simgear/scene/material/TextureBuilder.cxx

   1 // Copyright (C) 2009  Tim Moore timoore@redhat.com
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Library General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Library General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program; if not, write to the Free Software
  15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16
  17 #ifdef HAVE_CONFIG_H
  18 #  include <simgear_config.h>
  19 #endif
  20
  21 #include "TextureBuilder.hxx"
  22
  23 #include "Pass.hxx"
  24
  25 #include <osg/TexEnv>
  26 #include <osg/TexEnvCombine>
  27 #include <osg/TexGen>
  28 #include <osg/Texture1D>
  29 #include <osg/Texture2D>
  30 #include <osg/Texture3D>
  31 #include <osg/TextureRectangle>
  32 #include <osgDB/FileUtils>
  33
  34 #include <boost/lexical_cast.hpp>
  35 #include <boost/tuple/tuple.hpp>
  36 #include <boost/tuple/tuple_comparison.hpp>
  37
  38 #include <simgear/scene/util/SGSceneFeatures.hxx>
  39 #include <simgear/scene/util/StateAttributeFactory.hxx>
  40 #include <simgear/math/SGMath.hxx>
  41 #include <simgear/structure/OSGUtils.hxx>
  42
  43 #include "Noise.hxx"
  44
  45 namespace simgear
  46 {
  47 using namespace std;
  48 using namespace osg;
  49
  50 using namespace effect;
  51
  52 TexEnvCombine* buildTexEnvCombine(Effect* effect,
  53                                   const SGPropertyNode* envProp);
  54 TexGen* buildTexGen(Effect* Effect, const SGPropertyNode* tgenProp);
  55
  56 // Hack to force inclusion of TextureBuilder.cxx in library
  57 osg::Texture* TextureBuilder::buildFromType(Effect* effect, const string& type,
  58                                             const SGPropertyNode*props,
  59                                             const osgDB::ReaderWriter::Options*
  60                                             options)
  61 {
  62     return EffectBuilder<Texture>::buildFromType(effect, type, props, options);
  63 }
  64
  65 typedef boost::tuple<string, Texture::FilterMode, Texture::FilterMode,
  66                      Texture::WrapMode, Texture::WrapMode, Texture::WrapMode,
  67                      string> TexTuple;
  68
  69 EffectNameValue<TexEnv::Mode> texEnvModesInit[] =
  70 {
  71     {"add", TexEnv::ADD},
  72     {"blend", TexEnv::BLEND},
  73     {"decal", TexEnv::DECAL},
  74     {"modulate", TexEnv::MODULATE},
  75     {"replace", TexEnv::REPLACE}
  76 };
  77 EffectPropertyMap<TexEnv::Mode> texEnvModes(texEnvModesInit);
  78
  79 TexEnv* buildTexEnv(Effect* effect, const SGPropertyNode* prop)
  80 {
  81     const SGPropertyNode* modeProp = getEffectPropertyChild(effect, prop,
  82                                                             "mode");
  83     const SGPropertyNode* colorProp = getEffectPropertyChild(effect, prop,
  84                                                              "color");
  85     if (!modeProp)
  86         return 0;
  87     TexEnv::Mode mode = TexEnv::MODULATE;
  88     findAttr(texEnvModes, modeProp, mode);
  89     if (mode == TexEnv::MODULATE) {
  90         return StateAttributeFactory::instance()->getStandardTexEnv();
  91     }
  92     TexEnv* env = new TexEnv(mode);
  93     if (colorProp)
  94         env->setColor(toOsg(colorProp->getValue<SGVec4d>()));
  95     return env;
  96  }
  97
  98
  99 void TextureUnitBuilder::buildAttribute(Effect* effect, Pass* pass,
 100                                         const SGPropertyNode* prop,
 101                                         const osgDB::ReaderWriter::Options* options)
 102 {
 103     if (!isAttributeActive(effect, prop))
 104         return;
 105     // Decode the texture unit
 106     int unit = 0;
 107     const SGPropertyNode* pUnit = prop->getChild("unit");
 108     if (pUnit) {
 109         unit = pUnit->getValue<int>();
 110     } else {
 111         const SGPropertyNode* pName = prop->getChild("name");
 112         if (pName)
 113             try {
 114                 unit = boost::lexical_cast<int>(pName->getStringValue());
 115             } catch (boost::bad_lexical_cast& lex) {
 116                 SG_LOG(SG_INPUT, SG_ALERT, "can't decode name as texture unit "
 117                        << lex.what());
 118             }
 119     }
 120     const SGPropertyNode* pType = getEffectPropertyChild(effect, prop, "type");
 121     string type;
 122     if (!pType)
 123         type = "2d";
 124     else
 125         type = pType->getStringValue();
 126     Texture* texture = 0;
 127     try {
 128         texture = TextureBuilder::buildFromType(effect, type, prop,
 129                                                 options);
 130     }
 131     catch (BuilderException& e) {
 132         SG_LOG(SG_INPUT, SG_ALERT, "No image file for texture, using white ");
 133         texture = StateAttributeFactory::instance()->getWhiteTexture();
 134     }
 135     pass->setTextureAttributeAndModes(unit, texture);
 136     const SGPropertyNode* envProp = prop->getChild("environment");
 137     if (envProp) {
 138         TexEnv* env = buildTexEnv(effect, envProp);
 139         if (env)
 140             pass->setTextureAttributeAndModes(unit, env);
 141     }
 142     const SGPropertyNode* combineProp = prop->getChild("texenv-combine");
 143     TexEnvCombine* combiner = 0;
 144     if (combineProp && ((combiner = buildTexEnvCombine(effect, combineProp))))
 145         pass->setTextureAttributeAndModes(unit, combiner);
 146     const SGPropertyNode* tgenProp = prop->getChild("texgen");
 147     TexGen* tgen = 0;
 148     if (tgenProp && (tgen = buildTexGen(effect, tgenProp)))
 149         pass->setTextureAttributeAndModes(unit, tgen);
 150 }
 151
 152 // InstallAttributeBuilder call is in Effect.cxx to force this file to
 153 // be linked in.
 154
 155 namespace
 156 {
 157 EffectNameValue<Texture::FilterMode> filterModesInit[] =
 158 {
 159     { "linear", Texture::LINEAR },
 160     { "linear-mipmap-linear", Texture::LINEAR_MIPMAP_LINEAR},
 161     { "linear-mipmap-nearest", Texture::LINEAR_MIPMAP_NEAREST},
 162     { "nearest", Texture::NEAREST},
 163     { "nearest-mipmap-linear", Texture::NEAREST_MIPMAP_LINEAR},
 164     { "nearest-mipmap-nearest", Texture::NEAREST_MIPMAP_NEAREST}
 165 };
 166 EffectPropertyMap<Texture::FilterMode> filterModes(filterModesInit);
 167
 168 EffectNameValue<Texture::WrapMode> wrapModesInit[] =
 169 {
 170     {"clamp", Texture::CLAMP},
 171     {"clamp-to-border", Texture::CLAMP_TO_BORDER},
 172     {"clamp-to-edge", Texture::CLAMP_TO_EDGE},
 173     {"mirror", Texture::MIRROR},
 174     {"repeat", Texture::REPEAT}
 175 };
 176 EffectPropertyMap<Texture::WrapMode> wrapModes(wrapModesInit);
 177
 178
 179 TexTuple makeTexTuple(Effect* effect, const SGPropertyNode* props,
 180                       const osgDB::ReaderWriter::Options* options,
 181                       const string& texType)
 182 {
 183     Texture::FilterMode minFilter = Texture::LINEAR_MIPMAP_LINEAR;
 184     findAttr(filterModes, getEffectPropertyChild(effect, props, "filter"),
 185              minFilter);
 186     Texture::FilterMode magFilter = Texture::LINEAR;
 187     findAttr(filterModes, getEffectPropertyChild(effect, props,
 188                                                  "mag-filter"),
 189              magFilter);
 190     const SGPropertyNode* pWrapS
 191         = getEffectPropertyChild(effect, props, "wrap-s");
 192     Texture::WrapMode sWrap = Texture::CLAMP;
 193     findAttr(wrapModes, pWrapS, sWrap);
 194     const SGPropertyNode* pWrapT
 195         = getEffectPropertyChild(effect, props, "wrap-t");
 196     Texture::WrapMode tWrap = Texture::CLAMP;
 197     findAttr(wrapModes, pWrapT, tWrap);
 198     const SGPropertyNode* pWrapR
 199         = getEffectPropertyChild(effect, props, "wrap-r");
 200     Texture::WrapMode rWrap = Texture::CLAMP;
 201     findAttr(wrapModes, pWrapR, rWrap);
 202     const SGPropertyNode* pImage
 203         = getEffectPropertyChild(effect, props, "image");
 204     string imageName;
 205     if (pImage)
 206         imageName = pImage->getStringValue();
 207     string absFileName = osgDB::findDataFile(imageName, options);
 208     return TexTuple(absFileName, minFilter, magFilter, sWrap, tWrap, rWrap,
 209                     texType);
 210 }
 211
 212 void setAttrs(const TexTuple& attrs, Texture* tex,
 213               const osgDB::ReaderWriter::Options* options)
 214 {
 215     const string& imageName = attrs.get<0>();
 216     if (imageName.empty()) {
 217         throw BuilderException("no image file");
 218     } else {
 219         osgDB::ReaderWriter::ReadResult result
 220             = osgDB::Registry::instance()->readImage(imageName, options);
 221         if (result.success()) {
 222             osg::Image* image = result.getImage();
 223             tex->setImage(GL_FRONT_AND_BACK, image);
 224             int s = image->s();
 225             int t = image->t();
 226             if (s <= t && 32 <= s) {
 227                 SGSceneFeatures::instance()->setTextureCompression(tex);
 228             } else if (t < s && 32 <= t) {
 229                 SGSceneFeatures::instance()->setTextureCompression(tex);
 230             }
 231             tex->setMaxAnisotropy(SGSceneFeatures::instance()
 232                                   ->getTextureFilter());
 233         } else {
 234             SG_LOG(SG_INPUT, SG_ALERT, "failed to load effect texture file "
 235                    << imageName);
 236         }
 237     }
 238     // texture->setDataVariance(osg::Object::STATIC);
 239     tex->setFilter(Texture::MIN_FILTER, attrs.get<1>());
 240     tex->setFilter(Texture::MAG_FILTER, attrs.get<2>());
 241     tex->setWrap(Texture::WRAP_S, attrs.get<3>());
 242     tex->setWrap(Texture::WRAP_T, attrs.get<4>());
 243     tex->setWrap(Texture::WRAP_R, attrs.get<5>());
 244 }
 245 }
 246
 247 template<typename T>
 248 class TexBuilder : public TextureBuilder
 249 {
 250 public:
 251     TexBuilder(const string& texType) : _type(texType) {}
 252     Texture* build(Effect* effect, const SGPropertyNode*,
 253                    const osgDB::ReaderWriter::Options* options);
 254 protected:
 255     typedef map<TexTuple, ref_ptr<T> > TexMap;
 256     TexMap texMap;
 257     const string _type;
 258 };
 259
 260 template<typename T>
 261 Texture* TexBuilder<T>::build(Effect* effect, const SGPropertyNode* props,
 262                               const osgDB::ReaderWriter::Options* options)
 263 {
 264     TexTuple attrs = makeTexTuple(effect, props, options, _type);
 265     typename TexMap::iterator itr = texMap.find(attrs);
 266     if (itr != texMap.end())
 267         return itr->second.get();
 268     T* tex = new T;
 269     setAttrs(attrs, tex, options);
 270     texMap.insert(make_pair(attrs, tex));
 271     return tex;
 272 }
 273
 274
 275 namespace
 276 {
 277 TextureBuilder::Registrar install1D("1d", new TexBuilder<Texture1D>("1d"));
 278 TextureBuilder::Registrar install2D("2d", new TexBuilder<Texture2D>("2d"));
 279 TextureBuilder::Registrar install3D("3d", new TexBuilder<Texture3D>("3d"));
 280 }
 281
 282 class WhiteTextureBuilder : public TextureBuilder
 283 {
 284 public:
 285     Texture* build(Effect* effect, const SGPropertyNode*,
 286                    const osgDB::ReaderWriter::Options* options);
 287 };
 288
 289 Texture* WhiteTextureBuilder::build(Effect* effect, const SGPropertyNode*,
 290                                     const osgDB::ReaderWriter::Options* options)
 291 {
 292     return StateAttributeFactory::instance()->getWhiteTexture();
 293 }
 294
 295 namespace
 296 {
 297 TextureBuilder::Registrar installWhite("white", new WhiteTextureBuilder);
 298 }
 299
 300 class TransparentTextureBuilder : public TextureBuilder
 301 {
 302 public:
 303     Texture* build(Effect* effect, const SGPropertyNode*,
 304                    const osgDB::ReaderWriter::Options* options);
 305 };
 306
 307 Texture* TransparentTextureBuilder::build(Effect* effect, const SGPropertyNode*,
 308                                     const osgDB::ReaderWriter::Options* options)
 309 {
 310     return StateAttributeFactory::instance()->getTransparentTexture();
 311 }
 312
 313 namespace
 314 {
 315 TextureBuilder::Registrar installTransparent("transparent",
 316                                              new TransparentTextureBuilder);
 317 }
 318
 319 osg::Image* make3DNoiseImage(int texSize)
 320 {
 321     osg::Image* image = new osg::Image;
 322     image->setImage(texSize, texSize, texSize,
 323                     4, GL_RGBA, GL_UNSIGNED_BYTE,
 324                     new unsigned char[4 * texSize * texSize * texSize],
 325                     osg::Image::USE_NEW_DELETE);
 326
 327     const int startFrequency = 4;
 328     const int numOctaves = 4;
 329
 330     int f, i, j, k, inc;
 331     double ni[3];
 332     double inci, incj, inck;
 333     int frequency = startFrequency;
 334     GLubyte *ptr;
 335     double amp = 0.5;
 336
 337     osg::notify(osg::WARN) << "creating 3D noise texture... ";
 338
 339     for (f = 0, inc = 0; f < numOctaves; ++f, frequency *= 2, ++inc, amp *= 0.5)
 340     {
 341         SetNoiseFrequency(frequency);
 342         ptr = image->data();
 343         ni[0] = ni[1] = ni[2] = 0;
 344
 345         inci = 1.0 / (texSize / frequency);
 346         for (i = 0; i < texSize; ++i, ni[0] += inci)
 347         {
 348             incj = 1.0 / (texSize / frequency);
 349             for (j = 0; j < texSize; ++j, ni[1] += incj)
 350             {
 351                 inck = 1.0 / (texSize / frequency);
 352                 for (k = 0; k < texSize; ++k, ni[2] += inck, ptr += 4)
 353                 {
 354                     *(ptr+inc) = (GLubyte) (((noise3(ni) + 1.0) * amp) * 128.0);
 355                 }
 356             }
 357         }
 358     }
 359
 360     osg::notify(osg::WARN) << "DONE" << std::endl;
 361     return image;
 362 }
 363
 364 class NoiseBuilder : public TextureBuilder
 365 {
 366 public:
 367     Texture* build(Effect* effect, const SGPropertyNode*,
 368                    const osgDB::ReaderWriter::Options* options);
 369 protected:
 370     typedef map<int, ref_ptr<Texture3D> > NoiseMap;
 371     NoiseMap _noises;
 372 };
 373
 374 Texture* NoiseBuilder::build(Effect* effect, const SGPropertyNode* props,
 375                              const osgDB::ReaderWriter::Options* options)
 376 {
 377     int texSize = 64;
 378     const SGPropertyNode* sizeProp = getEffectPropertyChild(effect, props,
 379                                                             "size");
 380     if (sizeProp)
 381         texSize = sizeProp->getValue<int>();
 382     NoiseMap::iterator itr = _noises.find(texSize);
 383     if (itr != _noises.end())
 384         return itr->second.get();
 385     Texture3D* noiseTexture = new osg::Texture3D;
 386     noiseTexture->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture3D::LINEAR);
 387     noiseTexture->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture3D::LINEAR);
 388     noiseTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture3D::REPEAT);
 389     noiseTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture3D::REPEAT);
 390     noiseTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture3D::REPEAT);
 391     noiseTexture->setImage( make3DNoiseImage(texSize) );
 392     _noises.insert(make_pair(texSize, noiseTexture));
 393     return noiseTexture;
 394 }
 395
 396 namespace
 397 {
 398 TextureBuilder::Registrar installNoise("noise", new NoiseBuilder);
 399 }
 400
 401 EffectNameValue<TexEnvCombine::CombineParam> combineParamInit[] =
 402 {
 403     {"replace", TexEnvCombine::REPLACE},
 404     {"modulate", TexEnvCombine::MODULATE},
 405     {"add", TexEnvCombine::ADD},
 406     {"add-signed", TexEnvCombine::ADD_SIGNED},
 407     {"interpolate", TexEnvCombine::INTERPOLATE},
 408     {"subtract", TexEnvCombine::SUBTRACT},
 409     {"dot3-rgb", TexEnvCombine::DOT3_RGB},
 410     {"dot3-rgba", TexEnvCombine::DOT3_RGBA}
 411 };
 412
 413 EffectPropertyMap<TexEnvCombine::CombineParam> combineParams(combineParamInit);
 414
 415 EffectNameValue<TexEnvCombine::SourceParam> sourceParamInit[] =
 416 {
 417     {"constant", TexEnvCombine::CONSTANT},
 418     {"primary_color", TexEnvCombine::PRIMARY_COLOR},
 419     {"previous", TexEnvCombine::PREVIOUS},
 420     {"texture", TexEnvCombine::TEXTURE},
 421     {"texture0", TexEnvCombine::TEXTURE0},
 422     {"texture1", TexEnvCombine::TEXTURE1},
 423     {"texture2", TexEnvCombine::TEXTURE2},
 424     {"texture3", TexEnvCombine::TEXTURE3},
 425     {"texture4", TexEnvCombine::TEXTURE4},
 426     {"texture5", TexEnvCombine::TEXTURE5},
 427     {"texture6", TexEnvCombine::TEXTURE6},
 428     {"texture7", TexEnvCombine::TEXTURE7}
 429 };
 430
 431 EffectPropertyMap<TexEnvCombine::SourceParam> sourceParams(sourceParamInit);
 432
 433 EffectNameValue<TexEnvCombine::OperandParam> opParamInit[] =
 434 {
 435     {"src_color", TexEnvCombine::SRC_COLOR},
 436     {"one_minus_src_color", TexEnvCombine::ONE_MINUS_SRC_COLOR},
 437     {"src_alpha", TexEnvCombine::SRC_ALPHA},
 438     {"one_minus_src_alpha", TexEnvCombine::ONE_MINUS_SRC_ALPHA}
 439 };
 440
 441 EffectPropertyMap<TexEnvCombine::OperandParam> operandParams(opParamInit);
 442
 443 TexEnvCombine* buildTexEnvCombine(Effect* effect, const SGPropertyNode* envProp)
 444 {
 445     if (!isAttributeActive(effect, envProp))
 446         return 0;
 447     TexEnvCombine* result = new TexEnvCombine;
 448     const SGPropertyNode* p = 0;
 449     if ((p = getEffectPropertyChild(effect, envProp, "combine-rgb"))) {
 450         TexEnvCombine::CombineParam crgb = TexEnvCombine::MODULATE;
 451         findAttr(combineParams, p, crgb);
 452         result->setCombine_RGB(crgb);
 453     }
 454     if ((p = getEffectPropertyChild(effect, envProp, "combine-alpha"))) {
 455         TexEnvCombine::CombineParam calpha = TexEnvCombine::MODULATE;
 456         findAttr(combineParams, p, calpha);
 457         result->setCombine_Alpha(calpha);
 458     }
 459     if ((p = getEffectPropertyChild(effect, envProp, "source0-rgb"))) {
 460         TexEnvCombine::SourceParam source = TexEnvCombine::TEXTURE;
 461         findAttr(sourceParams, p, source);
 462         result->setSource0_RGB(source);
 463     }
 464     if ((p = getEffectPropertyChild(effect, envProp, "source1-rgb"))) {
 465         TexEnvCombine::SourceParam source = TexEnvCombine::PREVIOUS;
 466         findAttr(sourceParams, p, source);
 467         result->setSource1_RGB(source);
 468     }
 469     if ((p = getEffectPropertyChild(effect, envProp, "source2-rgb"))) {
 470         TexEnvCombine::SourceParam source = TexEnvCombine::CONSTANT;
 471         findAttr(sourceParams, p, source);
 472         result->setSource2_RGB(source);
 473     }
 474     if ((p = getEffectPropertyChild(effect, envProp, "source0-alpha"))) {
 475         TexEnvCombine::SourceParam source = TexEnvCombine::TEXTURE;
 476         findAttr(sourceParams, p, source);
 477         result->setSource0_Alpha(source);
 478     }
 479     if ((p = getEffectPropertyChild(effect, envProp, "source1-alpha"))) {
 480         TexEnvCombine::SourceParam source = TexEnvCombine::PREVIOUS;
 481         findAttr(sourceParams, p, source);
 482         result->setSource1_Alpha(source);
 483     }
 484     if ((p = getEffectPropertyChild(effect, envProp, "source2-alpha"))) {
 485         TexEnvCombine::SourceParam source = TexEnvCombine::CONSTANT;
 486         findAttr(sourceParams, p, source);
 487         result->setSource2_Alpha(source);
 488     }
 489     if ((p = getEffectPropertyChild(effect, envProp, "operand0-rgb"))) {
 490         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_COLOR;
 491         findAttr(operandParams, p, op);
 492         result->setOperand0_RGB(op);
 493     }
 494     if ((p = getEffectPropertyChild(effect, envProp, "operand1-rgb"))) {
 495         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_COLOR;
 496         findAttr(operandParams, p, op);
 497         result->setOperand1_RGB(op);
 498     }
 499     if ((p = getEffectPropertyChild(effect, envProp, "operand2-rgb"))) {
 500         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 501         findAttr(operandParams, p, op);
 502         result->setOperand2_RGB(op);
 503     }
 504     if ((p = getEffectPropertyChild(effect, envProp, "operand0-alpha"))) {
 505         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 506         findAttr(operandParams, p, op);
 507         result->setOperand0_Alpha(op);
 508     }
 509     if ((p = getEffectPropertyChild(effect, envProp, "operand1-alpha"))) {
 510         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 511         findAttr(operandParams, p, op);
 512         result->setOperand1_Alpha(op);
 513     }
 514     if ((p = getEffectPropertyChild(effect, envProp, "operand2-alpha"))) {
 515         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 516         findAttr(operandParams, p, op);
 517         result->setOperand2_Alpha(op);
 518     }
 519     if ((p = getEffectPropertyChild(effect, envProp, "scale-rgb"))) {
 520         result->setScale_RGB(p->getValue<float>());
 521     }
 522     if ((p = getEffectPropertyChild(effect, envProp, "scale-alpha"))) {
 523         result->setScale_Alpha(p->getValue<float>());
 524     }
 525 #if 0
 526     if ((p = getEffectPropertyChild(effect, envProp, "constant-color"))) {
 527         SGVec4d color = p->getValue<SGVec4d>();
 528         result->setConstantColor(toOsg(color));
 529     } else if ((p = getEffectPropertyChild(effect, envProp,
 530                                            "light-direction"))) {
 531         SGVec3d direction = p->getValue<SGVec3d>();
 532         result->setConstantColorAsLightDirection(toOsg(direction));
 533     }
 534 #endif
 535     const SGPropertyNode* colorNode = envProp->getChild("constant-color");
 536     if (colorNode)
 537         initFromParameters(effect, colorNode, result,
 538                            &TexEnvCombine::setConstantColor, colorFields);
 539     return result;
 540 }
 541
 542 EffectNameValue<TexGen::Mode> tgenModeInit[] =
 543 {
 544     { "object-linear", TexGen::OBJECT_LINEAR},
 545     { "eye-linear", TexGen::EYE_LINEAR},
 546     { "sphere-map", TexGen::SPHERE_MAP},
 547     { "normal-map", TexGen::NORMAL_MAP},
 548     { "reflection-map", TexGen::REFLECTION_MAP}
 549 };
 550
 551 EffectPropertyMap<TexGen::Mode> tgenModes(tgenModeInit);
 552
 553 EffectNameValue<TexGen::Coord> tgenCoordInit[] =
 554 {
 555     {"s", TexGen::S},
 556     {"t", TexGen::T},
 557     {"r", TexGen::R},
 558     {"q", TexGen::Q}
 559 };
 560
 561 EffectPropertyMap<TexGen::Coord> tgenCoords(tgenCoordInit);
 562
 563 TexGen* buildTexGen(Effect* effect, const SGPropertyNode* tgenProp)
 564 {
 565     if (!isAttributeActive(effect, tgenProp))
 566         return 0;
 567     TexGen* result = new TexGen;
 568     const SGPropertyNode* p = 0;
 569     TexGen::Mode mode = TexGen::OBJECT_LINEAR;
 570     if (findAttr(tgenModes, getEffectPropertyChild(effect, tgenProp, "mode"),
 571                  mode))
 572         result->setMode(mode);
 573     const SGPropertyNode* planesNode = tgenProp->getChild("planes");
 574     if (planesNode) {
 575         for (int i = 0; i < planesNode->nChildren(); ++i) {
 576             const SGPropertyNode* planeNode = planesNode->getChild(i);
 577             TexGen::Coord coord;
 578             if (!findAttr(tgenCoords, planeNode->getName(), coord)) {
 579                 SG_LOG(SG_INPUT, SG_ALERT, "Unknown TexGen plane "
 580                        << planeNode->getName());
 581             } else {
 582                 const SGPropertyNode* realNode
 583                     = getEffectPropertyNode(effect, planeNode);
 584                 SGVec4d plane = realNode->getValue<SGVec4d>();
 585                 result->setPlane(coord, toOsg(plane));
 586             }
 587         }
 588     }
 589     return result;
 590 }
 591
 592 bool makeTextureParameters(SGPropertyNode* paramRoot, const StateSet* ss)
 593 {
 594     SGPropertyNode* texUnit = makeChild(paramRoot, "texture");
 595     const Texture* tex = getStateAttribute<Texture>(0, ss);
 596     const Texture2D* texture = dynamic_cast<const Texture2D*>(tex);
 597     makeChild(texUnit, "unit")->setValue(0);
 598     if (!tex) {
 599         // The default shader-based technique ignores active
 600         makeChild(texUnit, "active")->setValue(false);
 601         return false;
 602     }
 603     const Image* image = texture->getImage();
 604     string imageName;
 605     if (image) {
 606         imageName = image->getFileName();
 607     } else {
 608         makeChild(texUnit, "active")->setValue(false);
 609         makeChild(texUnit, "type")->setValue("white");
 610         return false;
 611     }
 612     makeChild(texUnit, "active")->setValue(true);
 613     makeChild(texUnit, "type")->setValue("2d");
 614     string wrapS = findName(wrapModes, texture->getWrap(Texture::WRAP_S));
 615     string wrapT = findName(wrapModes, texture->getWrap(Texture::WRAP_T));
 616     string wrapR = findName(wrapModes, texture->getWrap(Texture::WRAP_R));
 617     makeChild(texUnit, "image")->setStringValue(imageName);
 618     makeChild(texUnit, "wrap-s")->setStringValue(wrapS);
 619     makeChild(texUnit, "wrap-t")->setStringValue(wrapT);
 620     makeChild(texUnit, "wrap-r")->setStringValue(wrapR);
 621     return true;
 622 }
 623
 624 }