void InitWnd(osgViewer::Viewer &viewer)
{
int xoffset = 40;
int yoffset = 40;
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->x = xoffset + 0;
traits->y = yoffset + 0;
traits->width = 600;
traits->height = 480;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
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);
//camera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
//camera->setClearColor(osg::Vec4f(0.2f, 0.2f, 0.4f, 1.0f));
//camera->setProjectionMatrixAsPerspective(
// 30.0f, static_cast<double>(traits->width) / static_cast<double>(traits->height), 1.0, 1000.0);
// add this slave camera to the viewer, with a shift left of the projection matrix
viewer.addSlave(camera.get(), osg::Matrixd::translate(1.0, 0.0, 0.0), osg::Matrixd());
}
void singleWindowMultipleCameras(osgViewer::Viewer& viewer)
{
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->x = 0;
traits->y = 0;
traits->width = width;
traits->height = height;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (gc.valid())
{
osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
// need to ensure that the window is cleared make sure that the complete window is set the correct colour
// rather than just the parts of the window that are under the camera's viewports
gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
else
{
osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
}
unsigned int numCameras = 2;
double aspectRatioScale = 1.0;///(double)numCameras;
for(unsigned int i=0; i<numCameras;++i)
{
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport((i*width)/numCameras,(i*height)/numCameras, width/numCameras, height/numCameras));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::scale(aspectRatioScale,1.0,1.0));
}
}
void multipleWindowMultipleCameras(osgViewer::Viewer& viewer, bool multipleScreens)
{
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);
unsigned int numCameras = 6;
double aspectRatioScale = (double)numCameras;
double translate_x = double(numCameras)-1;
for(unsigned int i=0; i<numCameras;++i, translate_x -= 2.0)
{
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->screenNum = multipleScreens ? i / 3 : 0;
traits->x = (i*width)/numCameras;
traits->y = 0;
traits->width = width/numCameras-1;
traits->height = height;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (gc.valid())
{
osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
}
else
{
osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
}
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
camera->setViewport(new osg::Viewport(0,0, width/numCameras, height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrix::scale(aspectRatioScale, 1.0, 1.0)*osg::Matrix::translate(translate_x, 0.0, 0.0), osg::Matrix() );
}
}
void setupCameraAndContext(osgViewer::Viewer& viewer, int windowWidth, int windowHeight)
{
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->x = 0;
traits->y = 0;
// use either system native screen size or what was specified in command line
if (windowWidth > 0 && windowHeight > 0)
{
traits->width = windowWidth;
traits->height = windowHeight;
traits->x = 50;
traits->y = 50;
}
else
{
traits->width = width;
traits->height = height;
}
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
if (gc.valid())
{
osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
// need to ensure that the window is cleared make sure that the complete window is set the correct colour
// rather than just the parts of the window that are under the camera's viewports
gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
else
{
osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
}
unsigned int numCameras = 1;
double aspectRatioScale = 1.0;///(double)numCameras;
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext(gc.get());
if (windowWidth > 0 && windowHeight > 0)
camera->setViewport(new osg::Viewport(0, 0, windowWidth, windowHeight));
else
camera->setViewport(new osg::Viewport(0, 0, width, height));
GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT;
camera->setDrawBuffer(buffer);
camera->setReadBuffer(buffer);
viewer.addSlave(camera.get(), osg::Matrixd(), osg::Matrixd::scale(aspectRatioScale,1.0,1.0));
// create HUD camera
osg::ref_ptr<osg::Camera> overlayCamera = createStatsOverlayCamera();
overlayCamera->setGraphicsContext(gc.get());
overlayCamera->setViewport(0,0,gc.get()->getTraits()->width, gc.get()->getTraits()->height);
viewer.addSlave(overlayCamera.get(), false);
}