1 // mat.cxx -- class to handle material properties
3 // Written by Curtis Olson, started May 1998.
5 // Copyright (C) 1998 - 2000 Curtis L. Olson - http://www.flightgear.org/~curt
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
25 # include <simgear_config.h>
28 #include <simgear/compiler.h>
36 #ifdef SG_MATH_EXCEPTION_CLASH
40 #include <osg/CullFace>
41 #include <osg/Material>
42 #include <osg/ShadeModel>
44 #include <osg/Texture2D>
45 #include <osgDB/ReadFile>
47 #include <simgear/debug/logstream.hxx>
48 #include <simgear/misc/sg_path.hxx>
49 #include <simgear/misc/sgstream.hxx>
51 #include <simgear/scene/model/model.hxx>
54 static map<string, osg::ref_ptr<osg::Texture2D> > _tex_cache;
57 ////////////////////////////////////////////////////////////////////////
58 // Constructors and destructor.
59 ////////////////////////////////////////////////////////////////////////
62 SGMaterial::SGMaterial( const string &fg_root, const SGPropertyNode *props, const char *season )
65 read_properties( fg_root, props, season );
69 SGMaterial::SGMaterial( const string &texpath )
73 _internal_state st( NULL, texpath, false );
74 _status.push_back( st );
79 SGMaterial::SGMaterial( osg::StateSet *s )
85 SGMaterial::~SGMaterial (void)
91 ////////////////////////////////////////////////////////////////////////
93 ////////////////////////////////////////////////////////////////////////
96 SGMaterial::read_properties( const string &fg_root, const SGPropertyNode * props, const char *season )
98 // Gather the path(s) to the texture(s)
99 vector<SGPropertyNode_ptr> textures = props->getChildren("texture");
100 for (unsigned int i = 0; i < textures.size(); i++)
102 string tname = textures[i]->getStringValue();
103 string otname = tname;
104 if (season && strncmp(season, "summer", 6))
106 if (tname.substr(0,7) == "Terrain")
107 tname.insert(7,"."+string(season));
111 tname = "unknown.rgb";
114 SGPath tpath( fg_root );
115 tpath.append("Textures.high");
117 if ( !ulFileExists(tpath.c_str()) ) {
118 tpath = SGPath( fg_root );
119 tpath.append("Textures");
123 if ( ulFileExists(tpath.c_str()) ) {
124 _internal_state st( NULL, tpath.str(), false );
125 _status.push_back( st );
129 if (textures.size() == 0) {
130 string tname = "unknown.rgb";
131 SGPath tpath( fg_root );
132 tpath.append("Textures");
133 tpath.append("Terrain");
135 _internal_state st( NULL, tpath.str(), true );
136 _status.push_back( st );
139 xsize = props->getDoubleValue("xsize", 0.0);
140 ysize = props->getDoubleValue("ysize", 0.0);
141 wrapu = props->getBoolValue("wrapu", true);
142 wrapv = props->getBoolValue("wrapv", true);
143 mipmap = props->getBoolValue("mipmap", true);
144 light_coverage = props->getDoubleValue("light-coverage", 0.0);
146 // surface values for use with ground reactions
147 solid = props->getBoolValue("solid", true);
148 friction_factor = props->getDoubleValue("friction-factor", 1.0);
149 rolling_friction = props->getDoubleValue("rolling-friction", 0.02);
150 bumpiness = props->getDoubleValue("bumpiness", 0.0);
151 load_resistence = props->getDoubleValue("load-resistence", 1e30);
153 // Taken from default values as used in ac3d
154 ambient[0] = props->getDoubleValue("ambient/r", 0.2);
155 ambient[1] = props->getDoubleValue("ambient/g", 0.2);
156 ambient[2] = props->getDoubleValue("ambient/b", 0.2);
157 ambient[3] = props->getDoubleValue("ambient/a", 1.0);
159 diffuse[0] = props->getDoubleValue("diffuse/r", 0.8);
160 diffuse[1] = props->getDoubleValue("diffuse/g", 0.8);
161 diffuse[2] = props->getDoubleValue("diffuse/b", 0.8);
162 diffuse[3] = props->getDoubleValue("diffuse/a", 1.0);
164 specular[0] = props->getDoubleValue("specular/r", 0.0);
165 specular[1] = props->getDoubleValue("specular/g", 0.0);
166 specular[2] = props->getDoubleValue("specular/b", 0.0);
167 specular[3] = props->getDoubleValue("specular/a", 1.0);
169 emission[0] = props->getDoubleValue("emissive/r", 0.0);
170 emission[1] = props->getDoubleValue("emissive/g", 0.0);
171 emission[2] = props->getDoubleValue("emissive/b", 0.0);
172 emission[3] = props->getDoubleValue("emissive/a", 1.0);
174 shininess = props->getDoubleValue("shininess", 1.0);
176 vector<SGPropertyNode_ptr> object_group_nodes =
177 ((SGPropertyNode *)props)->getChildren("object-group");
178 for (unsigned int i = 0; i < object_group_nodes.size(); i++)
179 object_groups.push_back(new SGMatModelGroup(object_group_nodes[i]));
181 // read glyph table for taxi-/runway-signs
182 vector<SGPropertyNode_ptr> glyph_nodes = props->getChildren("glyph");
183 for (unsigned int i = 0; i < glyph_nodes.size(); i++) {
184 const char *name = glyph_nodes[i]->getStringValue("name");
186 glyphs[name] = new SGMaterialGlyph(glyph_nodes[i]);
192 ////////////////////////////////////////////////////////////////////////
194 ////////////////////////////////////////////////////////////////////////
207 light_coverage = 0.0;
211 rolling_friction = 0.02;
213 load_resistence = 1e30;
216 for (int i = 0; i < 4; i++) {
217 ambient[i] = (i < 3) ? 0.2 : 1.0;
218 specular[i] = (i < 3) ? 0.0 : 1.0;
219 diffuse[i] = (i < 3) ? 0.8 : 1.0;
220 emission[i] = (i < 3) ? 0.0 : 1.0;
225 SGMaterial::load_texture ( int n )
227 int i = (n >= 0) ? n : 0 ;
228 int end = (n >= 0) ? n+1 : _status.size();
232 if ( !_status[i].texture_loaded ) {
233 SG_LOG( SG_GENERAL, SG_INFO, "Loading deferred texture "
234 << _status[i].texture_path );
235 assignTexture(_status[i].state.get(), _status[i].texture_path,
236 wrapu, wrapv, mipmap );
237 _status[i].texture_loaded = true;
244 SGMaterial::get_state (int n) const
246 if (_status.size() == 0) {
247 SG_LOG( SG_GENERAL, SG_WARN, "No state available.");
251 osg::StateSet *st = (n >= 0) ? _status[n].state.get()
252 : _status[_current_ptr].state.get();
254 if (_current_ptr >= _status.size())
262 SGMaterial::build_state( bool defer_tex_load )
264 for (unsigned int i = 0; i < _status.size(); i++)
266 osg::StateSet *stateSet = new osg::StateSet;
268 // Set up the textured state
269 osg::ShadeModel* shadeModel = new osg::ShadeModel;
270 shadeModel->setMode(osg::ShadeModel::SMOOTH);
271 stateSet->setAttributeAndModes(shadeModel, osg::StateAttribute::ON);
273 osg::CullFace* cullFace = new osg::CullFace;
274 cullFace->setMode(osg::CullFace::BACK);
275 stateSet->setAttributeAndModes(cullFace, osg::StateAttribute::ON);
277 stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
279 if ( !defer_tex_load ) {
280 SG_LOG(SG_INPUT, SG_INFO, " " << _status[i].texture_path );
281 assignTexture( stateSet, _status[i].texture_path, wrapu, wrapv );
282 _status[i].texture_loaded = true;
284 _status[i].texture_loaded = false;
287 osg::Material* material = new osg::Material;
288 material->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
289 material->setAmbient(osg::Material::FRONT_AND_BACK, ambient.osg());
290 material->setDiffuse(osg::Material::FRONT_AND_BACK, diffuse.osg());
291 material->setSpecular(osg::Material::FRONT_AND_BACK, specular.osg());
292 material->setEmission(osg::Material::FRONT_AND_BACK, emission.osg());
293 material->setShininess(osg::Material::FRONT_AND_BACK, shininess );
294 stateSet->setAttribute(material);
296 if (ambient[3] < 1 || diffuse[3] < 1 ||
297 specular[3] < 1 || emission[3] < 1) {
298 stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
299 stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
301 stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
302 stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
305 _status[i].state = stateSet;
310 void SGMaterial::set_state( osg::StateSet *s )
312 _status.push_back( _internal_state( s, "", true ) );
315 void SGMaterial::assignTexture( osg::StateSet *state, const std::string &fname,
316 int _wrapu, int _wrapv, int _mipmap )
318 map<string, osg::ref_ptr<osg::Texture2D> >::iterator _tex_cache_iter;
319 _tex_cache_iter = _tex_cache.find(fname);
320 if (_tex_cache_iter == _tex_cache.end())
322 osg::Texture2D* texture = SGLoadTexture2D(fname, _wrapu, _wrapv,
324 state->setTextureAttributeAndModes(0, texture);
325 _tex_cache[fname] = texture;
329 state->setTextureAttributeAndModes(0, _tex_cache_iter->second.get());
330 // cout << "Cache hit: " << fname << endl;
332 osg::TexEnv* texEnv = new osg::TexEnv;
333 texEnv->setMode(osg::TexEnv::MODULATE);
334 state->setTextureAttributeAndModes(0, texEnv);
337 SGMaterialGlyph* SGMaterial::get_glyph (const string& name) const
339 map<string, SGSharedPtr<SGMaterialGlyph> >::const_iterator it;
340 it = glyphs.find(name);
341 if (it == glyphs.end())
348 ////////////////////////////////////////////////////////////////////////
350 ////////////////////////////////////////////////////////////////////////
352 SGMaterialGlyph::SGMaterialGlyph(SGPropertyNode *p) :
353 _left(p->getDoubleValue("left", 0.0)),
354 _right(p->getDoubleValue("right", 1.0))