osgcubemap.zip_osg

/* OpenSceneGraph example, osgcubemap. * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include <osg/Group> #include <osg/StateSet> #include <osg/TextureCubeMap> #include <osg/TexGen> #include <osg/TexEnvCombine> #include <osgUtil/ReflectionMapGenerator> #include <osgUtil/HighlightMapGenerator> #include <osgUtil/HalfWayMapGenerator> #include <osgUtil/Optimizer> #include <osgDB/ReadFile> #include <osgDB/Registry> #include <osgGA/TrackballManipulator> #include <osgGA/FlightManipulator> #include <osgGA/DriveManipulator> #include <osgViewer/Viewer> #include <iostream> #include <string> #include <vector> void create_specular_highlights(osg::Node *node) { osg::StateSet *ss = node->getOrCreateStateSet(); // create and setup the texture object osg::TextureCubeMap *tcm = new osg::TextureCubeMap; tcm->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP); tcm->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP); tcm->setWrap(osg::Texture::WRAP_R, osg::Texture::CLAMP); tcm->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR); tcm->setFilter(osg::Texture::MAG_FILTER, osg::Texture::LINEAR); // generate the six highlight map images (light direction = [1, 1, -1]) osgUtil::HighlightMapGenerator *mapgen = new osgUtil::HighlightMapGenerator( osg::Vec3(1, 1, -1), // light direction osg::Vec4(1, 0.9f, 0.8f, 1), // light color 8); // specular exponent mapgen->generateMap(); // assign the six images to the texture object tcm->setImage(osg::TextureCubeMap::POSITIVE_X, mapgen->getImage(osg::TextureCubeMap::POSITIVE_X)); tcm->setImage(osg::TextureCubeMap::NEGATIVE_X, mapgen->getImage(osg::TextureCubeMap::NEGATIVE_X)); tcm->setImage(osg::TextureCubeMap::POSITIVE_Y, mapgen->getImage(osg::TextureCubeMap::POSITIVE_Y)); tcm->setImage(osg::TextureCubeMap::NEGATIVE_Y, mapgen->getImage(osg::TextureCubeMap::NEGATIVE_Y)); tcm->setImage(osg::TextureCubeMap::POSITIVE_Z, mapgen->getImage(osg::TextureCubeMap::POSITIVE_Z)); tcm->setImage(osg::TextureCubeMap::NEGATIVE_Z, mapgen->getImage(osg::TextureCubeMap::NEGATIVE_Z)); // enable texturing, replacing any textures in the subgraphs ss->setTextureAttributeAndModes(0, tcm, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON); // texture coordinate generation osg::TexGen *tg = new osg::TexGen; tg->setMode(osg::TexGen::REFLECTION_MAP); ss->setTextureAttributeAndModes(0, tg, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON); // use TexEnvCombine to add the highlights to the original lighting osg::TexEnvCombine *te = new osg::TexEnvCombine; te->setCombine_RGB(osg::TexEnvCombine::ADD); te->setSource0_RGB(osg::TexEnvCombine::TEXTURE); te->setOperand0_RGB(osg::TexEnvCombine::SRC_COLOR); te->setSource1_RGB(osg::TexEnvCombine::PRIMARY_COLOR); te->setOperand1_RGB(osg::TexEnvCombine::SRC_COLOR); ss->setTextureAttributeAndModes(0, te, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON); } int main(int argc, char *argv[]) { // use an ArgumentParser object to manage the program arguments. osg::ArgumentParser arguments(&argc,argv); // construct the viewer. osgViewer::Viewer viewer; // load the nodes from the commandline arguments. osg::Node* rootnode = osgDB::readNodeFiles(arguments); // if not loaded assume no arguments passed in, try use default mode instead. if (!rootnode) rootnode = osgDB::readNodeFile("cessna.osgt"); if (!rootnode) { osg::notify(osg::NOTICE)<<"Please specify a model filename on the command line."<<std::endl; return 1; } // create specular highlights create_specular_highlights(rootnode); // run optimization over the scene graph osgUtil::Optimizer optimzer; optimzer.optimize(rootnode); // add a viewport to the viewer and attach the scene graph. viewer.setSceneData(rootnode); // create the windows and run the threads. viewer.realize(); // now check to see if texture cube map is supported. for(unsigned int contextID = 0; contextID<osg::DisplaySettings::instance()->getMaxNumberOfGraphicsContexts(); ++contextID) { osg::TextureCubeMap::Extensions* tcmExt = osg::TextureCubeMap::getExtensions(contextID,false); if (tcmExt) { if (!tcmExt->isCubeMapSupported()) { std::cout<<"Warning: texture_cube_map not supported by OpenGL drivers, unable to run application."<<std::endl; return 1; } } } return viewer.run(); }