OSG+Duilib显示osg

我会带着你远行 2022-08-23 09:57 180阅读 0赞

[OSG+VS2015+Win10配置][OSG_VS2015_Win10]

[OSG-Win32窗口显示osg][OSG-Win32_osg]

今天就分享一下duilib中如何显示osg。

duilib库这里不作过多的介绍，duilib的配置也很简单。

我们直接新建一个win32工程：

**xml文件**

<?xml version="1.0" encoding="UTF-8"?>
    
    <Window size="1900,950" caption="0,0,0,32" roundcorner="2,2">
      <Font id="0" name="微软雅黑" size="12" bold="false"/>
      <Font id="1" name="微软雅黑" size="14" bold="false"/>
      <Font id="2" name="微软雅黑" size="13" bold="true"/>
      
      <VerticalLayout bkcolor="FFF6F6FA">
       <VerticalLayout name="BrowserClientLayout" bkcolor="FFF6F6F6"/> 
      </VerticalLayout >
    </Window>

新建头文件  
**main\_windows.h**  
用于定义我们的窗口类：

#include "UIlib.h"
    
    class OsgWnd : public DuiLib::WindowImplBase {
    public:
    
      OsgWnd() {}
    
      virtual ~OsgWnd() {}
    
    protected:
    
      // Override --------------------------------------------------------
    
      virtual LPCTSTR GetWindowClassName() const override { return _T("OsgWnd"); }
    
      virtual DuiLib::CDuiString GetSkinFile() override { return _T("main.xml"); }
    
      virtual DuiLib::CDuiString GetSkinFolder() override { return _T(""); }
    
      virtual void InitWindow() override;
    
      virtual void OnFinalMessage(HWND hWnd) override;
    
      virtual LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) override;
    
      virtual void Notify(DuiLib::TNotifyUI& msg) override;
    
      virtual LRESULT HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam) override;
    
    private:
    
    };

接下来实现OsgWnd ：  
新建源文件  
**main\_window.cc**

#include "main_window.h"
    
    #include<map>
    
    #include <osgViewer/Viewer>
    #include <osgViewer/ViewerEventHandlers>
    #include <osgViewer/api/win32/GraphicsWindowWin32>
    #include <osgUtil/Optimizer>
    #include <osgGA/TrackballManipulator>
    #include <osgDB/ReadFile>
    #include <process.h>
    
    osg::ref_ptr<osgViewer::Viewer> viewer;
    osg::observer_ptr<osgViewer::GraphicsWindow> window;
    osg::ref_ptr<osg::Group> root;
    osg::ref_ptr<osg::Node> loadedModel;
    osgUtil::Optimizer optimizer;
    osg::ref_ptr<osg::GraphicsContext::Traits> traits;
    osg::ref_ptr<osg::Referenced> windata;
    osg::GraphicsContext* gc;
    osg::ref_ptr<osg::Camera> camera;
    bool renderok;
    
    
    
    LRESULT OsgWnd::OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) {
      LRESULT res = __super::OnCreate(uMsg, wParam, lParam, bHandled);
    
      LONG styleValue = ::GetWindowLong(*this, GWL_STYLE);
      styleValue &= ~WS_CAPTION;
      ::SetWindowLong(*this, GWL_STYLE, styleValue | WS_CLIPSIBLINGS | WS_CLIPCHILDREN);
    
    
      return res;
    }
    
    void render(void* ptr)
    {
      while (!viewer->done())
      {
        viewer->frame();
      }
      renderok = true;
    }
    
    void OsgWnd::InitWindow() {
      root = new osg::Group;
      loadedModel = osgDB::readNodeFile("cessna.osg");
      optimizer.optimize(loadedModel.get());
      optimizer.reset();
      root->addChild(loadedModel.get());
      traits = new osg::GraphicsContext::Traits;
      windata = new osgViewer::GraphicsWindowWin32::WindowData(m_hWnd);
      traits->x = 10;
      traits->y = 20;
      traits->width = 100;
      traits->height = 80;
      traits->windowDecoration = false;
      traits->doubleBuffer = true;
      traits->sharedContext = 0;
      traits->inheritedWindowData = windata;
      traits->setInheritedWindowPixelFormat = true;
      gc = osg::GraphicsContext::createGraphicsContext(traits.get());
      camera = new osg::Camera;
      camera->setGraphicsContext(gc);
      camera->setViewport(new osg::Viewport(traits->x, traits->y, traits->width, traits->height));
      viewer = new osgViewer::Viewer;
      viewer->addSlave(camera.get());
      viewer->setSceneData(root.get());
      viewer->setCameraManipulator(new osgGA::TrackballManipulator);
      viewer->addEventHandler(new osgViewer::StatsHandler);
      viewer->setThreadingModel(osgViewer::Viewer::SingleThreaded);
      viewer->realize();
      renderok = false;
      _beginthread(render, 0, NULL);
    }
    
    void OsgWnd::OnFinalMessage(HWND hWnd) {
    
    }
    
    void OsgWnd::Notify(DuiLib::TNotifyUI& msg) {
    
      __super::Notify(msg);
    }
    
    LRESULT OsgWnd::HandleMessage(UINT uMsg, WPARAM wParam, LPARAM lParam) {
      return __super::HandleMessage(uMsg, wParam, lParam);
    }

新建源文件  
**main.cc**：

#include "UIlib.h" 
    #include "main_window.h"
    using namespace DuiLib;
    #ifdef _DEBUG 
    # ifdef _UNICODE 
    # pragma comment(lib, "DuiLib_ud.lib") 
    # else 
    # pragma comment(lib, "DuiLib_d.lib") 
    # endif 
    #else 
    # ifdef _UNICODE 
    # pragma comment(lib, "DuiLib_u.lib") 
    # else 
    # pragma comment(lib, "DuiLib.lib") 
    # endif 
    #endif 
    
    using DuiLib::CPaintManagerUI;
    
    int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
    {
      CPaintManagerUI::SetInstance(hInstance);
      CPaintManagerUI::SetResourcePath(CPaintManagerUI::GetInstancePath());   
    
      OsgWnd duiFrame;
      duiFrame.Create(NULL, _T("DUIWnd"), UI_WNDSTYLE_FRAME, WS_EX_WINDOWEDGE);
      duiFrame.CenterWindow();
      duiFrame.ShowModal();
      return 0;
    }

运行结果：  
![这里写图片描述][20160613232510338]

**notice**  
这个跟之前的win32程序下显示osg没有什么大的区别，注意这个：

**windata = new osgViewer::GraphicsWindowWin32::WindowData(m\_hWnd);**

如果注释上面的这句话，运行结果为  
![这里写图片描述][20160613232925437]

可以看到osg与duilib没有了任何关系，osg显示为  
traits->x = 10;  
traits->y = 20;  
traits->width = 100;  
traits->height = 80;

[OSG_VS2015_Win10]: http://blog.csdn.net/wangshubo1989/article/details/51591802
[OSG-Win32_osg]: http://blog.csdn.net/wangshubo1989/article/details/51599172
[20160613232510338]: /images/20220721/d91932bfac554a7c850facd323722ed6.png
[20160613232925437]: /images/20220721/58ed61d273c94afaaed4d008a4b155bb.png