simgear/scene/material/mat.cxx

   1 // mat.cxx -- class to handle material properties
   2 //
   3 // Written by Curtis Olson, started May 1998.
   4 //
   5 // Copyright (C) 1998 - 2000  Curtis L. Olson  - http://www.flightgear.org/~curt
   6 //
   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.
  11 //
  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.
  16 //
  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.
  20 //
  21 // $Id$
  22
  23
  24 #ifdef HAVE_CONFIG_H
  25 #  include <simgear_config.h>
  26 #endif
  27
  28 #include <simgear/compiler.h>
  29
  30 #include <string.h>
  31 #include <map>
  32 #include <vector>
  33 #include <string>
  34
  35 #include <boost/foreach.hpp>
  36 #include "mat.hxx"
  37
  38 #include <osg/CullFace>
  39 #include <osg/Material>
  40 #include <osg/ShadeModel>
  41 #include <osg/StateSet>
  42 #include <osg/TexEnv>
  43 #include <osg/Texture>
  44 #include <osg/Texture2D>
  45 #include <osgDB/ReaderWriter>
  46 #include <osgDB/ReadFile>
  47 #include <osgDB/Registry>
  48 #include <osgDB/FileUtils>
  49
  50 #include <simgear/debug/logstream.hxx>
  51 #include <simgear/misc/sg_path.hxx>
  52 #include <simgear/misc/sgstream.hxx>
  53 #include <simgear/threads/SGGuard.hxx>
  54
  55 #include <simgear/scene/util/SGReaderWriterOptions.hxx>
  56 #include <simgear/props/props_io.hxx>
  57 #include <simgear/props/vectorPropTemplates.hxx>
  58 #include <simgear/scene/model/model.hxx>
  59 #include <simgear/scene/material/matmodel.hxx>
  60 #include <simgear/scene/util/RenderConstants.hxx>
  61 #include <simgear/scene/util/StateAttributeFactory.hxx>
  62 #include <simgear/props/condition.hxx>
  63 #include <simgear/scene/util/SGSceneFeatures.hxx>
  64 #include <simgear/scene/tgdb/SGTexturedTriangleBin.hxx>
  65
  66 #include "Effect.hxx"
  67 #include "Technique.hxx"
  68 #include "Pass.hxx"
  69
  70 using std::map;
  71 using std::string;
  72 using namespace simgear;
  73
  74 \f
  75 ////////////////////////////////////////////////////////////////////////
  76 // Constructors and destructor.
  77 ////////////////////////////////////////////////////////////////////////
  78
  79 SGMaterial::_internal_state::_internal_state(Effect *e, bool l,
  80                                              const SGReaderWriterOptions* o)
  81     : effect(e), effect_realized(l), options(o)
  82 {
  83 }
  84
  85 SGMaterial::_internal_state::_internal_state(Effect *e, const string &t, bool l,
  86                                              const SGReaderWriterOptions* o)
  87     : effect(e), effect_realized(l), options(o)
  88 {
  89     texture_paths.push_back(std::make_pair(t,0));
  90 }
  91
  92 void SGMaterial::_internal_state::add_texture(const std::string &t, int i)
  93 {
  94     texture_paths.push_back(std::make_pair(t,i));
  95 }
  96
  97 SGMaterial::SGMaterial( const SGReaderWriterOptions* options,
  98                         const SGPropertyNode *props,
  99                         SGPropertyNode *prop_root )
 100 {
 101     init();
 102     read_properties( options, props, prop_root );
 103     buildEffectProperties(options);
 104 }
 105
 106 SGMaterial::SGMaterial( const osgDB::Options* options,
 107                         const SGPropertyNode *props,
 108                         SGPropertyNode *prop_root)
 109 {
 110     osg::ref_ptr<SGReaderWriterOptions> opt;
 111     opt = SGReaderWriterOptions::copyOrCreate(options);
 112     init();
 113     read_properties(opt.get(), props, prop_root);
 114     buildEffectProperties(opt.get());
 115 }
 116
 117 SGMaterial::~SGMaterial (void)
 118 {
 119 }
 120
 121 \f
 122 ////////////////////////////////////////////////////////////////////////
 123 // Public methods.
 124 ////////////////////////////////////////////////////////////////////////
 125
 126 void
 127 SGMaterial::read_properties(const SGReaderWriterOptions* options,
 128                             const SGPropertyNode *props,
 129                             SGPropertyNode *prop_root)
 130 {
 131     std::vector<bool> dds;
 132     std::vector<SGPropertyNode_ptr> textures = props->getChildren("texture");
 133     for (unsigned int i = 0; i < textures.size(); i++)
 134     {
 135         string tname = textures[i]->getStringValue();
 136
 137         if (tname.empty()) {
 138             tname = "unknown.rgb";
 139         }
 140
 141         SGPath tpath("Textures.high");
 142         tpath.append(tname);
 143         string fullTexPath = SGModelLib::findDataFile(tpath.str(), options);
 144         if (fullTexPath.empty()) {
 145             tpath.set("Textures");
 146             tpath.append(tname);
 147             fullTexPath = SGModelLib::findDataFile(tpath.str(), options);
 148             if (fullTexPath.empty()) {
 149                 SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find texture \""
 150                         << tname << "\" in Textures or Textures.high folders.");
 151             }
 152         }
 153
 154         if (tpath.lower_extension() == "dds") {
 155             dds.push_back(true);
 156         } else {
 157             dds.push_back(false);
 158         }
 159
 160         if (!fullTexPath.empty() ) {
 161             _internal_state st( NULL, fullTexPath, false, options );
 162             _status.push_back( st );
 163         }
 164     }
 165
 166     std::vector<SGPropertyNode_ptr> texturesets = props->getChildren("texture-set");
 167     for (unsigned int i = 0; i < texturesets.size(); i++)
 168     {
 169         _internal_state st( NULL, false, options );
 170         std::vector<SGPropertyNode_ptr> textures = texturesets[i]->getChildren("texture");
 171         for (unsigned int j = 0; j < textures.size(); j++)
 172         {
 173             string tname = textures[j]->getStringValue();
 174             if (tname.empty()) {
 175                 tname = "unknown.rgb";
 176             }
 177
 178             SGPath tpath("Textures.high");
 179             tpath.append(tname);
 180             string fullTexPath = SGModelLib::findDataFile(tpath.str(), options);
 181             if (fullTexPath.empty()) {
 182                 tpath.set("Textures");
 183                 tpath.append(tname);
 184                 fullTexPath = SGModelLib::findDataFile(tpath.str(), options);
 185                 if (fullTexPath.empty() ) {
 186                     SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find texture \""
 187                             << tname << "\" in Textures or Textures.high folders.");
 188                 }
 189             }
 190
 191             if (j == 0) {
 192                 if (tpath.lower_extension() == "dds") {
 193                     dds.push_back(true);
 194                 } else {
 195                     dds.push_back(false);
 196                 }
 197             }
 198
 199             st.add_texture(fullTexPath, textures[j]->getIndex());
 200         }
 201
 202         if (!st.texture_paths.empty() ) {
 203             _status.push_back( st );
 204         }
 205     }
 206
 207     if (textures.empty() && texturesets.empty()) {
 208         SGPath tpath("Textures");
 209         tpath.append("Terrain");
 210         tpath.append("unknown.rgb");
 211         _internal_state st( NULL, tpath.str(), true, options );
 212         _status.push_back( st );
 213     }
 214
 215     std::vector<SGPropertyNode_ptr> masks = props->getChildren("object-mask");
 216     for (unsigned int i = 0; i < masks.size(); i++)
 217     {
 218         string omname = masks[i]->getStringValue();
 219
 220         if (! omname.empty()) {
 221             SGPath ompath("Textures.high");
 222             ompath.append(omname);
 223             string fullMaskPath = SGModelLib::findDataFile(ompath.str(), options);
 224
 225             if (fullMaskPath.empty()) {
 226                 ompath.set("Textures");
 227                 ompath.append(omname);
 228                 fullMaskPath = SGModelLib::findDataFile(ompath.str(), options);
 229             }
 230
 231             if (fullMaskPath.empty()) {
 232                 SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find texture \""
 233                         << omname << "\" in Textures or Textures.high folders.");
 234             }
 235             else
 236             {
 237                 osg::Image* image = osgDB::readImageFile(fullMaskPath, options);
 238                 if (image && image->valid())
 239                 {
 240                     osg::Texture2D* object_mask = new osg::Texture2D;
 241
 242                     bool dds_mask = (ompath.lower_extension() == "dds");
 243
 244                     if (i < dds.size() && dds[i] != dds_mask) {
 245                         // Texture format does not match mask format. This is relevant for
 246                         // the object mask, as DDS textures have an origin at the bottom
 247                         // left rather than top left. Therefore we flip a copy of the image
 248                         // (otherwise a second reference to the object mask would flip it
 249                         // back!).
 250                         SG_LOG(SG_GENERAL, SG_DEBUG, "Flipping object mask" << omname);
 251                         image = (osg::Image* ) image->clone(osg::CopyOp::SHALLOW_COPY);
 252                         image->flipVertical();
 253                     }
 254
 255                     object_mask->setImage(image);
 256
 257                     // We force the filtering to be nearest, as the red channel (rotation)
 258                     // in particular, doesn't make sense to be interpolated between pixels.
 259                     object_mask->setFilter(osg::Texture::MIN_FILTER, osg::Texture::NEAREST);
 260                     object_mask->setFilter(osg::Texture::MAG_FILTER, osg::Texture::NEAREST);
 261
 262                     object_mask->setDataVariance(osg::Object::STATIC);
 263                     object_mask->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
 264                     object_mask->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);
 265                     _masks.push_back(object_mask);
 266                 }
 267             }
 268         }
 269     }
 270
 271     xsize = props->getDoubleValue("xsize", 0.0);
 272     ysize = props->getDoubleValue("ysize", 0.0);
 273     wrapu = props->getBoolValue("wrapu", true);
 274     wrapv = props->getBoolValue("wrapv", true);
 275     mipmap = props->getBoolValue("mipmap", true);
 276     light_coverage = props->getDoubleValue("light-coverage", 0.0);
 277
 278     // Building properties
 279     building_coverage = props->getDoubleValue("building-coverage", 0.0);
 280     building_spacing = props->getDoubleValue("building-spacing-m", 5.0);
 281
 282     string bt = props->getStringValue("building-texture", "Textures/buildings.png");
 283     building_texture = SGModelLib::findDataFile(bt, options);
 284
 285     if (building_texture.empty()) {
 286         SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find texture \"" << bt);
 287     }
 288
 289     bt = props->getStringValue("building-lightmap", "Textures/buildings-lightmap.png");
 290     building_lightmap = SGModelLib::findDataFile(bt, options);
 291
 292     if (building_lightmap.empty()) {
 293         SG_LOG(SG_GENERAL, SG_ALERT, "Cannot find texture \"" << bt);
 294     }
 295
 296     building_small_ratio = props->getDoubleValue("building-small-ratio", 0.8);
 297     building_medium_ratio = props->getDoubleValue("building-medium-ratio", 0.15);
 298     building_large_ratio =  props->getDoubleValue("building-large-ratio", 0.05);
 299
 300     building_small_pitch =  props->getDoubleValue("building-small-pitch", 0.8);
 301     building_medium_pitch =  props->getDoubleValue("building-medium-pitch", 0.2);
 302     building_large_pitch =  props->getDoubleValue("building-large-pitch", 0.1);
 303
 304     building_small_min_floors = props->getIntValue("building-small-min-floors", 1);
 305     building_small_max_floors = props->getIntValue("building-small-max-floors", 3);
 306     building_medium_min_floors = props->getIntValue("building-medium-min-floors", 3);
 307     building_medium_max_floors = props->getIntValue("building-medium-max-floors", 8);
 308     building_large_min_floors = props->getIntValue("building-large-min-floors", 5);
 309     building_large_max_floors = props->getIntValue("building-large-max-floors", 20);
 310
 311     building_small_min_width = props->getFloatValue("building-small-min-width-m", 15.0);
 312     building_small_max_width = props->getFloatValue("building-small-max-width-m", 60.0);
 313     building_small_min_depth = props->getFloatValue("building-small-min-depth-m", 10.0);
 314     building_small_max_depth = props->getFloatValue("building-small-max-depth-m", 20.0);
 315
 316     building_medium_min_width = props->getFloatValue("building-medium-min-width-m", 25.0);
 317     building_medium_max_width = props->getFloatValue("building-medium-max-width-m", 50.0);
 318     building_medium_min_depth = props->getFloatValue("building-medium-min-depth-m", 20.0);
 319     building_medium_max_depth = props->getFloatValue("building-medium-max-depth-m", 50.0);
 320
 321     building_large_min_width = props->getFloatValue("building-large-min-width-m", 50.0);
 322     building_large_max_width = props->getFloatValue("building-large-max-width-m", 75.0);
 323     building_large_min_depth = props->getFloatValue("building-large-min-depth-m", 50.0);
 324     building_large_max_depth = props->getFloatValue("building-large-max-depth-m", 75.0);
 325
 326     building_range = props->getDoubleValue("building-range-m", 10000.0);
 327
 328     cos_object_max_density_slope_angle  = cos(props->getFloatValue("object-max-density-angle-deg", 20.0) * osg::PI/180.0);
 329     cos_object_zero_density_slope_angle = cos(props->getFloatValue("object-zero-density-angle-deg", 30.0) * osg::PI/180.0);
 330
 331     // Random vegetation properties
 332     wood_coverage = props->getDoubleValue("wood-coverage", 0.0);
 333     tree_height = props->getDoubleValue("tree-height-m", 0.0);
 334     tree_width = props->getDoubleValue("tree-width-m", 0.0);
 335     tree_range = props->getDoubleValue("tree-range-m", 0.0);
 336     tree_varieties = props->getIntValue("tree-varieties", 1);
 337     cos_tree_max_density_slope_angle  = cos(props->getFloatValue("tree-max-density-angle-deg", 30.0) * osg::PI/180.0);
 338     cos_tree_zero_density_slope_angle = cos(props->getFloatValue("tree-zero-density-angle-deg", 45.0) * osg::PI/180.0);
 339
 340     const SGPropertyNode* treeTexNode = props->getChild("tree-texture");
 341
 342     if (treeTexNode) {
 343         string treeTexPath = props->getStringValue("tree-texture");
 344
 345         if (! treeTexPath.empty()) {
 346             SGPath treePath("Textures.high");
 347             treePath.append(treeTexPath);
 348             tree_texture = SGModelLib::findDataFile(treePath.str(), options);
 349
 350             if (tree_texture.empty()) {
 351                 treePath.set("Textures");
 352                 treePath.append(treeTexPath);
 353                 tree_texture = SGModelLib::findDataFile(treePath.str(), options);
 354             }
 355         }
 356     }
 357
 358     // surface values for use with ground reactions
 359     _solid = props->getBoolValue("solid", _solid);
 360     _friction_factor = props->getDoubleValue("friction-factor", _friction_factor);
 361     _rolling_friction = props->getDoubleValue("rolling-friction", _rolling_friction);
 362     _bumpiness = props->getDoubleValue("bumpiness", _bumpiness);
 363     _load_resistance = props->getDoubleValue("load-resistance", _load_resistance);
 364
 365     // Taken from default values as used in ac3d
 366     ambient[0] = props->getDoubleValue("ambient/r", 0.2);
 367     ambient[1] = props->getDoubleValue("ambient/g", 0.2);
 368     ambient[2] = props->getDoubleValue("ambient/b", 0.2);
 369     ambient[3] = props->getDoubleValue("ambient/a", 1.0);
 370
 371     diffuse[0] = props->getDoubleValue("diffuse/r", 0.8);
 372     diffuse[1] = props->getDoubleValue("diffuse/g", 0.8);
 373     diffuse[2] = props->getDoubleValue("diffuse/b", 0.8);
 374     diffuse[3] = props->getDoubleValue("diffuse/a", 1.0);
 375
 376     specular[0] = props->getDoubleValue("specular/r", 0.0);
 377     specular[1] = props->getDoubleValue("specular/g", 0.0);
 378     specular[2] = props->getDoubleValue("specular/b", 0.0);
 379     specular[3] = props->getDoubleValue("specular/a", 1.0);
 380
 381     emission[0] = props->getDoubleValue("emissive/r", 0.0);
 382     emission[1] = props->getDoubleValue("emissive/g", 0.0);
 383     emission[2] = props->getDoubleValue("emissive/b", 0.0);
 384     emission[3] = props->getDoubleValue("emissive/a", 1.0);
 385
 386     shininess = props->getDoubleValue("shininess", 1.0);
 387
 388     if (props->hasChild("effect"))
 389         effect = props->getStringValue("effect");
 390
 391     std::vector<SGPropertyNode_ptr> object_group_nodes =
 392             ((SGPropertyNode *)props)->getChildren("object-group");
 393     for (unsigned int i = 0; i < object_group_nodes.size(); i++)
 394         object_groups.push_back(new SGMatModelGroup(object_group_nodes[i]));
 395
 396     // read glyph table for taxi-/runway-signs
 397     std::vector<SGPropertyNode_ptr> glyph_nodes = props->getChildren("glyph");
 398     for (unsigned int i = 0; i < glyph_nodes.size(); i++) {
 399         const char *name = glyph_nodes[i]->getStringValue("name");
 400         if (name)
 401             glyphs[name] = new SGMaterialGlyph(glyph_nodes[i]);
 402     }
 403
 404     // Read parameters entry, which is passed into the effect
 405     if (props->hasChild("parameters")) {
 406         parameters = props->getChild("parameters");
 407     } else {
 408         parameters = new SGPropertyNode();
 409     }
 410
 411     // Read conditions node
 412     const SGPropertyNode *conditionNode = props->getChild("condition");
 413     if (conditionNode) {
 414         condition = sgReadCondition(prop_root, conditionNode);
 415     }
 416 }
 417
 418
 419 \f
 420 ////////////////////////////////////////////////////////////////////////
 421 // Private methods.
 422 ////////////////////////////////////////////////////////////////////////
 423
 424 void
 425 SGMaterial::init ()
 426 {
 427     _status.clear();
 428     xsize = 0;
 429     ysize = 0;
 430     wrapu = true;
 431     wrapv = true;
 432
 433     mipmap = true;
 434     light_coverage = 0.0;
 435     building_coverage = 0.0;
 436
 437     shininess = 1.0;
 438     for (int i = 0; i < 4; i++) {
 439         ambient[i]  = (i < 3) ? 0.2 : 1.0;
 440         specular[i] = (i < 3) ? 0.0 : 1.0;
 441         diffuse[i]  = (i < 3) ? 0.8 : 1.0;
 442         emission[i] = (i < 3) ? 0.0 : 1.0;
 443     }
 444     effect = "Effects/terrain-default";
 445 }
 446
 447 Effect* SGMaterial::get_effect(int i)
 448 {
 449     if(!_status[i].effect_realized) {
 450         if (!_status[i].effect.valid())
 451             return 0;
 452         _status[i].effect->realizeTechniques(_status[i].options.get());
 453         _status[i].effect_realized = true;
 454     }
 455     return _status[i].effect.get();
 456 }
 457
 458 Effect* SGMaterial::get_effect(const SGTexturedTriangleBin& triangleBin)
 459 {
 460     SGGuard<SGMutex> g(_lock);
 461     if (_status.empty()) {
 462         SG_LOG( SG_GENERAL, SG_WARN, "No effect available.");
 463         return 0;
 464     }
 465
 466     int i = triangleBin.getTextureIndex() % _status.size();
 467     return get_effect(i);
 468 }
 469
 470 Effect* SGMaterial::get_effect()
 471 {
 472     SGGuard<SGMutex> g(_lock);
 473     return get_effect(0);
 474 }
 475
 476
 477 osg::Texture2D* SGMaterial::get_object_mask(const SGTexturedTriangleBin& triangleBin)
 478 {
 479     if (_status.empty()) {
 480         SG_LOG( SG_GENERAL, SG_WARN, "No mask available.");
 481         return 0;
 482     }
 483
 484     // Note that the object mask is closely linked to the texture/effect
 485     // so we index based on the texture index,
 486     unsigned int i = triangleBin.getTextureIndex() % _status.size();
 487     if (i < _masks.size()) {
 488         return _masks[i];
 489     } else {
 490         return 0;
 491     }
 492 }
 493
 494 void SGMaterial::buildEffectProperties(const SGReaderWriterOptions* options)
 495 {
 496     using namespace osg;
 497     ref_ptr<SGMaterialUserData> user = new SGMaterialUserData(this);
 498     SGPropertyNode_ptr propRoot = new SGPropertyNode();
 499     makeChild(propRoot, "inherits-from")->setStringValue(effect);
 500
 501     SGPropertyNode* paramProp = makeChild(propRoot, "parameters");
 502     copyProperties(parameters, paramProp);
 503
 504     SGPropertyNode* materialProp = makeChild(paramProp, "material");
 505     makeChild(materialProp, "ambient")->setValue(SGVec4d(ambient));
 506     makeChild(materialProp, "diffuse")->setValue(SGVec4d(diffuse));
 507     makeChild(materialProp, "specular")->setValue(SGVec4d(specular));
 508     makeChild(materialProp, "emissive")->setValue(SGVec4d(emission));
 509     makeChild(materialProp, "shininess")->setFloatValue(shininess);
 510     if (ambient[3] < 1 || diffuse[3] < 1 ||
 511         specular[3] < 1 || emission[3] < 1) {
 512         makeChild(paramProp, "transparent")->setBoolValue(true);
 513         SGPropertyNode* binProp = makeChild(paramProp, "render-bin");
 514         makeChild(binProp, "bin-number")->setIntValue(TRANSPARENT_BIN);
 515         makeChild(binProp, "bin-name")->setStringValue("DepthSortedBin");
 516     }
 517     BOOST_FOREACH(_internal_state& matState, _status)
 518     {
 519         SGPropertyNode_ptr effectProp = new SGPropertyNode();
 520         copyProperties(propRoot, effectProp);
 521         SGPropertyNode* effectParamProp = effectProp->getChild("parameters", 0);
 522         for (unsigned int i = 0; i < matState.texture_paths.size(); i++) {
 523             SGPropertyNode* texProp = makeChild(effectParamProp, "texture", matState.texture_paths[i].second);
 524             makeChild(texProp, "image")->setStringValue(matState.texture_paths[i].first);
 525             makeChild(texProp, "filter")
 526                 ->setStringValue(mipmap ? "linear-mipmap-linear" : "nearest");
 527             makeChild(texProp, "wrap-s")
 528                 ->setStringValue(wrapu ? "repeat" : "clamp-to-edge");
 529             makeChild(texProp, "wrap-t")
 530                 ->setStringValue(wrapv ? "repeat" : "clamp-to-edge");
 531         }
 532         makeChild(effectParamProp, "xsize")->setDoubleValue(xsize);
 533         makeChild(effectParamProp, "ysize")->setDoubleValue(ysize);
 534         makeChild(effectParamProp, "scale")->setValue(SGVec3d(xsize,ysize,0.0));
 535         makeChild(effectParamProp, "light-coverage")->setDoubleValue(light_coverage);
 536
 537         matState.effect = makeEffect(effectProp, false, options);
 538         if (matState.effect.valid())
 539             matState.effect->setUserData(user.get());
 540     }
 541 }
 542
 543 SGMaterialGlyph* SGMaterial::get_glyph (const string& name) const
 544 {
 545     map<string, SGSharedPtr<SGMaterialGlyph> >::const_iterator it;
 546     it = glyphs.find(name);
 547     if (it == glyphs.end())
 548         return 0;
 549
 550     return it->second;
 551 }
 552
 553 bool SGMaterial::valid() const
 554 {
 555   if (condition) {
 556     return condition->test();
 557   } else {
 558     return true;
 559   }
 560 }
 561
 562 \f
 563 ////////////////////////////////////////////////////////////////////////
 564 // SGMaterialGlyph.
 565 ////////////////////////////////////////////////////////////////////////
 566
 567 SGMaterialGlyph::SGMaterialGlyph(SGPropertyNode *p) :
 568     _left(p->getDoubleValue("left", 0.0)),
 569     _right(p->getDoubleValue("right", 1.0))
 570 {
 571 }
 572
 573 void
 574 SGSetTextureFilter( int max) {
 575     SGSceneFeatures::instance()->setTextureFilter( max);
 576 }
 577
 578 int
 579 SGGetTextureFilter() {
 580     return SGSceneFeatures::instance()->getTextureFilter();
 581 }