Example 4: Mixed OSG/SFML Rendering
This is what eXpl0it3r already hinted at: Drawing from both APIs. This can be somewhat tricky due to the shared OpenGL state. Nevertheless, it is possible and here is one way to go about it:
#if defined(_DEBUG)
#pragma comment(linker, "/SUBSYSTEM:\"console\"")
#else
#pragma comment(linker, "/SUBSYSTEM:\"windows\" /ENTRY:\"mainCRTStartup\"")
#endif
#if defined(_DEBUG)
#pragma comment(lib, "sfml-graphics-d.lib")
#pragma comment(lib, "sfml-window-d.lib")
#pragma comment(lib, "sfml-system-d.lib")
#else
#pragma comment(lib, "sfml-graphics.lib")
#pragma comment(lib, "sfml-window.lib")
#pragma comment(lib, "sfml-system.lib")
#endif
#if defined(_DEBUG)
#pragma comment(lib, "osgd.lib")
#pragma comment(lib, "osgDBd.lib")
#pragma comment(lib, "osgGAd.lib")
#pragma comment(lib, "osgViewerd.lib")
#else
#pragma comment(lib, "osg.lib")
#pragma comment(lib, "osgDB.lib")
#pragma comment(lib, "osgGA.lib")
#pragma comment(lib, "osgViewer.lib")
#endif
#include <SFML/Graphics.hpp>
#pragma warning(push)
#pragma warning(disable: 4250)
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osgGA/TrackballManipulator>
#include <osgViewer/Viewer>
#pragma warning(pop)
#include "sf2osg.h"
int main(int argc, char** argv)
{
//osg::setNotifyLevel(osg::DEBUG_INFO);
sf::RenderWindow window;
window.setVerticalSyncEnabled(true);
sf::VideoMode mode = sf::VideoMode::getDesktopMode();
mode.width = 800;
mode.height = 600;
window.create(mode, "SFML+OSG Example");
osg::ref_ptr<osg::Node> root = osgDB::readNodeFile("cow.osg");
if (!root)
{
std::cerr << "Failed to load model." << std::endl;
return 1;
}
sf::Vector2u size = window.getSize();
sf::Font font;
if (!font.loadFromFile("verdana.ttf"))
{
std::cerr << "Failed to load font." << std::endl;
return 1;
}
sf::Text text("Hello SFML+OSG!", font, 24);
sf::FloatRect bounds = text.getLocalBounds();
text.setPosition((size.x-bounds.width)/2.0f, (size.y-bounds.height)/2.0f);
osgViewer::Viewer viewer;
osg::ref_ptr<osgViewer::GraphicsWindowEmbedded> gw = viewer.setUpViewerAsEmbeddedInWindow(0, 0, size.x, size.y);
viewer.setCameraManipulator(new osgGA::TrackballManipulator);
viewer.setSceneData(root.get());
viewer.realize();
while (window.isOpen())
{
sf::Event event;
while (window.pollEvent(event))
{
sf2osg::processEvent(*(gw->getEventQueue()), event);
switch(event.type)
{
case sf::Event::Closed:
window.close();
break;
case sf::Event::KeyPressed:
if (event.key.code == sf::Keyboard::Escape)
{
window.close();
}
break;
case sf::Event::Resized:
window.setView(sf::View(sf::FloatRect(0.0f, 0.0f, float(event.size.width), float(event.size.height))));
gw->resized(0, 0, event.size.width, event.size.height);
break;
}
}
if (!window.isOpen()) break;
window.setActive();
viewer.frame();
window.pushGLStates();
window.draw(text);
window.popGLStates();
window.display();
}
return 0;
}
While it can be done, I am not convinced that it is actually a good idea. It may be better to just stick with one rendering API. If you're already using OSG, you might as well use it for all your drawing code.
Show Posts
