Watch the movie, or read the paper? Movie. ... Keywords Polygon interpolation · Morphing · Shape transformation · Refolding

Technorati Tags: Polygon interpolation,Morphing,Shape transformation,Refolding

Refolding Planar Polygons
Hayley N. Iben · James F. O’Brien · Erik D. Demaine

 

http://www.cs.berkeley.edu/b-cam/Papers/Iben-2006-RPP/Images/iben-2006-RPP.mov

 

www.eecs.berkeley.edu/~job/Papers/iben-2009-RPP.pdf

 

Thanks Hayley, James, and Erik. This really helps.

F# how you think … “19. A language that doesn't affect the way you think about programming, is not worth knowing". By Alan Perlis, "Epigrams in Programming"

 

Looking through other functional programming sites for wisdom to use in F#, found this by Seth Gordon.

http://www.haskell.org/pipermail/haskell-cafe/2006-November/019538.html

[Haskell-cafe] the case of the 100-fold program speedup

“ … In other words, I sped up the code by two orders of magnitude. …”

Seth quoted Perlis, and I concur.

http://www.cs.yale.edu/quotes.html

Bay .NET presentation notice

 

How F#, Many/Multi-Core, and, Parallel and Concurrent Changed My World

Microsoft San Francisco Office
835 Market Street, Suite 700
San Francisco, CA 94103

Wednesday August 19th at 6:30 PM to 9:00 PM*
(Check-in begins at 6:00 PM)

_________________________________________

Event Description:

I'll share my motivations and experiences learning to have FUN with F#.
A quick review of some F# history, a bit more on the state of the F# art, and a few forward looking F# observations.
Start a conversation about building our dreams by harnessing F# to many/multi-cores.
Let's see what we can do with 100,000 times more personal compute power than we had last millennium and a new more expressive language.

Speaker's Bio:

Art Scott's interest in computer graphics started in the 70's; while living at The Berkeley Film House. It led him to a career, as an entrepreneur and intra-entrepreneur, in the Computer Graphic Industry; from Silicon Valley to SoMa.
From circuits to MadAve Art's seen how the power of graphics work; inside and out.
Art is using VS2010, .NET 4, WPF, F#, and multi-/many-cores --
having FUN investigating Tilings and Patterns, and, Parquet Deformations, working on Symmorphmetry, his art project.
Art is a member of the International Society of the Arts, Mathematics, and Architecture (ISAMA); and working on furthering the semasiographic revolution.
licon Valley.

Bay.NET is a California Nonprofit Corporation operated entirely by volunteers and we are proud of our service to the .NET community of the greater San Francisco Bay Area. We regularly provide world-class speakers at no cost to our members. We offer a full-day "Education Day" once every quarter for a nominal registration fee.

Imagining

Let the FUN & games begin

Wednesday, April 01, 2009 10:57:59 AM (Pacific Daylight Time, UTC-07:00)

There is no light without heat...
Some will fight, some will flee.
Consumer visual network for me!
Intel, AMD, IBM I want to watch 4 (at least) games streaming;
To my pixel dust lipstick screen gleaming!
While clicking pizza offer at halftime,
Vid-screening to friends and family distant,
Virtual world interacting and gaming too!
Don’t make me wait while fools debate,
Invest; in parallel and concurrently!

I posted this doggerel at:

http://blogs.tedneward.com/CommentView,guid,F3062E21-FCF4-40F0-AC1F-8E212C931667.aspx#373f88c7-8c44-4691-8957-26b59881170d

Doug Engelbart’s “The Demo” 40th Anniversary Celebration Timeline Mural

Technorati Tags: Engelbart,SRI,Augmenting,Collective IQ,Mural,Timeline,Semasiographic,Visual,Visualization,Past,Present,Future

http://programforthefuture.org/about-us

About the Engelbart Timeline Mural

A graphical chronology 1925-2015 of events that led up to/followed from Engelbart's 1968 demo.  By Eileen Clegg, artist and Valerie Landau, writer.  Signed copies of the mural (3' x 21') will be available for sale soon.

Working on my art project

I posted this comment at http://blog.matthewdoig.com/?p=152

Thanks Matthew et al.

Technorati Tags: Tiling OCaml Haskell F# functors monads composibility functional programming

RE:
" ... I have to admit that just finding a good example was somewhat of a chore, which suggests either functors aren’t used a whole lot by OCaml programmers or nobody understands them. ... " Matthew Doig

" ... but compositionality is the core feature of functional programming. Ocaml style functors and Haskell style monads just aren’t possible in F#. Sure, we can simulate composibility, but the above example shows that it’s still too difficult. ..." Anonymous

" ... I’m just saying: it’s natural to be frustrated when translating a concept in one language to another that doesn’t have direct support for it. ... " Kurt

Is a good example of functors in OCAML, "Tilings as a programming exercise" by Guy Cousineau,  (Theoretical Computer Science 281 (2002) 207 – 217) [also with Mauny "The Functional Approach to Programming"]?

Trying to translate it to F# led to "The Haskell School of Expression, Learning Functional Programming Through Multimedia", by Paul Hudak.

Here's the conclusion:
" Now we can summarize the construction of tilings in one functor that takes all the necessary ingredients as parameters:
module Construct_tiling
(Group: CANONICAL_GROUP)
(Geom: GEOMETRY)
(GenMap: MAPPING with type source = Group.element
and type dest = Geom.transformation)
(GenColorMap: MAPPING with type source = Group.element
and type dest = Permutation.permutation)
(Tile: TILE with type transformation =
Geom.transformation * Permutation.permutation)
=
Make_tiling
(Make_generator_from_canonical
(Make_canonical_generator(Group))
(MakePair (Make_morphism (Group) (GenMap) (Geom.Tgroup))
(Make_color_morphism (Group) (GenColormap)))
(Tile)
This leads to a simplified graphical representation which appears in Fig. 3.
7. Conclusion
What we have obtained is a very generic program that can produce any tiling with a computable symmetry group that operate transitively on the tiles. ..."