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Work on CompositeViewer and related calsses to implement viewers with multiple views

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This commit is contained in:
Robert Osfield
2007-01-16 08:56:33 +00:00
parent 6fda4a927a
commit 0873a8cea0
11 changed files with 1650 additions and 158 deletions
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4
examples/osgcamera/osgcamera.cpp
View File

@@ -119,7 +119,7 @@ void singleWindowMultipleCameras(osgViewer::Viewer& viewer)
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi)
{
osg::notify(osg::NOTICE)<<"View::setUpViewAcrossAllScreens() : Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}
@@ -170,7 +170,7 @@ void multipleWindowMultipleCameras(osgViewer::Viewer& viewer)
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi)
{
osg::notify(osg::NOTICE)<<"View::setUpViewAcrossAllScreens() : Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return;
}

129
examples/osgmultiplecameras/osgmultiplecameras.cpp
View File

@@ -13,7 +13,6 @@
#include <osgUtil/Optimizer>
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
#include <osg/Material>
#include <osg/Geode>
@@ -27,37 +26,10 @@
#include <osgText/Text>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
osg::Node* createRearView(osg::Node* subgraph, const osg::Vec4& clearColour)
{
osg::Camera* camera = new osg::Camera;
// set the viewport
camera->setViewport(10,10,400,200);
// set the view matrix
camera->setCullingActive(false);
camera->setReferenceFrame(osg::Transform::RELATIVE_RF);
camera->setTransformOrder(osg::Camera::POST_MULTIPLY);
camera->setProjectionMatrix(osg::Matrixd::scale(-1.0f,1.0f,1.0f));
camera->setViewMatrix(osg::Matrixd::rotate(osg::inDegrees(180.0f),0.0f,1.0f,0.0f));
// set clear the color and depth buffer
camera->setClearColor(clearColour);
camera->setClearMask(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
// draw subgraph after main camera view.
camera->setRenderOrder(osg::Camera::POST_RENDER);
// add the subgraph to draw.
camera->addChild(subgraph);
// switch of back face culling as we've swapped over the projection matrix making back faces become front faces.
camera->getOrCreateStateSet()->setAttribute(new osg::FrontFace(osg::FrontFace::CLOCKWISE));
return camera;
}
#include <osgViewer/CompositeViewer>
int main( int argc, char **argv )
{
@@ -65,27 +37,94 @@ int main( int argc, char **argv )
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
// construct the viewer.
osgViewer::Viewer viewer;
// read the scene from the list of file specified commandline args.
osg::ref_ptr<osg::Node> scene = osgDB::readNodeFiles(arguments);
osg::ref_ptr<osg::Group> group = new osg::Group;
if (!scene) return 1;
// construct the viewer.
osgViewer::CompositeViewer viewer;
// add the HUD subgraph.
if (scene.valid()) group->addChild(scene.get());
if (arguments.read("-1"))
{
#if 1
osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
if (!wsi)
{
osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
return 1;
}
osg::Vec4 colour = viewer.getCamera()->getClearColor();
colour.r() *= 0.5f;
colour.g() *= 0.5f;
colour.b() *= 0.5f;
unsigned int width, height;
wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
// note tone down the normal back ground colour to make it obvious that there is a seperate camera inserted.
group->addChild(createRearView(scene.get(), colour));
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;
// set the scene to render
viewer.setSceneData(group.get());
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;
}
osgViewer::View* view_one = new osgViewer::View;
view_one->setSceneData(scene.get());
view_one->getCamera()->setViewport(new osg::Viewport(0,0, width/2, height/2));
view_one->getCamera()->setGraphicsContext(gc.get());
view_one->setCameraManipulator(new osgGA::TrackballManipulator);
viewer.addView(view_one);
osgViewer::View* view_two = new osgViewer::View;
view_two->setSceneData(scene.get());
view_two->getCamera()->setViewport(new osg::Viewport(width/2,0, width/2, height/2));
view_two->getCamera()->setGraphicsContext(gc.get());
view_two->setCameraManipulator(new osgGA::TrackballManipulator);
viewer.addView(view_two);
#endif
osgViewer::View* view_three = new osgViewer::View;
view_three->setSceneData(osgDB::readNodeFile("town.ive"));
view_three->setUpViewAcrossAllScreens();
#if 0
view_three->getCamera()->setViewport(new osg::Viewport(0, height/2, width, height/2));
view_three->getCamera()->setGraphicsContext(gc.get());
#endif
view_three->setCameraManipulator(new osgGA::FlightManipulator);
viewer.addView(view_three);
}
else
{
osgViewer::View* view_one = new osgViewer::View;
view_one->setUpViewOnSingleScreen(0);
view_one->setSceneData(scene.get());
view_one->setCameraManipulator(new osgGA::TrackballManipulator);
viewer.addView(view_one);
osgViewer::View* view_two = new osgViewer::View;
view_two->setUpViewOnSingleScreen(1);
view_two->setSceneData(scene.get());
view_two->setCameraManipulator(new osgGA::TrackballManipulator);
viewer.addView(view_two);
}
while (arguments.read("-s")) { viewer.setThreadingModel(osgViewer::CompositeViewer::SingleThreaded); }
while (arguments.read("-g")) { viewer.setThreadingModel(osgViewer::CompositeViewer::ThreadPerContext); }
while (arguments.read("-c")) { viewer.setThreadingModel(osgViewer::CompositeViewer::ThreadPerCamera); }
return viewer.run();
}