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OpenSceneGraph/examples/osgoscdevice/osgoscdevice.cpp
Robert Osfield 6a67be2e32 Introduced CMake option OSG_PROVIDE_READFILE option that defaults to ON, but when switched to OFF disables the building of the osgDB::read*File() methods, 
forcing users to use osgDB::readRef*File() methods.  The later is preferable as it closes a potential threading bug when using paging databases in conjunction
with the osgDB::Registry Object Cache.  This threading bug occurs when one thread gets an object from the Cache via an osgDB::read*File() call where only
a pointer to the object is passed back, so taking a reference to the object is delayed till it gets reassigned to a ref_ptr<>, but at the same time another
thread calls a flush of the Object Cache deleting this object as it's referenceCount is now zero.  Using osgDB::readREf*File() makes sure the a ref_ptr<> is
passed back and the referenceCount never goes to zero.

To ensure the OSG builds when OSG_PROVIDE_READFILE is to OFF the many cases of osgDB::read*File() usage had to be replaced with a ref_ptr<> osgDB::readRef*File()
usage.  The avoid this change causing lots of other client code to be rewritten to handle the use of ref_ptr<> in place of C pointer I introduced a serious of
templte methods in various class to adapt ref_ptr<> to the underly C pointer to be passed to old OSG API's, example of this is found in include/osg/Group:

    bool addChild(Node* child); // old method which can only be used with a Node*

    tempalte<class T> bool addChild(const osg::ref_ptr<T>& child) { return addChild(child.get()); } // adapter template method

These changes together cover 149 modified files, so it's a large submission. This extent of changes are warrent to make use of the Object Cache
and multi-threaded loaded more robust.



git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/branches/OpenSceneGraph-3.4@15165 16af8721-9629-0410-8352-f15c8da7e697
2015-10-22 14:14:53 +00:00

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/* OpenSceneGraph example, osgcubemap.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <iostream>
#include <osgUtil/Optimizer>
#include <osgDB/ReadFile>
#include <osg/Material>
#include <osg/Geode>
#include <osg/BlendFunc>
#include <osg/Depth>
#include <osg/Projection>
#include <osg/PolygonOffset>
#include <osg/MatrixTransform>
#include <osg/Camera>
#include <osg/ValueObject>
#include <osg/FrontFace>
#include <osg/ShapeDrawable>
#include <osgDB/ReadFile>
#include <osgText/Text>
#include <osgGA/Device>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/StateSetManipulator>
#include <osgViewer/ViewerEventHandlers>
#include <osgViewer/CompositeViewer>
#include <osgFX/Scribe>
#include <osg/io_utils>
#include <osgViewer/api/Cocoa/GraphicsWindowCocoa>
// class to handle events with a pick
class PickHandler : public osgGA::GUIEventHandler {
public:
PickHandler(osgGA::Device* device):
_device(device) {}
~PickHandler() {}
bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa);
virtual void pick(osgViewer::View* view, const osgGA::GUIEventAdapter& ea);
void setLabel(const std::string& name, float x, float y)
{
osg::ref_ptr<osgGA::GUIEventAdapter> ea = new osgGA::GUIEventAdapter();
ea->setEventType(osgGA::GUIEventAdapter::USER);
ea->setName("pick-result");
ea->setUserValue("name", name);
ea->setUserValue("x", x);
ea->setUserValue("y", y);
_device->sendEvent(*ea);
}
protected:
osg::ref_ptr<osgGA::Device> _device;
};
bool PickHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa)
{
switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::PUSH):
{
osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
if (view) pick(view,ea);
return false;
}
case(osgGA::GUIEventAdapter::KEYUP):
{
if (ea.getKey() == 't')
{
osg::ref_ptr<osgGA::GUIEventAdapter> user_event = new osgGA::GUIEventAdapter();
user_event->setEventType(osgGA::GUIEventAdapter::USER);
user_event->setUserValue("vec2f", osg::Vec2f(1.0f,2.0f));
user_event->setUserValue("vec3f", osg::Vec3f(1.0f,2.0f, 3.0f));
user_event->setUserValue("vec4f", osg::Vec4f(1.0f,2.0f, 3.0f, 4.0f));
user_event->setUserValue("vec2d", osg::Vec2d(1.0,2.0));
user_event->setUserValue("vec3d", osg::Vec3d(1.0,2.0, 3.0));
user_event->setUserValue("vec4d", osg::Vec4d(1.0,2.0, 3.0, 4.0));
user_event->setName("osc_test_1");
_device->sendEvent(*user_event);
}
}
default:
return false;
}
}
void PickHandler::pick(osgViewer::View* view, const osgGA::GUIEventAdapter& ea)
{
osgUtil::LineSegmentIntersector::Intersections intersections;
std::string gdlist="";
float x = ea.getX();
float y = ea.getY();
if (view->computeIntersections(ea, intersections))
{
for(osgUtil::LineSegmentIntersector::Intersections::iterator hitr = intersections.begin();
hitr != intersections.end();
++hitr)
{
std::ostringstream os;
if (!hitr->nodePath.empty() && !(hitr->nodePath.back()->getName().empty()))
{
// the geodes are identified by name.
os<<"Object \""<<hitr->nodePath.back()->getName()<<"\""<<std::endl;
}
else if (hitr->drawable.valid())
{
os<<"Object \""<<hitr->drawable->className()<<"\""<<std::endl;
}
os<<" local coords vertex("<< hitr->getLocalIntersectPoint()<<")"<<" normal("<<hitr->getLocalIntersectNormal()<<")"<<std::endl;
os<<" world coords vertex("<< hitr->getWorldIntersectPoint()<<")"<<" normal("<<hitr->getWorldIntersectNormal()<<")"<<std::endl;
const osgUtil::LineSegmentIntersector::Intersection::IndexList& vil = hitr->indexList;
for(unsigned int i=0;i<vil.size();++i)
{
os<<" vertex indices ["<<i<<"] = "<<vil[i]<<std::endl;
}
gdlist += os.str();
}
}
setLabel(gdlist, x, y);
}
class UserEventHandler : public osgGA::EventHandler {
public:
UserEventHandler(osgText::Text* text) : osgGA::EventHandler(), _text(text) {}
~UserEventHandler() {}
virtual bool handle(osgGA::Event* event, osg::Object* object, osg::NodeVisitor* nv);
private:
osg::ref_ptr<osgText::Text> _text;
};
class MyValueListVisitor : public osg::ValueObject::GetValueVisitor {
public:
virtual void apply(bool value) { _ss << value << " (bool)"; }
virtual void apply(char value) { _ss << value << " (char)"; }
virtual void apply(unsigned char value) { _ss << value << " (unsigned char)"; }
virtual void apply(short value) { _ss << value << " (short)"; }
virtual void apply(unsigned short value){ _ss << value << " (unsigned short)"; }
virtual void apply(int value) { _ss << value << " (int)"; }
virtual void apply(unsigned int value) { _ss << value << " (unsigned int)"; }
virtual void apply(float value) { _ss << value << " (float)"; }
virtual void apply(double value) { _ss << value << " (double)"; }
virtual void apply(const std::string& value) { _ss << value << " (std::string)"; }
virtual void apply(const osg::Vec2f& value) { _ss << value << " (osg::Vec2f)"; }
virtual void apply(const osg::Vec3f& value) { _ss << value << " (osg::Vec3f)"; }
virtual void apply(const osg::Vec4f& value) { _ss << value << " (osg::Vec4f)"; }
virtual void apply(const osg::Vec2d& value) { _ss << value << " (osg::Vec2d)"; }
virtual void apply(const osg::Vec3d& value) { _ss << value << " (osg::Vec3d)"; }
virtual void apply(const osg::Vec4d& value) { _ss << value << " (osg::Vec4d)"; }
virtual void apply(const osg::Quat& value) { _ss << value << " (osg::Quat)"; }
virtual void apply(const osg::Plane& value) { _ss << value << " (osg::Plane)"; }
virtual void apply(const osg::Matrixf& value) { _ss << value << " (osg::Matrixf)"; }
virtual void apply(const osg::Matrixd& value) { _ss << value << " (osg::Matrixd)"; }
std::string value() const { return _ss.str(); }
void clear() {_ss.clear(); }
private:
std::ostringstream _ss;
};
bool UserEventHandler::handle(osgGA::Event* event, osg::Object* object, osg::NodeVisitor* nv)
{
OSG_ALWAYS << "handle user-event: " << event->getName() << std::endl;
if (event->getName() == "/pick-result")
{
std::string name("");
float x(0), y(0);
event->getUserValue("name", name);
event->getUserValue("x", x);
event->getUserValue("y", y);
std::ostringstream ss;
ss << "Name: " << std::endl << name << std::endl << std::endl;
ss << "x: " << y << " y: " << y << std::endl;
_text->setText(ss.str());
return true;
}
else if(event->getName() == "/osgga")
{
osg::Vec4 rect;
event->getUserValue("resize", rect);
osgGA::EventVisitor* ev = dynamic_cast<osgGA::EventVisitor*>(nv);
osg::View* view = ev ? dynamic_cast<osgViewer::View*>(ev->getActionAdapter()) : NULL;
if (view && (rect[2] > 0) && (rect[3] > 0))
{
OSG_ALWAYS << "resizing view to " << rect << std::endl;
osgViewer::GraphicsWindow* win = view->getCamera()->getGraphicsContext() ? dynamic_cast<osgViewer::GraphicsWindow*>(view->getCamera()->getGraphicsContext()) : NULL;
if (win)
win->setWindowRectangle(rect[2] + 10 + rect[0], rect[1], rect[2], rect[3]);
}
return true;
}
else {
const osg::UserDataContainer* udc = event->getUserDataContainer();
if (udc)
{
OSG_ALWAYS << "contents of " << udc->getName() << ": " << std::endl;
for(unsigned int i = 0; i < udc->getNumUserObjects(); ++i)
{
const osg::ValueObject* vo = dynamic_cast<const osg::ValueObject*>(udc->getUserObject(i));
OSG_ALWAYS << " " << vo->getName() << ": ";
MyValueListVisitor vlv;
vo->get(vlv);
OSG_ALWAYS << vlv.value() << std::endl;
}
}
return true;
}
return false;
}
osg::Node* createHUD()
{
// create the hud. derived from osgHud.cpp
// adds a set of quads, each in a separate Geode - which can be picked individually
// eg to be used as a menuing/help system!
// Can pick texts too!
osg::Camera* hudCamera = new osg::Camera;
hudCamera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
hudCamera->setProjectionMatrixAsOrtho2D(0,1280,0,1024);
hudCamera->setViewMatrix(osg::Matrix::identity());
hudCamera->setRenderOrder(osg::Camera::POST_RENDER);
hudCamera->setClearMask(GL_DEPTH_BUFFER_BIT);
std::string timesFont("fonts/times.ttf");
// turn lighting off for the text and disable depth test to ensure its always ontop.
osg::Vec3 position(150.0f,800.0f,0.0f);
osg::Vec3 delta(0.0f,-60.0f,0.0f);
{
osg::Geode* geode = new osg::Geode();
osg::StateSet* stateset = geode->getOrCreateStateSet();
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
geode->setName("simple");
hudCamera->addChild(geode);
osgText::Text* text = new osgText::Text;
geode->addDrawable( text );
text->setFont(timesFont);
text->setText("Picking in Head Up Displays is simple!");
text->setPosition(position);
position += delta;
}
for (int i=0; i<5; i++) {
osg::Vec3 dy(0.0f,-30.0f,0.0f);
osg::Vec3 dx(120.0f,0.0f,0.0f);
osg::Geode* geode = new osg::Geode();
osg::StateSet* stateset = geode->getOrCreateStateSet();
const char *opts[]={"One", "Two", "Three", "January", "Feb", "2003"};
osg::Geometry *quad=new osg::Geometry;
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
std::string name="subOption";
name += " ";
name += std::string(opts[i]);
geode->setName(name);
osg::Vec3Array* vertices = new osg::Vec3Array(4); // 1 quad
osg::Vec4Array* colors = new osg::Vec4Array;
colors = new osg::Vec4Array;
colors->push_back(osg::Vec4(0.8-0.1*i,0.1*i,0.2*i, 1.0));
quad->setColorArray(colors, osg::Array::BIND_OVERALL);
(*vertices)[0]=position;
(*vertices)[1]=position+dx;
(*vertices)[2]=position+dx+dy;
(*vertices)[3]=position+dy;
quad->setVertexArray(vertices);
quad->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::QUADS,0,4));
geode->addDrawable(quad);
hudCamera->addChild(geode);
position += delta;
}
{ // this displays what has been selected
osg::Geode* geode = new osg::Geode();
osg::StateSet* stateset = geode->getOrCreateStateSet();
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
geode->setName("The text label");
hudCamera->addChild(geode);
position += delta;
}
return hudCamera;
}
class ForwardToDeviceEventHandler : public osgGA::EventHandler {
public:
ForwardToDeviceEventHandler(osgGA::Device* device) : osgGA::EventHandler(), _device(device) {}
virtual bool handle(osgGA::Event* event, osg::Object* object, osg::NodeVisitor* nv)
{
_device->sendEvent(*event);
return false;
}
protected:
osg::ref_ptr<osgGA::Device> _device;
};
class OscServiceDiscoveredEventHandler: public ForwardToDeviceEventHandler {
public:
OscServiceDiscoveredEventHandler() : ForwardToDeviceEventHandler(NULL) {}
virtual bool handle(osgGA::Event* event, osg::Object* object, osg::NodeVisitor* nv)
{
if (_device.valid())
return ForwardToDeviceEventHandler::handle(event, object, nv);
if (event->getName() == "/zeroconf/service-added")
{
std::string host;
unsigned int port;
event->getUserValue("host", host);
event->getUserValue("port", port);
OSG_ALWAYS << "new osc-service discovered: " << host << ":" << port << std::endl;
std::ostringstream ss ;
ss << host << ":" << port << ".sender.osc";
_device = osgDB::readRefFile<osgGA::Device>(ss.str());
osgGA::EventVisitor* ev = dynamic_cast<osgGA::EventVisitor*>(nv);
osgViewer::View* view = ev ? dynamic_cast<osgViewer::View*>(ev->getActionAdapter()) : NULL;
if (view)
view->addEventHandler(new PickHandler(_device.get()));
return true;
}
return false;
}
};
int main( int argc, char **argv )
{
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
arguments.getApplicationUsage()->addCommandLineOption("--zeroconf","uses zeroconf to advertise the osc-plugin and to discover it");
arguments.getApplicationUsage()->addCommandLineOption("--sender","create a view which sends its events via osc");
arguments.getApplicationUsage()->addCommandLineOption("--recevier","create a view which receive its events via osc");
// read the scene from the list of file specified commandline args.
osg::ref_ptr<osg::Node> scene = osgDB::readRefNodeFiles(arguments);
if (!scene)
{
osg::Geode* geode = new osg::Geode();
osg::ShapeDrawable* drawable = new osg::ShapeDrawable(new osg::Box());
geode->addDrawable(drawable);
scene = geode;
}
bool use_zeroconf(false);
bool use_sender(false);
bool use_receiver(false);
if(arguments.find("--zeroconf") > 0) { use_zeroconf = true; }
if(arguments.find("--sender") > 0) { use_sender = true; }
if(arguments.find("--receiver") > 0) { use_receiver = true; }
// construct the viewer.
osgViewer::CompositeViewer viewer(arguments);
// receiver view
if (use_receiver) {
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->x = 600;
traits->y = 100;
traits->width = 400;
traits->height = 400;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->windowName = "Receiver / view two";
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
osgViewer::View* view = new osgViewer::View;
view->setName("View two");
viewer.addView(view);
osg::Group* group = new osg::Group();
group->addChild(scene.get());
osg::Geode* geode = new osg::Geode();
group->addChild(geode);
osgText::Text* text = new osgText::Text();
geode->addDrawable( text );
text->setFont("Arial.ttf");
text->setText("Waiting for data");
text->setPosition(osg::Vec3(-50,0,30));
text->setAxisAlignment(osgText::TextBase::SCREEN);
text->setDataVariance(osg::Object::DYNAMIC);
text->setCharacterSize(2.0f);
view->setSceneData(group);
view->getCamera()->setName("Cam two");
view->getCamera()->setViewport(new osg::Viewport(0,0, traits->width, traits->height));
view->getCamera()->setGraphicsContext(gc.get());
view->addEventHandler( new osgViewer::StatsHandler );
view->addEventHandler( new UserEventHandler(text) );
osg::ref_ptr<osgGA::Device> device = osgDB::readRefFile<osgGA::Device>("0.0.0.0:9000.receiver.osc");
if (device.valid() && (device->getCapabilities() & osgGA::Device::RECEIVE_EVENTS))
{
view->addDevice(device);
// add a zeroconf device, advertising the osc-device
if(use_zeroconf)
{
osg::ref_ptr<osgGA::Device> zeroconf_device = osgDB::readRefFile<osgGA::Device>("_osc._udp:9000.advertise.zeroconf");
if (zeroconf_device)
{
view->addDevice(zeroconf_device);
}
}
}
else {
OSG_WARN << "could not open osc-device, receiving will not work" << std::endl;
}
}
// sender view
if(use_sender) {
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
traits->x = 100;
traits->y = 100;
traits->width = 400;
traits->height = 400;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->windowName = "Sender / view one";
osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
#ifdef __APPLE__
// as multitouch is disabled by default, enable it now
osgViewer::GraphicsWindowCocoa* win = dynamic_cast<osgViewer::GraphicsWindowCocoa*>(gc.get());
if (win) win->setMultiTouchEnabled(true);
#endif
osgViewer::View* view = new osgViewer::View;
view->setName("View one");
viewer.addView(view);
osg::Group* g = new osg::Group();
g->addChild(scene.get());
g->addChild(createHUD());
view->setSceneData(g);
view->getCamera()->setName("Cam one");
view->getCamera()->setViewport(new osg::Viewport(0,0, traits->width, traits->height));
view->getCamera()->setGraphicsContext(gc.get());
view->setCameraManipulator(new osgGA::TrackballManipulator);
// add the state manipulator
osg::ref_ptr<osgGA::StateSetManipulator> statesetManipulator = new osgGA::StateSetManipulator;
statesetManipulator->setStateSet(view->getCamera()->getOrCreateStateSet());
view->addEventHandler( statesetManipulator.get() );
view->addEventHandler( new osgViewer::StatsHandler );
if (use_zeroconf)
{
osg::ref_ptr<osgGA::Device> zeroconf_device = osgDB::readRefFile<osgGA::Device>("_osc._udp.discover.zeroconf");
if(zeroconf_device) {
view->addDevice(zeroconf_device);
view->getEventHandlers().push_front(new OscServiceDiscoveredEventHandler());
}
}
else
{
osg::ref_ptr<osgGA::Device> device = osgDB::readRefFile<osgGA::Device>("localhost:9000.sender.osc");
if (device.valid() && (device->getCapabilities() & osgGA::Device::SEND_EVENTS))
{
// add as first event handler, so it gets ALL events ...
view->getEventHandlers().push_front(new ForwardToDeviceEventHandler(device.get()));
// add the demo-pick-event-handler
view->addEventHandler(new PickHandler(device.get()));
}
else {
OSG_WARN << "could not open osc-device, sending will not work" << std::endl;
}
}
}
while (arguments.read("-s")) { viewer.setThreadingModel(osgViewer::CompositeViewer::SingleThreaded); }
while (arguments.read("-g")) { viewer.setThreadingModel(osgViewer::CompositeViewer::CullDrawThreadPerContext); }
while (arguments.read("-c")) { viewer.setThreadingModel(osgViewer::CompositeViewer::CullThreadPerCameraDrawThreadPerContext); }
// run the viewer's main frame loop
return viewer.run();
}
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