[Blindmath] Experience SVGDraw01 by Dick Baldwin

[Richard Baldwin]

Pranav - You are correct in that I originally did correct for the
upside-down problem. However, that later caused so many other problems that
I found it necessary to remove that correction and live with the standard
for SVG. If there is no text in the drawing, it is easy to correct for at
the end through a combination of scaling and translation. However, that
process results in upside-down text, so it is not a general solution.

Steve - Regarding plug-in modules, there are three ways to accomplish that.
First, they can be imported as csv files to create polylines and polygons.
Second, they can be imported as pth files to create path objects. Third,
drawings can be created and saved as SVG files and later imported to be used
as components in a new drawing.

And fourth, the next version that I release will support the importation of
some (and I emphasize some) SVG files created by other programs, such as
www.fooplot.com to be used a s components in a new drawing. However, for
that capability, I have to say that not all elements in all files created by
other programs will be supported.

Thanks to both of you for the feedback.
Dick Baldwin

On Tue, Sep 27, 2011 at 9:31 PM, Steve Jacobson <steve.jacobson at visi.com>wrote:

> Pranav,
>
> I believe he said that the coordinates selected were a result of the
> libraries that he used.  For drawings that are not
> representing mathematical graphs, this may well be the easiest system to
> use inasmuch as it gives one their position in
> a manner similar to that of a word processor.  However, I agree that this
> probably adds a level of learning difficulty for
> kids who might want to use this to do math homework.  I am not saying it
> can't be done, but would would be nice is to
> have the option of translating the coordinates such that (0, 0) is in the
> middle of the screen.  I am not sure what is
> accomplished by moving (0, 0) to the bottom left over the top left since it
> doesn't permit negative numbers on either
> axis.
>
> Having said this, I can see the possibility of doing flowcharts with this
> software, especially with a library of flowchart
> symbols.  Perhaps there might be a way to have plug-ins or front-end
> modules that can assist with different types of
> drawings.  Obviously, we shouldn't depend upon Mr. Baldwin to do it all,
> either, but perhaps look for ways to build on
> his work perhaps after he has given some thought as to how far he is
> willing to take this.
>
> Best regards,
>
> Steve Jacobson
> .
> On Wed, 28 Sep 2011 06:14:08 +0530, Pranav Lal wrote:
>
> >Hi Richard,
> ><snip Remember that the 0,0 origin is at the upper-left corner,
> >positive X values are to the right, and positive Y values go down the
> page.
> >PL] Did you not alter the coordinate system where 0,0 was at the bottom
> left
> >like on a graph paper?
>
> >Pranav
>
>
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-- 
Richard G. Baldwin (Dick Baldwin)
Home of Baldwin's on-line Java Tutorials
http://www.DickBaldwin.com

Professor of Computer Information Technology
Austin Community College
(512) 223-4758
mailto:Baldwin at DickBaldwin.com
http://www.austincc.edu/baldwin/