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/Texture>
44 #include <osg/Texture2D>
45 #include <osgDB/ReaderWriter>
46 #include <osgDB/ReadFile>
47 #include <osgDB/Registry>
48 #include <osgDB/FileUtils>
50 #include <simgear/debug/logstream.hxx>
51 #include <simgear/misc/sg_path.hxx>
52 #include <simgear/misc/sgstream.hxx>
53 #include <simgear/scene/util/SGReaderWriterOptions.hxx>
54 #include <simgear/props/props_io.hxx>
55 #include <simgear/scene/model/model.hxx>
56 #include <simgear/scene/util/RenderConstants.hxx>
57 #include <simgear/scene/util/StateAttributeFactory.hxx>
60 #include "Technique.hxx"
65 using namespace simgear;
68 ////////////////////////////////////////////////////////////////////////
69 // Constructors and destructor.
70 ////////////////////////////////////////////////////////////////////////
72 SGMaterial::_internal_state::_internal_state(Effect *e, bool l,
73 const SGReaderWriterOptions* o)
74 : effect(e), effect_realized(l), options(o)
78 SGMaterial::_internal_state::_internal_state(Effect *e, const string &t, bool l,
79 const SGReaderWriterOptions* o)
80 : effect(e), effect_realized(l), options(o)
82 texture_paths.push_back(std::make_pair(t,0));
85 void SGMaterial::_internal_state::add_texture(const std::string &t, int i)
87 texture_paths.push_back(std::make_pair(t,i));
90 SGMaterial::SGMaterial( const SGReaderWriterOptions* options,
91 const SGPropertyNode *props,
92 SGPropertyNode *prop_root )
95 read_properties( options, props, prop_root );
96 buildEffectProperties(options);
99 SGMaterial::SGMaterial( const osgDB::Options* options,
100 const SGPropertyNode *props,
101 SGPropertyNode *prop_root)
103 osg::ref_ptr<SGReaderWriterOptions> opt;
104 opt = SGReaderWriterOptions::copyOrCreate(options);
106 read_properties(opt.get(), props, prop_root);
107 buildEffectProperties(opt.get());
110 SGMaterial::~SGMaterial (void)
115 ////////////////////////////////////////////////////////////////////////
117 ////////////////////////////////////////////////////////////////////////
120 SGMaterial::read_properties(const SGReaderWriterOptions* options,
121 const SGPropertyNode *props,
122 SGPropertyNode *prop_root)
124 std::vector<bool> dds;
125 std::vector<SGPropertyNode_ptr> textures = props->getChildren("texture");
126 for (unsigned int i = 0; i < textures.size(); i++)
128 string tname = textures[i]->getStringValue();
131 tname = "unknown.rgb";
134 SGPath tpath("Textures.high");
136 string fullTexPath = SGModelLib::findDataFile(tpath.str(), options);
137 if (fullTexPath.empty()) {
138 tpath = SGPath("Textures");
140 fullTexPath = SGModelLib::findDataFile(tpath.str(), options);
141 if (fullTexPath.empty()) {
142 SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find texture \""
143 << tname << "\" in Textures or Textures.high folders.");
147 if (tpath.lower_extension() == "dds") {
150 dds.push_back(false);
153 if (!fullTexPath.empty() ) {
154 _internal_state st( NULL, fullTexPath, false, options );
155 _status.push_back( st );
159 std::vector<SGPropertyNode_ptr> texturesets = props->getChildren("texture-set");
160 for (unsigned int i = 0; i < texturesets.size(); i++)
162 _internal_state st( NULL, false, options );
163 std::vector<SGPropertyNode_ptr> textures = texturesets[i]->getChildren("texture");
164 for (unsigned int j = 0; j < textures.size(); j++)
166 string tname = textures[j]->getStringValue();
168 tname = "unknown.rgb";
171 SGPath tpath("Textures.high");
173 string fullTexPath = SGModelLib::findDataFile(tpath.str(), options);
174 if (fullTexPath.empty()) {
175 tpath = SGPath("Textures");
177 fullTexPath = SGModelLib::findDataFile(tpath.str(), options);
178 if (fullTexPath.empty() ) {
179 SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find texture \""
180 << tname << "\" in Textures or Textures.high folders.");
185 if (tpath.lower_extension() == "dds") {
188 dds.push_back(false);
192 st.add_texture(fullTexPath, textures[j]->getIndex());
195 if (!st.texture_paths.empty() ) {
196 _status.push_back( st );
200 if (textures.size() == 0 && texturesets.size() == 0) {
201 SGPath tpath("Textures");
202 tpath.append("Terrain");
203 tpath.append("unknown.rgb");
204 _internal_state st( NULL, tpath.str(), true, options );
205 _status.push_back( st );
208 std::vector<SGPropertyNode_ptr> masks = props->getChildren("object-mask");
209 for (unsigned int i = 0; i < masks.size(); i++)
211 string omname = masks[i]->getStringValue();
213 if (! omname.empty()) {
214 SGPath ompath("Textures.high");
215 ompath.append(omname);
216 string fullMaskPath = SGModelLib::findDataFile(ompath.str(), options);
218 if (fullMaskPath.empty()) {
219 ompath = SGPath("Textures");
220 ompath.append(omname);
221 fullMaskPath = SGModelLib::findDataFile(ompath.str(), options);
224 if (fullMaskPath.empty()) {
225 SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find texture \""
226 << omname << "\" in Textures or Textures.high folders.");
230 osg::Image* image = osgDB::readImageFile(fullMaskPath, options);
231 if (image && image->valid())
233 osg::Texture2D* object_mask = new osg::Texture2D;
235 bool dds_mask = (ompath.lower_extension() == "dds");
237 if (dds[i] != dds_mask) {
238 // Texture format does not match mask format. This is relevant for
239 // the object mask, as DDS textures have an origin at the bottom
240 // left rather than top left, therefore we flip the object mask
242 image->flipVertical();
245 object_mask->setImage(image);
247 // We force the filtering to be nearest, as the red channel (rotation)
248 // in particular, doesn't make sense to be interpolated between pixels.
249 object_mask->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST);
250 object_mask->setFilter(osg::Texture::MAG_FILTER, osg::Texture::NEAREST);
252 object_mask->setDataVariance(osg::Object::STATIC);
253 object_mask->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
254 object_mask->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
255 _masks.push_back(object_mask);
261 xsize = props->getDoubleValue("xsize", 0.0);
262 ysize = props->getDoubleValue("ysize", 0.0);
263 wrapu = props->getBoolValue("wrapu", true);
264 wrapv = props->getBoolValue("wrapv", true);
265 mipmap = props->getBoolValue("mipmap", true);
266 light_coverage = props->getDoubleValue("light-coverage", 0.0);
267 wood_coverage = props->getDoubleValue("wood-coverage", 0.0);
268 tree_height = props->getDoubleValue("tree-height-m", 0.0);
269 tree_width = props->getDoubleValue("tree-width-m", 0.0);
270 tree_range = props->getDoubleValue("tree-range-m", 0.0);
271 tree_varieties = props->getIntValue("tree-varieties", 1);
273 const SGPropertyNode* treeTexNode = props->getChild("tree-texture");
276 string treeTexPath = props->getStringValue("tree-texture");
278 if (! treeTexPath.empty()) {
279 SGPath treePath("Textures.high");
280 treePath.append(treeTexPath);
281 tree_texture = SGModelLib::findDataFile(treePath.str(), options);
283 if (tree_texture.empty()) {
284 treePath = SGPath("Textures");
285 treePath.append(treeTexPath);
286 tree_texture = SGModelLib::findDataFile(treePath.str(), options);
291 // surface values for use with ground reactions
292 solid = props->getBoolValue("solid", true);
293 friction_factor = props->getDoubleValue("friction-factor", 1.0);
294 rolling_friction = props->getDoubleValue("rolling-friction", 0.02);
295 bumpiness = props->getDoubleValue("bumpiness", 0.0);
296 load_resistance = props->getDoubleValue("load-resistance", 1e30);
298 // Taken from default values as used in ac3d
299 ambient[0] = props->getDoubleValue("ambient/r", 0.2);
300 ambient[1] = props->getDoubleValue("ambient/g", 0.2);
301 ambient[2] = props->getDoubleValue("ambient/b", 0.2);
302 ambient[3] = props->getDoubleValue("ambient/a", 1.0);
304 diffuse[0] = props->getDoubleValue("diffuse/r", 0.8);
305 diffuse[1] = props->getDoubleValue("diffuse/g", 0.8);
306 diffuse[2] = props->getDoubleValue("diffuse/b", 0.8);
307 diffuse[3] = props->getDoubleValue("diffuse/a", 1.0);
309 specular[0] = props->getDoubleValue("specular/r", 0.0);
310 specular[1] = props->getDoubleValue("specular/g", 0.0);
311 specular[2] = props->getDoubleValue("specular/b", 0.0);
312 specular[3] = props->getDoubleValue("specular/a", 1.0);
314 emission[0] = props->getDoubleValue("emissive/r", 0.0);
315 emission[1] = props->getDoubleValue("emissive/g", 0.0);
316 emission[2] = props->getDoubleValue("emissive/b", 0.0);
317 emission[3] = props->getDoubleValue("emissive/a", 1.0);
319 shininess = props->getDoubleValue("shininess", 1.0);
321 if (props->hasChild("effect"))
322 effect = props->getStringValue("effect");
324 std::vector<SGPropertyNode_ptr> object_group_nodes =
325 ((SGPropertyNode *)props)->getChildren("object-group");
326 for (unsigned int i = 0; i < object_group_nodes.size(); i++)
327 object_groups.push_back(new SGMatModelGroup(object_group_nodes[i]));
329 // read glyph table for taxi-/runway-signs
330 std::vector<SGPropertyNode_ptr> glyph_nodes = props->getChildren("glyph");
331 for (unsigned int i = 0; i < glyph_nodes.size(); i++) {
332 const char *name = glyph_nodes[i]->getStringValue("name");
334 glyphs[name] = new SGMaterialGlyph(glyph_nodes[i]);
337 // Read conditions node
338 const SGPropertyNode *conditionNode = props->getChild("condition");
340 condition = sgReadCondition(prop_root, conditionNode);
346 ////////////////////////////////////////////////////////////////////////
348 ////////////////////////////////////////////////////////////////////////
360 light_coverage = 0.0;
364 rolling_friction = 0.02;
366 load_resistance = 1e30;
369 for (int i = 0; i < 4; i++) {
370 ambient[i] = (i < 3) ? 0.2 : 1.0;
371 specular[i] = (i < 3) ? 0.0 : 1.0;
372 diffuse[i] = (i < 3) ? 0.8 : 1.0;
373 emission[i] = (i < 3) ? 0.0 : 1.0;
375 effect = "Effects/terrain-default";
378 Effect* SGMaterial::get_effect(int i)
380 if(!_status[i].effect_realized) {
381 if (!_status[i].effect.valid())
383 _status[i].effect->realizeTechniques(_status[i].options.get());
384 _status[i].effect_realized = true;
386 return _status[i].effect.get();
389 Effect* SGMaterial::get_effect(SGTexturedTriangleBin triangleBin)
391 if (_status.size() == 0) {
392 SG_LOG( SG_GENERAL, SG_WARN, "No effect available.");
396 int i = triangleBin.getTextureIndex() % _status.size();
397 return get_effect(i);
400 Effect* SGMaterial::get_effect()
402 return get_effect(0);
406 osg::Texture2D* SGMaterial::get_object_mask(SGTexturedTriangleBin triangleBin)
408 if (_status.size() == 0) {
409 SG_LOG( SG_GENERAL, SG_WARN, "No mask available.");
413 // Note that the object mask is closely linked to the texture/effect
414 // so we index based on the texture index,
415 unsigned int i = triangleBin.getTextureIndex() % _status.size();
416 if (i < _masks.size()) {
423 void SGMaterial::buildEffectProperties(const SGReaderWriterOptions* options)
426 ref_ptr<SGMaterialUserData> user = new SGMaterialUserData(this);
427 SGPropertyNode_ptr propRoot = new SGPropertyNode();
428 makeChild(propRoot, "inherits-from")->setStringValue(effect);
429 SGPropertyNode* paramProp = makeChild(propRoot, "parameters");
430 SGPropertyNode* materialProp = makeChild(paramProp, "material");
431 makeChild(materialProp, "ambient")->setValue(SGVec4d(ambient));
432 makeChild(materialProp, "diffuse")->setValue(SGVec4d(diffuse));
433 makeChild(materialProp, "specular")->setValue(SGVec4d(specular));
434 makeChild(materialProp, "emissive")->setValue(SGVec4d(emission));
435 makeChild(materialProp, "shininess")->setFloatValue(shininess);
436 if (ambient[3] < 1 || diffuse[3] < 1 ||
437 specular[3] < 1 || emission[3] < 1) {
438 makeChild(paramProp, "transparent")->setBoolValue(true);
439 SGPropertyNode* binProp = makeChild(paramProp, "render-bin");
440 makeChild(binProp, "bin-number")->setIntValue(TRANSPARENT_BIN);
441 makeChild(binProp, "bin-name")->setStringValue("DepthSortedBin");
443 BOOST_FOREACH(_internal_state& matState, _status)
445 SGPropertyNode_ptr effectProp = new SGPropertyNode();
446 copyProperties(propRoot, effectProp);
447 SGPropertyNode* effectParamProp = effectProp->getChild("parameters", 0);
448 for (unsigned int i = 0; i < matState.texture_paths.size(); i++) {
449 SGPropertyNode* texProp = makeChild(effectParamProp, "texture", matState.texture_paths[i].second);
450 makeChild(texProp, "image")->setStringValue(matState.texture_paths[i].first);
451 makeChild(texProp, "filter")
452 ->setStringValue(mipmap ? "linear-mipmap-linear" : "nearest");
453 makeChild(texProp, "wrap-s")
454 ->setStringValue(wrapu ? "repeat" : "clamp");
455 makeChild(texProp, "wrap-t")
456 ->setStringValue(wrapv ? "repeat" : "clamp");
458 makeChild(effectParamProp, "xsize")->setDoubleValue(xsize);
459 makeChild(effectParamProp, "ysize")->setDoubleValue(ysize);
460 makeChild(effectParamProp, "scale")->setValue(SGVec3d(xsize,ysize,0.0));
461 makeChild(effectParamProp, "light-coverage")->setDoubleValue(light_coverage);
463 matState.effect = makeEffect(effectProp, false, options);
464 if (matState.effect.valid())
465 matState.effect->setUserData(user.get());
469 SGMaterialGlyph* SGMaterial::get_glyph (const string& name) const
471 map<string, SGSharedPtr<SGMaterialGlyph> >::const_iterator it;
472 it = glyphs.find(name);
473 if (it == glyphs.end())
480 ////////////////////////////////////////////////////////////////////////
482 ////////////////////////////////////////////////////////////////////////
484 SGMaterialGlyph::SGMaterialGlyph(SGPropertyNode *p) :
485 _left(p->getDoubleValue("left", 0.0)),
486 _right(p->getDoubleValue("right", 1.0))
491 SGSetTextureFilter( int max) {
492 SGSceneFeatures::instance()->setTextureFilter( max);
496 SGGetTextureFilter() {
497 return SGSceneFeatures::instance()->getTextureFilter();