Hi Jim, we are using the Area to clip/intersect geometries like a polygon. Such a polygon has a digitizing direction and this direction has an effect on the point order.
If we visualize a clipped polygon in our map, than we have the problem that complex line styles like a placed graphic along a line e.g. an arrow, shows in the wrong direction. Thanks for the explanation Jim, I will consider the point-order manipulation in our application. Regards, Steve Diese E-Mail wurde versandt im Auftrag des Unternehmens Intergraph Ges.m.b.H. Vertretungsberechtigte Geschäftsführer: Maximilian Weber Sitz der Gesellschaft: Margaretenstraße 70/I/1, 1050 Wien, Österreich, Tel. +43 (1) 9610567-0 Eingetragen beim Handelsgericht Wien, Firmenbuch-Nr.: FN 116859 b Umsatzsteuer-Identifikationsnummer / VAT-ID: ATU15138401, Steuer-Nummer: 264/4807 This E-Mail has been sent on behalf of the company Intergraph Ges.m.b.H. Authorised Managing Directors: Maximilian Weber Registered office and Austrian headquarters: Margaretenstr. 70/I/1, 1050 Wien, Austria, Tel. +43 (1) 9610567-0 The company is recorded at the commercial court of Vienna under the company register number FN 116859 b VAT-ID: ATU15138401, Austrian Tax ID: 264/4807 Diese E-Mail (mit zugehörigen Dateien) enthält möglicherweise Informationen, die vertraulich sind, dem Urheberrecht unterliegen oder ein Geschäftsgeheimnis darstellen. Falls Sie diese Nachricht irrtümlicherweise erhalten haben, benachrichtigen Sie uns bitte umgehend, indem Sie eine Antwort senden, und löschen Sie bitte diese E-Mail und Ihre Antwort darauf. Sämtliche aufgeführten Ansichten oder Meinungen sind ausschließlich diejenigen des Autors und entsprechen nicht notwendigerweise denen des Unternehmens Intergraph. This E-Mail (and any attachments) may be confidential and protected by legal privilege. If you are not the intended recipient please notify us immediately by replying to the sender and delete this E-Mail and your reply from your system. All the views and opinions published here are solely based on the author's own opinion and should not be considered necessarily as reflecting the opinion of Intergraph. -----Original Message----- From: Jim Graham [mailto:james.gra...@oracle.com] Sent: Tuesday, October 6, 2015 8:38 PM To: Hruda, Steve <steve.hr...@hexagongeospatial.com> Cc: Sergey Bylokhov <sergey.bylok...@oracle.com>; 2d-dev <2d-dev@openjdk.java.net> Subject: Re: [OpenJDK 2D-Dev] <AWT Dev> Question: Area changes order of points Hi Steve, Area simplifies the shape into a normalized version that defines the same interior area. It does not care what the original ordering of the points was as it internalizes the shape, all it cares about is which areas are geometrically inside vs. outside and it creates a path according to its own internal policies that defines the same inside/outside boundaries. There is no "trick" to customizing this behavior and I'm not entirely sure why the point ordering would matter when you are performing CAG (Constructive Area Geometry) operations - only interiors and exteriors should matter. ...jim On 10/5/15 8:19 AM, Sergey Bylokhov wrote: > Hello, > I think this question is related to java2d, correct alias cc. > > On 24.09.15 12:53, Hruda, Steve wrote: >> I use the java.awt.geom.Area class to clip a shape. Today I noticed >> that new Area(Shape) changes the orientation of the shape, so that I >> get the points of the Area counter-clockwise in every case. >> >> The following test shows you my problem. >> >> https://drive.google.com/file/d/0B7P_rknS1TWxVGJ6a3hBaElBTk0/view?usp >> =sharing >> >> >> Is this a bug or do I something wrong? >> >> Is there a trick to get the points in the correct order? > >
