readerwritervrml2.cpp

最新osg包

                const openvrml::vrml97_node::material_node *vrml_material =
                    dynamic_cast<const openvrml::vrml97_node::material_node *>(vrml_material_node.get());
                //              std::cerr << "sfnode->Material OK" << std::endl << std::flush;

                if (vrml_material != NULL) 
                {
                    osg_mat->setAmbient(osg::Material::FRONT_AND_BACK, 
                                        osg::Vec4(vrml_material->ambient_intensity(),
                                                  vrml_material->ambient_intensity(),
                                                  vrml_material->ambient_intensity(),
                                                  1.0));
                    osg_mat->setDiffuse(osg::Material::FRONT_AND_BACK, 
                                        osg::Vec4(vrml_material->diffuse_color().r(),
                                                  vrml_material->diffuse_color().g(),
                                                  vrml_material->diffuse_color().b(),
                                                  1.0));
                    osg_mat->setEmission(osg::Material::FRONT_AND_BACK, 
                                         osg::Vec4(vrml_material->emissive_color().r(),
                                                   vrml_material->emissive_color().g(),
                                                   vrml_material->emissive_color().b(),
                                                   1.0));
                    osg_mat->setSpecular(osg::Material::FRONT_AND_BACK, 
                                         osg::Vec4(vrml_material->specular_color().r(),
                                                   vrml_material->specular_color().g(),
                                                   vrml_material->specular_color().b(),
                                                   1.0));

                    osg_mat->setShininess(osg::Material::FRONT_AND_BACK, vrml_material->shininess() );

                    if (vrml_material->transparency() > 0.0f)
                    {
                        osg_mat->setTransparency(osg::Material::FRONT_AND_BACK, vrml_material->transparency());
                        osg_stateset->setMode(GL_BLEND, osg::StateAttribute::ON); 
                        osg_stateset->setAttribute(new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false)); // GvdB: transparent objects do not write depth
                        osg_stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
                    }
                    else
                    {
                        osg_stateset->setMode(GL_BLEND, osg::StateAttribute::OFF);  
                        osg_stateset->setRenderingHint(osg::StateSet::OPAQUE_BIN);
                    }

                    osg_stateset->setAttributeAndModes(osg_mat.get());

                }

                const openvrml::vrml97_node::image_texture_node *vrml_texture =
                    dynamic_cast<const openvrml::vrml97_node::image_texture_node *>(vrml_texture_node.get());
                //              std::cerr << "TextureNode -> ImageTexture OK" << std::endl << std::flush;

                // if texture is provided
                if (vrml_texture != 0) {
                    const openvrml::field_value &texture_url_fv = vrml_texture->field("url");
                    const openvrml::mfstring &mfs = dynamic_cast<const openvrml::mfstring &>(texture_url_fv);
                    //              std::cerr << "Texture URL FV -> mfstring OK" << std::endl << std::flush;

                    const std::string &url = mfs.value[0];

                    osg::ref_ptr<osg::Image> image = osgDB::readImageFile(url);

                    if (image != 0) {
                        osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D;
                        texture->setImage(image.get());

                        // defaults
                        texture->setWrap(osg::Texture::WRAP_S, osg::Texture::REPEAT);
                        texture->setWrap(osg::Texture::WRAP_R, osg::Texture::REPEAT);
                        texture->setWrap(osg::Texture::WRAP_T, osg::Texture::REPEAT);

                        // get the real texture wrapping parameters (if any)

                        try {
                            const openvrml::field_value &wrap_fv = vrml_texture->field("repeatS");
                            const openvrml::sfbool &sfb = dynamic_cast<const openvrml::sfbool &>(wrap_fv);

                            if (!sfb.value) {
                                texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP);
                            }
                        } catch (...) {
                            // nothing specified
                        }

                        try {
                            const openvrml::field_value &wrap_fv = vrml_texture->field("repeatT");
                            const openvrml::sfbool &sfb = dynamic_cast<const openvrml::sfbool &>(wrap_fv);

                            if (!sfb.value) {
                                texture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP);
                            }
                        } catch (...) {
                            // nothing specified
                        }

                        osg_stateset->setTextureAttributeAndModes(0, texture.get());
                        //osg_stateset->setMode(GL_BLEND,osg::StateAttribute::ON);  //bhbn

                    } 
                    else {
                        std::cerr << "texture file " << url << " not found !" << std::endl << std::flush;
                    }
                }
            }
        }

        return osg_geode.get();
    } 
    else 
    {
        return 0;
    }

    /*
       } else if(obj->type.id == "DirectionalLight")    // Handle lights
       {
           osg::Group* lightGroup = new osg::Group;

           openvrml::vrml97_node::directional_light_node *vrml_light;
           vrml_light = dynamic_cast<openvrml::vrml97_node::directional_light_node *>(obj);

           // create light with global params
           osg::Light* myLight = new osg::Light;
           myLight->setLightNum(osgLightNum);
           myLight->setAmbient(osg::Vec4(vrml_light->ambient_intensity(),vrml_light->ambient_intensity(),vrml_light->ambient_intensity(),vrml_light->ambient_intensity()));
           float osgR = vrml_light->color().r()*vrml_light->intensity();
           float osgG = vrml_light->color().g()*vrml_light->intensity();
           float osgB = vrml_light->color().b()*vrml_light->intensity();
           myLight->setDiffuse(osg::Vec4(osgR, osgG, osgB, 1.0f));
           myLight->setSpecular(osg::Vec4(osgR, osgG, osgB, 1.0f));
           
           // configure light as DIRECTIONAL
           openvrml::sfvec3f &dir = vrml_light->direction_;
           myLight->setDirection(osg::Vec3(dir.value[0],dir.value[1],dir.value[2]));
           myLight->setPosition(osg::Vec4(dir.value[0],dir.value[1],dir.value[2], 0.0f));
           
           // add the light in the scenegraph
           osg::LightSource* lightS = new osg::LightSource;        
           lightS->setLight(myLight);
           if (vrml_light->on()) {
        lightS->setLocalStateSetModes(osg::StateAttribute::ON); 
        //lightS->setStateSetModes(*rootStateSet,osg::StateAttribute::ON);  
           }
           
           lightGroup->addChild(lightS);
           osgLightNum++;

           return lightGroup;

       } else if(obj->type.id == "PointLight")    // Handle lights
       {
           osg::Group* lightGroup = new osg::Group;

           openvrml::vrml97_node::point_light_node *vrml_light;
           vrml_light = dynamic_cast<openvrml::vrml97_node::point_light_node *>(obj);

           // create light with global params
           osg::Light* myLight = new osg::Light;
           myLight->setLightNum(osgLightNum);
           //std::cout<<"lightnum = "<<osgLightNum;
           
           openvrml::sfvec3f &pos = vrml_light->location_;
           myLight->setPosition(osg::Vec4(pos.value[0], pos.value[1], pos.value[2], 1.0f));
           
           myLight->setAmbient(osg::Vec4(vrml_light->ambient_intensity(),vrml_light->ambient_intensity(),vrml_light->ambient_intensity(),vrml_light->ambient_intensity()));
           float osgR = vrml_light->color().r()*vrml_light->intensity();
           float osgG = vrml_light->color().g()*vrml_light->intensity();
           float osgB = vrml_light->color().b()*vrml_light->intensity();
           myLight->setDiffuse(osg::Vec4(osgR, osgG, osgB, 1.0f));
           myLight->setSpecular(osg::Vec4(osgR, osgG, osgB, 1.0f));
           
           // configure light as POINT
           myLight->setDirection(osg::Vec3(0.f,0.f,0.f));
           
           // add the light in the scenegraph
           osg::LightSource* lightS = new osg::LightSource;        
           lightS->setLight(myLight);
           if (vrml_light->on()) {
        lightS->setLocalStateSetModes(osg::StateAttribute::ON); 
        //lightS->setStateSetModes(*rootStateSet,osg::StateAttribute::ON);  
           }
           
           lightGroup->addChild(lightS);
           osgLightNum++;

           return lightGroup;

       } else if(obj->type.id == "SpotLight")    // Handle lights
       {
           osg::Group* lightGroup = new osg::Group;

           openvrml::vrml97_node::spot_light_node *vrml_light;
           vrml_light = dynamic_cast<openvrml::vrml97_node::spot_light_node *>(obj);

           // create light with global params
           osg::Light* myLight = new osg::Light;
           myLight->setLightNum(osgLightNum);
           myLight->setPosition(osg::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
           myLight->setAmbient(osg::Vec4(vrml_light->ambient_intensity(),vrml_light->ambient_intensity(),vrml_light->ambient_intensity(),vrml_light->ambient_intensity()));
           float osgR = vrml_light->color().r()*vrml_light->intensity();
           float osgG = vrml_light->color().g()*vrml_light->intensity();
           float osgB = vrml_light->color().b()*vrml_light->intensity();
           myLight->setDiffuse(osg::Vec4(osgR, osgG, osgB, 1.0f));
           myLight->setSpecular(osg::Vec4(osgR, osgG, osgB, 1.0f));
           
           // configure light as SPOT 
           openvrml::sfvec3f &dir = vrml_light->direction_;
           myLight->setDirection(osg::Vec3(dir.value[0],dir.value[1],dir.value[2]));
           
           // The cutOff value in osg ranges from 0 to 90, we need
           // to divide by 2 to avoid openGL error.
           //      myLight->setSpotCutoff(ls.fallsize/2.0f);
           // The bigger the differens is between fallsize and hotsize
           // the bigger the exponent should be.
           //      float diff = ls.fallsize - ls.hotsize;
           //      myLight->setSpotExponent(diff);
           
           // add the light in the scenegraph
           osg::LightSource* lightS = new osg::LightSource;        
           lightS->setLight(myLight);
           if (vrml_light->on()) {
        lightS->setLocalStateSetModes(osg::StateAttribute::ON); 
        //lightS->setStateSetModes(*rootStateSet,osg::StateAttribute::ON);  
           }
           
           lightGroup->addChild(lightS);
           osgLightNum++;

           return lightGroup;

       }  else {

    return NULL;
       }
    */
}