mesh.h

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/*
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Open Asset Import Library (assimp)
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*/
 
#pragma once
#ifndef AI_MESH_H_INC
#define AI_MESH_H_INC
 
#ifdef __GNUC__
#pragma GCC system_header
#endif
 
#ifdef _WIN32
#pragma warning(disable : 4351)
#endif // _WIN32
 
#include <assimp/aabb.h>
#include <assimp/types.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
// ---------------------------------------------------------------------------
// Limits. These values are required to match the settings Assimp was
// compiled against. Therefore, do not redefine them unless you build the
// library from source using the same definitions.
// ---------------------------------------------------------------------------
 
#ifndef AI_MAX_FACE_INDICES
#define AI_MAX_FACE_INDICES 0x7fff
#endif
 
#ifndef AI_MAX_BONE_WEIGHTS
#define AI_MAX_BONE_WEIGHTS 0x7fffffff
#endif
 
#ifndef AI_MAX_VERTICES
#define AI_MAX_VERTICES 0x7fffffff
#endif
 
#ifndef AI_MAX_FACES
#define AI_MAX_FACES 0x7fffffff
#endif
 
#ifndef AI_MAX_NUMBER_OF_COLOR_SETS
#define AI_MAX_NUMBER_OF_COLOR_SETS 0x8
#endif // !! AI_MAX_NUMBER_OF_COLOR_SETS
 
#ifndef AI_MAX_NUMBER_OF_TEXTURECOORDS
#define AI_MAX_NUMBER_OF_TEXTURECOORDS 0x8
#endif // !! AI_MAX_NUMBER_OF_TEXTURECOORDS
 
// ---------------------------------------------------------------------------
struct aiFace {
    unsigned int mNumIndices;
 
    unsigned int *mIndices;
 
#ifdef __cplusplus
 
    aiFace() AI_NO_EXCEPT
            : mNumIndices(0),
              mIndices(nullptr) {
        // empty
    }
 
    ~aiFace() {
        delete[] mIndices;
    }
 
    aiFace(const aiFace &o) :
            mNumIndices(0), mIndices(nullptr) {
        *this = o;
    }
 
    aiFace &operator=(const aiFace &o) {
        if (&o == this) {
            return *this;
        }
 
        delete[] mIndices;
        mNumIndices = o.mNumIndices;
        if (mNumIndices) {
            mIndices = new unsigned int[mNumIndices];
            ::memcpy(mIndices, o.mIndices, mNumIndices * sizeof(unsigned int));
        } else {
            mIndices = nullptr;
        }
 
        return *this;
    }
 
    bool operator==(const aiFace &o) const {
        if (mIndices == o.mIndices) {
            return true;
        }
 
        if (nullptr != mIndices && mNumIndices != o.mNumIndices) {
            return false;
        }
 
        if (nullptr == mIndices) {
            return false;
        }
 
        for (unsigned int i = 0; i < this->mNumIndices; ++i) {
            if (mIndices[i] != o.mIndices[i]) {
                return false;
            }
        }
 
        return true;
    }
 
    bool operator!=(const aiFace &o) const {
        return !(*this == o);
    }
#endif // __cplusplus
}; // struct aiFace
 
// ---------------------------------------------------------------------------
struct aiVertexWeight {
    unsigned int mVertexId;
 
    ai_real mWeight;
 
#ifdef __cplusplus
 
    aiVertexWeight() AI_NO_EXCEPT
            : mVertexId(0),
              mWeight(0.0f) {
        // empty
    }
 
    aiVertexWeight(unsigned int pID, float pWeight) :
            mVertexId(pID), mWeight(pWeight) {
        // empty
    }
 
    bool operator==(const aiVertexWeight &rhs) const {
        return (mVertexId == rhs.mVertexId && mWeight == rhs.mWeight);
    }
 
    bool operator!=(const aiVertexWeight &rhs) const {
        return (*this == rhs);
    }
 
#endif // __cplusplus
};
 
// Forward declare aiNode (pointer use only)
struct aiNode;
 
// ---------------------------------------------------------------------------
struct aiBone {
    C_STRUCT aiString mName;
 
    unsigned int mNumWeights;
 
#ifndef ASSIMP_BUILD_NO_ARMATUREPOPULATE_PROCESS
    // The bone armature node - used for skeleton conversion
    // you must enable aiProcess_PopulateArmatureData to populate this
    C_STRUCT aiNode *mArmature;
 
    // The bone node in the scene - used for skeleton conversion
    // you must enable aiProcess_PopulateArmatureData to populate this
    C_STRUCT aiNode *mNode;
 
#endif
    C_STRUCT aiVertexWeight *mWeights;
 
    C_STRUCT aiMatrix4x4 mOffsetMatrix;
 
#ifdef __cplusplus
 
    aiBone() AI_NO_EXCEPT
            : mName(),
              mNumWeights(0),
              mWeights(nullptr),
              mOffsetMatrix() {
        // empty
    }
 
    aiBone(const aiBone &other) :
            mName(other.mName),
            mNumWeights(other.mNumWeights),
            mWeights(nullptr),
            mOffsetMatrix(other.mOffsetMatrix) {
        if (other.mWeights && other.mNumWeights) {
            mWeights = new aiVertexWeight[mNumWeights];
            ::memcpy(mWeights, other.mWeights, mNumWeights * sizeof(aiVertexWeight));
        }
    }
 
    aiBone &operator=(const aiBone &other) {
        if (this == &other) {
            return *this;
        }
 
        mName = other.mName;
        mNumWeights = other.mNumWeights;
        mOffsetMatrix = other.mOffsetMatrix;
 
        if (other.mWeights && other.mNumWeights) {
            if (mWeights) {
                delete[] mWeights;
            }
 
            mWeights = new aiVertexWeight[mNumWeights];
            ::memcpy(mWeights, other.mWeights, mNumWeights * sizeof(aiVertexWeight));
        }
 
        return *this;
    }
 
    bool operator==(const aiBone &rhs) const {
        if (mName != rhs.mName || mNumWeights != rhs.mNumWeights) {
            return false;
        }
 
        for (size_t i = 0; i < mNumWeights; ++i) {
            if (mWeights[i] != rhs.mWeights[i]) {
                return false;
            }
        }
 
        return true;
    }
    ~aiBone() {
        delete[] mWeights;
    }
#endif // __cplusplus
};
 
// ---------------------------------------------------------------------------
enum aiPrimitiveType {
    aiPrimitiveType_POINT = 0x1,
 
    aiPrimitiveType_LINE = 0x2,
 
    aiPrimitiveType_TRIANGLE = 0x4,
 
    aiPrimitiveType_POLYGON = 0x8,
 
#ifndef SWIG
    _aiPrimitiveType_Force32Bit = INT_MAX
#endif
}; 
 
// Get the #aiPrimitiveType flag for a specific number of face indices
#define AI_PRIMITIVE_TYPE_FOR_N_INDICES(n) \
    ((n) > 3 ? aiPrimitiveType_POLYGON : (aiPrimitiveType)(1u << ((n)-1)))
 
// ---------------------------------------------------------------------------
struct aiAnimMesh {
    C_STRUCT aiString mName;
 
    C_STRUCT aiVector3D *mVertices;
 
    C_STRUCT aiVector3D *mNormals;
 
    C_STRUCT aiVector3D *mTangents;
 
    C_STRUCT aiVector3D *mBitangents;
 
    C_STRUCT aiColor4D *mColors[AI_MAX_NUMBER_OF_COLOR_SETS];
 
    C_STRUCT aiVector3D *mTextureCoords[AI_MAX_NUMBER_OF_TEXTURECOORDS];
 
    unsigned int mNumVertices;
 
    float mWeight;
 
#ifdef __cplusplus
 
    aiAnimMesh() AI_NO_EXCEPT
            : mVertices(nullptr),
              mNormals(nullptr),
              mTangents(nullptr),
              mBitangents(nullptr),
              mColors(),
              mTextureCoords(),
              mNumVertices(0),
              mWeight(0.0f) {
        // fixme consider moving this to the ctor initializer list as well
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; a++) {
            mTextureCoords[a] = nullptr;
        }
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_COLOR_SETS; a++) {
            mColors[a] = nullptr;
        }
    }
 
    ~aiAnimMesh() {
        delete[] mVertices;
        delete[] mNormals;
        delete[] mTangents;
        delete[] mBitangents;
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; a++) {
            delete[] mTextureCoords[a];
        }
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_COLOR_SETS; a++) {
            delete[] mColors[a];
        }
    }
 
    bool HasPositions() const {
        return mVertices != nullptr;
    }
 
    bool HasNormals() const {
        return mNormals != nullptr;
    }
 
    bool HasTangentsAndBitangents() const {
        return mTangents != nullptr;
    }
 
    bool HasVertexColors(unsigned int pIndex) const {
        return pIndex >= AI_MAX_NUMBER_OF_COLOR_SETS ? false : mColors[pIndex] != nullptr;
    }
 
    bool HasTextureCoords(unsigned int pIndex) const {
        return pIndex >= AI_MAX_NUMBER_OF_TEXTURECOORDS ? false : mTextureCoords[pIndex] != nullptr;
    }
 
#endif
};
 
// ---------------------------------------------------------------------------
enum aiMorphingMethod {
    aiMorphingMethod_VERTEX_BLEND = 0x1,
 
    aiMorphingMethod_MORPH_NORMALIZED = 0x2,
 
    aiMorphingMethod_MORPH_RELATIVE = 0x3,
 
#ifndef SWIG
    _aiMorphingMethod_Force32Bit = INT_MAX
#endif
}; 
 
// ---------------------------------------------------------------------------
struct aiMesh {
    unsigned int mPrimitiveTypes;
 
    unsigned int mNumVertices;
 
    unsigned int mNumFaces;
 
    C_STRUCT aiVector3D *mVertices;
 
    C_STRUCT aiVector3D *mNormals;
 
    C_STRUCT aiVector3D *mTangents;
 
    C_STRUCT aiVector3D *mBitangents;
 
    C_STRUCT aiColor4D *mColors[AI_MAX_NUMBER_OF_COLOR_SETS];
 
    C_STRUCT aiVector3D *mTextureCoords[AI_MAX_NUMBER_OF_TEXTURECOORDS];
 
    unsigned int mNumUVComponents[AI_MAX_NUMBER_OF_TEXTURECOORDS];
 
    C_STRUCT aiFace *mFaces;
 
    unsigned int mNumBones;
 
    C_STRUCT aiBone **mBones;
 
    unsigned int mMaterialIndex;
 
    C_STRUCT aiString mName;
 
    unsigned int mNumAnimMeshes;
 
    C_STRUCT aiAnimMesh **mAnimMeshes;
 
    unsigned int mMethod;
 
    C_STRUCT aiAABB mAABB;
 
#ifdef __cplusplus
 
    aiMesh() AI_NO_EXCEPT
            : mPrimitiveTypes(0),
              mNumVertices(0),
              mNumFaces(0),
              mVertices(nullptr),
              mNormals(nullptr),
              mTangents(nullptr),
              mBitangents(nullptr),
              mColors(),
              mTextureCoords(),
              mNumUVComponents(),
              mFaces(nullptr),
              mNumBones(0),
              mBones(nullptr),
              mMaterialIndex(0),
              mNumAnimMeshes(0),
              mAnimMeshes(nullptr),
              mMethod(0),
              mAABB() {
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++a) {
            mNumUVComponents[a] = 0;
            mTextureCoords[a] = nullptr;
        }
 
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_COLOR_SETS; ++a) {
            mColors[a] = nullptr;
        }
    }
 
    ~aiMesh() {
        delete[] mVertices;
        delete[] mNormals;
        delete[] mTangents;
        delete[] mBitangents;
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_TEXTURECOORDS; a++) {
            delete[] mTextureCoords[a];
        }
        for (unsigned int a = 0; a < AI_MAX_NUMBER_OF_COLOR_SETS; a++) {
            delete[] mColors[a];
        }
 
        // DO NOT REMOVE THIS ADDITIONAL CHECK
        if (mNumBones && mBones) {
            for (unsigned int a = 0; a < mNumBones; a++) {
                if (mBones[a]) {
                    delete mBones[a];
                }
            }
            delete[] mBones;
        }
 
        if (mNumAnimMeshes && mAnimMeshes) {
            for (unsigned int a = 0; a < mNumAnimMeshes; a++) {
                delete mAnimMeshes[a];
            }
            delete[] mAnimMeshes;
        }
 
        delete[] mFaces;
    }
 
    bool HasPositions() const { return mVertices != nullptr && mNumVertices > 0; }
 
    bool HasFaces() const { return mFaces != nullptr && mNumFaces > 0; }
 
    bool HasNormals() const { return mNormals != nullptr && mNumVertices > 0; }
 
    bool HasTangentsAndBitangents() const { return mTangents != nullptr && mBitangents != nullptr && mNumVertices > 0; }
 
    bool HasVertexColors(unsigned int pIndex) const {
        if (pIndex >= AI_MAX_NUMBER_OF_COLOR_SETS) {
            return false;
        } else {
            return mColors[pIndex] != nullptr && mNumVertices > 0;
        }
    }
 
    bool HasTextureCoords(unsigned int pIndex) const {
        if (pIndex >= AI_MAX_NUMBER_OF_TEXTURECOORDS) {
            return false;
        } else {
            return mTextureCoords[pIndex] != nullptr && mNumVertices > 0;
        }
    }
 
    unsigned int GetNumUVChannels() const {
        unsigned int n(0);
        while (n < AI_MAX_NUMBER_OF_TEXTURECOORDS && mTextureCoords[n]) {
            ++n;
        }
 
        return n;
    }
 
    unsigned int GetNumColorChannels() const {
        unsigned int n(0);
        while (n < AI_MAX_NUMBER_OF_COLOR_SETS && mColors[n]) {
            ++n;
        }
        return n;
    }
 
    bool HasBones() const {
        return mBones != nullptr && mNumBones > 0;
    }
 
#endif // __cplusplus
};
 
#ifdef __cplusplus
}
#endif 
#endif // AI_MESH_H_INC