// Initialize GLUT & OpenSG and set up the scene
int main(int argc, char **argv)
{
// OSG init
OSG::osgInit(argc,argv);
gScene = OSG::GroupNodeRefPtr::create();
if (argc < 2)
{
std::cout << "Specify a directory to load models from." << std::endl;
gScene = static_cast<OSG::Node *>(NULL);
OSG::osgExit();
exit(-1);
}
findModels(std::string(argv[1]));
// Start the background loader.
OSG::BackgroundLoader::the()->start();
// GLUT init
int winid = setupGLUT(&argc, argv);
// the connection between GLUT and OpenSG
OSG::GLUTWindowUnrecPtr gwin= OSG::GLUTWindow::create();
gwin->setGlutId(winid);
gwin->init();
// create the SimpleSceneManager helper
mgr = new OSG::SimpleSceneManager;
// tell the manager what to manage
mgr->setWindow(gwin );
mgr->setRoot (gScene.node());
// show the whole scene
mgr->showAll();
// GLUT main loop
glutMainLoop();
OSG::BackgroundLoader::the()->stop();
return 0;
}
void initPlaneSetup(void)
{
// beacon for camera and light
OSG::GroupNodeRefPtr beacon = OSG::GroupNodeRefPtr::create();
// transformation
OSG::TransformNodeRefPtr cam_transPlane =
OSG::TransformNodeRefPtr::create();
cam_transPlane.node()->addChild(beacon);
// light
OSG::DirectionalLightNodeRefPtr dl =
OSG::DirectionalLightNodeRefPtr::create();
dl->setAmbient (.3f, .3f, .3f, 1);
dl->setDiffuse ( 1, 1, 1, 1);
dl->setDirection( 0, 0, 1 );
dl->setBeacon (beacon );
// planeRoot
planeRoot = OSG::GroupNodeRefPtr::create();
planeRoot.node()->addChild(cam_transPlane);
planeRoot.node()->addChild(animRoot);
planeRoot.node()->addChild(dl);
// Create plane to project the staged render
OSG::NodeUnrecPtr plane_node = OSG::makePlane(10, 10, 5, 5);
// Setup the shared texture and texture environment
// - Create an empty image so texture can allocate size and memory
OSG::ImageUnrecPtr pImg = OSG::Image::create();
pImg->set(OSG::Image::OSG_RGB_PF, 512, 512);
tx1o->setImage (pImg );
tx1o->setMinFilter(GL_LINEAR );
tx1o->setMagFilter(GL_LINEAR );
tx1o->setWrapS (GL_REPEAT );
tx1o->setWrapT (GL_REPEAT );
tx1e->setEnvMode (GL_REPLACE);
#ifdef USE_DEPTH_TEXTURE
OSG::ImageUnrecPtr dImg = OSG::Image::create();
dImg->set(Image::OSG_L_PF, 512, 512);
txDepth->setImage (dImg);
txDepth->setMinFilter(GL_NEAREST );
txDepth->setMagFilter(GL_LINEAR );
txDepth->setWrapS (GL_CLAMP_TO_EDGE );
txDepth->setWrapT (GL_CLAMP_TO_EDGE );
txDepth->setExternalFormat(GL_DEPTH_COMPONENT);
txDepth->setInternalFormat(GL_DEPTH_COMPONENT32);
#endif
// Material for plane
// - Create a material that will reference the texture and render
// it on the plane
OSG::SimpleMaterialUnrecPtr mat = OSG::SimpleMaterial::create();
mat->setDiffuse(OSG::Color3f(1,1,1));
mat->setLit (false );
#ifdef USE_DEPTH_TEXTURE
mat->addChunk (txDepth );
#else
mat->addChunk (tx1o );
#endif
mat->addChunk (tx1e );
OSG::GeometryUnrecPtr pGeo =
dynamic_cast<OSG::Geometry *>(plane_node->getCore());
pGeo->setMaterial(mat);
// Finish connecting graph
OSG::TransformNodeRefPtr scene_trans = OSG::TransformNodeRefPtr::create();
scene_trans.node()->addChild(plane_node );
dl.node()->addChild(scene_trans);
}
void findModels(std::string dirname)
{
fs::path dir_path(dirname);
if (!fs::exists(dir_path))
{
std::cerr << "ERROR: path does not exist: " << dirname << std::endl;
gScene = static_cast<OSG::Node *>(NULL);
OSG::osgExit();
exit(-1);
}
fs::directory_iterator end_itr;
for(fs::directory_iterator itr(dir_path); itr != end_itr; ++itr)
{
if(!fs::is_directory(*itr))
{
if (fs::extension(*itr) == std::string(".osb") ||
fs::extension(*itr) == std::string(".wrl"))
{
fs::path complete_file = fs::complete(*itr);
std::string filename(complete_file.string());
std::cout << "Found file: " << filename << std::endl;
OSG::ModelRequestPtr req = OSG::ModelRequest::create()->init(OSG::NodeRefPtr(gScene.node()), filename);
OSG::BackgroundLoader::the()->addRequest(req);
}
}
}
}
// Setup the part of the scene rooted at animRoot
// This includes a file to animate, a beacon for a light,
// and a staged core to render this subtree from the position
// of the light.
void initAnimSetup(int argc, char **argv)
{
// beacon for light and stage camera
OSG::GroupNodeRefPtr beacon = OSG::GroupNodeRefPtr::create();
// transformation for beacon
cam_transScene = OSG::TransformNodeRefPtr::create();
cam_transScene.node()->addChild(beacon);
// light
OSG::DirectionalLightNodeRefPtr dlight =
OSG::DirectionalLightNodeRefPtr::create();
dlight->setAmbient (.3f, .3f, .3f, 1);
dlight->setDiffuse ( 1, 1, 1, 1);
dlight->setDirection( 0, 0, 1 );
dlight->setBeacon (beacon );
// animRoot
animRoot = OSG::GroupNodeRefPtr::create();
animRoot.node()->addChild(cam_transScene );
// Load the file and put it in the graph
// under the sceneXform node.
OSG::NodeUnrecPtr file = NULL;
if(argc > 1)
{ file = OSG::SceneFileHandler::the()->read(argv[1]); }
if(file == NULL)
{
std::cerr << "Couldn't load file, ignoring" << std::endl;
file = OSG::makeTorus(.5, 2, 16, 16);
}
OSG::Vec3f min,max;
OSG::commitChanges();
file->updateVolume();
file->dump();
file->getVolume().getBounds(min, max);
std::cout << "Volume: from " << min << " to " << max << std::endl;
sceneTrans.setValues(min[0] + ((max[0] - min[0]) * 0.5),
min[1] + ((max[1] - min[1]) * 0.5),
max[2] + ( max[2] - min[2]) * 4.5 );
sceneXform = OSG::TransformNodeRefPtr::create();
sceneXform.node()->addChild(file);
OSG::NodeUnrecPtr pBoxNode = OSG::makeBox(1, 1, 1, 5, 5, 5);
pBoxNode->setTravMask(pBoxNode->getTravMask() & 0x0001);
sceneXform.node()->addChild(pBoxNode);
dlight.node()->addChild(sceneXform);
// ---- STAGE RENDERING SETUP --- //
// Camera: setup camera to point from beacon (light pos)
// with a 90deg FOV to render the scene
OSG::PerspectiveCameraUnrecPtr stage_cam = OSG::PerspectiveCamera::create();
stage_cam->setBeacon(beacon);
stage_cam->setFov (OSG::osgDegree2Rad(90));
stage_cam->setNear (0.1f);
stage_cam->setFar (100000);
// Background
OSG::SolidBackgroundUnrecPtr bkgnd = OSG::SolidBackground::create();
bkgnd->setColor(OSG::Color3f(0,1,0));
// FBO setup
pFBO = OSG::FrameBufferObject::create();
pTexBuffer = OSG::TextureBuffer::create();
#ifdef USE_DEPTH_TEXTURE
OSG::TextureBufferUnrecPtr pDepthBuffer = OSG::TextureBuffer::create();
pDepthBuffer->setTexture(txDepth);
#else
OSG::RenderBufferUnrecPtr pDepthBuffer = OSG::RenderBuffer ::create();
pDepthBuffer->setInternalFormat(GL_DEPTH_COMPONENT24 );
#endif
pTexBuffer->setTexture (tx1o);
pTexBuffer->setReadBack(true);
pFBO->setSize(512, 512);
pFBO->setColorAttachment(pTexBuffer, 0);
pFBO->setDepthAttachment(pDepthBuffer );
pFBO->editMFDrawBuffers()->clear();
pFBO->editMFDrawBuffers()->push_back(GL_COLOR_ATTACHMENT0_EXT);
// Stage core setup
OSG::SimpleStageNodeRefPtr pStage = OSG::SimpleStageNodeRefPtr::create();
pStage->setRenderTarget(pFBO );
pStage->setCamera (stage_cam );
pStage->setBackground (bkgnd);
pStage->addPreRenderFunctor (&testPreRenderCB, "" );
pStage->addPostRenderFunctor(&testPostRenderCB, "");
// Setup sub-tree visitor
// - This will setup a graph that will render a subtree during traversal
pVisit = OSG::VisitSubTreeNodeRefPtr::create();
pVisit->setSubTreeRoot(dlight);
pStage.node()->addChild(pVisit);
animRoot.node()->addChild(pStage);
animRoot.node()->addChild(dlight);
}
