ZTable*         O_OBJECT
TriangleMesh*         O_OBJECT
Point*         O_OBJECT
Line*           O_OBJECT
Polyline*       O_OBJECT
Polygon*        O_OBJECT
ExPolygon*      O_OBJECT
ExPolygonCollection*    O_OBJECT
ExtrusionPath*  O_OBJECT
ExtrusionLoop*  O_OBJECT
Surface*        O_OBJECT
SurfaceCollection*      O_OBJECT

ExtrusionRole     T_UV
SurfaceType     T_UV
ClipperLib::JoinType		T_UV

Lines           T_ARRAYREF
Polygons        T_ARRAYREF
ExPolygons      T_ARRAYREF

INPUT

T_ARRAYREF
    if (SvROK($arg) && SvTYPE(SvRV($arg)) == SVt_PVAV) {
        AV* av = (AV*)SvRV($arg);
        const unsigned int len = av_len(av)+1;
        $type* tmp = new $type(len);
        for (unsigned int i = 0; i < len; i++) {
            SV** elem = av_fetch(av, i, 0);
            (*tmp)[i].from_SV_check(*elem);
        }
        $var = *tmp;
	    delete tmp;
    } else
        Perl_croak(aTHX_ \"%s: %s is not an array reference\",
	             ${$ALIAS?\q[GvNAME(CvGV(cv))]:\qq[\"$pname\"]},
	             \"$var\");

OUTPUT

T_ARRAYREF
	AV* av = newAV();
	$arg = newRV_noinc((SV*)av);
	const unsigned int len = $var.size();
	av_extend(av, len-1);
	for (unsigned int i = 0; i < len; i++) {
        av_store(av, i, ${var}[i].to_SV_ref());
	}