void IGActiveFreeAttrByID(IPObjectStruct *PObj, IPAttrIDType AttrID)

    void IGActiveFreePolyIsoAttribute(IPObjectStruct *PObj,
                                      int FreePolygons,
                                      int FreeIsolines,
                                      int FreeSketches,
                                      int FreeCtlMesh)

    void IGActiveListFreeAttrByID(IPObjectStruct *PObjs, IPAttrIDType AttrID)

    void IGActiveListFreePolyIsoAttribute(IPObjectStruct *PObjs,
                                          int FreePolygons,
                                          int FreeIsolines,
                                          int FreeSketches,
                                          int FreeCtlMesh)

    void IGClearObjTextureMovieAttr(const IPObjectStruct *PObj)

    unsigned char *IGCnvrtChar2Raster(const char c)

    void IGConfirmConvexPolys(IPObjectStruct *PObj, int Depth)

    IGDrawObjectFuncType IGDSetDrawPolyFunc(IGDrawObjectFuncType DrawPolyFunc)

    IPObjectStruct *IGDecomposeMdlDue2Graphics(const IPObjectStruct *PMdls)

    IPObjectStruct *IGDecomposeVMdlDue2Graphics(const IPObjectStruct *PVMdls)

    int IGDefaultProcessEvent(IGGraphicEventType Event, IrtRType *ChangeFactor)

    int IGDefaultStateHandler(int State, int StateStatus, int Refresh)

    int IGDeleteTexture(const IPObjectStruct *PObj)

    void IGDrawCurve(IPObjectStruct *PObj)

    void IGDrawCurveGenPolylines(const IPObjectStruct *PObj)

    void IGDrawModel(IPObjectStruct *PObj, IGDrawObjectFuncType DrawTSrfsFuncPtr)

    void IGDrawModelGenPolygons(const IPObjectStruct *PObj)

    void IGDrawPolyBoundary(IPObjectStruct *PObj)

    void IGDrawPolyContours(IPObjectStruct *PObj)

    int IGDrawPolyContoursSetup(IrtRType x, IrtRType y, IrtRType z, int n)

    void IGDrawPolyDiscontinuities(IPObjectStruct *PObj)

    void IGDrawPolyIsophotes(IPObjectStruct *PObj)

    int IGDrawPolyIsophotesSetup(IrtRType x, IrtRType y, IrtRType z, int n)

    void IGDrawPolyKnotLines(IPObjectStruct *PObj)

    void IGDrawPolySilhBndry(IPObjectStruct *PObj)

    void IGDrawPolySilhouette(IPObjectStruct *PObj)

    void IGDrawPolygonSketches(IPObjectStruct *PObj)

    void IGDrawString(IPObjectStruct *PObj)

    void IGDrawSurface(IPObjectStruct *PObj)

    void IGDrawSurfaceGenPolygons(const IPObjectStruct *PObj)

    void IGDrawTriangGenSrfPolygons(const IPObjectStruct *PObj)

    void IGDrawTriangSrf(IPObjectStruct *PObj)

    void IGDrawTrimSrf(IPObjectStruct *PObj)

    void IGDrawTrimSrfGenPolygons(const IPObjectStruct *PObj)

    void IGDrawTrivar(IPObjectStruct *PObj)

    void IGDrawTrivarGenSrfPolygons(const IPObjectStruct *PObj)

    void IGDrawVModel(IPObjectStruct *PObj, IGDrawObjectFuncType DrawTSrfsFuncPtr)

    void IGDrawVModelGenPolygons(const IPObjectStruct *PObj)

    IrtRType IGFindMinimalDist(IPObjectStruct *PObj,
                               IPPolygonStruct **MinPl,
                               IrtPtType MinPt,
                               int *MinPlIsPolyline,
                               const IrtPtType LinePos,
                               const IrtVecType LineDir,
                               IrtRType *HitDepth)

    IPObjectStruct *IGGenPolygonSketches(IPObjectStruct *PObj, IrtRType FineNess)

    IPObjectStruct *IGGetObjIsoLines(const IPObjectStruct *PObj)

    IPObjectStruct *IGGetObjPolygons(const IPObjectStruct *PObj)

    void IGGraphicsStateGet(IGGraphicStateStruct *IGS)

    void IGGraphicsStateReset(IGGraphicStateStruct *IGS)

    void IGGraphicsStateResetDefault(void)

    void IGGraphicsStateSet(const IGGraphicStateStruct *IGS)

    int IGInitSrfMovie(const IPObjectStruct *PObj)

    int IGInitSrfTexture(const IPObjectStruct *PObj)

    int IGInitSrfTextureFromImage(const IPObjectStruct *PObj,
                                  int SrfIdx,
                                  void *Image,
                                  int ImageWidth,
                                  int ImageHeight,
                                  int ImageAlpha)

    IPObjectStruct *IGLoadGeometry(const char **FileNames, int NumFiles)

    void IGSaveCurrentMat(int ViewMode, char *Name)

    IGDrawUpdateFuncType IGSetCtlMeshPostFunc(IGDrawUpdateFuncType Func)

    IGDrawUpdateFuncType IGSetCtlMeshPreFunc(IGDrawUpdateFuncType Func)

    IGDrawUpdateFuncType IGSetSketchPostFunc(IGDrawUpdateFuncType Func)

    IGDrawUpdateFuncType IGSetSketchPreFunc(IGDrawUpdateFuncType Func)

    IGDrawUpdateFuncType IGSetSrfPolysPostFunc(IGDrawUpdateFuncType Func)

    IGDrawUpdateFuncType IGSetSrfPolysPreFunc(IGDrawUpdateFuncType Func)

    IGDrawUpdateFuncType IGSetSrfWirePostFunc(IGDrawUpdateFuncType Func)

    IGDrawUpdateFuncType IGSetSrfWirePreFunc(IGDrawUpdateFuncType Func)

    void IGSketchDrawPolygons(IPObjectStruct *PObjSketches)

    void IGSketchDrawSurface(const IPObjectStruct *PObjSketches)

    IPObjectStruct *IGSketchGenPolyImportanceSketches(IPObjectStruct *PObj,
                                                IGSketchParamStruct *SketchParams,
                                                IrtRType FineNess)

    IPObjectStruct *IGSketchGenPolySketches(IPObjectStruct *PlObj,
                                            IrtRType FineNess,
                                            int Importance)

    IPObjectStruct *IGSketchGenSrfSketches(const CagdSrfStruct *InSrf,
                                           IrtRType FineNess,
                                           const IPObjectStruct *PObj,
                                           int Importance)

    void IGUpdateFPS(int Start)

    void IGUpdateObjectBBox(IPObjectStruct *PObj)

    void IGUpdateViewConsideringScale(IrtHmgnMatType Mat)