[Blindmath] A 3d to 2d description resource?

[Richard Baldwin]

If you go to http://www.access2science.com/rbg/GAME2302/Math1004.htm, you
will find links to a tutorial by Dr. Bradley Kjell, who is a college
professor in California titled Vector Math for 3D Computer Graphics.

With Dr. Kjell's permission, I am in the process of updating that material
to make it accessible as I have time to work on it. I still have a way to
go, but eventually I will complete it. Along the way, I will supplement it
with both svg and sig image files created from the bitmap files provided by
Dr. Kjell so that readers having embossers that are compatible with those
file types can emboss the images.

Be aware that the mathematical aspects of 3D to 2D projection are not for
the mathematically faint of heart.

Dick Baldwin

On Mon, Jan 30, 2012 at 9:14 PM, John Gardner <john.gardner at orst.edu> wrote:

> Hi Pranav, no ViewPlus doesn't have anything that would help explain how to
> draw 2d images of 3d reality.  This seems to be one of the most difficult
> things for most congenitively blind people to understand.  As a person who
> was sighted for much of my life, I understand it intuitively but have never
> tried to explain it to someone who didn't understand it.  The idea of
> projection should not be too difficult.  But projection is only a tiny part
> of drawing images.  Dick's tree had lines that were supposed to look like
> bark.  That is an image of texture - which is somehow much more difficult
> to
> explain.
>
> If anybody would like to organize an archive of images and tutorials that
> could explain the principles of 3d to 2d projections understandable by
> blind
> people, it would be a good subject for the www.Access2Science.com web
> site.
>
> John
>
>
>
> -----Original Message-----
> From: blindmath-bounces at nfbnet.org [mailto:blindmath-bounces at nfbnet.org]
> On
> Behalf Of Pranav Lal
> Sent: Monday, January 30, 2012 5:36 PM
> To: blindmath at nfbnet.org
> Subject: [Blindmath] A 3d to 2d description resource?
>
> Hi all,
>
> Would it be worth creating a database that listed descriptions of 3d
> objects
> in 2d space? Take my example of a tree. I have felt trees before and can
> even see their pictures with the vOICe but how do I map that to the 2d
> space? I suspect View Plus already has such a collection but there is no
> reference to 3d since SVG is 2d.
>
> Of course, if there is a general approach in mathematics of converting 3d
> to
> 2d then all we would need to do is to write about it with some examples and
> see if that helps anyone.
> 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/