assimp/code/AssetLib/X/XFileHelper.h

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

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  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the
  following disclaimer in the documentation and/or other
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* Neither the name of the assimp team, nor the names of its
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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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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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*/


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

#include <string>
#include <vector>
#include <stdint.h>

#include <assimp/types.h>
#include <assimp/quaternion.h>
#include <assimp/mesh.h>
#include <assimp/anim.h>
#include <assimp/Defines.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
    : mName()
    , 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 = "") AI_NO_EXCEPT
    : mName( pName )
    , mPositions()
    , mPosFaces()
    , mNormals()
    , mNormFaces()
    , mNumTextures(0)
    , mTexCoords{}
    , mNumColorSets(0)
    , mColors{}
    , mFaceMaterials()
    , mMaterials()
    , mBones() {
        // 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
    : mName()
    , mTrafoMatrix()
    , mParent(nullptr)
    , mChildren()
    , mMeshes() {
        // empty
    }
    explicit Node( Node* pParent)
    : mName()
    , mTrafoMatrix()
    , mParent(pParent)
    , mChildren()
    , mMeshes() {
        // 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)
    , mGlobalMeshes()
    , mGlobalMaterials()
    , 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