Red Spiral Challenge
by Aaron Elmquist
Does anyone know how to creat the red spiral with the continuous gradient in
Tavmjong Bah's "A Guide to Inkscape" I took a couple cracks at it last
night without much sucess.
~Aaron
13 years, 8 months
Re: [Inkscape-user] Extracting formulas from curves?
by Philip Rhoades
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...
14 years
eraser tool opinions?
by bulia byak
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
14 years
Iconset
by Plácido Sousa
Hi all,
I've been improving (I think!) the inkscape iconset (work in progress).
I've resized and simplified some of the icons to make them look better in my
Linux distro (Ubuntu 8.10 - haven't tried others).
If the feedback is positive I'll try them in Microsoft Windows to see what I
can do! (Sorry! I don't own a Mac)
SVG file - icon.svg - and a screenshot as an attachment.
bye
--
> Plácido André Sousa
http://chezplacide.blogspot.com
placidoaps@...155...
.-.
/v\ L I N U X
// \\ >Phear the Penguin<
/( )\
^^-^^
14 years, 1 month
why doesn't this work?
by Elwin Estle
I am trying to make a simple wedge shape that is 1/6 of a hexagon.
So I used the polygon tool to make a hexagon. I convert it to a path. I duplicated it, shrunk it down some and used a boolean operation to cut a smaller hex shaped hole in the exact center of the larger hexagon.
Then I used the node tool to select the extraneous nodes and delete them. Now I have two lines, both part of the same path, but not connected. When I select two end points on the lines and try to join them with a new segment, I get an error saying I haven't selected two nodes!!!
So just for the heck of it, I used the bezier tool to make two separate lines, combined them to a single path and then tried to connect two end nodes with a new segment. Worked just fine. I could try to do the shape I am after this way, but getting everything positioned right might be something of a pain.
I am just wondering why the first technique doesn't work. Seems like it should...
14 years, 1 month
Remove Object Fill and Stroke in Palette
by Plácido Sousa
Hi,
In some programs I remember to see a "color palete" (white with a red cross)
to remove the color of object Fill or Stroke.
Is there a similar thing with Inkscape?
--
> Plácido André Sousa
http://chezplacide.blogspot.com
placidoaps@...155...
.-.
/v\ L I N U X
// \\ >Phear the Penguin<
/( )\
^^-^^
14 years, 1 month
