assimp/code/AssetLib/ASE/ASEParser.h

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

Copyright (c) 2006-2022, assimp team


All rights reserved.

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with or without modification, are permitted provided that the
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* Redistributions of source code must retain the above
  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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  derived from this software without specific prior
  written permission of the assimp team.

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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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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 ASE files  */
#ifndef AI_ASEFILEHELPER_H_INC
#define AI_ASEFILEHELPER_H_INC

// public ASSIMP headers
#include <assimp/anim.h>
#include <assimp/mesh.h>
#include <assimp/types.h>

#ifndef ASSIMP_BUILD_NO_3DS_IMPORTER

// for some helper routines like IsSpace()
#include <assimp/ParsingUtils.h>
#include <assimp/qnan.h>

// ASE is quite similar to 3ds. We can reuse some structures
#include "AssetLib/3DS/3DSLoader.h"

namespace Assimp {
namespace ASE {

using namespace D3DS;

// ---------------------------------------------------------------------------
/** Helper structure representing an ASE material */
struct Material : public D3DS::Material {
    //! Default constructor has been deleted
    Material() = delete;

    //! Constructor with explicit name
    explicit Material(const std::string &name) :
            D3DS::Material(name),
            pcInstance(nullptr),
            bNeed(false) {
        // empty
    }

    Material(const Material &other) = default;

    Material &operator=(const Material &other) {
        if (this == &other) {
            return *this;
        }

        avSubMaterials = other.avSubMaterials;
        pcInstance = other.pcInstance;
        bNeed = other.bNeed;

        return *this;
    }

    //! Move constructor. This is explicitly written because MSVC doesn't support defaulting it
    Material(Material &&other) AI_NO_EXCEPT
            : D3DS::Material(std::move(other)),
              avSubMaterials(std::move(other.avSubMaterials)),
              pcInstance(other.pcInstance),
              bNeed(other.bNeed) {
        other.pcInstance = nullptr;
    }

    Material &operator=(Material &&other) AI_NO_EXCEPT {
        if (this == &other) {
            return *this;
        }

        //D3DS::Material::operator=(std::move(other));

        avSubMaterials = std::move(other.avSubMaterials);
        pcInstance = other.pcInstance;
        bNeed = other.bNeed;

        other.pcInstance = nullptr;

        return *this;
    }

    ~Material() = default;

    //! Contains all sub materials of this material
    std::vector<Material> avSubMaterials;

    //! aiMaterial object
    aiMaterial *pcInstance;

    //! Can we remove this material?
    bool bNeed;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent an ASE file face */
struct Face : public FaceWithSmoothingGroup {
    //! Default constructor. Initializes everything with 0
    Face() AI_NO_EXCEPT
            : iMaterial(DEFAULT_MATINDEX),
              iFace(0) {
        // empty
    }

    //! special value to indicate that no material index has
    //! been assigned to a face. The default material index
    //! will replace this value later.
    static const unsigned int DEFAULT_MATINDEX = 0xFFFFFFFF;

    //! Indices into each list of texture coordinates
    unsigned int amUVIndices[AI_MAX_NUMBER_OF_TEXTURECOORDS][3];

    //! Index into the list of vertex colors
    unsigned int mColorIndices[3];

    //! (Sub)Material index to be assigned to this face
    unsigned int iMaterial;

    //! Index of the face. It is not specified whether it is
    //! a requirement of the file format that all faces are
    //! written in sequential order, so we have to expect this case
    unsigned int iFace;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent an ASE file bone */
struct Bone {
    //! Constructor
    Bone() = delete;

    //! Construction from an existing name
    explicit Bone(const std::string &name) :
            mName(name) {
        // empty
    }

    //! Name of the bone
    std::string mName;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent an ASE file bone vertex */
struct BoneVertex {
    //! Bone and corresponding vertex weight.
    //! -1 for unrequired bones ....
    std::vector<std::pair<int, float>> mBoneWeights;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent an ASE file animation */
struct Animation {
    enum Type {
        TRACK = 0x0,
        BEZIER = 0x1,
        TCB = 0x2
    } mRotationType,
            mScalingType, mPositionType;

    Animation() AI_NO_EXCEPT
            : mRotationType(TRACK),
              mScalingType(TRACK),
              mPositionType(TRACK) {
        // empty
    }

    //! List of track rotation keyframes
    std::vector<aiQuatKey> akeyRotations;

    //! List of track position keyframes
    std::vector<aiVectorKey> akeyPositions;

    //! List of track scaling keyframes
    std::vector<aiVectorKey> akeyScaling;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent the inheritance information of an ASE node */
struct InheritanceInfo {
    //! Default constructor
    InheritanceInfo() AI_NO_EXCEPT {
        for (size_t i = 0; i < 3; ++i) {
            abInheritPosition[i] = abInheritRotation[i] = abInheritScaling[i] = true;
        }
    }

    //! Inherit the parent's position?, axis order is x,y,z
    bool abInheritPosition[3];

    //! Inherit the parent's rotation?, axis order is x,y,z
    bool abInheritRotation[3];

    //! Inherit the parent's scaling?, axis order is x,y,z
    bool abInheritScaling[3];
};

// ---------------------------------------------------------------------------
/** Represents an ASE file node. Base class for mesh, light and cameras */
struct BaseNode {
    enum Type {
        Light,
        Camera,
        Mesh,
        Dummy
    } mType;

    //! Construction from an existing name
    BaseNode(Type _mType, const std::string &name) :
            mType(_mType), mName(name), mProcessed(false) {
        // Set mTargetPosition to qnan
        const ai_real qnan = get_qnan();
        mTargetPosition.x = qnan;
    }

    //! Name of the mesh
    std::string mName;

    //! Name of the parent of the node
    //! "" if there is no parent ...
    std::string mParent;

    //! Transformation matrix of the node
    aiMatrix4x4 mTransform;

    //! Target position (target lights and cameras)
    aiVector3D mTargetPosition;

    //! Specifies which axes transformations a node inherits
    //! from its parent ...
    InheritanceInfo inherit;

    //! Animation channels for the node
    Animation mAnim;

    //! Needed for lights and cameras: target animation channel
    //! Should contain position keys only.
    Animation mTargetAnim;

    bool mProcessed;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent an ASE file mesh */
struct Mesh : public MeshWithSmoothingGroups<ASE::Face>, public BaseNode {
    //! Default constructor has been deleted
    Mesh() = delete;

    //! Construction from an existing name
    explicit Mesh(const std::string &name) :
            BaseNode(BaseNode::Mesh, name), mVertexColors(), mBoneVertices(), mBones(), iMaterialIndex(Face::DEFAULT_MATINDEX), bSkip(false) {
        for (unsigned int c = 0; c < AI_MAX_NUMBER_OF_TEXTURECOORDS; ++c) {
            this->mNumUVComponents[c] = 2;
        }
    }

    //! List of all texture coordinate sets
    std::vector<aiVector3D> amTexCoords[AI_MAX_NUMBER_OF_TEXTURECOORDS];

    //! List of all vertex color sets.
    std::vector<aiColor4D> mVertexColors;

    //! List of all bone vertices
    std::vector<BoneVertex> mBoneVertices;

    //! List of all bones
    std::vector<Bone> mBones;

    //! Material index of the mesh
    unsigned int iMaterialIndex;

    //! Number of vertex components for each UVW set
    unsigned int mNumUVComponents[AI_MAX_NUMBER_OF_TEXTURECOORDS];

    //! used internally
    bool bSkip;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent an ASE light source */
struct Light : public BaseNode {
    enum LightType {
        OMNI,
        TARGET,
        FREE,
        DIRECTIONAL
    };

    //! Default constructor has been deleted
    Light() = delete;

    //! Construction from an existing name
    explicit Light(const std::string &name) :
            BaseNode(BaseNode::Light, name), mLightType(OMNI), mColor(1.f, 1.f, 1.f), mIntensity(1.f) // light is white by default
            ,
            mAngle(45.f),
            mFalloff(0.f) {
    }

    LightType mLightType;
    aiColor3D mColor;
    ai_real mIntensity;
    ai_real mAngle; // in degrees
    ai_real mFalloff;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent an ASE camera */
struct Camera : public BaseNode {
    enum CameraType {
        FREE,
        TARGET
    };

    //! Default constructor has been deleted
    Camera() = delete;

    //! Construction from an existing name
    explicit Camera(const std::string &name) :
            BaseNode(BaseNode::Camera, name), mFOV(0.75f) // in radians
            ,
            mNear(0.1f),
            mFar(1000.f) // could be zero
            ,
            mCameraType(FREE) {
    }

    ai_real mFOV, mNear, mFar;
    CameraType mCameraType;
};

// ---------------------------------------------------------------------------
/** Helper structure to represent an ASE helper object (dummy) */
struct Dummy : public BaseNode {
    //! Constructor
    Dummy() AI_NO_EXCEPT
            : BaseNode(BaseNode::Dummy, "DUMMY") {
        // empty
    }
};

// Parameters to Parser::Parse()
#define AI_ASE_NEW_FILE_FORMAT 200
#define AI_ASE_OLD_FILE_FORMAT 110

// Internally we're a little bit more tolerant
#define AI_ASE_IS_NEW_FILE_FORMAT() (iFileFormat >= 200)
#define AI_ASE_IS_OLD_FILE_FORMAT() (iFileFormat < 200)

// -------------------------------------------------------------------------------
/** \brief Class to parse ASE files
 */
class Parser {
private:
    Parser() AI_NO_EXCEPT {
        // empty
    }

public:
    // -------------------------------------------------------------------
    //! Construct a parser from a given input file which is
    //! guaranteed to be terminated with zero.
    //! @param szFile Input file
    //! @param fileFormatDefault Assumed file format version. If the
    //!   file format is specified in the file the new value replaces
    //!   the default value.
    Parser(const char *szFile, unsigned int fileFormatDefault);

    // -------------------------------------------------------------------
    //! Parses the file into the parsers internal representation
    void Parse();

private:
    // -------------------------------------------------------------------
    //! Parse the *SCENE block in a file
    void ParseLV1SceneBlock();

    // -------------------------------------------------------------------
    //! Parse the *MESH_SOFTSKINVERTS block in a file
    void ParseLV1SoftSkinBlock();

    // -------------------------------------------------------------------
    //! Parse the *MATERIAL_LIST block in a file
    void ParseLV1MaterialListBlock();

    // -------------------------------------------------------------------
    //! Parse a *<xxx>OBJECT block in a file
    //! \param mesh Node to be filled
    void ParseLV1ObjectBlock(BaseNode &mesh);

    // -------------------------------------------------------------------
    //! Parse a *MATERIAL blocks in a material list
    //! \param mat Material structure to be filled
    void ParseLV2MaterialBlock(Material &mat);

    // -------------------------------------------------------------------
    //! Parse a *NODE_TM block in a file
    //! \param mesh Node (!) object to be filled
    void ParseLV2NodeTransformBlock(BaseNode &mesh);

    // -------------------------------------------------------------------
    //! Parse a *TM_ANIMATION block in a file
    //! \param mesh Mesh object to be filled
    void ParseLV2AnimationBlock(BaseNode &mesh);
    void ParseLV3PosAnimationBlock(ASE::Animation &anim);
    void ParseLV3ScaleAnimationBlock(ASE::Animation &anim);
    void ParseLV3RotAnimationBlock(ASE::Animation &anim);

    // -------------------------------------------------------------------
    //! Parse a *MESH block in a file
    //! \param mesh Mesh object to be filled
    void ParseLV2MeshBlock(Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse a *LIGHT_SETTINGS block in a file
    //! \param light Light object to be filled
    void ParseLV2LightSettingsBlock(Light &light);

    // -------------------------------------------------------------------
    //! Parse a *CAMERA_SETTINGS block in a file
    //! \param cam Camera object to be filled
    void ParseLV2CameraSettingsBlock(Camera &cam);

    // -------------------------------------------------------------------
    //! Parse the *MAP_XXXXXX blocks in a material
    //! \param map Texture structure to be filled
    void ParseLV3MapBlock(Texture &map);

    // -------------------------------------------------------------------
    //! Parse a *MESH_VERTEX_LIST block in a file
    //! \param iNumVertices Value of *MESH_NUMVERTEX, if present.
    //! Otherwise zero. This is used to check the consistency of the file.
    //! A warning is sent to the logger if the validations fails.
    //! \param mesh Mesh object to be filled
    void ParseLV3MeshVertexListBlock(
            unsigned int iNumVertices, Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse a *MESH_FACE_LIST block in a file
    //! \param iNumFaces Value of *MESH_NUMFACES, if present.
    //! Otherwise zero. This is used to check the consistency of the file.
    //! A warning is sent to the logger if the validations fails.
    //! \param mesh Mesh object to be filled
    void ParseLV3MeshFaceListBlock(
            unsigned int iNumFaces, Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse a *MESH_TVERT_LIST block in a file
    //! \param iNumVertices Value of *MESH_NUMTVERTEX, if present.
    //! Otherwise zero. This is used to check the consistency of the file.
    //! A warning is sent to the logger if the validations fails.
    //! \param mesh Mesh object to be filled
    //! \param iChannel Output UVW channel
    void ParseLV3MeshTListBlock(
            unsigned int iNumVertices, Mesh &mesh, unsigned int iChannel = 0);

    // -------------------------------------------------------------------
    //! Parse a *MESH_TFACELIST block in a file
    //! \param iNumFaces Value of *MESH_NUMTVFACES, if present.
    //! Otherwise zero. This is used to check the consistency of the file.
    //! A warning is sent to the logger if the validations fails.
    //! \param mesh Mesh object to be filled
    //! \param iChannel Output UVW channel
    void ParseLV3MeshTFaceListBlock(
            unsigned int iNumFaces, Mesh &mesh, unsigned int iChannel = 0);

    // -------------------------------------------------------------------
    //! Parse an additional mapping channel
    //! (specified via *MESH_MAPPINGCHANNEL)
    //! \param iChannel Channel index to be filled
    //! \param mesh Mesh object to be filled
    void ParseLV3MappingChannel(
            unsigned int iChannel, Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse a *MESH_CVERTLIST block in a file
    //! \param iNumVertices Value of *MESH_NUMCVERTEX, if present.
    //! Otherwise zero. This is used to check the consistency of the file.
    //! A warning is sent to the logger if the validations fails.
    //! \param mesh Mesh object to be filled
    void ParseLV3MeshCListBlock(
            unsigned int iNumVertices, Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse a *MESH_CFACELIST block in a file
    //! \param iNumFaces Value of *MESH_NUMCVFACES, if present.
    //! Otherwise zero. This is used to check the consistency of the file.
    //! A warning is sent to the logger if the validations fails.
    //! \param mesh Mesh object to be filled
    void ParseLV3MeshCFaceListBlock(
            unsigned int iNumFaces, Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse a *MESH_NORMALS block in a file
    //! \param mesh Mesh object to be filled
    void ParseLV3MeshNormalListBlock(Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse a *MESH_WEIGHTSblock in a file
    //! \param mesh Mesh object to be filled
    void ParseLV3MeshWeightsBlock(Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse the bone list of a file
    //! \param mesh Mesh object to be filled
    //! \param iNumBones Number of bones in the mesh
    void ParseLV4MeshBones(unsigned int iNumBones, Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse the bone vertices list of a file
    //! \param mesh Mesh object to be filled
    //! \param iNumVertices Number of vertices to be parsed
    void ParseLV4MeshBonesVertices(unsigned int iNumVertices, Mesh &mesh);

    // -------------------------------------------------------------------
    //! Parse a *MESH_FACE block in a file
    //! \param out receive the face data
    void ParseLV4MeshFace(ASE::Face &out);

    // -------------------------------------------------------------------
    //! Parse a *MESH_VERT block in a file
    //! (also works for MESH_TVERT, MESH_CFACE, MESH_VERTCOL  ...)
    //! \param apOut Output buffer (3 floats)
    //! \param rIndexOut Output index
    void ParseLV4MeshFloatTriple(ai_real *apOut, unsigned int &rIndexOut);

    // -------------------------------------------------------------------
    //! Parse a *MESH_VERT block in a file
    //! (also works for MESH_TVERT, MESH_CFACE, MESH_VERTCOL  ...)
    //! \param apOut Output buffer (3 floats)
    void ParseLV4MeshFloatTriple(ai_real *apOut);

    // -------------------------------------------------------------------
    //! Parse a *MESH_TFACE block in a file
    //! (also works for MESH_CFACE)
    //! \param apOut Output buffer (3 ints)
    //! \param rIndexOut Output index
    void ParseLV4MeshLongTriple(unsigned int *apOut, unsigned int &rIndexOut);

    // -------------------------------------------------------------------
    //! Parse a *MESH_TFACE block in a file
    //! (also works for MESH_CFACE)
    //! \param apOut Output buffer (3 ints)
    void ParseLV4MeshLongTriple(unsigned int *apOut);

    // -------------------------------------------------------------------
    //! Parse a single float element
    //! \param fOut Output float
    void ParseLV4MeshFloat(ai_real &fOut);

    // -------------------------------------------------------------------
    //! Parse a single int element
    //! \param iOut Output integer
    void ParseLV4MeshLong(unsigned int &iOut);

    // -------------------------------------------------------------------
    //! Skip everything to the next: '*' or '\0'
    bool SkipToNextToken();

    // -------------------------------------------------------------------
    //! Skip the current section until the token after the closing }.
    //! This function handles embedded subsections correctly
    bool SkipSection();

    // -------------------------------------------------------------------
    //! Output a warning to the logger
    //! \param szWarn Warn message
    void LogWarning(const char *szWarn);

    // -------------------------------------------------------------------
    //! Output a message to the logger
    //! \param szWarn Message
    void LogInfo(const char *szWarn);

    // -------------------------------------------------------------------
    //! Output an error to the logger
    //! \param szWarn Error message
    AI_WONT_RETURN void LogError(const char *szWarn) AI_WONT_RETURN_SUFFIX;

    // -------------------------------------------------------------------
    //! Parse a string, enclosed in double quotation marks
    //! \param out Output string
    //! \param szName Name of the enclosing element -> used in error
    //! messages.
    //! \return false if an error occurred
    bool ParseString(std::string &out, const char *szName);

public:
    //! Pointer to current data
    const char *filePtr;

    //! background color to be passed to the viewer
    //! QNAN if none was found
    aiColor3D m_clrBackground;

    //! Base ambient color to be passed to all materials
    //! QNAN if none was found
    aiColor3D m_clrAmbient;

    //! List of all materials found in the file
    std::vector<Material> m_vMaterials;

    //! List of all meshes found in the file
    std::vector<Mesh> m_vMeshes;

    //! List of all dummies found in the file
    std::vector<Dummy> m_vDummies;

    //! List of all lights found in the file
    std::vector<Light> m_vLights;

    //! List of all cameras found in the file
    std::vector<Camera> m_vCameras;

    //! Current line in the file
    unsigned int iLineNumber;

    //! First frame
    unsigned int iFirstFrame;

    //! Last frame
    unsigned int iLastFrame;

    //! Frame speed - frames per second
    unsigned int iFrameSpeed;

    //! Ticks per frame
    unsigned int iTicksPerFrame;

    //! true if the last character read was an end-line character
    bool bLastWasEndLine;

    //! File format version
    unsigned int iFileFormat;
};

} // Namespace ASE
} // namespace Assimp

#endif // ASSIMP_BUILD_NO_3DS_IMPORTER

#endif // !! include guard