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    gCAD3D

    Codes
    File-formate
    Binary-formate

    File-formate gcad

    File structure
    Format mainmodel / submodels
    Format Attributes
    Examples

    All objects in memory are kept in analytical form with all definition parameters
      (Ascii text, analytical form)

    The file format .gcad is the same as the internal format.

    The objects can also be exported as mock-up elements,
      tesselated for faster loading in assemblies, but without parametrics.

    Other analytical export formats: .gcad, .iges

    Mock-up export formats: Vrml-1, Vrml-2, obj, tess

    If you save a model file as {base}/tmp/Model,
      it will be loaded wenn the program starts.
      {base} normally is ~/gCAD3D/.

    File structure gcad

    Structure of Model files:

    The model files contain all subModels, NC-processes and applicationData
      (data of plugins).

    The format of the model files is ascii - text.

    SubModels, Processes and applicationData are embedded into sections,
      followed by the mainModel.

    All sections before the mainModel start with:
    SECTION {sectionTyp} {parameter}
    and end with:
    SECTIONEND

      - subModels          SECTION MODEL {modelname}
      - point Tables       SECTION PTAB  {modelname} {ObjID}
      - Meshes             SECTION MESH  {modelname} {ObjID}
      - Processes (eg NC)  SECTION PROCESS {processName}
      - applicationData    SECTION APPDAT {pluginName}
      - mainModel          ..

    SECTION MODEL {modelname}
    - Dynamic-Dataspace (settings, standards, End: ":DYNAMIC_DATA")
    - Objectdata
    SECTIONEND

    SECTION PTAB {modelname}_{ObjID}
    ptnr={nr of points}
    {pointCoords, one point per line}
    SECTIONEND

    SECTION MESH  {modelname}_{ObjID}
    faces={nr of faces} edgelines={nr of edgelines}
    {faces (3 indices for one face per line)}
    edgeline={nr of edgeline} points={nr of points} edgetyp={edgetyp}
    {edgeline (indices for points)}
    SECTIONEND

    SECTION PROCESS {processName}
    - Objectdata
    - process-specific-commands
    SECTIONEND

    SECTION APPDAT {pluginName}
    - beliebige Daten;
      werden nur von der Applikation {pluginName} geschrieben, gelesen.
    SECTIONEND

    Das mainModel contains the objectcodes, see Examples.

    Format mainmodel / submodels:

    - Section DYNAMIC_DATA (optional)
    - Objectdata

    Section DYNAMIC_DATA:

    can have these records:

    - MODSIZ                 Modelsize
    - DEFTX                  Textsize
    - VIEW                   active view
    - CONST_PL               active construction plane
    - GATAB                  table graf. attributes
    - :DYNAMIC_DATA          end of section DYNAMIC_DATA

    Objectdata:
      see Codes,
      see Beispiele.

    Format Attributes:

    The grafic attributes define linientypes, colours, transparency, textures.

    GATAB      starts the grafic-attributes-table, .
    ENDGATAB   end of table.

    Grafic-Attributes-Records for Lines, Curves:

     [T#]
     H  hide
     T  index Linetyp; 2=dash, 3=dashDot; see file cfg/ltyp.rc

    Grafic-Attributes-Records for surfaces:

     [C [H] [T#] [S#] [X"filename"<,parameters>]
     H  hidden
     C  R-G-B-Colors as 3 x 2 hex-chars; eg. green is C00ff00
     T  transparent; 0=not, 1=50% transparent, 2=full transparent
     S  symbolic; 0=not, 1=symbolic display
     X  textured surface; Format:
        X"",X-scale,Y-Scale,X-Offset,Y-Offset,RotAng[,X-vec,Z-Vec]
            consists of "/"
          Offsets are Values from 0-1
          RotAng in degree

    Example line with linetype 2 (dashed):
    GATAB
    L20 T2
    ENDGATAB
    :DYNAMIC_DATA
    L20=P(0 0 0) P(100 10 0)
    #eof

    Example area with colour:
    # example GATAB: surface A20 has color e2dc27; surf. A21 is symbolic (not shaded)
    GATAB
    A20 Ce2dc27
    A21 S1
    ENDGATAB
    :DYNAMIC_DATA
    C20=P(50 100) 25
    C21=P(100 100) 25
    A20=C20
    A21=C21
    #eof

    Examples:

    Example mainmodel only:
    # 2010/11/29-18:37:05
    P1=P(0 0)
    P2=P(200 20)
    # Line from 2 points
    L1=P1 P2
    # circle from Center, Radius
    C1=P(50 100) 25
    # area from circle
    A1=C1
    # Ende

    Example model file with subModel:
    # 2010/11/29-18:37:05
    SECTION MODEL SM1
    # Cone from 1 Points 2 radius
    B1=CON P(0 0) P(0 0 12) VAL(16) VAL(12)
    SECTIONEND
    # 2 references of submodel
    M1="SM1" P(0 0)
    M1="SM1" P(50 0)
    # End

    Example model with mesh:
    SECTION PTAB _A1
    ptnr=4
    78.206807 -215.069439 0
    75.797808 -206.220382 0
    82.125568 -204.36855 0
    83.557688 -210.647853 0
    SECTIONEND
    SECTION MESH _A2
    faces=2 edgelines=1
    3 2 1
    3 1 0
    edgeline=0 points=4 edgetyp=5
    3 2 1 0
    SECTIONEND
    A1=PTAB
    A2=MSH A1

    Send bug-reports, suggestions for improvement to
      franz.reiter@cadcam.co.at