" )
98 in >> token >> m.diffuse[0] >> m.diffuse[1]
99 >> m.diffuse[2] >> m.diffuse[3];
101 else if ( token == "specular" )
103 in >> token >> m.specular[0] >> m.specular[1]
104 >> m.specular[2] >> m.specular[3];
106 else if ( token == "emissive" )
108 in >> token >> m.emissive[0] >> m.emissive[1]
109 >> m.emissive[2] >> m.emissive[3];
111 else if ( token == "alpha" )
113 in >> token >> token;
114 if ( token == "yes" )
116 else if ( token == "no" )
120 fgPrintf( FG_TERRAIN, FG_INFO,
121 "Bad alpha value '%s'\n", token.c_str() );
124 else if ( token[0] == '}' )
134 fgMATERIAL::load_texture()
139 // create the texture object and bind it
140 #ifdef GL_VERSION_1_1
141 xglGenTextures(1, &texture_id );
142 xglBindTexture(GL_TEXTURE_2D, texture_id );
143 #elif GL_EXT_texture_object
144 xglGenTexturesEXT(1, &texture_id );
145 xglBindTextureEXT(GL_TEXTURE_2D, texture_id );
150 // set the texture parameters for this texture
151 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ) ;
152 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ) ;
153 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
155 // xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
156 // GL_NEAREST_MIPMAP_NEAREST );
157 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
159 /* GL_NEAREST_MIPMAP_LINEAR */
160 GL_LINEAR_MIPMAP_LINEAR ) ;
162 /* load in the texture data */
163 string tpath = current_options.get_fg_root() + "/Textures/" +
164 texture_name + ".rgb";
165 string fg_tpath = tpath + ".gz";
172 read_rgb_texture(tpath.c_str(), &width, &height)) ==
177 read_rgb_texture(fg_tpath.c_str(), &width, &height))
180 fgPrintf( FG_GENERAL, FG_EXIT,
181 "Error in loading texture %s\n",
187 /* xglTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0,
188 GL_RGB, GL_UNSIGNED_BYTE, texbuf); */
190 gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGB, width, height,
191 GL_RGB, GL_UNSIGNED_BYTE, texbuf );
192 } else if ( alpha == 1 ) {
193 // load rgba (alpha) texture
197 read_alpha_texture(tpath.c_str(), &width, &height))
202 read_alpha_texture(fg_tpath.c_str(), &width, &height))
205 fgPrintf( FG_GENERAL, FG_EXIT,
206 "Error in loading texture %s\n",
212 xglTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
213 GL_RGBA, GL_UNSIGNED_BYTE, texbuf);
219 fgMATERIAL::~fgMATERIAL ( void ) {
224 fgMATERIAL_MGR::fgMATERIAL_MGR ( void ) {
225 textures_loaded = false;
230 fgMATERIAL::render_fragments()
232 // cout << "rendering " + texture_name + " = " << list_size << "\n";
237 if ( current_options.get_textures() )
239 #ifdef GL_VERSION_1_1
240 xglBindTexture(GL_TEXTURE_2D, texture_id);
241 #elif GL_EXT_texture_object
242 xglBindTextureEXT(GL_TEXTURE_2D, texture_id);
247 xglMaterialfv (GL_FRONT, GL_AMBIENT, ambient);
248 xglMaterialfv (GL_FRONT, GL_DIFFUSE, diffuse);
251 fgTILE* last_tile_ptr = NULL;
252 frag_list_iterator current = list.begin();
253 frag_list_iterator last = list.end();
255 for ( ; current != last; ++current ) {
256 fgFRAGMENT* frag_ptr = *current;
257 current_view.tris_rendered += frag_ptr->num_faces();
258 if ( frag_ptr->tile_ptr != last_tile_ptr )
260 // new tile, new translate
261 last_tile_ptr = frag_ptr->tile_ptr;
262 xglLoadMatrixd( frag_ptr->tile_ptr->model_view );
265 // Woohoo!!! We finally get to draw something!
266 // printf(" display_list = %d\n", frag_ptr->display_list);
267 xglCallList( frag_ptr->display_list );
272 // Load a library of material properties
274 fgMATERIAL_MGR::load_lib ( void )
276 string material_name;
278 // build the path name to the material db
279 string mpath = current_options.get_fg_root() + "/materials";
280 fg_gzifstream in( mpath );
282 fgPrintf( FG_GENERAL, FG_EXIT, "Cannot open file: %s\n",
285 while ( ! in.eof() ) {
286 // printf("%s", line);
288 // strip leading white space and comments
291 // set to zero to prevent its value accidently being '{'
292 // after a failed >> operation.
295 in.stream() >> material_name >> token;
297 if ( token == '{' ) {
298 printf( " Loading material %s\n", material_name.c_str() );
302 if ( current_options.get_textures() ) {
306 material_mgr.material_map[material_name] = m;
310 if ( current_options.get_textures() ) {
311 textures_loaded = true;
318 // Initialize the transient list of fragments for each material property
320 fgMATERIAL_MGR::init_transient_material_lists( void )
322 iterator last = end();
323 for ( iterator it = begin(); it != last; ++it )
325 (*it).second.init_sort_list();
331 fgMATERIAL_MGR::find( const string& material, fgMATERIAL*& mtl_ptr )
333 iterator it = material_map.find( material );
336 mtl_ptr = &((*it).second);
345 fgMATERIAL_MGR::~fgMATERIAL_MGR ( void ) {
350 fgMATERIAL_MGR::render_fragments()
352 current_view.tris_rendered = 0;
353 iterator last = end();
354 for ( iterator current = begin(); current != last; ++current )
355 (*current).second.render_fragments();
360 // Revision 1.8 1998/10/12 23:49:17 curt
361 // Changes from NHV to make the code more dynamic with fewer hard coded limits.
363 // Revision 1.7 1998/09/17 18:35:52 curt
364 // Tweaks and optimizations by Norman Vine.
366 // Revision 1.6 1998/09/15 01:35:05 curt
367 // cleaned up my fragment.num_faces hack :-) to use the STL (no need in
368 // duplicating work.)
369 // Tweaked fgTileMgrRender() do not calc tile matrix unless necessary.
370 // removed some unneeded stuff from fgTileMgrCurElev()
372 // Revision 1.5 1998/09/10 19:07:11 curt
373 // /Simulator/Objects/fragment.hxx
374 // Nested fgFACE inside fgFRAGMENT since its not used anywhere else.
376 // ./Simulator/Objects/material.cxx
377 // ./Simulator/Objects/material.hxx
378 // Made fgMATERIAL and fgMATERIAL_MGR bona fide classes with private
379 // data members - that should keep the rabble happy :)
381 // ./Simulator/Scenery/tilemgr.cxx
382 // In viewable() delay evaluation of eye[0] and eye[1] in until they're
384 // Change to fgTileMgrRender() to call fgMATERIAL_MGR::render_fragments()
387 // ./Include/fg_stl_config.h
388 // ./Include/auto_ptr.hxx
389 // Added support for g++ 2.7.
390 // Further changes to other files are forthcoming.
392 // Brief summary of changes required for g++ 2.7.
393 // operator->() not supported by iterators: use (*i).x instead of i->x
394 // default template arguments not supported,
395 // <functional> doesn't have mem_fun_ref() needed by callbacks.
396 // some std include files have different names.
397 // template member functions not supported.
399 // Revision 1.4 1998/09/01 19:03:08 curt
400 // Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
401 // - The new classes in libmisc.tgz define a stream interface into zlib.
402 // I've put these in a new directory, Lib/Misc. Feel free to rename it
403 // to something more appropriate. However you'll have to change the
404 // include directives in all the other files. Additionally you'll have
405 // add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
407 // The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
408 // test so I've included the required changes in config.tgz.
410 // There are a fair few changes to Simulator/Objects as I've moved
411 // things around. Loading tiles is quicker but thats not where the delay
412 // is. Tile loading takes a few tenths of a second per file on a P200
413 // but it seems to be the post-processing that leads to a noticeable
414 // blip in framerate. I suppose its time to start profiling to see where
417 // I've included a brief description of each archives contents.
422 // C++ stream interface into zlib.
423 // Taken from zlib-1.1.3/contrib/iostream/.
424 // Minor mods for STL compatibility.
425 // There's no copyright associated with these so I assume they're
426 // covered by zlib's.
430 // FlightGear input stream using gz_ifstream. Tries to open the
431 // given filename. If that fails then filename is examined and a
432 // ".gz" suffix is removed or appended and that file is opened.
435 // A simple timer for benchmarking. Not used in production code.
436 // Taken from the Blitz++ project. Covered by GPL.
440 // Some simple string manipulation routines.
442 // Simulator/Airports/
443 // Load airports database using fgstream.
444 // Changed fgAIRPORTS to use set<> instead of map<>.
445 // Added bool fgAIRPORTS::search() as a neater way doing the lookup.
446 // Returns true if found.
449 // Modified fgStarsInit() to load stars database using fgstream.
451 // Simulator/Objects/
452 // Modified fgObjLoad() to use fgstream.
453 // Modified fgMATERIAL_MGR::load_lib() to use fgstream.
454 // Many changes to fgMATERIAL.
455 // Some changes to fgFRAGMENT but I forget what!
457 // Revision 1.3 1998/08/27 17:02:09 curt
458 // Contributions from Bernie Bright <bbright@c031.aone.net.au>
459 // - use strings for fg_root and airport_id and added methods to return
461 // - inlined all access methods,
462 // - made the parsing functions private methods,
463 // - deleted some unused functions.
464 // - propogated some of these changes out a bit further.
466 // Revision 1.2 1998/08/25 20:53:33 curt
467 // Shuffled $FG_ROOT file layout.
469 // Revision 1.1 1998/08/25 16:51:24 curt
470 // Moved from ../Scenery
472 // Revision 1.13 1998/08/24 20:11:39 curt
475 // Revision 1.12 1998/08/12 21:41:27 curt
476 // Need to negate the test for textures so that textures aren't loaded when
477 // they are disabled rather than visa versa ... :-)
479 // Revision 1.11 1998/08/12 21:13:03 curt
480 // material.cxx: don't load textures if they are disabled
481 // obj.cxx: optimizations from Norman Vine
482 // tile.cxx: minor tweaks
483 // tile.hxx: addition of num_faces
484 // tilemgr.cxx: minor tweaks
486 // Revision 1.10 1998/07/24 21:42:06 curt
487 // material.cxx: whups, double method declaration with no definition.
488 // obj.cxx: tweaks to avoid errors in SGI's CC.
489 // tile.cxx: optimizations by Norman Vine.
490 // tilemgr.cxx: optimizations by Norman Vine.
492 // Revision 1.9 1998/07/13 21:01:57 curt
493 // Wrote access functions for current fgOPTIONS.
495 // Revision 1.8 1998/07/08 14:47:20 curt
496 // Fix GL_MODULATE vs. GL_DECAL problem introduced by splash screen.
497 // polare3d.h renamed to polar3d.hxx
498 // fg{Cartesian,Polar}Point3d consolodated.
499 // Added some initial support for calculating local current ground elevation.
501 // Revision 1.7 1998/07/04 00:54:28 curt
502 // Added automatic mipmap generation.
504 // When rendering fragments, use saved model view matrix from associated tile
505 // rather than recalculating it with push() translate() pop().
507 // Revision 1.6 1998/06/27 16:54:59 curt
508 // Check for GL_VERSION_1_1 or GL_EXT_texture_object to decide whether to use
509 // "EXT" versions of texture management routines.
511 // Revision 1.5 1998/06/17 21:36:39 curt
512 // Load and manage multiple textures defined in the Materials library.
513 // Boost max material fagments for each material property to 800.
514 // Multiple texture support when rendering.
516 // Revision 1.4 1998/06/12 00:58:04 curt
517 // Build only static libraries.
518 // Declare memmove/memset for Sloaris.
520 // Revision 1.3 1998/06/05 22:39:53 curt
521 // Working on sorting by, and rendering by material properties.
523 // Revision 1.2 1998/06/01 17:56:20 curt
524 // Incremental additions to material.cxx (not fully functional)
525 // Tweaked vfc_ratio math to avoid divide by zero.
527 // Revision 1.1 1998/05/30 01:56:45 curt
528 // Added material.cxx material.hxx