OSG+CEGUI程序框架OpenSceneGraph-2.8.2+CEGUI-SDK-0.7.1-vc9

http://blog.csdn.net/pizi0475

痞子龙3D编程

CEGuiDrawable.h

#pragma once
#include <osg/Drawable>

class CEGuiDrawable :
public osg::Drawable
{
public:
CEGuiDrawable();
CEGuiDrawable(const CEGuiDrawable& drawable,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
Drawable(drawable,copyop) {}

META_Object(osg,CEGuiDrawable);

//初始话CEGUI，添加所需要的资源以及设定相关的属性
void InitCEGUI();
//这个函数在基类Drawable里是一个纯虚函数，实现OpenGL渲染时必须重写
void drawImplementation(osg::RenderInfo& renderInfo) const;

protected:
//析构函数。在结束时释放资源
virtual ~CEGuiDrawable();
unsigned int m_activeContextID;
};





CEGuiDrawable.cpp



#include "StdAfx.h"
#include "CEGuiDrawable.h"
#include "CEGuiEventCallback.h"

CEGuiDrawable::CEGuiDrawable()
{
setSupportsDisplayList(false);
setEventCallback(new CEGuiEventCallback());
CEGUI::System::create( CEGUI::OpenGLRenderer::create());
m_activeContextID = 0;
}

void CEGuiDrawable::drawImplementation(osg::RenderInfo& renderInfo) const
{
osg::State& state = *renderInfo.getState();
if (state.getContextID()!=m_activeContextID) return;
glPushAttrib(GL_ALL_ATTRIB_BITS);
state.disableAllVertexArrays();

//在每帧渲染后调用
CEGUI::System::getSingleton().renderGUI();
glPopAttrib();
state.checkGLErrors("CEGuiDrawable::drawImplementation");
}

void CEGuiDrawable::InitCEGUI()
{
using namespace CEGUI;
// initialise the required dirs for the DefaultResourceProvider

DefaultResourceProvider* rp = static_cast<DefaultResourceProvider*>
(System::getSingleton().getResourceProvider());

//注意：这里要修改为下载的CEGUI界面文件对应的目录
rp->setResourceGroupDirectory("imagesets", "datafiles/imagesets/");
rp->setResourceGroupDirectory("fonts", "datafiles/fonts/");
rp->setResourceGroupDirectory("layouts", "datafiles/layouts/");
rp->setResourceGroupDirectory("looknfeels", "datafiles/looknfeel/");
rp->setResourceGroupDirectory("lua_scripts", "datafiles/lua_scripts/");

// set the default resource groups to be used
Imageset::setDefaultResourceGroup("imagesets");
Font::setDefaultResourceGroup("fonts");
Scheme::setDefaultResourceGroup("schemes");
WidgetLookManager::setDefaultResourceGroup("looknfeels");
WindowManager::setDefaultResourceGroup("layouts");
ScriptModule::setDefaultResourceGroup("lua_scripts");

// we will make use of the WindowManager.
WindowManager& winMgr = WindowManager::getSingleton();

// load scheme and set up defaults
SchemeManager::getSingleton().create("TaharezLook.scheme");
System::getSingleton().setDefaultMouseCursor("TaharezLook", "MouseArrow");
FontManager::getSingleton().create("DejaVuSans-10.font");

// create root window
DefaultWindow* root = (DefaultWindow*)winMgr.createWindow("DefaultWindow", "Root");

// set root as the active GUI sheet
System::getSingleton().setGUISheet(root);

// create a FrameWindow for the test
FrameWindow* wnd = (FrameWindow*)winMgr.createWindow("TaharezLook/FrameWindow", "TestWindow");
// add the frame window to the root
root->addChildWindow(wnd);
// set window initial position and size
wnd->setPosition(UVector2(cegui_reldim(0.25f), cegui_reldim( 0.25f)));
wnd->setSize(UVector2(cegui_reldim(0.5f), cegui_reldim( 0.5f)));
// set window text
wnd->setText("UIAE Demo Window");
}

CEGuiDrawable::~CEGuiDrawable()
{
// delete CEGUI??
}



CEGuiEventCallback.h



#pragma once

class CEGuiEventCallback :
public osgGA::GUIEventHandler
{
public:
CEGuiEventCallback(void);
~CEGuiEventCallback(void);
virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa, osg::Object* obj, osg::NodeVisitor* nv);
};



CEGuiEventCallback.cpp



#include "StdAfx.h"
#include "CEGuiEventCallback.h"
#include "CEGuiDrawable.h"

CEGuiEventCallback::CEGuiEventCallback(void)
{
}

CEGuiEventCallback::~CEGuiEventCallback(void)
{
}

bool CEGuiEventCallback::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa, osg::Object* obj, osg::NodeVisitor* nv)
{
osgGA::EventVisitor* ev = dynamic_cast<osgGA::EventVisitor*>(nv);
CEGuiDrawable* cd = dynamic_cast<CEGuiDrawable*>(obj);

if (!ev || !cd) return false;

switch(ea.getEventType())
{
case(osgGA::GUIEventAdapter::DRAG):
case(osgGA::GUIEventAdapter::MOVE):
CEGUI::System::getSingleton().injectMousePosition(ea.getX(),ea.getY());
return true;
case(osgGA::GUIEventAdapter::PUSH):
{
CEGUI::System::getSingleton().injectMousePosition(ea.getX(), ea.getY());

if (ea.getButton() == osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON) // left
CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::LeftButton);

else if (ea.getButton() == osgGA::GUIEventAdapter::MIDDLE_MOUSE_BUTTON) // middle
CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::MiddleButton);

else if (ea.getButton() == osgGA::GUIEventAdapter::RIGHT_MOUSE_BUTTON) // right
CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::RightButton);

return true;
}
case(osgGA::GUIEventAdapter::RELEASE):
{
CEGUI::System::getSingleton().injectMousePosition(ea.getX(), ea.getY());

if (ea.getButton() == osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON) // left
CEGUI::System::getSingleton().injectMouseButtonUp(CEGUI::LeftButton);

else if (ea.getButton() == osgGA::GUIEventAdapter::MIDDLE_MOUSE_BUTTON) // middle
CEGUI::System::getSingleton().injectMouseButtonUp(CEGUI::MiddleButton);

else if (ea.getButton() == osgGA::GUIEventAdapter::RIGHT_MOUSE_BUTTON) // right
CEGUI::System::getSingleton().injectMouseButtonUp(CEGUI::RightButton);

return true;
}
case(osgGA::GUIEventAdapter::DOUBLECLICK):
{
// do we need to do something special here to handle double click??? Will just assume button down for now.
CEGUI::System::getSingleton().injectMousePosition(ea.getX(), ea.getY());

if (ea.getButton() == osgGA::GUIEventAdapter::LEFT_MOUSE_BUTTON) // left
CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::LeftButton);

else if (ea.getButton() == osgGA::GUIEventAdapter::MIDDLE_MOUSE_BUTTON) // middle
CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::MiddleButton);

else if (ea.getButton() == osgGA::GUIEventAdapter::RIGHT_MOUSE_BUTTON) // right
CEGUI::System::getSingleton().injectMouseButtonDown(CEGUI::RightButton);

return true;
}
case(osgGA::GUIEventAdapter::KEYDOWN):
CEGUI::System::getSingleton().injectKeyDown( static_cast<CEGUI::uint>(ea.getKey()) );
CEGUI::System::getSingleton().injectChar( static_cast<CEGUI::utf32>( ea.getKey() ) );
return true;
case(osgGA::GUIEventAdapter::KEYUP):
CEGUI::System::getSingleton().injectKeyUp( static_cast<CEGUI::uint>(ea.getKey()) );
return true;
default:
break;
}

return false;
}





main.cpp



// main.cpp : 定义控制台应用程序的入口点。
//

#include <osgDB/ReadFile>
#include <osgUtil/Optimizer>
#include <osgViewer/Viewer>
#include <osg/CoordinateSystemNode>
#include <osgGA/GUIEventAdapter>

#include <CEGUI.h>
#include <CEGUISystem.h>
#include <RendererModules/OpenGL/CEGUIOpenGLRenderer.h>
#include <CEGUIScriptModule.h>
#include <CEGUIFontManager.h>
#include <CEGUISchemeManager.h>
#include <CEGUIWindowManager.h>
#include <CEGUIExceptions.h>
#include <CEGUIImagesetManager.h>
#include <CEGUIFontManager.h>
#include <CEGUIDefaultResourceProvider.h>
#include "CEGUIPropertyHelper.h" // for string conversions

#include "stdafx.h"
#include "CEGuiDrawable.h"

using namespace osg;
using namespace osgDB;
using namespace osgViewer;

int _tmain(int argc, _TCHAR* argv[])
{
//创建OSG场景的根结点
osg::ref_ptr<osg::Group> rootNode = new osg::Group;
osgViewer::Viewer viewer;

//此句比较关键。因为CEGUI只支持单线程，所以必须在构建CEGuiDrawable类的对象之前调用此句，不然就

//会出现OpenGL资源正在使用中，无法获取的问题。
viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);

//下面两句代码也很关键。其作用是初始化OpenGL环境，如果没有这两句运行后界面将无法显示
viewer.realize();
viewer.getCamera()->getGraphicsContext()->makeCurrent();

osg::Geode *ceguiGeode = new osg::Geode;
CEGuiDrawable *cd = new CEGuiDrawable();
cd->InitCEGUI();
ceguiGeode->addDrawable(cd);

osg::Node *model = osgDB::readNodeFile("glider.osg");
rootNode->addChild(ceguiGeode);
rootNode->addChild(model);
viewer.setSceneData(rootNode.get());
viewer.run();
}