// PointSymmetric 0.322
// 選択した頂点のｘを反転して２番目の頂点に適用(1&2,3&4...の対)。

@name "PointSymmetric"
@version 2.5
@warnings
@script modeler

main
{
	selmode(DIRECT);
	var SelPts = pointcount();
// 90/92/93 はpoint/poly countでUndoバッファを消費する
@if version < 2.2
	undo();
@end
@if version > 2.7
	undo();
@end

	if(SelPts < 2){
		error("<br> Need 2 pts or More.");
		return;
	}

	editbegin();
	var TrgVec;
	var c = SelPts >> 1;
	var p = 1;
	for(i = 1; i <= c; i++){
		TrgVec = pointinfo(points[p++]);
		TrgVec.x *= -1.0;
		pointmove(points[p++], TrgVec);
	}
	var LastPts = points[SelPts];
	editend();
	selmode(USER);
	selpoint(CLEAR);
	if(SelPts % 2){
		selpoint(SET, POINTID, LastPts);
// 90/92/93 はeditbegin/end の後のselpoint/polyでUndoバッファを消費する
@if version < 2.2
		undo();
@end
@if version > 2.7
		undo();
@end
		info("<br> No Modified Fraction Point");
	}
}