Question

报名参加这个问题。为什么我这样的代码会出错呢？

FuzzyObject.h：

#ifndef FUZZYOBJECT_H
#define FUZZYOBJECT_H

#include <iostream>
#include <d3d9.h>
#include <d3dx9.h>

class FuzzyObject {
public:
    FuzzyObject();
    typedef struct tagFMaterial* FMaterial;
    typedef struct tagFMesh* FMesh;
    typedef struct tagFuzzyForm {
        D3DXVECTOR3 pos;
        D3DXVECTOR3 rot;
        D3DXVECTOR3 scale;
        D3DXVECTOR3 forward;
        D3DXVECTOR3 up;
    } FuzzyForm;

    typedef struct tagObject* Object;

    typedef enum ObjectType {
        FO_STATIC = 0,
        FO_ANIM = 1,
        FO_OBJ = 2,
        FO_CAMERA = 3,
        FO_LIGHT = 4
    } Type;

    typedef enum ObjectCollider {
        BOX = 0,
        SPHERE = 1,
        MESH = 2
    } Collider;

    static FuzzyObject::Object InitializeObj(std::string ObjName, FuzzyObject::ObjectType type, bool render, FuzzyObject::FuzzyForm xform);
    D3DXMATRIX UpdateTransform(FuzzyObject::FuzzyForm xform, FuzzyObject::Object camera);
    void UpdateObject(Object);
    ~FuzzyObject();
};
#endif

FuzzyObject.cpp：

#include <d3d9.h>
#include <d3dx9.h>
#include <iostream>
#include <FuzzyObject.h>
#include <Personality.h>
#include <GFX.h>
#include <d3d9.h>
#include <d3dx9.h>

struct tagFMesh{
    LPD3DXMESH mesh;
    LPD3DXBUFFER adjBuf;
    LPD3DXBUFFER materialBuf;
};

struct tagFMaterial {
    LPD3DXEFFECT Shader;
    LPDIRECT3DTEXTURE9 texture0, texture1, texture2;
    LPDIRECT3DTEXTURE9 bump0, bump1, bump2;
    D3DXVECTOR4 Color;
    D3DXMATRIX MVP;
};

struct tagObject {
    std::string name;
    FuzzyObject::Type type;
    bool Physics;
    FuzzyObject::Collider collider;
    bool renderable;
    FuzzyObject::FuzzyForm transform;
    D3DXMATRIX FFMATRIX;
    Personality::Behaviour CustomCode;
    FuzzyObject::FMaterial materialDef;
    FuzzyObject::FMesh mesh;
};

D3DXMATRIX FuzzyObject::UpdateTransform (FuzzyObject::FuzzyForm xform, FuzzyObject::Object camera) {
    D3DXMATRIX pos, rot, scale;
    D3DXMATRIX M, V, P;
    D3DXMATRIX MVP;

    D3DXMatrixTranslation(&pos, 0.0f, 0.0f, 0.0f);
    D3DXMatrixRotationYawPitchRoll(&rot, D3DXToRadian(xform.rot.x), D3DXToRadian(xform.rot.y), D3DXToRadian(xform.rot.z));
    D3DXMatrixScaling(&scale, xform.scale.x, xform.scale.y, xform.scale.z);
    D3DXMatrixMultiply(&M, &scale, &rot);
    D3DXMatrixMultiply(&M, &rot, &pos);

    D3DXVECTOR3 from = D3DXVECTOR3(camera->transform.pos.x, camera->transform.pos.y, camera->transform.pos.z);
    D3DXVECTOR3 to = D3DXVECTOR3(cos(camera->transform.rot.x*180/D3DX_PI), tan(camera->transform.rot.y*180/D3DX_PI), sin(camera->transform.rot.z*180/D3DX_PI));
    D3DXVECTOR3 up = D3DXVECTOR3(0.0f, 1.0f, 0.0f);

    D3DXMatrixLookAtLH( &V, &from, &to, &up );
    D3DXMatrixPerspectiveFovLH( &P, D3DXToRadian(60.0f), 640/480, 0.01, 1000);

    MVP = M * V * P;
    return MVP;
}

FuzzyObject::Object FuzzyObject::InitializeObj (std::string ObjName, FuzzyObject::ObjectType type,    bool render, FuzzyObject::FuzzyForm xform ) {
    FuzzyObject::Object obj;
    obj->transform = xform;
    obj->name = ObjName;
    obj->type = type;
    obj->renderable = render;
    return obj;
}

void FuzzyObject::UpdateObject(FuzzyObject::Object obj) {
    obj->FFMATRIX = UpdateTransform(obj->transform, NULL);
}

发生的是，我在链接器中收到此错误：

Error: Undefined reference to 'FuzzyObject::InitializeObj()'

来自FuzzyGame.cpp的

，其中调用完成如下：

FuzzyObject::Object obj = FuzzyObject::InitializeObj(/*my parameters g here*/);

有什么想法吗？我不知道为什么要这样做...... :(

Answer 1

调用function()的翻译单元需要与header.o相关联。很可能这在构建系统中没有指定。请制作一个MCVE，这会鼓励人们帮助你。

您必须将Dev-C++项目配置为确认FuzzyObject.h和FuzzyObject.cpp作为FuzzyGame.cpp的依赖项。这样，生成的Makefile将包含正确的链接指令，以解析对FuzzyObject::InitializeObj()的引用。

半条命4祝你好运，我们都期待着它：）。

Answer 2

这是我的makefile人。：）

# Project: FLDR-D3D9
# Makefile created by Dev-C++ 5.7.1

CPP      = g++.exe
CC       = gcc.exe
WINDRES  = windres.exe
RES      = FLDR-D3D9_private.res
OBJ      = GFX.o FuzzyObject.o Personality.o Main.o FuzzyGame.o $(RES)
LINKOBJ  = GFX.o FuzzyObject.o Personality.o Main.o FuzzyGame.o $(RES)
LIBS     = -L"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib32" -L"C:/Program Files (x86)/Dev-  Cpp/MinGW64/x86_64-w64-mingw32/lib32" -static-libgcc -mwindows ../../../../Dev-Cpp/lib/libd3d9.a ../../../../Dev-Cpp/lib/libd3dx9.a ../../../../Dev-Cpp/lib/libpthreadGC2.a -m32
INCS     = -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/x86_64-w64-mingw32/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib/gcc/x86_64-w64-mingw32/4.8.1/include" -I"C:/Users/112mackailj/Documents/DirectX 9 Projects"
CXXINCS  = -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/x86_64-w64-mingw32/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib/gcc/x86_64-w64- mingw32/4.8.1/include" -I"C:/Program Files (x86)/Dev-Cpp/MinGW64/lib/gcc/x86_64-w64-mingw32/4.8.1/include/c++" -I"C:/Users/112mackailj/Documents/DirectX 9 Projects"
BIN      = FLDR-D3D9.exe
CXXFLAGS = $(CXXINCS) -m32
CFLAGS   = $(INCS) -m32
RM       = rm.exe -f

.PHONY: all all-before all-after clean clean-custom

all: all-before $(BIN) all-after

clean: clean-custom
    ${RM} $(OBJ) $(BIN)

$(BIN): $(OBJ)
    $(CPP) $(LINKOBJ) -o $(BIN) $(LIBS)

GFX.o: GFX.cpp
    $(CPP) -c GFX.cpp -o GFX.o $(CXXFLAGS)

FuzzyObject.o: FuzzyObject.cpp
    $(CPP) -c FuzzyObject.cpp -o FuzzyObject.o $(CXXFLAGS)

Personality.o: Personality.cpp 
    $(CPP) -c Personality.cpp -o Personality.o $(CXXFLAGS)

Main.o: Main.cpp
    $(CPP) -c Main.cpp -o Main.o $(CXXFLAGS)

FuzzyGame.o: FuzzyGame.cpp
    $(CPP) -c FuzzyGame.cpp -o FuzzyGame.o $(CXXFLAGS)

FLDR-D3D9_private.res: FLDR-D3D9_private.rc 
    $(WINDRES) -i FLDR-D3D9_private.rc -F pe-i386 --input-format=rc -o FLDR-D3D9_private.res -O coff

如何解决函数FuzzyObject :: InitializeObj（）的未定义引用？

2 个答案: