Wednesday, January 27 2010 @ 06:37 AM EST

Hi, I have an application that uses Delta3D. The map is correctly loaded, and everyting seems to work fine. However, I have a problem: Some textures are only loaded when the camera poits at them. Is there a way to load every textures before starting to navigate in a virutal environment? Best regards, Alex.

Wednesday, January 27 2010 @ 08:43 AM EST

you have to compile all the object in the scene at the beginning of the program if you dont want any compilation on viewing... i will give you the code we use in our programs: class CompileGLObjectsCallback : public osg::Operation { public: CompileGLObjectsCallback(osg::Node* node): osg::Operation("CompileStateCallback", false), _scene(node) {} virtual void operator () (osg::Object* object) { osg::GraphicsContext* context = dynamic_cast<osg::GraphicsContext*>(object); if (!context) return; if (_scene) { compileTextureObjects(_scene, context->getState()); osgUtil::GLObjectsVisitor compile; compile.setMode(osgUtil::GLObjectsVisitor::Mode(osgUtil::GLObjectsVisitor::COMPILE_DISPLAY_LISTS | osgUtil::GLObjectsVisitor::COMPILE_STATE_ATTRIBUTES | osgUtil::GLObjectsVisitor::SWITCH_ON_DISPLAY_LISTS | osgUtil::GLObjectsVisitor::SWITCH_ON_VERTEX_BUFFER_OBJECTS | osgUtil::GLObjectsVisitor::CHECK_BLACK_LISTED_MODES )); compile.setState(context->getState()); compile.apply(*_scene); } } void compileTextureObjects(osg::Node* node, osg::State* state) { osg::ref_ptr<osg::Geode> geode = dynamic_cast<osg::Geode*>(node); if ( geode != NULL ) { for(unsigned int j = 0; j < geode->getNumDrawables(); j++) { for(unsigned int i = 0; i < 8; i++) { osg::Texture2D* textureAttribute = static_cast<osg::Texture2D*>geode-> getOrCreateStateSet()->getTextureAttribute(i, osg::StateAttribute::TEXTURE)); if (textureAttribute != NULL) { textureAttribute->compileGLObjects(*state); } } } } osg::ref_ptr<osg::Group> group = dynamic_cast<osg::Group*>(node); if ( group != NULL ) { for (unsigned int i = 0; i < group->getNumChildren(); i++) { compileTextureObjects(group->getChild(i), state); } } } osg::Node* _scene; }; in application we use like: void Application::compileGLObjects(osg::Node* node) { CompileGLObjectsCallback* compile = new CompileGLObjectsCallback(node); osgViewer::CompositeViewer* viewer = GetCompositeViewer(); for (unsigned int i = 0; i < viewer->getNumViews(); i++) { osg::View* view = viewer->getView(i); if (view->getCamera()->getNodeMask() != 0) { view->getCamera()->getGraphicsContext()->add(compile); } } } sorry, since i use the code a little different, i have to change for you. it may not work directly but i gave the main idea... here we give sceneNode to compileGLObjects than there is no loading textures after starting the frame.

Ufuk Gün

Monday, February 08 2010 @ 09:06 PM EST

Is there a way to use these functions by converting a dtCore::Object into a osg::Node? That's because I'm loading the osg map into a dtCore::Object, and I believe that it converts all osg nodes into dtCore nodes. ...Or is there another solution? Regards.

Tuesday, February 09 2010 @ 02:56 AM EST

all dtCore::Object stores an osg::Node inside. dtCore::Drawable => it has a member osg::Node ^ | dtCore::Transformable ^ | dtCore::Object you can just call GetOSGNode() function on dtCore::Object to get osg::Node

Ufuk Gün