October 2011 - Inkscape Devel

Polygon in polygon test
by Pippijn van Steenhoven 17 Oct '11

17 Oct '11

Hello Inkscape developers, I'm working on an Inkscape function that sorts paths in an order suitable for 3D rendering. For this, I need to know which polygons contain which other polygons. In my use case, partial containment does not occur, i.e. every shape is either fully contained or has no crossings. I tried to implement this "polygon in polygon" functionality by iterating over all the points of one polygon and using the 2geom function Geom::contains(Path, Point) to test them for containment. However, I found several cases where the function does not yield the expected result[1]. The current method I use is to test for partial inclusion (at least one point is included) and the number of crossings (using the Geom::crossings function) is 0. This is super slow, however, so my question is: how can I efficiently test whether a polygon is in another polygon? [1] http://xinutec.org/~pippijn/files/txt/5c595dad425061f408f82cc6553a354e.txt -- B.Sc. Pippijn van Steenhoven, Projektleiter Tel.: +49 721 486995-22, Fax: -21 (Achtung! Neue Nummern) Mobil: +49 176 78131934, E-Mail: pippijn@...2685... Open Experience GmbH, Postfach: 111014, 76060 Karlsruhe Besucher: Zirkel 2 (im Rechenzentrum, Geb. 20.20), 76131 Karlsruhe Handelsregister: Mannheim HRB 706815, Ust-IdNr.: DE264743573 Vertretungsberechtigter Geschäftsführer: Konstantin Krahtov

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Nvidia accel lib?
by John Cliff 17 Oct '11

17 Oct '11

Anyone seen anything about the new nvidia path rendering extension? May have some potential, and an nvidia guy responded to a post on the forum offering help if anyones interested in looking at it. http://www.inkscapeforum.com/viewtopic.php?f=28&t=10108 Cheers Sim Sent from my iPad

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Latinoware 2011
by Alexandre Prokoudine 15 Oct '11

15 Oct '11

Hi folks, Is any of our contributors going to Latinoware 2011? We might want telling our community about that, if you are :) Alexandre Prokoudine http://libregraphicsworld.org

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Re: [Inkscape-devel] Inkscape style connectors - usability suggestion
by Hans-Jürgen Hay 13 Oct '11

13 Oct '11

> The main idea was to have two types of connection points: some > default > connection points (as currently only the center is) and user defined > connection points. There would be 9 default connection points: the > center (the > only one available now) and other 8 connection points that you get > when you > draw 8 imaginary lines that connect the center to the corners of the > object's > bounding box and the midpoints of the edges of the object's bounding > box and > intersect these imaginary lines with the object's edge. just as an idea, I would suggest to handle connections more generic. Instead of using default and configurable fixed connection points it would be better to attach directly to the objects outer shape using generic connection points. In this case no predefined connection points need to be shown as the shape is shown in any case. When a handle gets near the shape the shape itself might get highlighted to indicate it will catch the handle when dropped. When the handle gets dropped near the shape it should connect to the shapes outer sub element (e.g. the nearest line of an rectangle) at an offset from its center calculated from the point of dropping the handle using a calculated normal. The Object would store the connection by adding an additional connection object to its connection list. Each connection object would at least need: - a reference to the attached handle, - a reference to the shapes sub element, to which the handle is attached - a relative offset from the shapes sub elements center point. - the normal vector to be optionally used for connecting attached line with an angle normal to the outer shape ( eg. for round objects) - sharp edges and the center of an sub element could be made prefered relative positions to snap to This could allow: * to delete connections when getting disconnected. * no need to handling additional default points * scaling of objects without disturbing the arrangement of the attached handles * allow attachments without code to display additional points/crosses/circles to show the user where he can attach the handle * no need decide in advance on the placement of the default connection point * individual placement by dropping the handle where it should stay * grabbing and moving the handle to a different location along the outer shape I don't know anything of the code base nor do I have any time to work on this in any capacity but envision the idea could lead to better diagram layout and improved usability. Hans -- ---------------------------------------------------------------------- Alterras GmbH, Allersbergerstr. 185-N, D-90461 Nürnberg http://www.alterras.de/, info@...1868..., Tel: (+49) 0911-480039-0, Handelsregister: Amtsgericht Nürnberg HRB 18488 Geschäftsführer: Hans-Jürgen Hay, Helga Sivak -----------------------------------------------------------------------

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End shape tool with tool switch
by Samuel Buttigieg 13 Oct '11

13 Oct '11

Hello all Users/Developers, I was wondering if anyone was effected by this small bug(if you can call it one): sourceforge.net. Basically it means that if you switch from one tool to another before pressing enter, the shape/path drawn is destroyed. Is this intentional or would you like this to be fixed? I am looking for your opinions, be it in favor or against, so that if a lot of people appose this idea I won't waste any time on it. Thanks for your time. Regards, Samuel

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Re: [Inkscape-devel] Snapping to paths broken?
by Diederik van Lierop 13 Oct '11

13 Oct '11

On Thu, 13 Oct 2011 11:15:35 +0200, Tavmjong Bah wrote: > Hi, > > With trunk I am having trouble getting snapping to paths to work > consistently. I was thinking about demoing the new snapping to the > intersection of a path and guide. I can get it to work sometimes but > for > the most part my test rectangle will not snap to anything to do with > a > path. Snapping to the grid and guide lines always works as expected. > Has > anybody else seen this behavior? It seems to not work more often with > complicated drawings (many layers). There are some known issues with the related 2geom code. Nathan Hurst is working on this. I expect that's what you're running into. For more details see this thread: http://sourceforge.net/mailarchive/forum.php?thread_name=20110923205906.GA1… I will let you know when this has been fixed. We can then see if any path-snapping bugs are remaining. > I've also gotten this error message a few times: > > ERROR:widgets/toolbox.cpp:2108:void > toggle_snap_callback(GtkToggleAction*, gpointer): assertion failed: > (ptr != NULL) That's something that I need to fix. Which tool are you using? Can you write down the exact steps leading to these warnings? Thanks, Diederik

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Snapping to paths broken?
by Tavmjong Bah 13 Oct '11

13 Oct '11

Hi, With trunk I am having trouble getting snapping to paths to work consistently. I was thinking about demoing the new snapping to the intersection of a path and guide. I can get it to work sometimes but for the most part my test rectangle will not snap to anything to do with a path. Snapping to the grid and guide lines always works as expected. Has anybody else seen this behavior? It seems to not work more often with complicated drawings (many layers). I've also gotten this error message a few times: ERROR:widgets/toolbox.cpp:2108:void toggle_snap_callback(GtkToggleAction*, gpointer): assertion failed: (ptr != NULL) Inkscape r10675 with Fedora 15. Tav

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Counterproductive commits by Jon
by Krzysztof Kosiński 08 Oct '11

08 Oct '11

Hello I noticed that Jon Cruz is removing forward headers and replacing them with hand-written forward declarations. This is completely backwards! Jon why are you doing this? Regards, Krzysztof

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Write SVG File ascending wise How to ?
by perry-dev 07 Oct '11

07 Oct '11

I have add the one custom dialog in inkscape . In that i provide the on radio button that we mention the object priority Now my svg file save like Now i want to save svg file in ascending order , ascending operation in Priority value , After ascending svg file i want to save file like that i mention below For that i write custom code when user select Object Path .In "sp_item_list_to_curves" function i do ascending operation in Priority value . after that i can get the Priority values in ascending order .. But when i save the file in svg format i can't get output what i want actually..!! -- View this message in context: http://old.nabble.com/Write-SVG-File-ascending-wise-How-to---tp32606645p326… Sent from the Inkscape - Dev mailing list archive at Nabble.com.

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How to Write SVG FILE in reverse ORDER ??
by perry-dev 07 Oct '11

07 Oct '11

Hello Team, Now Inkscape Create SVG File Like Here You can see One more Parameter is Priority .... But i want to Write Same SVG File Like that i mention below from inkscape Code --->> HERE Both SVG file difference so Please read carefully ...!! So Any idea I hope youunderstand what i want to do ? Let me know solution ...!! -- View this message in context: http://old.nabble.com/How-to-Write-SVG-FILE-in-reverse-ORDER----tp32606644p… Sent from the Inkscape - Dev mailing list archive at Nabble.com.

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