我选择的是ubuntu8.04 + codeblocks8.02的开发环境。
Ogre用的是1.4.5的版本。
下面是用SDL进行的一个简单的代码.
#include <Ogre.h>
#include <iostream>
#include <SDL/SDL.h>
#include <SDL/SDL_syswm.h>
#include <SDL/SDL_events.h>
using namespace std;
using namespace Ogre;
class AppListener : public FrameListener
{
public:
AppListener( RenderWindow *_win ) : win( _win )
{
}
public:
bool frameStarted(const FrameEvent& evt)
{
if ( !FrameListener::frameStarted( evt ) )
return false;
SDL_PollEvent( &event );
return true;
}
bool frameEnded(const FrameEvent& evt)
{
if ( !FrameListener::frameEnded( evt ) )
return false;
SDL_PollEvent( &event );
if ( event.type == SDL_KEYDOWN )
{
if ( event.key.keysym.sym == SDLK_ESCAPE )
return false;
}
return true;
}
private:
RenderWindow *win;
SDL_Event event;
};
void parseWindowGeometry( Ogre::ConfigOptionMap& config, unsigned int& width, unsigned int& height, bool& fullscreen );
int main()
{
Root *root = new Root( "plugins.cfg" );
RenderWindow *win;
if ( !root->showConfigDialog() )
return 0;
if ( SDL_WasInit( SDL_INIT_VIDEO ) == 0 )
{
unsigned int height = 300, width = 400;
bool fullscreen;
parseWindowGeometry( root->getRenderSystem()->getConfigOptions(), width, height, fullscreen );
root->initialise( false );
SDL_Init( SDL_INIT_VIDEO );
SDL_SetVideoMode( width, height / 2, 0, 0 );
SDL_WM_SetCaption( "OgreTest", "ogretest" );
SDL_SysWMinfo info;
SDL_VERSION(&info.version);
SDL_GetWMInfo(&info);
std::string dsp(&(DisplayString(info.info.x11.display)[1]));
std::vector<Ogre::String> tokens = Ogre::StringUtil::split(dsp, ".");
Ogre::NameValuePairList misc;
std::string s = Ogre::StringConverter::toString((long)info.info.x11.display);
s += ":" + tokens[1] +":";
s += Ogre::StringConverter::toString((long)info.info.x11.window);
misc["parentWindowHandle"] = s;
win = root->createRenderWindow("ogre", width, height, fullscreen, &misc);
///we need to set the window to be active by ourselves, since GLX by default sets it to false, but then activates it upon recieving some X event (which it will never recieve since we'll use SDL).
///see OgreGLXWindow.cpp
win->setActive(true);
win->setAutoUpdated(true);
}
else
{
win = root->initialise( true );
}
root->addFrameListener( new AppListener( win ) );
root->startRendering();
return 0;
}
void parseWindowGeometry( Ogre::ConfigOptionMap& config, unsigned int& width, unsigned int& height, bool& fullscreen )
{
Ogre::ConfigOptionMap::iterator opt = config.find( "Video Mode" );
if ( opt != config.end() )
{
Ogre::String val = opt->second.currentValue;
Ogre::String::size_type pos = val.find( 'x' );
if ( pos != Ogre::String::npos )
{
width = Ogre::StringConverter::parseUnsignedInt( val.substr( 0, pos ) );
height = Ogre::StringConverter::parseUnsignedInt( val.substr( pos + 1 ) );
}
opt = config.find( "Full Screen" );
if ( opt != config.end() )
{
fullscreen = ( opt->second.currentValue == "Yes" );
}
}
}
原理很简单。
图：
