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- Compiling... 
- tutorial.cpp 
- Linking... 
- tutorial.obj : error LNK2001: unresolved external symbol "public: __thiscall BoxPrimitive::BoxPrimitive(class dSceneNode *,class dMatrix const &,class dVector const &,int)" (??0BoxPrimitive@@QAE@PAVdSceneNode@@ABVdMatrix@@ABVdVector@@H@Z) 
- tutorial.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall RenderPrimitive::~RenderPrimitive(void)" (??1RenderPrimitive@@UAE@XZ) 
- Debug tutorial.exe : fatal error LNK1120: 2 unresolved externals 
- Error executing link.exe. 
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- tutorial.exe - 3 error(s), 0 warning(s)  
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