assimp/code/Common/ScenePrivate.h

/*
Open Asset Import Library (assimp)
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*/

/** @file Stuff to deal with aiScene::mPrivate
 */
#pragma once
#ifndef AI_SCENEPRIVATE_H_INCLUDED
#define AI_SCENEPRIVATE_H_INCLUDED

#include <assimp/ai_assert.h>
#include <assimp/scene.h>

namespace Assimp {

// Forward declarations
class Importer;

struct ScenePrivateData {
    //  The struct constructor.
    ScenePrivateData() AI_NO_EXCEPT;

    // Importer that originally loaded the scene though the C-API
    // If set, this object is owned by this private data instance.
    Assimp::Importer* mOrigImporter;

    // List of post-processing steps already applied to the scene.
    unsigned int mPPStepsApplied;

    // true if the scene is a copy made with aiCopyScene()
    // or the corresponding C++ API. This means that user code
    // may have made modifications to it, so mPPStepsApplied
    // and mOrigImporter are no longer safe to rely on and only
    // serve informative purposes.
    bool mIsCopy;
};

inline
ScenePrivateData::ScenePrivateData() AI_NO_EXCEPT
: mOrigImporter( nullptr )
, mPPStepsApplied( 0 )
, mIsCopy( false ) {
    // empty
}

// Access private data stored in the scene
inline
ScenePrivateData* ScenePriv(aiScene* in) {
    ai_assert( nullptr != in );
    if ( nullptr == in ) {
        return nullptr;
    }
    return static_cast<ScenePrivateData*>(in->mPrivate);
}

inline
const ScenePrivateData* ScenePriv(const aiScene* in) {
    ai_assert( nullptr != in );
    if ( nullptr == in ) {
        return nullptr;
    }
    return static_cast<const ScenePrivateData*>(in->mPrivate);
}

} // Namespace Assimp

#endif // AI_SCENEPRIVATE_H_INCLUDED