Hi,

Thanks to those of you who helped me started towards building arcs, 
sectors, etc.  I've completed some classes that are now available from my 
web site (http://www.leonelearningsystems.com/circular_reasoning.htm) and 
are up on SqueakSource under TJ Leone/Circular Reasoning.  I showed a 
version of this at Squeakfest '06 before it was really ready, but folks 
were kind and I got a good list of bugs to take care of.  Now the main 
problem is that colors of sectors and circle segments bleed at certain 
headings, but otherwise things work pretty well.  When the 
CircularReasoning.st is filed in, you get a "Fractures" button in the 
object window that presents the Fracture, Fraction Circle and Fraction 
Circle Frame objects.  Most of the object descriptions have been translated 
into Spanish.  There's also a project to introduce the use of the objects 
for teachers.

--TJ

At 01:10 PM 11/3/2005, you wrote:
>Hi TJ!
>
>When I worked on Stencili, a would-be vector graphics in Squeak, I
>worked on some graphical primitives. Unfortunately, it's been a while,
>and I don't have any of the code handy. To get a head start, your best
>bet may be the Bezier classes that already exist in Squeak. Let me
>know if you need some help getting started. (interestingly, I decided
>to return to Squeak only this week).
>
>Also, some reading on arcs represented :
>http://graphics.stanford.edu/courses/cs248-98-fall/Final/q1.html
>http://www.tinaja.com/cubic01.asp
>http://www.tinaja.com/glib/bezarc1.pdf
>
>The first link shows a specific example of a 90 degree arc represented
>with Bezier segments. The last one is a more generic one.
>
>Bolot
>
>
>On 11/2/05, TJ Leone <tj at leonelearningsystems.com> wrote:
> > Hi,
> >
> > I used to be a programmer at Northwestern.  Maybe we met when I was working
> > on the ITR project?  Anyway, I'm thinking about trying to port an
> > application of mine from Java to Squeak and Je77 said you might be able to
> > help me out.
> >
> > I need a class similar to the Arc2d class in Java.  Have you begun or
> > completed work on anything like this?
> >
> > The application I'm looking to port (called Circular Reasoning) is
> > available for download at
> > http://www.leonelearningsystems.com/circular_reasoning.htm.
> >
> > --TJ
> >
> > >Date:   Tue, 1 Nov 2005 14:30:02 -0500
> > >From:   "Jochen F. Rick" <nadja at cc.gatech.edu>
> > >To:     Eddie Cottongim <cottongim at earthlink.net>
> > >Cc:     tj at leonelearningsystems.com, squeakers at cc.gatech.edu
> > >Subject: Re: [Squeakers] [Fwd: Arcs?]
> > >User-Agent: Mutt/1.4.2.1i
> > >
> > >Hi TJ,
> > >
> > >Bolot was at one time working on something like that. I think he got
> > >pretty close. You may want to contact him. I assume you met him back on
> > >the ITR project. His new e-mail address is bolot at usa.net
> > >
> > >The other people to contact would be the MathMorphs people:
> > >http://www.dm.uba.ar/MathMorphs/
> > >
> > >Peace and Luck!
> > >
> > >Je77
> > >
> > >On Mon, Oct 31, 2005 at 09:47:58PM -0500, Eddie Cottongim wrote:
> > > > I don't think theres anything that does that off the shelf. But there's
> > > > PolygonMorph, which might allow him to build things piecewise. Theres
> > > > also the ST-80 Paths package, that has Arc, Circle, Line, etc, but
> > > > doesn't have drawing support in Morphic.
> > > >
> > > > One  approach to creating "SliceMorph" woud be to subclass PolygonMorph
> > > > and provide some methods to control a fixed set of points from a circle
> > > > point of view. The only difficulty I see here is that for a slice, you
> > > > want smoothing applied to only the points on the outside of the arc.
> > > > Another one would be to look at EllipseMorph and add some arbitrary
> > > > circle properties and use a fancier draw method.
> > > >
> > > > Eddie
> > > >
> > > >
> > > > Mark Guzdial wrote:
> > > >
> > > > >Can anyone give TJ a hand here?
> > > > >
> > > > >-------- Original Message --------
> > > > >Subject:     Arcs?
> > > > >Date:        Wed, 26 Oct 2005 09:03:14 -0500
> > > > >From:        TJ Leone <tj at leonelearningsystems.com>
> > > > >To:  guzdial at cc.gatech.edu
> > > > >
> > > > >
> > > > >
> > > > >Mark,
> > > > >
> > > > >I don't know if you remember me.  We met once a few years ago on a 
> joint
> > > > >project with Georgia Tech, U of Mich, and Northwestern.  I was part of
> > > the
> > > > >Northwestern contingent.
> > > > >
> > > > >Anyhow, I was thinking about using Squeak for some work I'm doing now,
> > > but
> > > > >I can't find a class like the Arc2D class in Java.  I want to be 
> able to
> > > > >create arcs, circle segments and sectors of arbitrary orientation,
> > > central
> > > > >angle, and radius length and change them on the fly.  Is there such a
> > > > >Squeak class?
> > > > >
> > > > >If not, how would I go about creating one?  I'm a total Smalltalk
> > > > >newbie.  I know there's a class called CurveMorph and I think I saw a
> > > > >method called beSmoothCurve someplace, but I don't know anything about
> > > > >drawing programmatically with Squeak.
> > > > >
> > > > >I tried posting this question to squeak-dev, but I haven't heard 
> anything.
> > > > >
> > > > >--TJ
> > > > >
> > > > >
> > > > >TJ Leone
> > > > >Leone Learning Systems, Inc.
> > > > >237 Custer Ave
> > > > >Evanston, IL 60202
> > > > >
> > > > >Email: tj at leonelearningsystems.com
> > > > >Phone: (847) 951-0127
> > > > >Fax: (847) 733-8812
> > > > >Web: http://www.leonelearningsystems.com
> > > > >
> > > > >
> > > > >
> > > > >------------------------------------------------------------------- 
> -----
> > > > >
> > > > >_______________________________________________
> > > > >Squeakers mailing list
> > > > >Squeakers at cc.gatech.edu
> > > > >https://mailman.cc.gatech.edu/mailman/listinfo/squeakers
> > > > >
> > > > >
> > > >
> > > > _______________________________________________
> > > > Squeakers mailing list
> > > > Squeakers at cc.gatech.edu
> > > > https://mailman.cc.gatech.edu/mailman/listinfo/squeakers
> > >
> > >--
> > >Jochen "Jeff" Rick, PhD Candidate, Georgia Tech College of Computing
> > >jochen.rick at cc.gatech.edu, http://www.je77.com/, work: 404-385-1105
> >
> > TJ Leone
> > Leone Learning Systems, Inc.
> > 237 Custer Ave
> > Evanston, IL 60202
> >
> > Email: tj at leonelearningsystems.com
> > Phone: (847) 951-0127
> > Fax: (847) 733-8812
> > Web: http://www.leonelearningsystems.com
> >
> >
> >

TJ Leone
Leone Learning Systems, Inc.
237 Custer Ave
Evanston, IL 60202

Email: tj at leonelearningsystems.com
Phone: (847) 951-0127
Fax: (847) 733-8812
Web: http://www.leonelearningsystems.com