assimp/code/ASEParser.h

/*
Open Asset Import Library (assimp)
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All rights reserved.

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  following disclaimer.

* Redistributions in binary form must reproduce the above
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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/types.h>
#include <assimp/mesh.h>
#include <assimp/anim.h>

// for some helper routines like IsSpace()
#include "ParsingUtils.h"
#include "qnan.h"

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

namespace Assimp    {
namespace ASE   {

using namespace D3DS;

// ---------------------------------------------------------------------------
/** Helper structure representing an ASE material */
struct Material : public D3DS::Material
{
    //! Default constructor
    Material() : pcInstance(NULL), bNeed (false)
    {}

    //! 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()
    {
        mColorIndices[0] = mColorIndices[1] = mColorIndices[2] = 0;
        for (unsigned int i = 0; i < AI_MAX_NUMBER_OF_TEXTURECOORDS;++i)
        {
            amUVIndices[i][0] = amUVIndices[i][1] = amUVIndices[i][2] = 0;
        }

        iMaterial = DEFAULT_MATINDEX;
        iFace = 0;
    }

    //! 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()
    {
        static int iCnt = 0;

        // Generate a default name for the bone
        char szTemp[128];
        ::ai_snprintf(szTemp, 128, "UNNAMED_%i",iCnt++);
        mName = szTemp;
    }

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

    //! 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;

    //! Position of the bone vertex.
    //! MUST be identical to the vertex position
    //aiVector3D mPosition;
};

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

    Animation()
        :   mRotationType   (TRACK)
        ,   mScalingType    (TRACK)
        ,   mPositionType   (TRACK)
    {}

    //! 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()
    {
        // set the inheritance flag for all axes by default to true
        for (unsigned int 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;

    //! Constructor. Creates a default name for the node
    explicit BaseNode(Type _mType)
        : mType         (_mType)
        , mProcessed    (false)
    {
        // generate a default name for the  node
        static int iCnt = 0;
        char szTemp[128]; // should be sufficiently large
        ::ai_snprintf(szTemp, 128, "UNNAMED_%i",iCnt++);
        mName = szTemp;

        // Set mTargetPosition to qnan
        const float 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
{
    //! Constructor.
    Mesh()
        : BaseNode  (BaseNode::Mesh)
        , bSkip     (false)
    {
        // use 2 texture vertex components by default
        for (unsigned int c = 0; c < AI_MAX_NUMBER_OF_TEXTURECOORDS;++c)
            this->mNumUVComponents[c] = 2;

        // setup the default material index by default
        iMaterialIndex = Face::DEFAULT_MATINDEX;
    }

    //! 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
    };

    //! Constructor.
    Light()
        : BaseNode   (BaseNode::Light)
        , 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;
    float mIntensity;
    float mAngle; // in degrees
    float mFalloff;
};

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

    //! Constructor
    Camera()
        : BaseNode    (BaseNode::Camera)
        , mFOV        (0.75f)   // in radians
        , mNear       (0.1f)
        , mFar        (1000.f)  // could be zero
        , mCameraType (FREE)
    {
    }

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

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

// 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() {}

public:

    // -------------------------------------------------------------------
    //! Construct a parser from a given input file which is
    //! guaranted 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(float* 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(float* 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(float& 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 // !! include guard