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Re: [Inkscape-user] Extracting formulas from curves?
by Philip Rhoades 16 Mar '09

16 Mar '09

Felipe, I have a statistical relationship in mind and I find it is convenient to use Inkscape to create the graphs of what I think it should look like under different conditions. Having done that, it would be nice to be able to extract the formula for each curve that I have drawn. The curve of the relationship that I am thinking of should have only a single y value for each x coordinate, so it should be a function. Thanks, Phil. > From: Felipe Sanches <felipe.sanches@...2592...> - 2009-01-30 02:02 > well.. maybe. > it is a bezier curve. It is a parametric curve whose coordinates are > defined by quadractic equations: > x(t) = a*t² + b*t + c > y(t) = d*t² + e*t + f > finding the values of a,b,c,d,e and f involves looking at the > coordinates of the control points of that curve and doing a bit of > math > Not all bezier curves can be described as 1 parameter functions, > though... I think that it is indeed possible to do that with the one > you provided since it appears to have a single y value for each x > coordinate, thus it satisfy the requirements to be called a function. > what are you trying to do with this math stuff? > On Thu, Jan 29, 2009 at 10:14 PM, Philip Rhoades <phil@...2593...> wrote: > > People, > > > Is there a way of extracting the formula for the curve from the attached svg > > ie in something resembling a conventional y = f(x) format? > > > Thanks, > > > Phil. > -- > Philip Rhoades > > GPO Box 3411 > Sydney NSW 2001 > Australia > E-mail: phil@...2593... -- Philip Rhoades GPO Box 3411 Sydney NSW 2001 Australia E-mail: phil@...2067...

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user requires help on Mac
by Taraben Adib 16 Mar '09

16 Mar '09

Hello Mac Users, I received an email from a mac user requireing some help. See email below: He can not print. The error message says "errror while opening the printer connection" As I am not an mac user I can not help. Is there someone able to help? Greez, Adib. --- >Hallo, ich habe Ihr Programm auf meinem Mac und finde es super, jedoch kann ich keinen Drucker damit aktivieren. >Die Fehlermeldung lautet : Fehler beim öffnen der Druckverbindung. >Vielleicht können Sie mir helfen ? >Mit freundlichem Gruß: O.Adler >--

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eraser tool opinions?
by bulia byak 15 Mar '09

15 Mar '09

Now that the Eraser tool is in SVN for quite some time, what do people think of it? Is it useful? In what mode do you use it, if at all? Disclaimer: as you may remember I was against this tool from the beginning, considering it redundant. Its Delete mode is equivalent to Alt+drag followed by Del in Selector, and its Cut mode is now equivalent to Alt+drag in Calligraphic pen which I just added: * When drawing with <b>Alt</b>, Inkscape <b>subtracts</b> the path you have created from the selected path (with <b>Shift</b>, it adds to the selected path). This allows you to quickly patch or fix problems in a stroke you have drawn without leaving the tool. So, do we really have to spend the prime toolbar space on a tool which does what other tools already do? -- bulia byak Inkscape. Draw Freely. http://www.inkscape.org

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Prezi-like functionality
by Arnout Standaert 12 Mar '09

12 Mar '09

Hi list, Probably some of you have already seen Prezi, an web application for "non-linear" presentations. That doesn't sound too clear, but see http://www.prezi.com for an example, or http://www.aether.hu/prezi for an introduction. It basically breaks the traditional slide-show format of presentations and turns it into a fancy dynamic flight-simulator-like concept. Very refreshing and ubercool after years of Powerpoint slides :-) As far as I know, there is currently no other software doing something like this. But IMHO, Inkscape would be very much suited for this. Currently, it has the ideal editing tools to compose the presentation material itself, but it lacks the animation interface to provide the navigation and zooming aspect in the presentation itself. With all the SVG animation plans, Prezi-like presentations would seem to be within reach. My question: are there tools/applications available that provide the zooming/path-based animation functionality for Inkscape-produced SVG files? Or can this be done using Inkscape itself and scripting (Javascript?)? I suppose the latter would come down to hand-coding and building a lot from the ground up, or are there tools available that can help with that? Opinions and suggestions appreciated, wwwald

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Web based integration?
by Jason Hawley 10 Mar '09

10 Mar '09

Is anyone aware of a web based (browser compatible) application of inkscape? Cheers, Jason

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Trim/extend feature questions
by Kalman KHIRALY 09 Mar '09

09 Mar '09

Hi! I would like to achieve a trim/extent feature like in many CAD-like application can be found. Here is a little screenshot what I trying to do: http://khiraly.googlepages.com/trim_extend.png Here are the steps what I did: There are two lines and a circle, so 1. I converted the circle to path 2. I opened up the circle 3. I duplicated the line, and go to the Path->Cut Path menuitem 4. I repeated the above step to the other line Sadly this precedure involves some imprecisement, I zoomed into, and created this screenshot: http://khiraly.googlepages.com/circle-imprecise.png Can somebody propose a precodure where the result is mathematically correct, and does not have imprecisement? Needless to say, that I cant union the three paths together... Or should I wait until a trim/extend tool arrives? (I use rev 20844, from today) Any ideas? Best regards, Khiraly

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wacom and linux
by Donna Benjamin 09 Mar '09

09 Mar '09

Hi Everyone, I've been asked to get an idea of who is using linux desktops for graphic work. Are you using a wacom tablet with inkscape / gimp / blender etc on linux? If yes, can you send me a brief outline of who you are and how you're using it? Work? Play? Art? Industry? Age? Country? Feel free to spread the word if you have friends using linux for graphix get 'em to drop me a note too. cheers! Donna -- Donna Benjamin - Executive Director Creative Contingencies - http://cc.com.au ph +61 3 9326 9985 - mob +61 418 310 414 open source - facilitation - web services

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Enlarged Area of Drawing
by hippie dream 03 Mar '09

03 Mar '09

Hello Inkscape List, Thanks for a wonderful program. I have a fairly simple question which I can't figure out from internet searching. I am making a diagram and I would like to have a box in the upper left hand corner of the drawing show an enlarge portion of my drawing. 1) Is there an easy way to do this? By easy I mean if there an option for a box that limits graphic to inside the box... kind of .svg within an .svg? 2) If not and I have to do it manually, then I will relate my other problem right now. I was going to do this manually by drawing a rectangle then simply copy/paste the necessary items into my box to manually create the enlarged area. But for some reason whenever, I try to draw rectangle I get nothing but a box of dashed lines that disappears as soon as I don't click on it. Any suggestions on what I might be doing wrong? Anyways thanks alot in advance. I am running Ubuntu 8.10 Sam -- View this message in context: http://www.nabble.com/Enlarged-Area-of-Drawing-tp22290789p22290789.html Sent from the Inkscape - User mailing list archive at Nabble.com.

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Inkscape new Interaface Icon sizes
by Plácido Sousa 03 Mar '09

03 Mar '09

Hi, I am trying to update the default icon set. I' ve Installed development versions os inkscape in both Linux and Windows There's a new interface options in setting where you can choose from small/medium/normal icons (cool). normal :: 24x24 px medium :: 16x16 px ?!? small :: 16x16 px Can anyone (developer - probably not the best place to ask this!!!) confirm that this is the way inkscape is going. previously some icons were 22x22 px I am considering doing two icon files - 16x16 :: small - 24x24 :: normal It would be even better if both icon's sizes could be in the same place so that inkscape picked the correct size. In my opinion, at such a small size, vectorial icons don't scale in a sharp way. -- > Plácido André Sousa http://chezplacide.blogspot.com placidoaps@...155... .-. /v\ L I N U X // \\ >Phear the Penguin< /( )\ ^^-^^

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Splitting/break apart text
by Gunnar Lestander 03 Mar '09

03 Mar '09

I have imported a PDF with a electronic schematic and have found that text are kept together all over the drawing and not just over linebreaks. XML editor looks like: ==========================- <svg:text id="text1"> <svg:tspan id="tspan1"> "Choose power supply" <svg:tspan id="tspan2"> "with jumper" <svg:tspan id="tspan3"> "between A, B, or C" <svg:tspan id="tspan4"> "R1" <svg:tspan id="tspan5"> "R37" ==========================- They are positioned in the big drawing like this : Upper right corner: "Choose power supply with jumper between A, B, or C" Low to the right: "R1" Center of drawing: "R37" Is there a simple way to break them apart to single lines of text so I can handle/move them individually? Commando, macro or something else to give me somthing like this: ================== <svg:text id="text1"> <svg:tspan id="tspan1"> "Choose power supply" <svg:text id="text2"> <svg:tspan id="tspan2"> "with jumper" <svg:text id="text3"> <svg:tspan id="tspan3"> "between A, B, or C" <svg:text id="text4"> <svg:tspan id="tspan4"> "R1" <svg:text id="text5"> <svg:tspan id="tspan5"> "R37" ===================== // Gunnar Lestander (Sorry if this becomes a repost, since I haven't received a copy from the list to myself)

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