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All Shapes in One Equation?

asadodetira writes ""One simple equation can generate a vast diversity of natural shapes, a Belgian biologist has discovered. Nature has the story. "The Superformula" sounds impressive, apparently its only for shapes, i thought you could solve lots of PDE's or tensor integrals or something with this, but not, it's only for shapes."

74 comments

  1. It's only for shapes by 7-Vodka · · Score: 1, Funny
    "The Superformula" sounds impressive, apparently its only for shapes"

    Yeah, what useless crap. It only applies directly to everything we know in the universe. Such crap! why doesn't it cook me breakfeast?

    --

    Liberty.

    1. Re:It's only for shapes by Bastian · · Score: 0, Redundant

      Yeah, what useless crap. It only applies directly to everything we know in the universe.

      No really, it isn't all that useful. If it were somehow applicalbe to partial differential equations, for example, it might offer a simple way of handling many engineering problems.

      Granted, being able to describe shapes with a function can be terribly useful, as it might then become possible to use linear algebra or calculus to directly solve various problems relating to that shape's geometry rather than approximating a solution.

      But still, that's just shapes. There's a lot more to the universe than shapes. And no, I'm not willing to consider something like a function of two variables a shape just because it can be plotted in three dimensions.

  2. sounds familiar by ddd2k · · Score: 4, Interesting

    Changing one term in the formula varies the proportions of the shape - moving from a round circle to a long and skinny ellipse.
    This reminds me of the eccentricity ratio, C, of a conic function. It relates the parabola, hyperbola, and elipse. (eg, the parabola is the perfect shape as it has a eccentricity of 1 and the hyperbola >1 while the elipse is 1) However, im curious to what he did to transform a circle into various other shapes, which he did not mention in the article. big secret? ;-)

    1. Re:sounds familiar by TrebleJunkie · · Score: 2, Funny

      Shit, it reminds me of Spirograph.

      --

      Ed R.Zahurak

      You know, oblivion keeps looking better every day.

    2. Re:sounds familiar by eggstasy · · Score: 2, Insightful

      He added a varying radius instead of a constant one and felt very manly about it. Woop-dee-doo.

    3. Re:sounds familiar by spRed · · Score: 1

      Fascism:Extreme right-wing dictatorial government,belligerently nationalist,that merges state and business leadership

      1 - You know this is an exciting article when people are replying to sigs

      2 - Socialism: Moderate left-wing totalitarian government, usually post-nationalist, where people smarter than you spend your money to save you from yourself. [Usually has much better slogans than the above, although the phenomenon has not been studied]

      --
      .sig Karma out the wazoo, better to spend points elsewhere if this is above 2 or below 0
    4. Re:sounds familiar by demi · · Score: 1

      That's what I thought when I read the article. And not for nothing either I think, since it sounds like that's what it's modeling.

      --
      demi
    5. Re:sounds familiar by eggstasy · · Score: 2, Funny

      1 - LOL
      2 - Thanks. You know you finally found a decent sig when someone replies to it :)

    6. Re:sounds familiar by Mr.+Slippery · · Score: 1
      Socialism: Moderate left-wing totalitarian government, usually post-nationalist, where people smarter than you spend your money to save you from yourself.

      No.

      Socialism: an economic system in which capital is controlled by workers (the people who use the capital to get stuff done). Comes in free-market and command-economy flavors. Contrast to capitalism, where capital is controlled by state-designated owners.

      It's sad that the legacy of Palmer, McCarthy, and Hoover thrives to the extent that most Americans think socialist -> totalitarian.

      --
      Tom Swiss | the infamous tms | my blog
      You cannot wash away blood with blood
    7. Re:sounds familiar by Anonymous Coward · · Score: 0

      Hear, hear.

      And where, pray tell, do many of the most successful capitalists store their cash? Socialist Switzerland.

    8. Re:sounds familiar by Valdrax · · Score: 1

      Thanks for reminding me to update my meta-sig. Sigs about moderation are soooo passe, now. Bitching about or in favor of the war is the "in" thing, now.

      --
      If it's for-profit but free, you're not the customer -- you're the product (e.g., the Slashdot Beta's "audience").
    9. Re:sounds familiar by Anonymous Coward · · Score: 0

      Chinese Population: 1,284,303,705
      Chinese Gross Demostic Product: $6 trillion
      United States Population: 280,562,489
      United States Gross Domestic Product: $10.082 trillion

      China has 4.5 times the population, but produces almost half as much. Communism/Socialism doesn't work. It removes the personal motivators involved with maximizing production and minimizing waste. Stop trying to ruin the world with your mind-rot socialistic crap. If you like socialism so much, go live in China. Be sure to pack a lunch, because they might not be able to feed you.

      Socialism=Lack of Individual Motivation and Responsability.

      When you remove the individual motivators for a person to working harder than his neighbor, that person stops working harder than his neighbor. The economy becomes shit, life becomes harder, and you ruin my life. I find your words offensive and aggresive apon what I hold dear, so go slosh your shit in some other country.

    10. Re:sounds familiar by nagora · · Score: 1
      most Americans think socialist -> totalitarian.

      In fact most Americans seem to think that socialism is the same as communism and that they're both Stalinism. The AC that replied to you earlier is a good example of this sort of retarded world-view.

      TWW

      --
      "Encyclopedia" is to "Wikipedia" what "Library" is to "Some people at a bus stop"
  3. Shape eh... by Anonymous Coward · · Score: 3, Funny

    As an average /.'r I'm definitely out of shape.

    Hopefully this will allow me to program a new shape.

  4. One equation... by icemax · · Score: 4, Funny

    One equation to rule them all, one equation to find them one equation to bring them all and in the darkness bind them...

    now THAT's a nice ring-shape

    --


    __________
    Love conquers all... except CANCER
    1. Re:One equation... by mbogosian · · Score: 1

      One equation to rule them all, one equation to find them one equation to bring them all and in the darkness bind them...

      You laugh, but (from the article):

      Gielis has patented his discovery, and is developing computer software based on it. Using one formula to produce shapes will make graphics programs much more efficient, he says. It might also be useful in pattern recognition.

      On another "note":

      References

      1. Gielis, J. A generic geometric transformation that unifies a wide range of natural and abstract shapes. American Journal of Botany, 90, 333 - 338, (2003). |Article|


      Didn't this guy have a musical group or something?

  5. Shapes are cool by Sevn · · Score: 2, Interesting


    So like if it's only for shapes then I'm cool with
    it too cause yanno like shapes are cool and stuff.

    But seriously,
    Bummer. Graphics realism and speed could probably be
    greatly enhanced with a technology burned into the
    firmware that can make any shape with one equation.
    That could be a neat way to do a lot of things. In
    the very least it could be a new way to precache
    memory if you think about it. Or something.

    --
    For every annoying gentoo user, are three even more annoying anti-gentoo crybabies. Take Yosh from #Gimp for example.
    1. Re:Shapes are cool by eggstasy · · Score: 2, Insightful

      Ever saw the "flower" visualization thingy for winamp?
      Its the same thing!
      Look, you can plot the graph of a function on a typical 2D cartesian X,Y reference frame or you can plot it in a circular reference frame where Y is the distance from the center at which you plot and X is the "degree" where you plot it.
      So if you plot a constant C in the 1st ref. frame you get a straight horizontal line at Y=C and on the 2nd one you get a straight circle where the radius = C.
      If you plot a function, like a sine, it will make a wavy pattern along a line, or along a circle - RESEMBLING FLOWERS - like the winamp vis plugin...
      This is a trivial mathematical fact and less innovative than the crap MS spews out every other year. Does anyone know where I can read the stupid paper without subscribing to that site?

    2. Re:Shapes are cool by g4dget · · Score: 1
      Graphics realism and speed could probably be greatly enhanced with a technology burned into the firmware that can make any shape with one equation.

      It's called a "Pentium". It's a highly sophisticated, evolved equivalent of a recursive function. There is rumored to be a number of utilities for it that make it easier to input, output, and compose those functions.

    3. Re:Shapes are cool by Hast · · Score: 1
      Does anyone know where I can read the stupid paper without subscribing to that site?

      Atleaast I can view the paper without any subscription.

      Also the guy is a botanist, not a mathematician. And the journal he published in is a botanical paper. So I don't think it's surprising that it passed the checks.
  6. Well i claim prior art by eggstasy · · Score: 1, Insightful

    For gods sake, a stupid little Qbasic program i wrote years ago could ALSO generate a lot of different shapes like those using modified circle equations. I called it a "2d renderer" and didnt think it was anything significant. I still dont think it is of any significance and wonder why the hell there are so many crappy trivialities being passed off as important research breakthroughs.

    1. Re:Well i claim prior art by DoraLives · · Score: 1
      For gods sake, a stupid little Qbasic program i wrote years ago could ALSO generate a lot of different shapes like those using modified circle equations. I called it a "2d renderer" and didnt think it was anything significant

      It wasn't.

      I [snip] wonder why the hell there are so many crappy trivialities being passed off as important research breakthroughs

      From the article: "It's a new way of describing nature," and The Superformula might provide a single, simple framework for analysing and comparing the shapes of life, believes Niklas. "This is an exciting development." and Using one formula to produce shapes will make graphics programs much more efficient, he says. It might also be useful in pattern recognition.

      But I guess you're right. Why in hell are there so many crappy trivialities being passed off as important research breakthroughs?

      --
      Is it fascism yet?
    2. Re:Well i claim prior art by eugene+ts+wong · · Score: 2, Funny

      Instead of fighting them, let's join them. I'll patent x^2 and you patent x^3. Just think about how rich we'll be.

    3. Re:Well i claim prior art by ASCIIMan · · Score: 1

      Sorry, I claim prior art on x^n. ;)

    4. Re:Well i claim prior art by Rick+the+Red · · Score: 1
      --
      If all this should have a reason, we would be the last to know.
    5. Re:Well i claim prior art by Cy+Guy · · Score: 2, Insightful

      Wow, this is one of the most negative threads I've ever read on SlashDot, and that is saying a lot. Yes, it does seem trivial. And Yes, he shouldn't have patented it. But let let me put my analysis into terms the the typical SlashDot reader should be able to appreciate:

      Using one formula to produce shapes will make graphics programs much more efficient,

      That means faster and more realistic video games and Sci-Fi/Fantasy movies folks, what could be bad about that?

    6. Re:Well i claim prior art by Elbelow · · Score: 1

      Using one formula to produce shapes will make graphics programs much more efficient,


      Ah, but is this necessarily true? Using a single representation may be more elegant or more convenient, in the sense that it allows the creation of programs that allow you to manipulate shapes in "natural" or "intuitive" ways. For the highest performance, it may however be preferable to use an optimized equation for the specific shape that you are drawing.

    7. Re:Well i claim prior art by quantaman · · Score: 1

      That means faster and more realistic video games and Sci-Fi/Fantasy movies folks, what could be bad about that?

      Yeah but we don't actually know anything about the size or complexity of the formula. That's why most graphics use simplexes to model shapes (ie simplest shape in n -dimensions) like a triangle in 2-D or tetrahedron in 3-D depending on what you need. I can currently model a cube with 12 triangles or 5 tetrahedrons and only 8 vertices, how many would I need with this formula? I'm sure this formula does have its applications but until we can actually see it I'm going to bet that it won't be in your next fps.

      --
      I stole this Sig
    8. Re:Well i claim prior art by pseudonymouse · · Score: 1
      That means faster and more realistic video games and Sci-Fi/Fantasy movies folks, what could be bad about that?

      As someone who as done 3D graphics work, I found the article rather depressing. Getting different shapes based on variations of the circle equation is very old work, and very commonly known (as a child I first read about the idea in a Piers Anthony novel).

      And now this guy is patenting whatever he imagines he's discovered. Graphics Gems has some much more clever ideas in every book, and fortunately that work was published without strings attached, or producing 3D-graphics-related hardware or software might have become an unnegotiable legal minefield.

      It seems to me people like this tend to make progress in any given field slower, so yes, my reaction to this alleged discovery was negative. On the other hand, this article tells us that after a 20 year absence, we will once again be able to see a Javan bateng. Now that's exciting.... :)

      --
      In a free society you are who you say you are. -- Mumford
  7. Dude, you totally made that up by Anonymous Coward · · Score: 0

    And you know it.

    But that's some good bullshit so MOD THIS UP

  8. Beautiful Shapes by mc_barron · · Score: 3, Funny
    "When I found the formula, all these beautiful shapes came rolling out of my computer,"

    Ahh...reminds me of when I first got past the Trivia Quiz Age Check questions in Leisure Suit Larry.

    What's amazing is that this question was in the 1987 release (no joke):

    O.J. Simpson is
    a. an R & B singer.
    b. under indictment.
    c. embarrassed by his first name (Olivia).
    d. no one to fool with.
    Correct answer: d

    Duh.

    1. Re:Beautiful Shapes by Henry+V+.009 · · Score: 1

      Oh god, that's so awesome. Leisure Suit Larry was truly the cultural achievement of that decade.

    2. Re:Beautiful Shapes by Anonymous Coward · · Score: 0

      How many people picked b and got it wrong, I wonder...

    3. Re:Beautiful Shapes by Anonymous Coward · · Score: 0
      O.J. Simpson is
      a. an R & B singer.
      b. under indictment.
      c. embarrassed by his first name (Olivia).
      d. no one to fool with.
      Correct answer: d


      Wow... I think I know one person, who didn't get that memo.
    4. Re:Beautiful Shapes by Anonymous Coward · · Score: 0

      speaking of that, during the test you could hold down ctrl and alt and then hit the 'x' key to skip the test entirely ;)

  9. What's New by frantzdb · · Score: 3, Interesting

    The full text appears not to be available online. All of the examples look like simple polar functions. I find it hard to believe that someone discovered a fundamentally new equation for r(\theta).

    --Ben

    1. Re:What's New by mTor · · Score: 1
      It is available online but it's not free (unless you have a subscription to AJB):

      http://www.amjbot.org/cgi/content/abstract/90/3/33 3

  10. Patented it? WTF? by MacJedi · · Score: 3, Interesting
    WTF? He found an equation that can describle all kinds of fundamental shapes and he PATENTED IT?!

    Call me old fashioned, but I don't think you should have the right to patent maths!

    /joeyo

    --
    2^5
    1. Re:Patented it? WTF? by bob_jordan · · Score: 1

      Maybe Spirograph could claim prior art.

      Bob.

  11. scary by gyratedotorg · · Score: 1

    "The Superformula is a modified version of the equation for a circle."

    "Gielis has patented his discovery, and is developing computer software based on it."

    well, thats more than a little bit scary. i didnt know formulas could be patented. is this something new, or am i missing something?

    --
    Gyrate Dot Org - "Where high-tech meets low-life"
    1. Re:scary by turgid · · Score: 1

      Roger Penrose patented his tesselations a few years ago. Yes, it's not ethical. Mathematics should not be patentable, otherwise we'll decend into a new Dark Age.

  12. Java applet visualisation by FrenZon · · Score: 4, Informative

    I have a java applet online that allows you to fiddle with the values in the equation and generate the 'super'shapes in realtime:

    bodytag.org/supershapes1/

    1. Re:Java applet visualisation by Anonymous Coward · · Score: 0

      java.util.zip.ZipException: invalid EXT descriptor signature

      How bout some source, so's we can try compiling it on our own w/o rewriting the wheel? :)

  13. Real world? fractals by ptaff · · Score: 2, Informative

    I doubt we can do anything with that formula to express Nature's art. Sure, we can build simpler graphical engines, but that's it.

    I don't know how far this "transformed circle formula" is from a circle formula, but as long as it's an integer-dimension thing, we get nothing from it. It doesn't scale.

    The concept of locality is too important - the behaviour of a cell is really parametered by its neighbors; the same ADN is in your brain, your liver and your nails.

    Fractals are still a relatively simple method of describing 3D structures - sure it's really hard to start with a real object and map it to a fractal (but Nature works the other way around!). A very small disturbance can create as many shapes as you want; the number of different vegetal organisms showing very similar DNAs seem to support this.

    1. Re:Real world? fractals by zeugma-amp · · Score: 2, Insightful

      The first thing I thought when I saw this article was, "sounds like this guy has discovered fractals". What he's describing would appear (from the limited information provided) to be a fractal equation. It will be interesting to see how easily it is incorporated into Fractint. Fractint currently has about 70 or so different types of fractals that you can tweak, play with, and zoom into to your heart's content.

      There is a lot of cool art on the fractint homepage as well as come descriptive information about fractint and the history of the program, which is currently on version 20.0. I've been playing with the program off and on for about 8 years I guess, and think it is the best fractal generator out there.

      For those of you not running DOS, try XFractint. The program has a funky install (imo) but works.

      What appears to be 'news' about the discovery mentioned above is that the equation is supposed to generate pictures related to 'natural' shapes. I don't really see it so much as being news, as many have noticed that most natural objects have a fractal dimension to them. Trees are the most obvious example. One of the fractals that Fractint will generate is a cool picture of a fern leaf. If you choose type=ifs, and fern for the IFS subtype, you should be able to display it.

      Someday, someone is going to find the correct fractal equation for the universe itself. It will probably be about 50 or so characters long. The physicists(sp?) of the world will look at that, then at the huge volumes they use to attempt to describe quantum mechanics, and say "Doh!"

      --
      This is an ex-parrot!
    2. Re:Real world? fractals by SuperGlue · · Score: 1

      My thoughts exactly...

      Hmm, he just now discovered fractals???

      I can still remember back in the days when I would spend countless hours watching a 386 render a fractal in Fractint.

      I would always show off all the cool (prerendered) images to my friends. The first thing that most people seemed to say is "kinda looks like a plant growing".....

      SuperGlueBooger

  14. Yeah so I made it up by Sevn · · Score: 1

    But I'm so fucking BORED!
    I wanted to see who would call bullshit first.

    --
    For every annoying gentoo user, are three even more annoying anti-gentoo crybabies. Take Yosh from #Gimp for example.
  15. stop the presses by g4dget · · Score: 5, Funny
    Belgian biologist discoveres mathematics

    After avoiding the subject for decades, a Belgian biologist discovers mathematics. One of the first areas he plays around with is "polar coordinates". "I never knew math could be this much fun", the biologist is quoted as saying. In his enthusiasm, the befuddled biologist decided to patent several formulas, following a recently fashionable trend of patenting the obvious.

  16. Additional prior art here by i_am_nitrogen · · Score: 1

    I was doing stuff like this on my TI-85 in 9th grade (5+ years ago). How the heck does this guy get a patent on something so obvious that an only moderately advanced 9th grader could figure it out? I'm sure lots of young students have tried varing the terms of various equations to see what happens. What's the patent number, and what exactly does he claim?

  17. Compression? by Associate · · Score: 1

    Could this possibly be applied to that story from the other day about the more something compresses the better the odds it was produced in nature? And would it still be the image of the object, or could the formula expressing it somehow be compressed? I would assume it would already be expressed in it's simplest form. Hell, what do I know? I count boxes.

    --
    Someone hates these cans.
  18. Homepage link by Elbelow · · Score: 1

    Homepage describing the discovery (which I am still a little skeptical about): Geniaal.be (translated: "brilliant.be")

    P.S.: I find it somewhat amusing that the fortune quote at the bottom of the SlashDot page I'm using to engter this happens to be

    "Confound these ancestors.... They've stolen our best ideas!" - Ben Jonson

    :-)

  19. More technical information by Elbelow · · Score: 3, Informative

    Besides the biologist's own homepage, there is also the Genicap homepage, featuring a link to a PDF whitepaper.
    It describes the superformula as a "generalized superellipse equation". The 3D version is based on superquadrics.

  20. +1 Funny [!TextBelow] by eugene+ts+wong · · Score: 1

    m

  21. My God! by superdoo · · Score: 0, Redundant

    He's discovered the Spirograph!

    1. Re:My God! by sigxcpu · · Score: 2, Funny

      A well spent week in the lab can easily save you two hours in the library.

      --
      As of Postgres v6.2, time travel is no longer supported.
  22. My favourite quote by SolemnDragon · · Score: 3, Interesting
    He specialises in Bamboo BioTechnical Rearch?

    But my favourite quote, from his homepage, is:

    "Moreover, well known equations from mathematics like the Theorem of Pythagoras, the equations for conics and conics sections and the equation from Fermat's last theorem, are all special cases of this formula."

    So... a guy who specialises in finding new ways to help bamboo propagate- and mind you, bamboo is pretty prolific on its own, don't let that 'lucky bamboo' (which is not actually bamboo, but a plant of another type entirely) fool you- has now found a new way to describe shapes. Yes, this is important, but it's not the next big thing. Folks have been trying to find ways to describe shapes by equations in images long before this, and while his rush to patent may cause some interesting snarls up ahead, i find it unlikely that he even understands Fermat's last theorem,

    Cubem autem in duos cubos, aut quadratoquadratum in duos quadratoquadratos, et generaliter nullam in infinitum ultra quadratum potestatem in duos eiusdem nominis fas est dividere.
    Cuius rei demonstrationem mirabilem sane detexi hanc marginis exiguitas non caparet.
    let alone knows the solution and has described it in shape-description formula format.

    But if he does, he'd better post something more mathematical on his website, because he's just landed himself into mathematician waters- and it's sink or swim there, buddy. You don't get to try it again next growing season (Andrew Wiles' revisions notwithstanding), and contrary to what laypeople tend to believe, they still require proof when you walk in and say something crazy like 'Pi is 3.' Even mathemeticians are still arguing over the proofs available. And it's pretty cutthroat, with ten-day conferences, so i bet he's in for some entertaining phone calls.

    1. Re:My favourite quote by Anonymous Coward · · Score: 1, Funny

      Yeah, you're right. Because he raises bamboo, he's an idiot with no insight who understands nothing. And you're so clever for discovering him! Imagine, actual mathematicians and science publishers fooled by the chicanery of this foul grass gradener, but you, lowly Slashdot karma whore, have discovered him for who he truly is.

      Well done!

    2. Re:My favourite quote by bill_mcgonigle · · Score: 1
      Obviously the parent poster was a mathematician.

      Here's how the saying goes:
      Biologists think they're Chemists.
      Chemists think they're Physicists.
      Physicists think they're Mathematicians.
      Mathematicians think they're God.
      --
      My God, it's Full of Source!
      OUTSIDE_IP=$(dig +short my.ip @outsideip.net)
  23. Don't be so condescending... by robbo · · Score: 3, Insightful

    I can decide which comment to reply to so I'll just top-level post. Yes, polar coordinate equations are quite simple, and yes, there is prior art for a variety of shape generating equations (for example, superquadrics)... That being said, the fact that this research has been published in Nature is indicative that his work has generated at least *some* excitement among mathematicians. Sometimes the most compelling mathematical constructs are also the simplest. e=mc^2 anyone?

    --
    So long, and thanks for all the Phish
  24. In related news... by freuddot · · Score: 1

    I've just invented a new universal theorem. It goes likes this :

    The theorem takes a natural value as parameter n, and n more parameters between 1 and 27. Then, you read out the theorem by replacing each parameter by a letter between 'a' and 'z', and space being 27.

    The really interesting point is that every known theorem, including Godel incompleteness theorem and general relativity are special cases of this theorem.

    Ok, I'll agree that writing out mathematical symbol is a bitch with it though. ;-)

  25. Think of it as copyrighting his shapes by jeblucas · · Score: 1

    He invented those shapes, nerds were tiling their bathrooms with them. I don't see why he shouldn't be able to gain royalties from commercial exploitation of his idea. Patenting vs copyrighting is immaterial--isn't he simply protecting intellectual property?

    --
    blarg.
  26. cool ... by Anonymous Coward · · Score: 0

    A superformula? He must be dividing and multiplying by 0! Damn him! He stole my formula!

    It all comes down to the value of 0, you see.

    And dividing by 0.

    And the interpretation of the infinities that will let Australia launch a rocket. And 0. It's all about 0.

  27. Apple II by greywire · · Score: 1

    I'm almost certain (this was like, over 15 years ago) that I discovered this same exact thing while experimenting with graphics on an apple II. Using sin and cos left something to be desired speed wise, so I used a completely integer algorithm I found in an issue of sync (the Sinclair magazine!). Then I tweeked it. I also was trying to do 3D, so I tried to make elipses and then elipses with perspective. Not knowing a thing about how 3D graphics were done, matrix equations, etc, I just messed around.

    I remember getting some really crazy spiro-graph like images just from a really simple formula.

    I'm sure I still have it on a 5.25" floppy, somewhere...

    --
    -- Senior Software Engineer, Attorney appearance services, locallawyerapp.com.
  28. PATENT?! by Anonymous Coward · · Score: 0

    Gielis has patented his discovery, and is developing computer software based on it.

    How the **** to you patent a formula?! That's the dumbest thing I've ever heard of! Hmmm, let's just patent something that describes a circle or a square.

    Obviously something's wrong with patent law.

  29. equation can be found here by solferino · · Score: 2, Informative


    the equation can be found here

    (link found on page with java demo linked to in parent comment - thanks!)

  30. Formula wanted by TerryAtWork · · Score: 1

    I have always wanted to know the formula for an egg shell...

    --
    It's Christmas everyday with BitTorrent.
  31. rewrite the oop books by Tablizer · · Score: 1

    This is going to ruin all those OOP textbook examples that show polymorphism on multiple shape sub-types. There is no longer multiple "types" of shapes, just parameters to a single shape equation :-P

  32. hamburger equation by Tablizer · · Score: 1

    Here is an old "hamburger drawer" G-BASIC program
    that uses a parametric equation to draw a
    hamburgers. The equation is basically:

    X = sin(tan(t))
    Y = cos(t)

    10 REM HAMBERGER DRAWER - VERSION 1
    PRINT " 1 - Hamberger"
    PRINT " 2 - Hogey "
    PRINT " 0 - quit"
    INPUT " Enter Choice:"; chc
    IF chc = 1 THEN fat = 170
    IF chc = 2 THEN fat = 80
    IF chc = 0 THEN GOTO 9999
    SCREEN 12
    CLS
    FOR T = 0 TO 6.32 STEP .0006 'define loop
    x = 300 + 230 * SIN(TAN(T)) 'calc x X = SIN(TAN(T))
    y = 225 + fat * COS(T) 'calc y Y = COS(T)
    PSET (x, y), 16 'plot point
    NEXT T
    GOTO 10
    9999 END

    1. Re:hamburger equation by E.+T.+Alveron · · Score: 1

      tasty!

  33. I did this 20 years ago on a ZX Spectrum by soundman32 · · Score: 1

    I seem to remember the circle command would erroniously take an extra parameter which would make these sort of shapes. Sort of like a Spirograph.

    --
    No sharp objects, I'm a programmer!
  34. Proof by Anonymous Coward · · Score: 0

    Does/Can he actually prove that it generates every shape? It's slashdotted already. Such a sweeping statement should be backed up by a rigorous mathematical proof otherwise it would be less misleading to say "It generates many useful shapes"

  35. not published in Nature by Anonymous Coward · · Score: 0

    The paper was not published in Nature. If it had been I doubt many ./'ers would have been able to understand it :) It ws actually published in the American Journal of Botany.

    The Nature connection is that it was reported in Nature Science Update, which is a science news service aimed at a general audience. NSU is owned by the same folks who own Nature, but editorially it's independent. It's basically an online science newswire. (I know, I work here -- hence anonymity)

    Also, at least in the UK, you can't patent a mathematical formula or algorithm