Question

我的项目有点窘迫。该语言是C ++，编辑器Visual Studio 2012，它应该是一个光线投射渲染器一旦完成（光线投射位仍然缺失）。为此，我使用数学库Eigen。但是，当我尝试构建时，我收到链接错误。我以前没有多少使用过C ++语言，对这个错误所做的研究对我没有帮助。

以下是编译器的输出：

1>------ Build started: Project: TX52-3DStereo-RT-CUDA, Configuration: Debug x64 ------
1>Build started 06/12/2013 10:55:56.
1>InitializeBuildStatus:
1>  Touching "x64\Debug\TX52-3DStereo-RT-CUDA.unsuccessfulbuild".
1>AddCudaCompilePropsDeps:
1>Skipping target "AddCudaCompilePropsDeps" because all output files are up-to-date with respect to the input files.
1>CudaBuild:
1>  Compiling CUDA source file kernel.cu...
1>  
1>  C:\Users\Satanikas\Documents\Visual Studio 2012\Projects\TX52-3DStereo-RT-CUDA\TX52-3DStereo-RT-CUDA>"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.5\bin\nvcc.exe" -gencode=arch=compute_10,code=\"sm_10,compute_10\" --use-local-env --cl-version 2012 -ccbin "C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin\x86_amd64"  -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.5\include" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.5\include"  -G   --keep-dir x64\Debug -maxrregcount=0  --machine 64 --compile -cudart static  -g   -DWIN64 -D_DEBUG -D_CONSOLE -D_MBCS -Xcompiler "/EHsc /W3 /nologo /Od /Zi /RTC1 /MDd  " -o x64\Debug\kernel.cu.obj "C:\Users\Satanikas\Documents\Visual Studio 2012\Projects\TX52-3DStereo-RT-CUDA\TX52-3DStereo-RT-CUDA\kernel.cu" 
1>c:\users\satanikas\documents\visual studio 2012\common\inc\eigen\src/Core/arch/SSE/PacketMath.h(169): warning : controlling expression is constant
1>  
1>c:\users\satanikas\documents\visual studio 2012\common\inc\eigen\src/Core/Block.h(102): error : "operator=" has already been declared in the current scope
1>            detected during instantiation of class "Eigen::Block<XprType, BlockRows, BlockCols, InnerPanel> [with XprType=VectorType, BlockRows=<expression>, BlockCols=<expression>, InnerPanel=false]" 
1>  c:\users\satanikas\documents\visual studio 2012\common\inc\eigen\src/Core/VectorBlock.h(58): here
1>  
1>c:\users\satanikas\documents\visual studio 2012\common\inc\eigen\src/Core/Ref.h(122): error : "operator=" has already been declared in the current scope
1>            detected during instantiation of class "Eigen::RefBase<Derived> [with Derived=Eigen::Ref<PlainObjectType, Options, StrideType>]" 
1>  (183): here
1>  
1>c:\users\satanikas\documents\visual studio 2012\common\inc\eigen\src/Core/products/Parallelizer.h(20): warning : variable "m_maxThreads" was set but never used
1>  
1>c:\users\satanikas\documents\visual studio 2012\common\inc\eigen\src/Geometry/RotationBase.h(76): error : function template "Eigen::operator*(const Eigen::EigenBase<OtherDerived> &, const Eigen::Quaternion<_Scalar, _Options> &)" has already been defined
1>            detected during:
1>              instantiation of class "Eigen::RotationBase<Derived, _Dim> [with Derived=Eigen::Quaternion<_Scalar, _Options>, _Dim=3]" 
1>  c:\users\satanikas\documents\visual studio 2012\common\inc\eigen\src/Geometry/Quaternion.h(35): here
1>              instantiation of class "Eigen::QuaternionBase<Derived> [with Derived=Eigen::Quaternion<_Scalar, _Options>]" 
1>  c:\users\satanikas\documents\visual studio 2012\common\inc\eigen\src/Geometry/Quaternion.h(236): here
1>  
1>  3 errors detected in the compilation of "C:/Users/SATANI~1/AppData/Local/Temp/tmpxft_000010c8_00000000-5_kernel.cpp1.ii".
1>C:\Program Files (x86)\MSBuild\Microsoft.Cpp\v4.0\V110\BuildCustomizations\CUDA 5.5.targets(592,9): error MSB3721: The command ""C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.5\bin\nvcc.exe" -gencode=arch=compute_10,code=\"sm_10,compute_10\" --use-local-env --cl-version 2012 -ccbin "C:\Program Files (x86)\Microsoft Visual Studio 11.0\VC\bin\x86_amd64"  -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.5\include" -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v5.5\include"  -G   --keep-dir x64\Debug -maxrregcount=0  --machine 64 --compile -cudart static  -g   -DWIN64 -D_DEBUG -D_CONSOLE -D_MBCS -Xcompiler "/EHsc /W3 /nologo /Od /Zi /RTC1 /MDd  " -o x64\Debug\kernel.cu.obj "C:\Users\Satanikas\Documents\Visual Studio 2012\Projects\TX52-3DStereo-RT-CUDA\TX52-3DStereo-RT-CUDA\kernel.cu"" exited with code 2.
1>
1>Build FAILED.
1>
1>Time Elapsed 00:00:03.40
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

错误来自3个类，这是它们的标题：

#pragma once

#include <Eigen\Geometry>

class TransformedObject
{
public:
    TransformedObject(void);
    ~TransformedObject(void);

    void rotate(const Eigen::Quaternionf&);
    void setRotation(const Eigen::Quaternionf&);
    void translate(const Eigen::Vector3f&);
    void setTranslation(const Eigen::Vector3f&);
    void scale(const float&);
    const Eigen::Matrix4f getMatrix(void);

    Eigen::Transform<float, 3, Eigen::Affine> transform;
};


#pragma once

#include "TransformedObject.h"

class Camera
{
public:
    Camera(void);
    ~Camera(void);
    void computeRays();
    void setFOV(float angle);
    void setResolution(int w, int h);
private:
    TransformedObject transformation;
    float fov;
    unsigned int width;
    unsigned int height;
    float* raysDirections;
    Eigen::Vector3f raysOrigin;
};


#pragma once

#include <forward_list>
#include "TransformedObject.h"

class ScenegraphNode
{
public:
    ScenegraphNode(void);
    ~ScenegraphNode(void);
private:
    TransformedObject transformation;
    size_t sceneHash;
    std::forward_list<ScenegraphNode*> children;

    int countVertices() const;
};

正如你所看到的，有一个＆＃34; pragma一次＆＃34;在所有类中，特征类都由ifndef / define / endif保护。

我收集的是，这可能是由于我的代码是由不同的TU编译的，其中包括Eigen，因此所有＆＃34;已经定义了＆＃34;错误。但是我不知道如何纠正这个问题（我不能使用extern，因为我使用我的类TransformedObject作为其他类的成员）。

提前致谢，

Answer 1

复制user3073879（提交者）评论：

＆＃34; 问题解决了，我从包含声明为Camera的主机功能的文件中删除了所有CUDA代码。（这是一个测试功能）。这意味着它确实是NVCC的问题＆＃34;

将此问题标记为已回答。

VS2012抱怨曾经有过“已经定义好”的课程

1 个答案: