C++ 相同的声明和类型编译器错误。（xyz*类型的参数与xyz*类型的参数不兼容）

在这里尝试创建一个基本类

头文件

namespace Ogre
{
    class Vector3;
    class SceneManager;
    class Entity;
    class Quaternion;
}

class RayCasting
{
public:
    bool RayCastFromPoint(
        const Ogre::Vector3 &point, 
        const Ogre::Vector3 &normal, 
        Ogre::Vector3 &result, 
        Ogre::SceneManager& scnMgrRef);

private:
    void GetMeshInformation(
        Ogre::Entity* entity,
        Ogre::Vector3* vertices,
        size_t &indexCount,
        unsigned long* indices,
        const Ogre::Vector3& position,
        const Ogre::Quaternion& orient,
        const Ogre::Vector3& scale
    );
};

#include "RayCasting.h"

#include <OGRE/OgreMath.h>
#include <OgreRay.h>
#include <OgreSceneManager.h>
#include <OgreEntity.h>
#include <OgreSceneNode.h>
#include <OgreNode.h>
#include <OgreMath.h>
#include <OgreSubMesh.h>
#include <OgreSubEntity.h>
#include <OgreMesh.h>
#include <OGRE/OgreVector3.h>

bool RayCasting::RayCastFromPoint(
    const Ogre::Vector3 & point, 
    const Ogre::Vector3 & normal, 
    Ogre::Vector3 & result, 
    Ogre::SceneManager& scnMgrRef)
{
    // get the entity to check
    Ogre::Entity *collEntity = static_cast<Ogre::Entity*>(rayQueryResult[index].movable);

    // mesh data to retrieve         
    size_t indexCount;
    Ogre::Vector3* vertices = new Ogre::Vector3();
    unsigned long* indices;

    // get the mesh information
    GetMeshInformation(collEntity, vertices, indexCount, indices,
        collEntity->getParentNode()->_getDerivedPosition()      // Returns a const Vector3
        collEntity->getParentNode()->_getDerivedOrientation(),  // Returns a const Vector3
        collEntity->getParentNode()->_getDerivedScale());       // Returns a const Vector3
    ... 
}

void RayCasting::GetMeshInformation(
    Ogre::Entity * entity, 
    Ogre::Vector3* vertices, 
    size_t & indexCount, 
    unsigned long * indices, 
    const Ogre::Vector3 & position, 
    const Ogre::Quaternion & orient, 
    const Ogre::Vector3 & scale)
{
    ...
}

源文件

namespace Ogre
{
    class Vector3;
    class SceneManager;
    class Entity;
    class Quaternion;
}

class RayCasting
{
public:
    bool RayCastFromPoint(
        const Ogre::Vector3 &point, 
        const Ogre::Vector3 &normal, 
        Ogre::Vector3 &result, 
        Ogre::SceneManager& scnMgrRef);

private:
    void GetMeshInformation(
        Ogre::Entity* entity,
        Ogre::Vector3* vertices,
        size_t &indexCount,
        unsigned long* indices,
        const Ogre::Vector3& position,
        const Ogre::Quaternion& orient,
        const Ogre::Vector3& scale
    );
};

#include "RayCasting.h"

#include <OGRE/OgreMath.h>
#include <OgreRay.h>
#include <OgreSceneManager.h>
#include <OgreEntity.h>
#include <OgreSceneNode.h>
#include <OgreNode.h>
#include <OgreMath.h>
#include <OgreSubMesh.h>
#include <OgreSubEntity.h>
#include <OgreMesh.h>
#include <OGRE/OgreVector3.h>

bool RayCasting::RayCastFromPoint(
    const Ogre::Vector3 & point, 
    const Ogre::Vector3 & normal, 
    Ogre::Vector3 & result, 
    Ogre::SceneManager& scnMgrRef)
{
    // get the entity to check
    Ogre::Entity *collEntity = static_cast<Ogre::Entity*>(rayQueryResult[index].movable);

    // mesh data to retrieve         
    size_t indexCount;
    Ogre::Vector3* vertices = new Ogre::Vector3();
    unsigned long* indices;

    // get the mesh information
    GetMeshInformation(collEntity, vertices, indexCount, indices,
        collEntity->getParentNode()->_getDerivedPosition()      // Returns a const Vector3
        collEntity->getParentNode()->_getDerivedOrientation(),  // Returns a const Vector3
        collEntity->getParentNode()->_getDerivedScale());       // Returns a const Vector3
    ... 
}

void RayCasting::GetMeshInformation(
    Ogre::Entity * entity, 
    Ogre::Vector3* vertices, 
    size_t & indexCount, 
    unsigned long * indices, 
    const Ogre::Vector3 & position, 
    const Ogre::Quaternion & orient, 
    const Ogre::Vector3 & scale)
{
    ...
}

及

问题2 GetMeshInformation（…，顶点…）抛出一个E0167错误，指出

cannot convert to incomplete class "const Ogre::Vector3"    Ogre3DProjectTemplate   E:\_PROGRAMMING\GEA-term2\Ogre_Projects\Tutorials2\Ogre3DProjectTemplate\RayCasting.cpp 91  

问题3 此外，GetMeshInformation（…，…->_GetDerivedPosition（），…）行生成一个E0515错误声明

declaration is incompatible with "bool RayCasting::RayCastFromPoint(const Ogre::Vector3 &point, const Ogre::Vector3 &normal, Ogre::Vector3 &result, Ogre::SceneManager &scnMgrRef)" (declared at line 20 of "E:\_PROGRAMMING\GEA-term2\Ogre_Projects\Tutorials2\Ogre3DProjectTemplate\RayCasting.h")    Ogre3DProjectTemplate   E:\_PROGRAMMING\GEA-term2\Ogre_Projects\Tutorials2\Ogre3DProjectTemplate\RayCasting.cpp 29  
`

*"cannot convert to incomplete class const Ogre::Vector3"*, despite the include being present in the Source file. The scale() method also throws this error.

简单来说，我的问题是：

---

什么。见鬼去吧。正在发生。

显然，通过放弃并在头文件中包含OgreMath.h，可以解决头文件中转发声明Ogre:：Vectrat的所有问题。

1）除了提供消息外，请复制粘贴消息，而不是转述消息。2） 标题包含声明

void GetMeshInformation（…，Ogre:：Vector3*顶点，…）

，而定义是

void RayCasting:：GetMeshInformation（…，Ogre:：Vector3*&顶点，…）

（与

索引的区别类似）。@AlgirdasPreidžius嘿，对不起。我已经粘贴了消息，这应该是最小的和完整的，但没有食人魔可能无法验证。我已经在2中做了更改，不敢相信我错过了，但这个问题仍然没有解决（请阅读链接）。例如，一些错误提示您转发声明的类，而不是在使用时定义的类。因此，即使定义在
OGRE/OgreVector3.h
中，也不清楚这些定义是否在
OGRE
名称空间中进行，它们在名称空间中被向前声明。