我這個人記性不好，學(xué)過的東西老是愛忘，學(xué)得越多忘得越快，腦子和我可憐的硬盤一樣容量比較小，所以我發(fā)現(xiàn)我不得不把有些東西記錄下來。其實學(xué)一樣?xùn)|西關(guān)鍵在于多學(xué)多用，有道是書讀百遍其意自現(xiàn)，對于我這種比較笨又沒天賦的人來說可謂金玉良言了。
以上算前言吧，下邊才是正文。
Ogre這個引擎的效率不知道實際應(yīng)用起來如何，但是聽說結(jié)構(gòu)倒是比較好的。選擇它來學(xué)習(xí)主要是因為它開源，而且是C++和Dx寫的，關(guān)鍵還有資料比較多，國內(nèi)研究的也比較多，也有一些教程，不過Ogre不斷推出新版本，許多教程都有點過期了。要了解最新的使用方法還得看官方的教程。我也是直接看官方的教程，但是英文一般，每次打開大片英文頁面看著的確比較迷糊，所以我打算把里面一些重要的關(guān)鍵部分節(jié)選出來以備參考，有時候可以快速的重溫，比如這篇要介紹的如何配置Ogre，需要記嗎？程序員記不了那么多啦，用的時候再查。當(dāng)然Ogre也在持續(xù)更新，如果我個人還在持續(xù)學(xué)習(xí)使用Ogre，那么我也會持續(xù)更新這些教程的，如果你是Ogre的使用者記得來我的Blog：http://m.shnenglu.com/singohgod 看看吧，希望能對大家有點幫助。
首先安裝SDK，可以編譯里面帶的示例看看一些效果展示。編譯源碼就得下載源碼吧，記得還要下一個Dependencies，解壓到源碼目錄就可以了，編譯應(yīng)該能通過的，我這里沒有遇到問題。
不要被繁多的目錄和文件嚇著了，其實運行Ogre程序只需要下列庫和文件：
OGRE Libraries & Files
- OGRE libraries (OgreMain[_d].dll, OgrePlatform[_d].dll or libOgreMain.so, libOgrePlatform.so for linux).
- plugins.cfg - Text file specifying the rendering libraries available to Ogre (ie DX9, OpenGL).
- All the plugin libraries listed in plugins.cfg (you can remove items from plugins.cfg if you don't wish to use them).
- resources.cfg - If using the ExampleApplication, a text file specifing paths to materials, textures, models, etc.
- OgreCore.zip - Ensure resources.cfg has the proper path to this file if you plan to use the OGRE debug panel or profiler.
- Other Resources used in your program (*.zip; *.png; *.particle; *.mesh; ...).
還需要其他的第三方庫：
These are required:
- Zlib: zlib1.dll; libz.so (debian: zlib1g, zlib1g-dev)
- DevIL: devil.dll, ilu.dll, ilut.dll; libIL.so, libILU.so (debian: libdevil1, libdevil-dev)
These are optional:
- CEGUI: OgreGUIRenderer[_d].dll, CEGUIBase[_d].dll, CEGUITaharezLook[_d].dll, CEGUIWindowsLook[_d].dll, xerces-c_2_5_0.dll
- CEGUI: libCEGUIBase.so, libCEGUIOgreRenderer.so, libxerces-c.so (debian: libcegui-mk2-0, libcegui-mk2-dev, libxerces26, libxerces26-dev)
- Cg: cg.dll; libCg.so (debian: nvidia-cg-toolkit)
- OpenEXR: openexr.dll??; (debian: libopenexr-dev libopenexr2 )
- ReferenceApp: ReferenceAppLayer.dll
不同的編譯器還需要有：
Extras for Microsoft Visual C++ 6 (SP3+)
- stlport_vc6[_stldebug]46.dll
- msvcp60[D].dll
- msvcrt[D].dll
- Extras for Microsoft Visual C++.Net 2002
- stlport_vc7[_stldebug]46.dll
- msvcp70[d].dll
- msvcr70[d].dll
- Extras for Microsoft Visual C++.Net 2003
- msvcp71[d].dll
- msvcr71[d].dll
- Extras for Mingw + STLPort
- libstlport[stlg].5.0.dll
- mingwm10.dll
設(shè)置環(huán)境變量：
If you downloaded and installed the precompiled OGRE SDK, you should already have an environment variable called 'OGRE_HOME' registered already, pointing at the folder where you installed. If it isn't there you probably installed under a different user, so define OGRE_HOME manually
If you downloaded the source distribution, you should register a new environment variable OGRE_SRC pointing at the 'ogrenew' folder from the OGRE source
Ogre源碼項目的目錄結(jié)構(gòu)：
work_dir
include
*.h
src
*.cpp
scripts
*.vcproj
新建項目也依據(jù)這個結(jié)構(gòu)，你的項目應(yīng)該有這些文件夾：'bin', 'include', 'media', 'testsolution', 'scripts', and 'src'
修改新項目的屬性：
Debugging : Working Directory = ..\bin\Debug
C/C++ : Preprocessor : Preprocessor Definitions += _STLP_DEBUG (only in Debug mode, not needed for .Net 2003 and 2005)
C/C++ : Code Generation : Use runtime library = Multithreaded Debug DLL (Multithreaded DLL in Release)
Linker : General : Output File = ..\bin\Debug\[appname].exe
Linker : Input : Additional Dependencies += OgreMain_d.lib (OgreMain.lib in Release)
如果你是安裝SDK:
C/C++ : General : Additional Include Directories = ..\include;$(OGRE_HOME)\include;$(OGRE_HOME)\samples\include
Linker : General : Additional Library Directories = $(OGRE_HOME)\lib
如果你是編譯源碼:
C/C++ : General : Additional Include Directories = ..\include;$(OGRE_SRC)\OgreMain\include;$(OGRE_SRC)\Samples\Common\Include
Linker : General : Additional Library Directories = $(OGRE_SRC)\OgreMain\Lib\Debug
這些設(shè)置好以后你就可以新建一個SampleApp.cpp文件，然后拷貝如下代碼：
#include "ExampleApplication.h"
// Declare a subclass of the ExampleFrameListener class
class MyListener : public ExampleFrameListener
{
public:
MyListener(RenderWindow* win, Camera* cam) : ExampleFrameListener(win, cam)
{
}
bool frameStarted(const FrameEvent& evt)
{
return ExampleFrameListener::frameStarted(evt);
}
bool frameEnded(const FrameEvent& evt)
{
return ExampleFrameListener::frameEnded(evt);
}
};
// Declare a subclass of the ExampleApplication class
class SampleApp : public ExampleApplication
{
public:
SampleApp()
{
}
protected:
// Define what is in the scene
void createScene(void)
{
// put your scene creation in here
}
// Create new frame listener
void createFrameListener(void)
{
mFrameListener = new MyListener(mWindow, mCamera);
mRoot->addFrameListener(mFrameListener);
}
};
#ifdef __cplusplus
extern "C" {
#endif
#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
#define WIN32_LEAN_AND_MEAN
#include "windows.h"
INT WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT)
#else
int main(int argc, char **argv)
#endif
{
// Instantiate our subclass
SampleApp myApp;
try {
// ExampleApplication provides a go method, which starts the rendering.
myApp.go();
}
catch (Ogre::Exception& e) {
#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
MessageBoxA(NULL, e.getFullDescription().c_str(), "An exception has occured!", MB_OK | MB_ICONERROR | MB_TASKMODAL);
#else
std::cerr << "Exception:\n";
std::cerr << e.getFullDescription().c_str() << "\n";
#endif
return 1;
}
return 0;
}
#ifdef __cplusplus
}
#endif
未完！