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>
35 #include <boost/foreach.hpp>
38 #include <osg/CullFace>
39 #include <osg/Material>
40 #include <osg/ShadeModel>
41 #include <osg/StateSet>
43 #include <osg/Texture2D>
44 #include <osgDB/ReaderWriter>
45 #include <osgDB/ReadFile>
46 #include <osgDB/Registry>
47 #include <osgDB/FileUtils>
49 #include <simgear/debug/logstream.hxx>
50 #include <simgear/misc/sg_path.hxx>
51 #include <simgear/misc/sgstream.hxx>
52 #include <simgear/props/props_io.hxx>
53 #include <simgear/scene/model/model.hxx>
54 #include <simgear/scene/util/RenderConstants.hxx>
55 #include <simgear/scene/util/StateAttributeFactory.hxx>
58 #include "Technique.hxx"
63 using namespace simgear;
66 ////////////////////////////////////////////////////////////////////////
67 // Constructors and destructor.
68 ////////////////////////////////////////////////////////////////////////
70 SGMaterial::_internal_state::_internal_state(Effect *e, const string &t, bool l,
71 const osgDB::ReaderWriter::Options* o ) :
72 effect(e), texture_path(t), effect_realized(l), options(o)
76 SGMaterial::SGMaterial( const osgDB::ReaderWriter::Options* options,
77 const SGPropertyNode *props )
80 read_properties( options, props );
81 buildEffectProperties(options);
84 SGMaterial::~SGMaterial (void)
89 ////////////////////////////////////////////////////////////////////////
91 ////////////////////////////////////////////////////////////////////////
94 SGMaterial::read_properties(const osgDB::ReaderWriter::Options* options,
95 const SGPropertyNode *props)
97 // Gather the path(s) to the texture(s)
98 vector<SGPropertyNode_ptr> textures = props->getChildren("texture");
99 for (unsigned int i = 0; i < textures.size(); i++)
101 string tname = textures[i]->getStringValue();
103 tname = "unknown.rgb";
105 SGPath tpath("Textures.high");
107 string fullTexPath = osgDB::findDataFile(tpath.str(), options);
108 if (fullTexPath.empty()) {
109 tpath = SGPath("Textures");
111 fullTexPath = osgDB::findDataFile(tpath.str(), options);
114 if (!fullTexPath.empty() ) {
115 _internal_state st( NULL, fullTexPath, false, options );
116 _status.push_back( st );
120 if (textures.size() == 0) {
121 SGPath tpath("Textures");
122 tpath.append("Terrain");
123 tpath.append("unknown.rgb");
124 _internal_state st( NULL, tpath.str(), true, options );
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 wood_coverage = props->getDoubleValue("wood-coverage", 0.0);
135 wood_size = props->getDoubleValue("wood-size", 0.0);
136 tree_density = props->getDoubleValue("tree-density", 1.0);
137 tree_height = props->getDoubleValue("tree-height-m", 0.0);
138 tree_width = props->getDoubleValue("tree-width-m", 0.0);
139 tree_range = props->getDoubleValue("tree-range-m", 0.0);
140 tree_varieties = props->getIntValue("tree-varieties", 1);
142 const SGPropertyNode* treeTexNode = props->getChild("tree-texture");
144 string treeTexPath = props->getStringValue("tree-texture");
145 tree_texture = osgDB::findDataFile(treeTexPath, options);
148 // surface values for use with ground reactions
149 solid = props->getBoolValue("solid", true);
150 friction_factor = props->getDoubleValue("friction-factor", 1.0);
151 rolling_friction = props->getDoubleValue("rolling-friction", 0.02);
152 bumpiness = props->getDoubleValue("bumpiness", 0.0);
153 load_resistance = props->getDoubleValue("load-resistance", 1e30);
155 // Taken from default values as used in ac3d
156 ambient[0] = props->getDoubleValue("ambient/r", 0.2);
157 ambient[1] = props->getDoubleValue("ambient/g", 0.2);
158 ambient[2] = props->getDoubleValue("ambient/b", 0.2);
159 ambient[3] = props->getDoubleValue("ambient/a", 1.0);
161 diffuse[0] = props->getDoubleValue("diffuse/r", 0.8);
162 diffuse[1] = props->getDoubleValue("diffuse/g", 0.8);
163 diffuse[2] = props->getDoubleValue("diffuse/b", 0.8);
164 diffuse[3] = props->getDoubleValue("diffuse/a", 1.0);
166 specular[0] = props->getDoubleValue("specular/r", 0.0);
167 specular[1] = props->getDoubleValue("specular/g", 0.0);
168 specular[2] = props->getDoubleValue("specular/b", 0.0);
169 specular[3] = props->getDoubleValue("specular/a", 1.0);
171 emission[0] = props->getDoubleValue("emissive/r", 0.0);
172 emission[1] = props->getDoubleValue("emissive/g", 0.0);
173 emission[2] = props->getDoubleValue("emissive/b", 0.0);
174 emission[3] = props->getDoubleValue("emissive/a", 1.0);
176 shininess = props->getDoubleValue("shininess", 1.0);
178 if (props->hasChild("effect"))
179 effect = props->getStringValue("effect");
181 vector<SGPropertyNode_ptr> object_group_nodes =
182 ((SGPropertyNode *)props)->getChildren("object-group");
183 for (unsigned int i = 0; i < object_group_nodes.size(); i++)
184 object_groups.push_back(new SGMatModelGroup(object_group_nodes[i]));
186 // read glyph table for taxi-/runway-signs
187 vector<SGPropertyNode_ptr> glyph_nodes = props->getChildren("glyph");
188 for (unsigned int i = 0; i < glyph_nodes.size(); i++) {
189 const char *name = glyph_nodes[i]->getStringValue("name");
191 glyphs[name] = new SGMaterialGlyph(glyph_nodes[i]);
197 ////////////////////////////////////////////////////////////////////////
199 ////////////////////////////////////////////////////////////////////////
212 light_coverage = 0.0;
216 rolling_friction = 0.02;
218 load_resistance = 1e30;
221 for (int i = 0; i < 4; i++) {
222 ambient[i] = (i < 3) ? 0.2 : 1.0;
223 specular[i] = (i < 3) ? 0.0 : 1.0;
224 diffuse[i] = (i < 3) ? 0.8 : 1.0;
225 emission[i] = (i < 3) ? 0.0 : 1.0;
227 effect = "Effects/terrain-default";
230 Effect* SGMaterial::get_effect(int n)
232 if (_status.size() == 0) {
233 SG_LOG( SG_GENERAL, SG_WARN, "No effect available.");
236 int i = n >= 0 ? n : _current_ptr;
237 if(!_status[i].effect_realized) {
238 _status[i].effect->realizeTechniques(_status[i].options.get());
239 _status[i].effect_realized = true;
241 // XXX This business of returning a "random" alternate texture is
242 // really bogus. It means that the appearance of the terrain
243 // depends on the order in which it is paged in!
244 _current_ptr = (_current_ptr + 1) % _status.size();
245 return _status[i].effect.get();
248 void SGMaterial::buildEffectProperties(const osgDB::ReaderWriter::Options*
252 ref_ptr<SGMaterialUserData> user = new SGMaterialUserData(this);
253 SGPropertyNode_ptr propRoot = new SGPropertyNode();
254 makeChild(propRoot, "inherits-from")->setStringValue(effect);
255 SGPropertyNode* paramProp = makeChild(propRoot, "parameters");
256 SGPropertyNode* materialProp = makeChild(paramProp, "material");
257 makeChild(materialProp, "ambient")->setValue(SGVec4d(ambient));
258 makeChild(materialProp, "diffuse")->setValue(SGVec4d(diffuse));
259 makeChild(materialProp, "specular")->setValue(SGVec4d(specular));
260 makeChild(materialProp, "emissive")->setValue(SGVec4d(emission));
261 makeChild(materialProp, "shininess")->setFloatValue(shininess);
262 if (ambient[3] < 1 || diffuse[3] < 1 ||
263 specular[3] < 1 || emission[3] < 1) {
264 makeChild(paramProp, "transparent")->setBoolValue(true);
265 SGPropertyNode* binProp = makeChild(paramProp, "render-bin");
266 makeChild(binProp, "bin-number")->setIntValue(TRANSPARENT_BIN);
267 makeChild(binProp, "bin-name")->setStringValue("DepthSortedBin");
269 BOOST_FOREACH(_internal_state& matState, _status)
271 SGPropertyNode_ptr effectProp = new SGPropertyNode();
272 copyProperties(propRoot, effectProp);
273 SGPropertyNode* effectParamProp = effectProp->getChild("parameters", 0);
274 SGPropertyNode* texProp = makeChild(effectParamProp, "texture");
275 makeChild(texProp, "image")->setStringValue(matState.texture_path);
276 makeChild(texProp, "filter")
277 ->setStringValue(mipmap ? "linear-mipmap-linear" : "nearest");
278 makeChild(texProp, "wrap-s")
279 ->setStringValue(wrapu ? "repeat" : "clamp");
280 makeChild(texProp, "wrap-t")
281 ->setStringValue(wrapv ? "repeat" : "clamp");
282 matState.effect = makeEffect(effectProp, false, options);
283 matState.effect->setUserData(user.get());
287 SGMaterialGlyph* SGMaterial::get_glyph (const string& name) const
289 map<string, SGSharedPtr<SGMaterialGlyph> >::const_iterator it;
290 it = glyphs.find(name);
291 if (it == glyphs.end())
298 ////////////////////////////////////////////////////////////////////////
300 ////////////////////////////////////////////////////////////////////////
302 SGMaterialGlyph::SGMaterialGlyph(SGPropertyNode *p) :
303 _left(p->getDoubleValue("left", 0.0)),
304 _right(p->getDoubleValue("right", 1.0))
309 SGSetTextureFilter( int max) {
310 SGSceneFeatures::instance()->setTextureFilter( max);
314 SGGetTextureFilter() {
315 return SGSceneFeatures::instance()->getTextureFilter();