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);
}
}
/* Public functions */
void OculusViewConfig::configure(osgViewer::View& view) const
{
// Create a graphic context based on our desired traits
osg::ref_ptr<osg::GraphicsContext::Traits> traits = m_device->graphicsContextTraits();
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;
}
// Attach to window, needed for direct mode
m_device->attachToWindow(gc);
// Attach a callback to detect swap
osg::ref_ptr<OculusSwapCallback> swapCallback = new OculusSwapCallback(m_device);
gc->setSwapCallback(swapCallback);
osg::ref_ptr<osg::Camera> camera = view.getCamera();
camera->setName("Main");
// Disable scene rendering for main camera
camera->setCullMask(~m_sceneNodeMask);
camera->setGraphicsContext(gc);
// Use full view port
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_device->renderTargetWidth()/2;
const int textureHeight = m_device->renderTargetHeight();
// master projection matrix
camera->setProjectionMatrix(m_device->projectionMatrixCenter());
// 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 cameras and attach textures
osg::ref_ptr<osg::Camera> cameraRTTLeft = m_device->createRTTCamera(textureLeft, OculusDevice::LEFT, osg::Camera::RELATIVE_RF, gc);
osg::ref_ptr<osg::Camera> cameraRTTRight = m_device->createRTTCamera(textureRight, OculusDevice::RIGHT, osg::Camera::RELATIVE_RF, gc);
cameraRTTLeft->setName("LeftRTT");
cameraRTTRight->setName("RightRTT");
cameraRTTLeft->setCullMask(m_sceneNodeMask);
cameraRTTRight->setCullMask(m_sceneNodeMask);
// Create warp ortho camera
osg::ref_ptr<osg::Camera> cameraWarp = m_device->createWarpOrthoCamera(0.0, 1.0, 0.0, 1.0, gc);
cameraWarp->setName("WarpOrtho");
cameraWarp->setViewport(new osg::Viewport(0, 0, m_device->screenResolutionWidth(), m_device->screenResolutionHeight()));
// Create shader program
osg::ref_ptr<osg::Program> program = m_device->createShaderProgram();
// Create distortionMesh for each camera
osg::ref_ptr<osg::Geode> leftDistortionMesh = m_device->distortionMesh(OculusDevice::LEFT, program, 0, 0, textureWidth, textureHeight);
cameraWarp->addChild(leftDistortionMesh);
osg::ref_ptr<osg::Geode> rightDistortionMesh = m_device->distortionMesh(OculusDevice::RIGHT, program, 0, 0, textureWidth, textureHeight);
cameraWarp->addChild(rightDistortionMesh);
// Add pre draw camera to handle time warp
cameraWarp->setPreDrawCallback(new WarpCameraPreDrawCallback(m_device));
// Attach shaders to each distortion mesh
osg::ref_ptr<osg::StateSet> leftEyeStateSet = leftDistortionMesh->getOrCreateStateSet();
osg::ref_ptr<osg::StateSet> rightEyeStateSet = rightDistortionMesh->getOrCreateStateSet();
m_device->applyShaderParameters(leftEyeStateSet, program.get(), textureLeft.get(), OculusDevice::LEFT);
m_device->applyShaderParameters(rightEyeStateSet, program.get(), textureRight.get(), OculusDevice::RIGHT);
// Add RTT cameras as slaves, specifying offsets for the projection
view.addSlave(cameraRTTLeft,
m_device->projectionOffsetMatrixLeft(),
m_device->viewMatrixLeft(),
true);
view.addSlave(cameraRTTRight,
m_device->projectionOffsetMatrixRight(),
m_device->viewMatrixRight(),
true);
// Use sky light instead of headlight to avoid light changes when head movements
view.setLightingMode(osg::View::SKY_LIGHT);
// Add warp camera as slave
view.addSlave(cameraWarp, false);
view.setName("Oculus");
// Connect main camera to node callback that get HMD orientation
camera->setDataVariance(osg::Object::DYNAMIC);
camera->setCullCallback(new OculusViewConfigOrientationCallback(cameraRTTLeft, cameraRTTRight, m_device, swapCallback, m_warning));
// Add Oculus keyboard handler
view.addEventHandler(new OculusEventHandler(m_device));
view.addEventHandler(new OculusWarningEventHandler(m_device, m_warning));
}
