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)
38 #include "Include/fg_stl_config.h"
39 #include <Debug/fg_debug.h>
40 #include <Main/options.hxx>
41 #include <Misc/fgstream.hxx>
42 #include <Main/views.hxx>
43 #include <Scenery/tile.hxx>
45 #include "material.hxx"
46 #include "fragment.hxx"
50 // global material management class
51 fgMATERIAL_MGR material_mgr;
55 fgMATERIAL::fgMATERIAL ( void )
60 ambient[0] = ambient[1] = ambient[2] = ambient[3] = 0.0;
61 diffuse[0] = diffuse[1] = diffuse[2] = diffuse[3] = 0.0;
62 specular[0] = specular[1] = specular[2] = specular[3] = 0.0;
63 emissive[0] = emissive[1] = emissive[2] = emissive[3] = 0.0;
67 int fgMATERIAL::append_sort_list( fgFRAGMENT *object ) {
68 if ( list_size < FG_MAX_MATERIAL_FRAGS )
70 list[ list_size++ ] = object;
80 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()
136 if ( current_options.get_textures() )
141 // create the texture object and bind it
142 #ifdef GL_VERSION_1_1
143 xglGenTextures(1, &texture_id );
144 xglBindTexture(GL_TEXTURE_2D, texture_id );
145 #elif GL_EXT_texture_object
146 xglGenTexturesEXT(1, &texture_id );
147 xglBindTextureEXT(GL_TEXTURE_2D, texture_id );
152 // set the texture parameters for this texture
153 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT ) ;
154 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT ) ;
155 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
157 // xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
158 // GL_NEAREST_MIPMAP_NEAREST );
159 xglTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
161 /* GL_NEAREST_MIPMAP_LINEAR */
162 GL_LINEAR_MIPMAP_LINEAR ) ;
164 /* load in the texture data */
165 string tpath = current_options.get_fg_root() + "/Textures/" +
166 texture_name + ".rgb";
167 string fg_tpath = tpath + ".gz";
174 read_rgb_texture(tpath.c_str(), &width, &height)) ==
179 read_rgb_texture(fg_tpath.c_str(), &width, &height))
182 fgPrintf( FG_GENERAL, FG_EXIT,
183 "Error in loading texture %s\n",
189 /* xglTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0,
190 GL_RGB, GL_UNSIGNED_BYTE, texbuf); */
192 gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGB, width, height,
193 GL_RGB, GL_UNSIGNED_BYTE, texbuf );
194 } else if ( alpha == 1 ) {
195 // load rgba (alpha) texture
199 read_alpha_texture(tpath.c_str(), &width, &height))
204 read_alpha_texture(fg_tpath.c_str(), &width, &height))
207 fgPrintf( FG_GENERAL, FG_EXIT,
208 "Error in loading texture %s\n",
214 xglTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
215 GL_RGBA, GL_UNSIGNED_BYTE, texbuf);
222 fgMATERIAL::~fgMATERIAL ( void ) {
227 fgMATERIAL_MGR::fgMATERIAL_MGR ( void ) {
232 fgMATERIAL::render_fragments()
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 for ( size_t i = 0; i < list_size; ++i )
254 fgFRAGMENT* frag_ptr = list[i];
255 current_view.tris_rendered += frag_ptr->num_faces;
256 if ( frag_ptr->tile_ptr != last_tile_ptr )
258 // new tile, new translate
259 xglLoadMatrixd( frag_ptr->tile_ptr->model_view );
262 // Woohoo!!! We finally get to draw something!
263 // printf(" display_list = %d\n", frag_ptr->display_list);
264 xglCallList( frag_ptr->display_list );
265 last_tile_ptr = frag_ptr->tile_ptr;
270 // Load a library of material properties
271 int fgMATERIAL_MGR::load_lib ( void ) {
272 string material_name;
274 // build the path name to the material db
275 string mpath = current_options.get_fg_root() + "/materials";
276 fg_gzifstream in( mpath );
278 fgPrintf( FG_GENERAL, FG_EXIT, "Cannot open file: %s\n",
281 while ( ! in.eof() ) {
282 // printf("%s", line);
284 // strip leading white space and comments
287 // set to zero to prevent its value accidently being '{'
288 // after a failed >> operation.
291 in.stream() >> material_name >> token;
293 if ( token == '{' ) {
294 printf( " Loading material %s\n", material_name.c_str() );
298 material_mgr.material_map[material_name] = m;
302 // iterator last = end();
303 // for ( iterator it = begin(); it != last; ++it )
305 // (*it).second.load_texture();
312 // Initialize the transient list of fragments for each material property
313 void fgMATERIAL_MGR::init_transient_material_lists( void ) {
314 iterator last = end();
315 for ( iterator it = begin(); it != last; ++it )
317 (*it).second.init_sort_list();
322 fgMATERIAL_MGR::find( const string& material, fgMATERIAL*& mtl_ptr )
324 iterator it = material_map.find( material );
327 mtl_ptr = &((*it).second);
336 fgMATERIAL_MGR::~fgMATERIAL_MGR ( void ) {
341 fgMATERIAL_MGR::render_fragments()
343 current_view.tris_rendered = 0;
344 iterator last = end();
345 for ( iterator current = begin(); current != last; ++current )
346 (*current).second.render_fragments();
351 // Revision 1.5 1998/09/10 19:07:11 curt
352 // /Simulator/Objects/fragment.hxx
353 // Nested fgFACE inside fgFRAGMENT since its not used anywhere else.
355 // ./Simulator/Objects/material.cxx
356 // ./Simulator/Objects/material.hxx
357 // Made fgMATERIAL and fgMATERIAL_MGR bona fide classes with private
358 // data members - that should keep the rabble happy :)
360 // ./Simulator/Scenery/tilemgr.cxx
361 // In viewable() delay evaluation of eye[0] and eye[1] in until they're
363 // Change to fgTileMgrRender() to call fgMATERIAL_MGR::render_fragments()
366 // ./Include/fg_stl_config.h
367 // ./Include/auto_ptr.hxx
368 // Added support for g++ 2.7.
369 // Further changes to other files are forthcoming.
371 // Brief summary of changes required for g++ 2.7.
372 // operator->() not supported by iterators: use (*i).x instead of i->x
373 // default template arguments not supported,
374 // <functional> doesn't have mem_fun_ref() needed by callbacks.
375 // some std include files have different names.
376 // template member functions not supported.
378 // Revision 1.4 1998/09/01 19:03:08 curt
379 // Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
380 // - The new classes in libmisc.tgz define a stream interface into zlib.
381 // I've put these in a new directory, Lib/Misc. Feel free to rename it
382 // to something more appropriate. However you'll have to change the
383 // include directives in all the other files. Additionally you'll have
384 // add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
386 // The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
387 // test so I've included the required changes in config.tgz.
389 // There are a fair few changes to Simulator/Objects as I've moved
390 // things around. Loading tiles is quicker but thats not where the delay
391 // is. Tile loading takes a few tenths of a second per file on a P200
392 // but it seems to be the post-processing that leads to a noticeable
393 // blip in framerate. I suppose its time to start profiling to see where
396 // I've included a brief description of each archives contents.
401 // C++ stream interface into zlib.
402 // Taken from zlib-1.1.3/contrib/iostream/.
403 // Minor mods for STL compatibility.
404 // There's no copyright associated with these so I assume they're
405 // covered by zlib's.
409 // FlightGear input stream using gz_ifstream. Tries to open the
410 // given filename. If that fails then filename is examined and a
411 // ".gz" suffix is removed or appended and that file is opened.
414 // A simple timer for benchmarking. Not used in production code.
415 // Taken from the Blitz++ project. Covered by GPL.
419 // Some simple string manipulation routines.
421 // Simulator/Airports/
422 // Load airports database using fgstream.
423 // Changed fgAIRPORTS to use set<> instead of map<>.
424 // Added bool fgAIRPORTS::search() as a neater way doing the lookup.
425 // Returns true if found.
428 // Modified fgStarsInit() to load stars database using fgstream.
430 // Simulator/Objects/
431 // Modified fgObjLoad() to use fgstream.
432 // Modified fgMATERIAL_MGR::load_lib() to use fgstream.
433 // Many changes to fgMATERIAL.
434 // Some changes to fgFRAGMENT but I forget what!
436 // Revision 1.3 1998/08/27 17:02:09 curt
437 // Contributions from Bernie Bright <bbright@c031.aone.net.au>
438 // - use strings for fg_root and airport_id and added methods to return
440 // - inlined all access methods,
441 // - made the parsing functions private methods,
442 // - deleted some unused functions.
443 // - propogated some of these changes out a bit further.
445 // Revision 1.2 1998/08/25 20:53:33 curt
446 // Shuffled $FG_ROOT file layout.
448 // Revision 1.1 1998/08/25 16:51:24 curt
449 // Moved from ../Scenery
451 // Revision 1.13 1998/08/24 20:11:39 curt
454 // Revision 1.12 1998/08/12 21:41:27 curt
455 // Need to negate the test for textures so that textures aren't loaded when
456 // they are disabled rather than visa versa ... :-)
458 // Revision 1.11 1998/08/12 21:13:03 curt
459 // material.cxx: don't load textures if they are disabled
460 // obj.cxx: optimizations from Norman Vine
461 // tile.cxx: minor tweaks
462 // tile.hxx: addition of num_faces
463 // tilemgr.cxx: minor tweaks
465 // Revision 1.10 1998/07/24 21:42:06 curt
466 // material.cxx: whups, double method declaration with no definition.
467 // obj.cxx: tweaks to avoid errors in SGI's CC.
468 // tile.cxx: optimizations by Norman Vine.
469 // tilemgr.cxx: optimizations by Norman Vine.
471 // Revision 1.9 1998/07/13 21:01:57 curt
472 // Wrote access functions for current fgOPTIONS.
474 // Revision 1.8 1998/07/08 14:47:20 curt
475 // Fix GL_MODULATE vs. GL_DECAL problem introduced by splash screen.
476 // polare3d.h renamed to polar3d.hxx
477 // fg{Cartesian,Polar}Point3d consolodated.
478 // Added some initial support for calculating local current ground elevation.
480 // Revision 1.7 1998/07/04 00:54:28 curt
481 // Added automatic mipmap generation.
483 // When rendering fragments, use saved model view matrix from associated tile
484 // rather than recalculating it with push() translate() pop().
486 // Revision 1.6 1998/06/27 16:54:59 curt
487 // Check for GL_VERSION_1_1 or GL_EXT_texture_object to decide whether to use
488 // "EXT" versions of texture management routines.
490 // Revision 1.5 1998/06/17 21:36:39 curt
491 // Load and manage multiple textures defined in the Materials library.
492 // Boost max material fagments for each material property to 800.
493 // Multiple texture support when rendering.
495 // Revision 1.4 1998/06/12 00:58:04 curt
496 // Build only static libraries.
497 // Declare memmove/memset for Sloaris.
499 // Revision 1.3 1998/06/05 22:39:53 curt
500 // Working on sorting by, and rendering by material properties.
502 // Revision 1.2 1998/06/01 17:56:20 curt
503 // Incremental additions to material.cxx (not fully functional)
504 // Tweaked vfc_ratio math to avoid divide by zero.
506 // Revision 1.1 1998/05/30 01:56:45 curt
507 // Added material.cxx material.hxx