Add comments to Quads.hx (#523)

h3d/prim/Quads.hx

@@ -7,6 +7,9 @@ class Quads extends Primitive {
 	var uvs : Array<UV>;
 	var normals : Array<Point>;
 
+	/**
+	* You have to pass vertices in this order: top left, top right, bottom left, bottom right
+	*/
 	public function new( pts, ?uvs, ?normals ) {
 		this.pts = pts;
 		this.uvs = uvs;