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.
> 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
> 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
> > ie in something resembling a conventional y = f(x) format?
> > Thanks,
> > Phil.
> Philip Rhoades
> GPO Box 3411
> Sydney NSW 2001
> E-mail: phil@...2593...
GPO Box 3411
Sydney NSW 2001
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?
Inkscape. Draw Freely.
I have been using Inkscape the last 2 years for my professional work.
I use it mainly for scientific illustrations.
So first of all I'd like to congratulate the Inkscape team for their great
and important role in the open source community. Inkscape is for my type
of work the best -and only- alternative for expensive software like
I'm using Ubuntu 8.10 and GNOME. I'm using inkscape mostly for
schematical purposes: flow charts, electrical or scientific diagrams,
Since I'm new to this group, I don't really know the etiquette, but I'll
start with my whishlist. Sorry about the length of the list...
(Please feel free to comment)
* Multiple pages.
* Printing: I have issues with it. I cannot set the type of paper for my
printer, and the result is often a bad layout.
* GRID snapping is a little nightmare for my kind of work. Right now,
Inkscape has "snap nodes" and "snap bounding boxes". Both of them are
not suitable for me. Suppose you draw an object with irregular shapes
(e.g. a group of polygons and text).
There should be a modus: "move by reference point". The reference is
snapped on the grid, and when moving, the destination of the object is by
snapping the reference point ONLY.
If you move the object on a grid of say 10px, the object should ONLY move
in steps of 10px without exception!
As it is now, objects snap on any of the irregular shapes inside it (e.g.
text, irregular polygons, etc..) and when you draw schematics, you don't
Furthermore, there should be a way to do "Snap to bounding boxes" with
snapping to the CENTER of a thick line, NOT to the OUTSIDE of the thick
Example: enable "snap nodes" and "snap bounding boxes". Draw a circle.
The vertices will nicely align on the grid, that's how I want it.
Now scale the circle by dragging the handles. Now, the circle will be
* Symbols: being able to make template symbols and insert them in your
drawing. The symbols should have a reference point (see snapping), and
parameterizable text would be great. The instances should be LINKS to the
symbols, so if you edit a symbol, it should change all references.
Associated features if you right-click on an instance: "edit template",
"edit as new template", "make group object copy"
* Being able to use objects from another .svg with a link. This way, we
can make libraries of symbols.
* Arrows: arrow heads should change color by changing the color of the arrow.
* Swap arrows: a button to swap the beginning/end arrows. Would be very
* Styles: a custom list of styles Fill+Outline+Text font you can click on
to set an object style. Also, double click on a style to set it as
'default'. Today, I have to click around in that dialog too often.
* Fill and Outline paint swatches: list of default colors. Standard color
lists, like web colors, pantone, etc...
* Bug in the software today: exchanging objects across files via the
clipboard does not work.
* Dialog boxes: you should be able to save their layout! Now I have to
open and position them every time I open a file
* Dialog boxes: share dialog boxes for different files. I use the program
in the same way as we use "GIMP": different open files, and floating
dialogs. However, if I click on a dialog box, Inkscape immediately
selects another open file, because the dialogs seems to be 'linked' with
the document windows.
* Text dialog: it seems to be different (not dockable) than the other
dialog boxes. I wonder why...
That's all for now...
Please let me know if this kind of input is useful, and if anybody of the
developers is reading this (otherwise, I would not bother typing it next
Happy new year,
I'm a user of Inkscape, mainly on Windows and very (very) rarely on Xubuntu and Ubuntu.
I checked in SVN for the SVG Tango icons and found the file, which I studied carefully.
N.B.: I'll give here my "user" point of view, which reflects my taste and my rationale. Please, forgive me if this message isn't always "nice"... it's not meant to be aggressive, it's just that tastes in icons/applications is a passionate thing - so I'm allowed to tell my mind with passion on the matter :-)
Well, re. the proposed Tango icon set for Inkscape... I do NOT want to be "forced" to test the Tango icons - let alone to be forced to use them. I hate the Tango icons. :-)
The main reasons are:
- they are unreadable, "undecodable".
I do not need to use a magnifying glass to "decode" the current (non Tango) icon set, the icons are "sharp" and "clear". Compared to them, the Tango icons are... "wtf?... which icon is that...?" I do not want to lose time wondering each time I need to click on an icon (and it happens quite a lot in Inkscape, because I don't use the shortcuts or F-keys). Honestly, I hardly *see* the Tango icons.
- they belong to the Linux world.
I know they are supposed to be suitable to multi-platform applications, but in the real reality, this isn't the case, and they say "Linux", they say GTK or KDE. As I said before, I use Inkscape on Windows. Why would I need "Linux-like" icons which clash so badly with any Windows (or, I guess, Mac) theme and which I cannot decode anyway?
- I do not use any other "free" software which uses the Tango icon set, such as The Gimp or..., so I don't care about "being used" to seeing such or such icons.
- I believe each application can have its own style, its own icons. I hate the "applications on a platform must all look alike" concept, it's sterile, it's boring, it's dull.
So, my user opinion is: if the Linux users are masochists and want to have Tango style icons for Inkscape, fine, give them a GUI to switch to Tango icons.
Me, as a user of Inkscape on Windows, I just want clear, sharp, and decodable icons - just like the current icons! I pray you, Inkscape developers, please, keep the current default set as the default!
Thanks! (and again... no personal attack here :-)
I want to introduce Inkscape to the SENA
<http://www.sena.edu.co/portal>office here in Cartagena
de Indias <http://www.flickr.com/photos/mariedoucet/sets/72157611795508388/>.
The SENA is the national service for training people in several trades. The
goal is to convince them to try Inkscape and use it as the program of choice
for graphic design courses. I have got technical info and examples, now I
need all your Inkscape success stories from everywhere -specially on
developing countries and Latin America- about Inkscape achievements and use
in working, running business and being involved in big events or campaigns.
By the way, a database of succes stories should be built.
I am evaluating dxf input...
found this: https://bugs.launchpad.net/inkscape/+bug/293940
and can find the dxf_import files mentioned in the install
but there is no .dxf option in the import file formats list...
is anyone else doing that successfully?