OSGTextNode::OSGTextNode(QObject *parent) :
osgQtQuick::OSGNode(parent),
h(new Hidden)
{
osg::ref_ptr<osgText::Font> textFont = createFont(QFont("Times"));
h->text = createText(osg::Vec3(-100, 20, 0),
"The osgQtQuick :-)\n"
"И даже по русски!",
20.0f,
textFont.get());
osg::ref_ptr<osg::Geode> textGeode = new osg::Geode();
h->text->setColor(osg::Vec4(0.0f, 1.0f, 0.0f, 1.0f));
textGeode->addDrawable(h->text.get());
#if 0
h->text->setAutoRotateToScreen(true);
setNode(textGeode.get());
#else
osg::Camera *camera = createHUDCamera(-100, 100, -100, 100);
camera->addChild(textGeode.get());
camera->getOrCreateStateSet()->setMode(
GL_LIGHTING, osg::StateAttribute::OFF);
setNode(camera);
#endif
}
void OculusViewConfig::configure(osgViewer::View& view) const
{
m_device->setNearClip(m_nearClip);
m_device->setFarClip(m_farClip);
m_device->setSensorPredictionEnabled(m_useSensorPrediction);
m_device->setSensorPredictionDelta(m_predictionDelta);
if (m_useCustomScaleFactor) {
m_device->setCustomScaleFactor(m_customScaleFactor);
}
// Create screen with match the Oculus Rift resolution
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi) {
osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}
// Get the screen identifiers set in environment variable DISPLAY
osg::GraphicsContext::ScreenIdentifier si;
si.readDISPLAY();
// If displayNum has not been set, reset it to 0.
if (si.displayNum < 0) si.displayNum = 0;
// If screenNum has not been set, reset it to 0.
if (si.screenNum < 0) si.screenNum = 0;
//test by Shao
si.displayNum = _displayNum;
si.screenNum = _screenNum;
unsigned int width, height;
wsi->getScreenResolution(si, width, height);
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->hostName = si.hostName;
traits->screenNum = si.screenNum;
traits->displayNum = si.displayNum;
traits->windowDecoration = false;
traits->x = 0;
traits->y = 0;
traits->width = m_device->hScreenResolution();
traits->height = m_device->vScreenResolution();
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->vsync = true; // VSync should always be enabled for Oculus Rift applications
// Create a graphic context based on our desired traits
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits);
if (!gc) {
osg::notify(osg::NOTICE) << "Error, GraphicsWindow has not been created successfully" << std::endl;
return;
}
_main_camera = view.getCamera();
_main_camera->setName("Main");
// Disable scene rendering for main camera
_main_camera->setCullMask(~m_sceneNodeMask);
_main_camera->setGraphicsContext(gc);
// Use full view port
_main_camera->setViewport(new osg::Viewport(0, 0, traits->width, traits->height));
// Disable automatic computation of near and far plane on main camera, will propagate to slave cameras
_main_camera->setComputeNearFarMode( osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR );
const int textureWidth = m_device->scaleFactor() * m_device->hScreenResolution()/2;
const int textureHeight = m_device->scaleFactor() * m_device->vScreenResolution();
// master projection matrix
_main_camera->setProjectionMatrix(m_device->projectionCenterMatrix());
// Create textures for RTT cameras
osg::ref_ptr<osg::Texture2D> textureLeft = new osg::Texture2D;
textureLeft->setTextureSize( textureWidth, textureHeight );
textureLeft->setInternalFormat( GL_RGBA );
osg::ref_ptr<osg::Texture2D> textureRight = new osg::Texture2D;
textureRight->setTextureSize( textureWidth, textureHeight );
textureRight->setInternalFormat( GL_RGBA );
// Create RTT (Rendering to Texture) cameras and attach textures
osg::ref_ptr<osg::Camera> cameraRTTLeft = createRTTCamera(textureLeft, gc);
osg::ref_ptr<osg::Camera> cameraRTTRight = createRTTCamera(textureRight, gc);
cameraRTTLeft->setName("LeftRTT");
cameraRTTRight->setName("RightRTT");
cameraRTTLeft->setCullMask(m_sceneNodeMask);
cameraRTTRight->setCullMask(m_sceneNodeMask);
// Create HUD cameras for left eye
osg::ref_ptr<osg::Camera> cameraHUDLeft = createHUDCamera(0.0, 1.0, 0.0, 1.0, gc);
cameraHUDLeft->setName("LeftHUD");
cameraHUDLeft->setViewport(new osg::Viewport(0, 0,
m_device->hScreenResolution() / 2.0f, m_device->vScreenResolution()));
// Create HUD cameras for right eye
osg::ref_ptr<osg::Camera> cameraHUDRight = createHUDCamera(0.0, 1.0, 0.0, 1.0, gc);
cameraHUDRight->setName("RightHUD");
cameraHUDRight->setViewport(new osg::Viewport(m_device->hScreenResolution() / 2.0f, 0,
m_device->hScreenResolution() / 2.0f, m_device->vScreenResolution()));
// Create quads for each camera
osg::ref_ptr<osg::Geode> leftQuad = createHUDQuad(1.0f, 1.0f);
cameraHUDLeft->addChild(leftQuad);
osg::ref_ptr<osg::Geode> rightQuad = createHUDQuad(1.0f, 1.0f);
cameraHUDRight->addChild(rightQuad);
// Set up shaders from the Oculus SDK documentation
osg::ref_ptr<osg::Program> program = new osg::Program;
osg::ref_ptr<osg::Shader> vertexShader = new osg::Shader(osg::Shader::VERTEX);
vertexShader->loadShaderSourceFromFile(osgDB::findDataFile("warp.vert"));
osg::ref_ptr<osg::Shader> fragmentShader = new osg::Shader(osg::Shader::FRAGMENT);
// Fragment shader with or without correction for chromatic aberration
if (m_useChromaticAberrationCorrection) {
fragmentShader->loadShaderSourceFromFile(osgDB::findDataFile("warpWithChromeAb.frag"));
} else {
fragmentShader->loadShaderSourceFromFile(osgDB::findDataFile("warpWithoutChromeAb.frag"));
}
program->addShader(vertexShader);
program->addShader(fragmentShader);
// Attach shaders to each HUD
osg::StateSet* leftEyeStateSet = leftQuad->getOrCreateStateSet();
osg::StateSet* rightEyeStateSet = rightQuad->getOrCreateStateSet();
applyShaderParameters(leftEyeStateSet, program.get(), textureLeft.get(), OculusDevice::LEFT_EYE);
applyShaderParameters(rightEyeStateSet, program.get(), textureRight.get(), OculusDevice::RIGHT_EYE);
// Add RTT cameras as slaves, specifying offsets for the projection
view.addSlave(cameraRTTLeft,
m_device->projectionOffsetMatrix(OculusDevice::LEFT_EYE),
m_device->viewMatrix(OculusDevice::LEFT_EYE),
true);
view.addSlave(cameraRTTRight,
m_device->projectionOffsetMatrix(OculusDevice::RIGHT_EYE),
m_device->viewMatrix(OculusDevice::RIGHT_EYE),
true);
// Add HUD cameras as slaves
view.addSlave(cameraHUDLeft, false);
view.addSlave(cameraHUDRight, false);
view.setName("Oculus");
// Connect main camera to node callback that get HMD orientation
if (m_useOrientations) {
_main_camera->setDataVariance(osg::Object::DYNAMIC);
_callback = new OculusViewConfigOrientationCallback(cameraRTTLeft, cameraRTTRight, m_device);
_main_camera->setUpdateCallback(_callback);
}
}
int main(void){
osg::DisplaySettings::instance()->setNumMultiSamples( 4 );
viewer.setUpViewInWindow( 100, 50, 800, 600 );
viewer.getCamera()->setClearColor( osg::Vec4( 0.5,0.5,0.5,1) );
viewer.addEventHandler(new osgViewer::StatsHandler);
osg::Group* scene = new osg::Group;
// Création d'une boîte centrée à l'origine, de dimensions 2x3x4:
osg::Box* boite = new osg::Box(osg::Vec3(-10, 0, 0), 2,3,4);
osg::ShapeDrawable* boiteDrawable = new osg::ShapeDrawable(boite);
osg::Geode* geodeBoite = new osg::Geode();
geodeBoite->addDrawable(boiteDrawable);
osg::Sphere* sphere = new osg::Sphere( osg::Vec3(10,0,0), 1.0);
osg::ShapeDrawable* sphereDrawable = new osg::ShapeDrawable(sphere);
osg::Geode* geodeSphere = new osg::Geode();
geodeSphere->addDrawable(sphereDrawable);
osg::Capsule* capsule = new osg::Capsule(osg::Vec3(0, 0, 0), 1.0, 3.0);
osg::ShapeDrawable* capsuleDrawable = new osg::ShapeDrawable(capsule);
osg::Geode* geodeCapsule = new osg::Geode();
geodeCapsule->addDrawable(capsuleDrawable);
osg::Cone* cone = new osg::Cone(osg::Vec3(0, 10, 0), 1, 2);
osg::ShapeDrawable* coneDrawable = new osg::ShapeDrawable(cone);
osg::Geode* geodeCone= new osg::Geode();
geodeCone->addDrawable(coneDrawable);
osg::Material* matBoite = new osg::Material;
matBoite->setAmbient (osg::Material::FRONT_AND_BACK, osg::Vec4(0.5, 0.0, 0.0, 1.0));
matBoite->setDiffuse (osg::Material::FRONT_AND_BACK, osg::Vec4(0.9, 0.0, 0.0, 1.0));
matBoite->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(0.2, 0.2, 0.2, 1.0));
matBoite->setShininess(osg::Material::FRONT_AND_BACK, 64);
osg::Material* matCone = new osg::Material;
matCone->setAmbient (osg::Material::FRONT_AND_BACK, osg::Vec4(0.5, 0.0, 0.5, 1.0));
matCone->setDiffuse (osg::Material::FRONT_AND_BACK, osg::Vec4(0.9, 0.0, 0.9, 1.0));
matCone->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(0.2, 0.2, 0.2, 1.0));
matCone->setShininess(osg::Material::FRONT_AND_BACK, 64);
osg::Node* aregne = osgDB::readNodeFile("cow_high.3ds");
transformAregne->setPosition(osg::Vec3(5, 0, 0));
transformAregne->setScale(osg::Vec3(0.2, 0.2, 0.2));
transformAregne->getOrCreateStateSet()->setMode(GL_NORMALIZE,osg::StateAttribute::ON);
transformAregne->addChild(aregne);
boiteDrawable->getOrCreateStateSet()->setAttributeAndModes(matBoite);
coneDrawable->getOrCreateStateSet()->setAttributeAndModes(matCone);
/*scene->addChild(geodeCapsule);
scene->addChild(geodeCone);
scene->addChild(geodeBoite);
scene->addChild(geodeSphere);
scene->addChild(transformAregne);*/
scene->addChild(aregne);
// Création d'une texture
osg::ref_ptr<osg::Texture2D> tex2D = new osg::Texture2D;
tex2D->setTextureSize(1024, 1024);
tex2D->setInternalFormat(GL_RGBA);
// Création d'une caméra qui effectuera son rendu dans la texture
osg::ref_ptr<osg::Camera> rttCamera =
createRTTCamera(osg::Camera::COLOR_BUFFER, tex2D.get());
// On indique la partie du graphe que la caméra devra rendre, ici toute la scène :
rttCamera->addChild(scene);
// Création d'une caméra permettant d'afficher un HUD qui couvrira tout l'écran
osg::ref_ptr<osg::Camera> hudCamera = createHUDCamera();
osg::Geode* screenQuad = createScreenQuad();
hudCamera->addChild(screenQuad);
osg::StateSet* stateset = screenQuad->getOrCreateStateSet();
stateset->setTextureAttributeAndModes(0, tex2D.get());
// VOUS METTREZ ICI LE CODE DE LA QUESTION 7
// Création d'une nouvelle racine du graphe, à laquelle on rattache la caméra
// de rendu dans une texture, la caméra du HUD et la racine du graphe de la scène
osg::ref_ptr<osg::Group> root = new osg::Group;
root->addChild(rttCamera.get());
root->addChild(hudCamera.get());
root->addChild(scene);
// Indique au viewer la scène à affich
trackCone->setTrackNode(geodeCone);
trackCone->setTrackerMode(osgGA::NodeTrackerManipulator::NODE_CENTER);
trackBoite->setTrackNode(geodeBoite);
trackBoite->setTrackerMode(osgGA::NodeTrackerManipulator::NODE_CENTER);
trackSphere->setTrackNode(geodeSphere);
trackSphere->setTrackerMode(osgGA::NodeTrackerManipulator::NODE_CENTER);
transformAregne->setUpdateCallback(new Deplacement);
viewer.setSceneData(scene);
osg::ref_ptr<GestionEvenements> gestionnaire = new GestionEvenements();
viewer.addEventHandler(gestionnaire.get());
return viewer.run();
}
void OculusViewConfig::configure(osgViewer::View& view) const
{
m_dev->setNearClip(m_nearClip);
m_dev->setFarClip(m_farClip);
m_dev->setSensorPredictionEnabled(m_useSensorPrediction);
m_dev->setSensorPredictionDelta(m_predictionDelta);
if (m_useCustomScaleFactor) {
m_dev->setCustomScaleFactor(m_customScaleFactor);
}
// Create screen with match the Oculus Rift resolution
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi) {
osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}
unsigned int width, height;
wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->windowDecoration = false;
traits->x = 0;
traits->y = 0;
traits->width = m_dev->hScreenResolution();
traits->height = m_dev->vScreenResolution();
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->sampleBuffers = true;
traits->samples = 4;
traits->vsync = true;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits);
osg::ref_ptr<osg::Camera> camera = view.getCamera();
camera->setGraphicsContext(gc);
// Use full viewport
camera->setViewport(new osg::Viewport(0, 0, traits->width, traits->height));
// Disable automatic computation of near and far plane on main camera, will propagate to slave cameras
camera->setComputeNearFarMode( osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR );
const int textureWidth = m_dev->scaleFactor() * m_dev->hScreenResolution()/2;
const int textureHeight = m_dev->scaleFactor() * m_dev->vScreenResolution();
// master projection matrix
camera->setProjectionMatrix(m_dev->projectionCenterMatrix());
osg::ref_ptr<osg::Texture2D> l_tex = new osg::Texture2D;
l_tex->setTextureSize( textureWidth, textureHeight );
l_tex->setInternalFormat( GL_RGBA );
osg::ref_ptr<osg::Texture2D> r_tex = new osg::Texture2D;
r_tex->setTextureSize( textureWidth, textureHeight );
r_tex->setInternalFormat( GL_RGBA );
osg::ref_ptr<osg::Camera> l_rtt = createRTTCamera(osg::Camera::COLOR_BUFFER, l_tex, gc);
osg::ref_ptr<osg::Camera> r_rtt = createRTTCamera(osg::Camera::COLOR_BUFFER, r_tex, gc);
// Create HUD cameras for each eye
osg::ref_ptr<osg::Camera> l_hud = createHUDCamera(0.0, 1.0, 0.0, 1.0, gc);
l_hud->setViewport(new osg::Viewport(0, 0, m_dev->hScreenResolution() / 2.0f, m_dev->vScreenResolution()));
osg::ref_ptr<osg::Camera> r_hud = createHUDCamera(0.0, 1.0, 0.0, 1.0, gc);
r_hud->setViewport(new osg::Viewport(m_dev->hScreenResolution() / 2.0f, 0,
m_dev->hScreenResolution() / 2.0f, m_dev->vScreenResolution()));
// Create quads on each camera
osg::ref_ptr<osg::Geode> leftQuad = createHUDQuad(1.0f, 1.0f);
l_hud->addChild(leftQuad);
osg::ref_ptr<osg::Geode> rightQuad = createHUDQuad(1.0f, 1.0f);
r_hud->addChild(rightQuad);
// Set up shaders from the Oculus SDK documentation
osg::ref_ptr<osg::Program> program = new osg::Program;
osg::ref_ptr<osg::Shader> vertexShader = new osg::Shader(osg::Shader::VERTEX);
vertexShader->loadShaderSourceFromFile(osgDB::findDataFile("warp.vert"));
osg::ref_ptr<osg::Shader> fragmentShader = new osg::Shader(osg::Shader::FRAGMENT);
// Fragment shader with or without correction for chromatic aberration
if (m_useChromaticAberrationCorrection) {
fragmentShader->loadShaderSourceFromFile(osgDB::findDataFile("warpWithChromeAb.frag"));
} else {
fragmentShader->loadShaderSourceFromFile(osgDB::findDataFile("warpWithoutChromeAb.frag"));
}
program->addShader(vertexShader);
program->addShader(fragmentShader);
// Configure state sets for both eyes
osg::StateSet* leftEyeStateSet = leftQuad->getOrCreateStateSet();
leftEyeStateSet->setTextureAttributeAndModes(0, l_tex, osg::StateAttribute::ON);
leftEyeStateSet->setAttributeAndModes( program, osg::StateAttribute::ON );
leftEyeStateSet->addUniform( new osg::Uniform("WarpTexture", 0) );
leftEyeStateSet->addUniform( new osg::Uniform("LensCenter", m_dev->lensCenter(OculusDevice::LEFT_EYE)));
leftEyeStateSet->addUniform( new osg::Uniform("ScreenCenter", m_dev->screenCenter()));
leftEyeStateSet->addUniform( new osg::Uniform("Scale", m_dev->scale()));
leftEyeStateSet->addUniform( new osg::Uniform("ScaleIn", m_dev->scaleIn()));
leftEyeStateSet->addUniform( new osg::Uniform("HmdWarpParam", m_dev->warpParameters()));
leftEyeStateSet->addUniform( new osg::Uniform("ChromAbParam", m_dev->chromAbParameters()));
osg::StateSet* rightEyeStateSet = rightQuad->getOrCreateStateSet();
rightEyeStateSet->setTextureAttributeAndModes(0, r_tex, osg::StateAttribute::ON);
rightEyeStateSet->setAttributeAndModes( program, osg::StateAttribute::ON );
rightEyeStateSet->addUniform( new osg::Uniform("WarpTexture", 0) );
rightEyeStateSet->addUniform( new osg::Uniform("LensCenter", m_dev->lensCenter(OculusDevice::RIGHT_EYE)));
rightEyeStateSet->addUniform( new osg::Uniform("ScreenCenter", m_dev->screenCenter()));
rightEyeStateSet->addUniform( new osg::Uniform("Scale", m_dev->scale()));
rightEyeStateSet->addUniform( new osg::Uniform("ScaleIn", m_dev->scaleIn()));
rightEyeStateSet->addUniform( new osg::Uniform("HmdWarpParam", m_dev->warpParameters()));
rightEyeStateSet->addUniform( new osg::Uniform("ChromAbParam", m_dev->chromAbParameters()));
// Add cameras as slaves, specifying offsets for the projection
view.addSlave(l_rtt, m_dev->projectionOffsetMatrix(OculusDevice::LEFT_EYE), m_dev->viewMatrix(OculusDevice::LEFT_EYE), true);
view.addSlave(r_rtt, m_dev->projectionOffsetMatrix(OculusDevice::RIGHT_EYE), m_dev->viewMatrix(OculusDevice::RIGHT_EYE), true);
view.addSlave(l_hud, false);
view.addSlave(r_hud, false);
// Connect main camera to node callback that get HMD orientation
if (m_useOrientations) {
camera->setDataVariance(osg::Object::DYNAMIC);
camera->setUpdateCallback(new OculusViewConfigOrientationCallback(l_rtt, r_rtt, m_dev));
}
}
int main( int argc, char **argv )
{
osg::ArgumentParser arguments(&argc, argv);
arguments.getApplicationUsage()->setDescription(arguments.getApplicationName() + " is the example which demonstrates how to enable/disable blending on specified draw buffers in multi-rendering-target cases.");
std::vector<osg::Texture*> textures;
bool useGlobalBlending = false;
if ( arguments.read("--no-draw-buffers") ) useGlobalBlending = true;
osg::ref_ptr<osg::Node> cessna = osgDB::readRefNodeFile("cessna.osgt");
if (!cessna)
{
OSG_NOTICE<<"Cannot not find model 'cessna.osg' to render"<<std::endl;
return 1;
}
// Create a camera to output multi-rendering-targets (MRT)
osg::ref_ptr<osg::Camera> mrtCam = createMRTCamera( textures );
mrtCam->addChild( cessna );
// Create shader program to be used
const char* mrtFragmentCode = {
"void main() {\n"
" gl_FragData[0] = gl_Color * vec4(1.0, 1.0, 1.0, 0.7);\n"
" gl_FragData[1] = vec4(0.0, 1.0, 1.0, 0.0);\n"
" gl_FragData[2] = vec4(1.0, 0.0, 1.0, 0.3);\n"
" gl_FragData[3] = vec4(1.0, 1.0, 0.0, 1.0);\n"
"}\n"
};
osg::ref_ptr<osg::Program> program = new osg::Program;
program->addShader( new osg::Shader(osg::Shader::FRAGMENT, mrtFragmentCode) );
osg::ref_ptr<osg::StateSet> ss = mrtCam->getOrCreateStateSet();
ss->setAttributeAndModes( program );
// Apply blending to the original scene in MRT
if ( !useGlobalBlending )
{
// Only enable blending on the first draw buffer so other three outputs are
// totally opaque, which is important for MRT cases
ss->setAttribute( new osg::Enablei(GL_BLEND, 0) );
ss->setAttribute( new osg::Disablei(GL_BLEND, 1) );
ss->setAttribute( new osg::Disablei(GL_BLEND, 2) );
ss->setAttribute( new osg::Disablei(GL_BLEND, 3) );
// Accept different blend/colormask attributes on multiple render targets
osg::ref_ptr<osg::BlendFunci> blend0 = new osg::BlendFunci(0, GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
osg::ref_ptr<osg::ColorMaski> colormask3 = new osg::ColorMaski(3, false, true, false, true);
ss->setAttribute( blend0 );
ss->setAttributeAndModes( colormask3 );
}
else
{
// When separated blending is disabled, all rendering targets will be affected
// by its alpha channel and you will see each output blended with the background.
//
// This causes a big program in situations like deferred shading because we may
// have to save different scene data to MRT 'GBuffer', in which alpha channels are
// used to store certain attributes rather than opacity. These attributes can be
// reused in following post-processing steps.
//
// For such targets, alpha blending must be disabled; otherwise it will mess the
// output. That is why this example exists!
osg::ref_ptr<osg::BlendFunc> blend = new osg::BlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
ss->setAttributeAndModes( blend.get() );
}
// Create some quads to be shown on screen to contain the MRT result
osg::ref_ptr<osg::Geode> quad = new osg::Geode;
for ( unsigned int i=0; i<textures.size(); ++i )
{
osg::Geometry* geom = osg::createTexturedQuadGeometry(
osg::Vec3((float)i/(float)textures.size(), 0.0f, 0.0f),
osg::Vec3(1.0f/(float)textures.size()-0.01f,0.0f,0.0f), osg::Vec3(0.0f,1.0f,0.0f) );
geom->getOrCreateStateSet()->setTextureAttributeAndModes( 0, textures[i] );
quad->addDrawable( geom );
}
osg::Camera* hudCam = createHUDCamera( 0.0, 1.0, 0.0, 1.0 );
hudCam->addChild( quad.get() );
// Construct scene graph and viewer
osg::ref_ptr<osg::Group> root = new osg::Group;
root->addChild( mrtCam );
root->addChild( hudCam );
osgViewer::Viewer viewer;
viewer.setSceneData( root.get() );
return viewer.run();
}
int main( int argc, char** argv )
{
osg::ArgumentParser arguments( &argc, argv );
osg::ref_ptr<osg::MatrixTransform> scene = new osg::MatrixTransform;
scene->addChild( osgDB::readNodeFile("sponza.ive") );
// Create MRT camera and setup draw callback
int w = 1600, h = 900;
std::vector<osg::Texture2D*> textures;
osg::Camera* mrtCam = createMRTCamera( textures, w, h );
mrtCam->addChild( scene.get() );
osg::ref_ptr<HBAODrawCallback> vxgi = new HBAODrawCallback;
vxgi->setInputNormalTexture( textures[0] );
vxgi->setInputDepthTexture( textures[1] );
mrtCam->setPostDrawCallback( vxgi.get() );
osg::ref_ptr<osg::Texture2D> outputTex = new osg::Texture2D;
outputTex->setTextureSize( w, h );
outputTex->setSourceType( GL_UNSIGNED_BYTE );
outputTex->setSourceFormat( GL_RGBA );
outputTex->setInternalFormat( GL_RGBA );
outputTex->setWrap( osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE );
outputTex->setWrap( osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE );
outputTex->setFilter( osg::Texture2D::MIN_FILTER, osg::Texture2D::NEAREST );
outputTex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::NEAREST );
vxgi->setOutputTexture( outputTex.get() );
// Create shader program to be used
const char* mrtVertexCode = {
"varying vec4 vecInEye;\n"
"void main() {\n"
" vecInEye = gl_ModelViewMatrix * gl_Vertex;\n"
" gl_Position = ftransform();\n"
"}\n"
};
const char* mrtFragmentCode = {
"uniform mat4 osg_ViewMatrixInverse;\n"
"varying vec4 vecInEye;\n"
"void main() {\n"
" vec3 normal = normalize(cross(dFdx(vecInEye.xyz), dFdy(vecInEye.xyz)));\n"
" normal = mat3(osg_ViewMatrixInverse) * vec3(normal.x, -normal.y, -normal.z);\n"
" gl_FragColor = vec4(normal * 0.5 + vec3(0.5), 1.0);\n"
"}\n"
};
osg::ref_ptr<osg::Program> program = new osg::Program;
program->addShader( new osg::Shader(osg::Shader::VERTEX, mrtVertexCode) );
program->addShader( new osg::Shader(osg::Shader::FRAGMENT, mrtFragmentCode) );
osg::StateSet* ss = mrtCam->getOrCreateStateSet();
ss->setAttributeAndModes( program.get() );
// Create screen quad to contain the MRT result
osg::ref_ptr<osg::Geode> quad = new osg::Geode;
quad->addDrawable( osg::createTexturedQuadGeometry(
osg::Vec3(), osg::Vec3(0.5f, 0.0f, 0.0f), osg::Vec3(0.0f, 1.0f, 0.0f),
0.0f, 0.0f, 0.5f, 1.0f) );
osg::Camera* hudCam = createHUDCamera( 0.0, 1.0, 0.0, 1.0 );
hudCam->getOrCreateStateSet()->setTextureAttributeAndModes( 0, outputTex.get() );
hudCam->addChild( quad.get() );
// Construct scene graph and viewer
osg::ref_ptr<osg::Group> root = new osg::Group;
root->addChild( mrtCam );
root->addChild( hudCam );
root->addChild( scene.get() );
osgViewer::Viewer viewer;
viewer.setSceneData( root.get() );
//viewer.getCamera()->setProjectionMatrixAsPerspective( 30.0f, 16.0f/9.0f, 0.1f, 1000.0f );
//viewer.getCamera()->setComputeNearFarMode( osg::Camera::DO_NOT_COMPUTE_NEAR_FAR );
viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
viewer.addEventHandler( new osgViewer::StatsHandler );
viewer.addEventHandler( new osgViewer::WindowSizeHandler );
viewer.setCameraManipulator( new osgGA::TrackballManipulator );
viewer.setUpViewOnSingleScreen( 0 );
viewer.run();
return 0;
}
