int main()
{
osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer();
unsigned tex_width = 1024;
unsigned tex_height = 512;
osg::Camera::RenderTargetImplementation renderImplementation = osg::Camera::FRAME_BUFFER_OBJECT;
bool useImage = true;
//读取模型
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFile("../OSGData/cessna.osg");
//创建一个transform节点,用来选装该子场景
osg::ref_ptr<osg::MatrixTransform> loadedModelTransform = new osg::MatrixTransform;
loadedModelTransform->addChild(loadedModel.get());
//设置更新回调
osg::ref_ptr<osg::NodeCallback> nc = new osg::AnimationPathCallback(loadedModelTransform->getBound().center(),osg::Vec3(0.0f,0.0f,1.0f),osg::inDegrees(45.0f));
loadedModelTransform->setUpdateCallback(nc);
osg::ref_ptr<osg::Group> rootNode = new osg::Group();
rootNode->addChild(createPreRenderSubGraph(loadedModelTransform.get(),tex_width,tex_height, renderImplementation, useImage));
//优化场景数据
osgUtil::Optimizer optimizer ;
optimizer.optimize(rootNode.get());
viewer->setSceneData(rootNode.get());
viewer->realize();
viewer->run();
return 0 ;
}
// constructor
MyFsoiObj(const char* filename,
double scale,
const char *skybox_basename,
double im_xang,
double im_yang,
double nearclip,
double farclip,
unsigned tex_width=64,
unsigned tex_height=64,
//osg::Camera::RenderTargetImplementation renderImplementation = osg::Camera::FRAME_BUFFER_OBJECT,
osg::Camera::RenderTargetImplementation renderImplementation = osg::Camera::FRAME_BUFFER,
bool useTextureRectangle = false,
bool useHDR = false
) {
DPRINTF("constructor called\n");
bool useImage = true;
osg::Node* loadedModel = NULL;
osg::MatrixTransform* loadedModelTransform = new osg::MatrixTransform;
std::vector<std::string> filenames = std::vector<std::string>();
if (filename==NULL) {
fprintf(stderr,"no filename specified in MyFsoiObj constructor (%s,%d)\n",__FILE__,__LINE__);
loadedModel = new osg::Node();
} else {
filenames.push_back( std::string(filename) );
loadedModel = osgDB::readNodeFiles(filenames);
if (!loadedModel)
{
DPRINTF("Aborting: could not load files\n");
exit(2);
}
loadedModelTransform->addChild(loadedModel);
}
#define SEIZE_CAMERA
#ifdef SEIZE_CAMERA
DPRINTF("setting scale to %f.\n",scale);
loadedModelTransform->setMatrix( osg::Matrix::scale(scale,scale,scale) );
#else
// spin the model.
osg::NodeCallback* nc = new osg::AnimationPathCallback(loadedModelTransform->getBound().center(),osg::Vec3(0.0f,0.0f,1.0f),osg::inDegrees(45.0f));
loadedModelTransform->setUpdateCallback(nc);
#endif
prerender_image = new osg::Image;
DPRINTF("allocating image...\n");
prerender_image->allocateImage(tex_width, tex_height, 1, GL_RGBA, GL_UNSIGNED_BYTE);
//prerender_image->allocateImage(tex_width, tex_height, 1, GL_RGB, GL_UNSIGNED_BYTE);
DPRINTF("allocated (%dx%d) OK.\n",tex_width,tex_height);
//image->allocateImage(tex_width, tex_height, 1, GL_RGBA, GL_FLOAT);
prerender_camera = new osg::Camera;
model_and_sky = new osg::Group();
#ifdef USE_SKYBOX
if (skybox_basename) {
osg::ref_ptr<osg::ClearNode> skybox_node = new osg::ClearNode();
std::string basedir = std::string(skybox_basename);
// weird step to prevent strlen symbol lookup problem on Ubuntu Feisty
std::string px = std::string(basedir+"posx.png");
std::string nx = std::string(basedir+"negx.png");
std::string ny = std::string(basedir+"negy.png");
std::string py = std::string(basedir+"posy.png");
std::string pz = std::string(basedir+"posz.png");
std::string nz = std::string(basedir+"negz.png");
add_skybox_to_node( skybox_node, px, nx, ny,py, pz,nz);
model_and_sky->addChild( skybox_node.get() );
}
#else
if (skybox_basename) {
fprintf(stderr,"error: requested skybox, but support not compiled in %s:%d\n",__FILE__,__LINE__);
}
#endif
model_and_sky->addChild( loadedModelTransform );
rootNode = new osg::Group();
rootNode->addChild(createPreRenderSubGraph(model_and_sky,tex_width,tex_height, renderImplementation, useImage, useTextureRectangle, useHDR, prerender_image.get(), prerender_camera.get()));
#ifdef SEIZE_CAMERA
// set camera properties (re-setting what was done in createPreRenderSubGraph)
prerender_camera->setProjectionMatrixAsPerspective( im_yang, (im_xang/im_yang), nearclip, farclip);
#endif
// add model to the viewer.
viewer.setSceneData( rootNode.get() );
#if 1
// render to window (not fullscreen)
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->x = 0;
traits->y = 0;
traits->width = 640;
traits->height = 480;
traits->red = 8;
traits->green = 8;
traits->blue = 8;
traits->alpha = 8;
traits->depth = 32;
traits->windowDecoration = true;
traits->doubleBuffer = true;
//traits->doubleBuffer = false;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
osg::ref_ptr<osg::Camera> camera = viewer.getCamera();
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0, traits->width, traits->height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
// set background color
camera->setClearColor(osg::Vec4(0.0f,0.0f,0.0f,1.0f));
camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#endif
viewer.setKeyEventSetsDone(0); // disable keypress from quitting
viewer.setQuitEventSetsDone(false); // disable quit event from quitting (XXX seems broken as of 2007-06-27)
if (!viewer.getCameraManipulator() && viewer.getCamera()->getAllowEventFocus())
{
viewer.setCameraManipulator(new osgGA::TrackballManipulator());
// viewer.setCameraManipulator(new osgGA::MatrixManipulator());
}
if (!viewer.isRealized()) {
viewer.realize();
}
addEyeMap(0);
addEyeMap(1);
DPRINTF("constructor finished\n");
}
