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>
33 #include <osg/CullFace>
34 #include <osg/Material>
35 #include <osg/ShadeModel>
37 #include <osg/Texture2D>
38 #include <osgDB/ReadFile>
39 #include <osgDB/FileUtils>
41 #include <simgear/debug/logstream.hxx>
42 #include <simgear/misc/sg_path.hxx>
43 #include <simgear/misc/sgstream.hxx>
45 #include <simgear/scene/model/model.hxx>
46 #include <simgear/scene/util/StateAttributeFactory.hxx>
51 using namespace simgear;
54 ////////////////////////////////////////////////////////////////////////
55 // Constructors and destructor.
56 ////////////////////////////////////////////////////////////////////////
59 SGMaterial::SGMaterial( const string &fg_root, const SGPropertyNode *props )
62 read_properties( fg_root, props );
66 SGMaterial::SGMaterial( const string &texpath )
70 _internal_state st( NULL, texpath, false );
71 _status.push_back( st );
76 SGMaterial::SGMaterial( osg::StateSet *s )
82 SGMaterial::~SGMaterial (void)
87 ////////////////////////////////////////////////////////////////////////
89 ////////////////////////////////////////////////////////////////////////
92 SGMaterial::read_properties( const string &fg_root, const SGPropertyNode *props)
94 // Gather the path(s) to the texture(s)
95 vector<SGPropertyNode_ptr> textures = props->getChildren("texture");
96 for (unsigned int i = 0; i < textures.size(); i++)
98 string tname = textures[i]->getStringValue();
100 tname = "unknown.rgb";
103 SGPath tpath( fg_root );
104 tpath.append("Textures.high");
106 if ( !osgDB::fileExists(tpath.str()) ) {
107 tpath = SGPath( fg_root );
108 tpath.append("Textures");
112 if ( osgDB::fileExists(tpath.str()) ) {
113 _internal_state st( NULL, tpath.str(), false );
114 _status.push_back( st );
118 if (textures.size() == 0) {
119 string tname = "unknown.rgb";
120 SGPath tpath( fg_root );
121 tpath.append("Textures");
122 tpath.append("Terrain");
124 _internal_state st( NULL, tpath.str(), true );
125 _status.push_back( st );
128 xsize = props->getDoubleValue("xsize", 0.0);
129 ysize = props->getDoubleValue("ysize", 0.0);
130 wrapu = props->getBoolValue("wrapu", true);
131 wrapv = props->getBoolValue("wrapv", true);
132 mipmap = props->getBoolValue("mipmap", true);
133 light_coverage = props->getDoubleValue("light-coverage", 0.0);
134 tree_coverage = props->getDoubleValue("tree-coverage", 0.0);
135 tree_height = props->getDoubleValue("tree-height-m", 0.0);
136 tree_width = props->getDoubleValue("tree-width-m", 0.0);
137 tree_range = props->getDoubleValue("tree-range-m", 0.0);
138 tree_varieties = props->getIntValue("tree-varieties", 1);
140 SGPath tpath( fg_root );
141 tpath.append(props->getStringValue("tree-texture"));
142 tree_texture = tpath.str();
144 // surface values for use with ground reactions
145 solid = props->getBoolValue("solid", true);
146 friction_factor = props->getDoubleValue("friction-factor", 1.0);
147 rolling_friction = props->getDoubleValue("rolling-friction", 0.02);
148 bumpiness = props->getDoubleValue("bumpiness", 0.0);
149 load_resistance = props->getDoubleValue("load-resistance", 1e30);
151 // Taken from default values as used in ac3d
152 ambient[0] = props->getDoubleValue("ambient/r", 0.2);
153 ambient[1] = props->getDoubleValue("ambient/g", 0.2);
154 ambient[2] = props->getDoubleValue("ambient/b", 0.2);
155 ambient[3] = props->getDoubleValue("ambient/a", 1.0);
157 diffuse[0] = props->getDoubleValue("diffuse/r", 0.8);
158 diffuse[1] = props->getDoubleValue("diffuse/g", 0.8);
159 diffuse[2] = props->getDoubleValue("diffuse/b", 0.8);
160 diffuse[3] = props->getDoubleValue("diffuse/a", 1.0);
162 specular[0] = props->getDoubleValue("specular/r", 0.0);
163 specular[1] = props->getDoubleValue("specular/g", 0.0);
164 specular[2] = props->getDoubleValue("specular/b", 0.0);
165 specular[3] = props->getDoubleValue("specular/a", 1.0);
167 emission[0] = props->getDoubleValue("emissive/r", 0.0);
168 emission[1] = props->getDoubleValue("emissive/g", 0.0);
169 emission[2] = props->getDoubleValue("emissive/b", 0.0);
170 emission[3] = props->getDoubleValue("emissive/a", 1.0);
172 shininess = props->getDoubleValue("shininess", 1.0);
174 vector<SGPropertyNode_ptr> object_group_nodes =
175 ((SGPropertyNode *)props)->getChildren("object-group");
176 for (unsigned int i = 0; i < object_group_nodes.size(); i++)
177 object_groups.push_back(new SGMatModelGroup(object_group_nodes[i]));
179 // read glyph table for taxi-/runway-signs
180 vector<SGPropertyNode_ptr> glyph_nodes = props->getChildren("glyph");
181 for (unsigned int i = 0; i < glyph_nodes.size(); i++) {
182 const char *name = glyph_nodes[i]->getStringValue("name");
184 glyphs[name] = new SGMaterialGlyph(glyph_nodes[i]);
190 ////////////////////////////////////////////////////////////////////////
192 ////////////////////////////////////////////////////////////////////////
205 light_coverage = 0.0;
209 rolling_friction = 0.02;
211 load_resistance = 1e30;
214 for (int i = 0; i < 4; i++) {
215 ambient[i] = (i < 3) ? 0.2 : 1.0;
216 specular[i] = (i < 3) ? 0.0 : 1.0;
217 diffuse[i] = (i < 3) ? 0.8 : 1.0;
218 emission[i] = (i < 3) ? 0.0 : 1.0;
223 SGMaterial::get_state (int n)
225 if (_status.size() == 0) {
226 SG_LOG( SG_GENERAL, SG_WARN, "No state available.");
230 int i = n >= 0 ? n : _current_ptr;
232 if(!_status[i].texture_loaded)
234 assignTexture(_status[i].state.get(), _status[i].texture_path,
235 wrapu, wrapv, mipmap);
236 _status[i].texture_loaded = true;
238 osg::StateSet *st = _status[i].state.get();
241 if (_current_ptr >= _status.size())
249 SGMaterial::build_state( bool defer_tex_load )
251 StateAttributeFactory *attrFact = StateAttributeFactory::instance();
252 for (unsigned int i = 0; i < _status.size(); i++)
254 osg::StateSet *stateSet = new osg::StateSet;
255 stateSet->setUserData(new SGMaterialUserData(this));
257 // Set up the textured state
258 stateSet->setAttribute(attrFact->getSmoothShadeModel());
259 stateSet->setAttributeAndModes(attrFact->getCullFaceBack());
261 stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
263 _status[i].texture_loaded = false;
265 osg::Material* material = new osg::Material;
266 material->setColorMode(osg::Material::AMBIENT_AND_DIFFUSE);
267 material->setAmbient(osg::Material::FRONT_AND_BACK, ambient.osg());
268 material->setDiffuse(osg::Material::FRONT_AND_BACK, diffuse.osg());
269 material->setSpecular(osg::Material::FRONT_AND_BACK, specular.osg());
270 material->setEmission(osg::Material::FRONT_AND_BACK, emission.osg());
271 material->setShininess(osg::Material::FRONT_AND_BACK, shininess );
272 stateSet->setAttribute(material);
274 if (ambient[3] < 1 || diffuse[3] < 1 ||
275 specular[3] < 1 || emission[3] < 1) {
276 stateSet->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
277 stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
278 stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
280 stateSet->setRenderingHint(osg::StateSet::OPAQUE_BIN);
281 stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
282 stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
285 _status[i].state = stateSet;
290 void SGMaterial::set_state( osg::StateSet *s )
292 _status.push_back( _internal_state( s, "", true ) );
295 void SGMaterial::assignTexture( osg::StateSet *state, const std::string &fname,
296 bool _wrapu, bool _wrapv, bool _mipmap )
298 osg::Texture2D* texture = SGLoadTexture2D(fname, 0, _wrapu, _wrapv,
300 texture->setMaxAnisotropy( SGGetTextureFilter());
301 state->setTextureAttributeAndModes(0, texture);
303 StateAttributeFactory *attrFact = StateAttributeFactory::instance();
304 state->setTextureAttributeAndModes(0, attrFact->getStandardTexEnv());
307 SGMaterialGlyph* SGMaterial::get_glyph (const string& name) const
309 map<string, SGSharedPtr<SGMaterialGlyph> >::const_iterator it;
310 it = glyphs.find(name);
311 if (it == glyphs.end())
318 ////////////////////////////////////////////////////////////////////////
320 ////////////////////////////////////////////////////////////////////////
322 SGMaterialGlyph::SGMaterialGlyph(SGPropertyNode *p) :
323 _left(p->getDoubleValue("left", 0.0)),
324 _right(p->getDoubleValue("right", 1.0))
329 SGSetTextureFilter( int max) {
330 SGSceneFeatures::instance()->setTextureFilter( max);
334 SGGetTextureFilter() {
335 return SGSceneFeatures::instance()->getTextureFilter();