assimp/code/AssetLib/X/XFileHelper.h

/*
Open Asset Import Library (assimp)
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  following disclaimer.

* Redistributions in binary form must reproduce the above
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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*/

/** @file Defines the helper data structures for importing XFiles */
#ifndef AI_XFILEHELPER_H_INC
#define AI_XFILEHELPER_H_INC

#include <cstdint>
#include <string>
#include <vector>

#include <assimp/anim.h>
#include <assimp/mesh.h>
#include <assimp/quaternion.h>
#include <assimp/types.h>

namespace Assimp {
namespace XFile {

/** Helper structure representing a XFile mesh face */
struct Face {
    std::vector<unsigned int> mIndices;
};

/** Helper structure representing a texture filename inside a material and its potential source */
struct TexEntry {
    std::string mName;
    bool mIsNormalMap; // true if the texname was specified in a NormalmapFilename tag

    TexEntry() AI_NO_EXCEPT :
            mIsNormalMap(false) {
        // empty
    }
    TexEntry(const std::string &pName, bool pIsNormalMap = false) :
            mName(pName), mIsNormalMap(pIsNormalMap) {
        // empty
    }
};

/** Helper structure representing a XFile material */
struct Material {
    std::string mName;
    bool mIsReference; // if true, mName holds a name by which the actual material can be found in the material list
    aiColor4D mDiffuse;
    ai_real mSpecularExponent;
    aiColor3D mSpecular;
    aiColor3D mEmissive;
    std::vector<TexEntry> mTextures;
    size_t sceneIndex; ///< the index under which it was stored in the scene's material list

    Material() AI_NO_EXCEPT :
            mIsReference(false),
            mSpecularExponent(),
            sceneIndex(SIZE_MAX) {
        // empty
    }
};

/** Helper structure to represent a bone weight */
struct BoneWeight {
    unsigned int mVertex;
    ai_real mWeight;
};

/** Helper structure to represent a bone in a mesh */
struct Bone {
    std::string mName;
    std::vector<BoneWeight> mWeights;
    aiMatrix4x4 mOffsetMatrix;
};

/** Helper structure to represent an XFile mesh */
struct Mesh {
    std::string mName;
    std::vector<aiVector3D> mPositions;
    std::vector<Face> mPosFaces;
    std::vector<aiVector3D> mNormals;
    std::vector<Face> mNormFaces;
    unsigned int mNumTextures;
    std::vector<aiVector2D> mTexCoords[AI_MAX_NUMBER_OF_TEXTURECOORDS];
    unsigned int mNumColorSets;
    std::vector<aiColor4D> mColors[AI_MAX_NUMBER_OF_COLOR_SETS];

    std::vector<unsigned int> mFaceMaterials;
    std::vector<Material> mMaterials;

    std::vector<Bone> mBones;

    explicit Mesh(const std::string &pName = std::string()) AI_NO_EXCEPT
            : mName(pName),
              mNumTextures(0),
              mNumColorSets(0) {
        // empty
    }
};

/** Helper structure to represent a XFile frame */
struct Node {
    std::string mName;
    aiMatrix4x4 mTrafoMatrix;
    Node *mParent;
    std::vector<Node *> mChildren;
    std::vector<Mesh *> mMeshes;

    Node() AI_NO_EXCEPT
            : mTrafoMatrix(),
              mParent(nullptr) {
        // empty
    }
    explicit Node(Node *pParent) :
            mTrafoMatrix(), mParent(pParent) {
        // empty
    }

    ~Node() {
        for (unsigned int a = 0; a < mChildren.size(); ++a) {
            delete mChildren[a];
        }
        for (unsigned int a = 0; a < mMeshes.size(); ++a) {
            delete mMeshes[a];
        }
    }
};

struct MatrixKey {
    double mTime;
    aiMatrix4x4 mMatrix;
};

/** Helper structure representing a single animated bone in a XFile */
struct AnimBone {
    std::string mBoneName;
    std::vector<aiVectorKey> mPosKeys; // either three separate key sequences for position, rotation, scaling
    std::vector<aiQuatKey> mRotKeys;
    std::vector<aiVectorKey> mScaleKeys;
    std::vector<MatrixKey> mTrafoKeys; // or a combined key sequence of transformation matrices.
};

/** Helper structure to represent an animation set in a XFile */
struct Animation {
    std::string mName;
    std::vector<AnimBone *> mAnims;

    ~Animation() {
        for (unsigned int a = 0; a < mAnims.size(); a++)
            delete mAnims[a];
    }
};

/** Helper structure analogue to aiScene */
struct Scene {
    Node *mRootNode;

    std::vector<Mesh *> mGlobalMeshes; // global meshes found outside of any frames
    std::vector<Material> mGlobalMaterials; // global materials found outside of any meshes.

    std::vector<Animation *> mAnims;
    unsigned int mAnimTicksPerSecond;

    Scene() AI_NO_EXCEPT
            : mRootNode(nullptr),
              mAnimTicksPerSecond(0) {
        // empty
    }
    ~Scene() {
        delete mRootNode;
        mRootNode = nullptr;
        for (unsigned int a = 0; a < mGlobalMeshes.size(); ++a) {
            delete mGlobalMeshes[a];
        }
        for (unsigned int a = 0; a < mAnims.size(); ++a) {
            delete mAnims[a];
        }
    }
};

} // end of namespace XFile
} // end of namespace Assimp

#endif // AI_XFILEHELPER_H_INC