public static extern double IGFindMinimalDist(IPObjectStruct *PObj,
IPPolygonStruct **MinPl,
IrtPtType *MinPt,
int *MinPlIsPolyline,
IrtPtType *LinePos,
IrtVecType *LineDir,
double *HitDepth);
public static extern CagdCrvStruct *IPCurvesToCubicBzrCrvs(CagdCrvStruct *Crvs,
IPPolygonStruct **CtlPolys,
int DrawCurve,
int DrawCtlPoly,
double MaxArcLen);