unset($PlayContext);
$PlayContext = new NWC2PlayContext();
$HiddenStaff = false;
gzwrite($zout, $l);
continue;
}
if (preg_match('/^\\|StaffProperties\\|/', $l) && preg_match('/\\|Visible:\\s*([Y,N])/', $l, $m)) {
$HiddenStaff = $m[1] == "N";
}
if ($HiddenStaff) {
gzwrite($zout, $l);
continue;
}
$o = new NWC2ClipItemWithPitchPos($l, !$FileMode);
if (!$FileMode && $o->IsContextInfo()) {
$PlayContext->UpdateContext($o);
continue;
}
if (in_array($o->GetObjType(), $ObjectsWithNotes)) {
$stemDir = CalcMainStemDir($o);
$ischanged = false;
foreach ($AllNotePosTags as $pos_tag) {
if (empty($o->PitchPos[$pos_tag])) {
continue;
}
$PitchPos =& $o->PitchPos[$pos_tag];
$tagStemDir = $pos_tag == "Pos" ? $stemDir : ($stemDir + 1) % 2;
$weakSideStemPositions = array();
$numNotes = count($PitchPos);
$priornpp = false;
if ($tagStemDir == STEM_LEFT) {