From: fractint-owner@xmission.com (fractint Digest) To: fractint-digest@xmission.com Subject: fractint Digest V1 #27 Reply-To: fractint@xmission.com Sender: fractint-owner@xmission.com Errors-To: fractint-owner@xmission.com Precedence: fractint Digest Friday, October 10 1997 Volume 01 : Number 027 In this issue: Re: (fractint) IFS Formulas (fractint) Removing integer math from Fractint? Wait a minute.... (fractint) dmj-pub.frm (fractint) Why? Re: (fractint) IFS Formulas (fractint) potpourii Re: (fractint) Re: (fractint) Integer v. float Re: (fractint) IFS Formulas Re: (fractint) IFS Formulas Re: (fractint) Integer v. float (fractint) today's fractal fortune Re: (fractint) potpourii (fractint) Books Re: (fractint) Re: Re: (fractint) potpourii (fractint) Friday(monday) Re: (fractint) Why? (fractint) XFRACT and making it work Re: (fractint) Integer v. float Re: (fractint) dmj-pub.frm Re: (fractint) IFS Formulas (fractint) Remove Int math ? Re: (fractint) Books See the end of the digest for information on subscribing to the fractint or fractint-digest mailing lists and on how to retrieve back issues. ---------------------------------------------------------------------- Date: 09 Oct 97 15:17:16 GMT From: wdelange@biochem.nl (Wim de Lange) Subject: Re: (fractint) IFS Formulas Op 8 Oct 97 om 12:48 schreef owner-fractint@xmission.com over: "(fractint) IFS Formulas" > Here is an example of a small utility (20k zipped) that I write for > fractint 19.6, for inverting the ifs attractors defined in the Very nice effects? Does the number of iterations play a role in it? > than 9 transformations, the program writes the formula and its Why 9? > comment will be greatly appreciated.. As I did. > ps. sorry for the bad english.. That I don't see. My native language is Dutch. > -------------------------------------------------------------------- Some questions about the par. > f2J { ; t=4 > type=formula formulafile=ifs.frm formulaname=f2_J > params=10000/0/0.004/2.375 float=y corners=-8/8/-1/11 > } What = t? Params = ??/??/?? What are these numbers in plain English? No MaxIter in the par file. Does this parameter plays a role in generating a nice image? What is in your opinion a good color file? I'm not good in generating good colorpalette's. Groetjes, Wim de Lange _____________________________________ Internet: wdelange@biochem.nl CompuServe: 100142,604 _____________________________________ - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Thu, 09 Oct 1997 16:55:34 +0200 From: Burger Subject: (fractint) Removing integer math from Fractint? Wait a minute.... ***this is a repost. third attempt, actually. havent got a clue what the problem is. my adress seems to be allright*** On the subject of removing integer code from Fractint, Tim Wegner wrote: > There are only two arguments I can think of against this. > > 1. There are still millions of older machines around the world > without FPUs. The most recent use the 486SX chips. > > (I think that is a weak argument as time goes by.) > > 2. Artists have a huge number of images that depend on artifacts of > integer math. > > There's no good answer to this except "keep your old copy of > Fractint". > Unless I have missed something, until now I haven't heard much comment on the second argument. One of my favorite images features this so called artifact. I have stored it in the first of the two parameterfile-entries that follow. I have stored the same image with option float=yes in the second entry. As you can see, float=yes or float=no makes quite a difference. (please read on after this parameter section) - -------8<------------------------------------ floatno { ; (c) 1997 Jacco.Burger@BU.TUDelft.nl reset=1730 type=formula formulafile=fractint.frm formulaname=richard1 passes=1 float=n corners=-0.81683618/-0.55938143/0.797761261/0.68775022/-0.67134571/0.603\ 740633 maxiter=900 inside=0 logmap=yes potential=255/350/500 colors=222C6E<44>KRILSJMTI<14>FCBEAAEBA<12>MRLNSMOUNPVORWQ<12>lmknomnnl<\ 29>R3C<14>LJFKLGLMH<13>ecYge_ge_<13>gdVhcUgbT<13>JBFH9DHAD<13>TQQUSRVSR<\ 13>nURpVSpVS<13>e_Sd`Td`TdaT<10>ahUC5EC5EC5E } floatyes { ; (c) 1997 Jacco.Burger@BU.TUDelft.nl reset=1730 type=formula formulafile=fractint.frm formulaname=richard1 passes=1 corners=-0.81683842/-0.55938598/0.797753176/0.687746147/-0.67134795/0.60\ 3736559 float=y maxiter=900 inside=0 logmap=yes potential=255/350/500 colors=222C6E<42>KQIKRIKRILSJMTIMSI<13>FCBEAAEBA<11>LQKMRLNSMOUNPVO<13>l\ mknomnnl<29>R3C<12>MHFLIFLJFKLGLMHNNI<10>b`WdbXecYge_ge_<13>gdVhcUgbT<13\ >JBFH9DHAD<13>TQQUSRVSR<13>nURpVSpVS<13>e_Sd`Td`TdaT<10>ahUC5EC5EC5E } - ---------8<------------------------------------ Now I really don't mean to urge the developers of Fractint to keep integer math, join the Integerology Church and set fire to all PC's with 32-bit software (the old XT's and AT's with their 5'25 floppy drives probably burn better anyway). I think that if removing integer math stimulates the development of Fractint, then please do so! Just to compare, think about the development of wordprocessors. Some of you might remember Wordstar, a wordprocessor of the 80's, or the early versions of WordPerfect . Compare this to recent Window-versions of MS-Word or WordPerfect for Windows and it's like comparing the Mayflower to the Spaceshuttle. And the Spaceshuttle doesn't have sails, does it? So if it is possible to do the same kind of development with Fractint, and if this involves removing the sails of integer math, then I guess it should be done. Fractint is a wonderful program as it is, but there are so many wonderful new ideas to implement. BUT what about my poor fractals that have that integer-artifact?? With all respect, there is something about Tim's suggestion I don't like (keeping an old version of Fractint available for yourself in case you want to regenerate one of those silly old images). For example, in a future release there may be a coloring option that I want to apply on a image that has the integer-artifact. If the integer-math would have been removed, that wouldn't be possible. So here is my suggestion, at the risk of making a fool of myself because I don't know xxx about integer- and floating-point math, not to mention 32-bit software development. If somebody can find out what exactly causes the integer-artifact effect, would it be possible to simulate this effect in floating-point math and introduce this as (let's say) an outside=intmath option? Now, wouldn't that be a challenge for the real programmer!!?? This morning in the TV-news I saw a robot dancing the mambo, so if programmers can do that, then I am sure that for you guys simulating the effect of integer-math by using floating point math is a piece of cake....:-D adios, do widzenia, houdoe, bye! Jacco - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Thu, 9 Oct 1997 17:22:31 -0400 From: Les St Clair Subject: (fractint) dmj-pub.frm Hi Damien, >>Just wanted to let everyone know that an update version of my FRM for n= ew coloring methods has been placed on my web site.<< Good grief!! How long did it take for you to work that little lot out? >>I have also included a PAR file that makes getting started with these formulae easier.<< Your examples are absolutely stunning. = Thanks for sharing your work. cheers, Les St Clair - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Thu, 9 Oct 1997 19:40:49 -0500 From: newstedclan@juno.com Subject: (fractint) Why? I have a question (again) :|> Why do you use, mess with, manipulate, study, or whatever with fractals and fractint? Personally, I find them to be uncannily (real word?) natural. And lately I've been reviving my math to use it to write some rudimentary farctals of my own. But what about you people out there in Mandel land? "...God is in the details..." Linus C. Pauling Nuke - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Thu, 9 Oct 1997 19:44:37 +0500 (GMT) From: Ramiro Perez Subject: Re: (fractint) IFS Formulas On 9 Oct 1997, Wim de Lange wrote: > "(fractint) IFS Formulas" > > > Here is an example of a small utility (20k zipped) that I write for > > fractint 19.6, for inverting the ifs attractors defined in the > > Very nice effects? Does the number of iterations play a role in it? Yes, because since they are inverse to the ifs attractors, sometimes you need more than 150 iterations to get a good image.. > > than 9 transformations, the program writes the formula and its > > Why 9? In fact 8, because more IFS transformations, larger the formula definition, and I think that fractint don't support definitions that where too large (by the way, can anyone say to me what is the limit?).. > Some questions about the par. > > What = t? Params = ??/??/?? What are these numbers in plain English? > No MaxIter in the par file. Does this parameter plays a role in > generating a nice image? What is in your opinion a good color file? > I'm not good in generating good colorpalette's. Ok, there is no maxiter nor a color definition because I prefer to leave it to the control of the user.. In the case of the t=4; that means the number of transformations, for example the Fern has 4. In the case of the Params, the first number is the bailout number,next one, nothing, and the last two are the julia-like constant for those fractals, (Yes, they are julia sets..). A better explanation is in the readme.txt that is with the program... For the colors, I noticed that these fractals needs color maps with small gradations, because in most of them the orbit tends to escape very fast.. That is why I use a bailout so large (10000!) After some manipulations to the fractals produced by my program, you can end with something interesting, for example: - -------------------------------------------------------------------------- fernJ{ ; t=4 reset=1960 type=formula formulafile=fern.par formulaname=fern_J passes=1 corners=-8/8/-1/11 params=10000/0/0.32/7.15 float=y maxiter=255 inside=255 colors=000<16>000010030<37>0x00z00z0<195>zzz } frm:fern_J{ a0=0.01000,d0=0.16000, a1=0.85000,b1=0.04000,c1=-0.04000,d1=0.85000, a2=0.20000,b2=-0.26000,c2=0.23000,d2=0.22000, a3=-0.15000,b3=0.28000,c3=0.26000,d3=0.24000, al0=0.00160, al1=0.72410,k1=0.06400,l1=-1.36000, al2=0.10380,k2=-0.41600,l2=-0.32000, al3=-0.10880,k3=0.12320,l3=0.06600, z=pixel: x=real(z) y=imag(z) o0=(d0*x)/al0+flip((a0*y)/al0) op0=|o0-p2| o1=(d1*x-b1*y+k1)/al1+flip((-c1*x+a1*y+l1)/al1) op1=|o1-p2| o2=(d2*x-b2*y+k2)/al2+flip((-c2*x+a2*y+l2)/al2) op2=|o2-p2| o3=(d3*x-b3*y+k3)/al3+flip((-c3*x+a3*y+l3)/al3) op3=|o3-p2| IF (op000k00m01m<29>0ky0mz1mz<30>zzz<46>2zz0zz0yz<45>02z00z00y\ <59>002000000 } - ---------------------------------------------------------------------------- Suerte! Ramiro Perez - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Thu, 09 Oct 1997 19:42:56 -0500 From: "Justin A. Kolodziej" <4wg7kolodzie@vms.csd.mu.edu> Subject: (fractint) potpourii Just a few comments on a few subjects, mostly because I feel too lazy to reply to the different threads ;): 1. Maybe there is a place for integer math in Fractint. It certainly has its supporters, as you all can see. I hereby amend my wish list post to read as follows: Instead of "no more integer math," how about "floating point math as default?" This would satisfy the traditionalists, while the rest of us who prefer float = yes get it automatically! I know you can edit the SSTOOLS.INI file to get it automatically, but I said I was lazy, remember? 2. Where do I get DJGPP?????? 3. What's with the quat orbit in the julibrot type? When I try to run it from, let's say, cj=-1 to cj=1, I get a sphere! This can't be right because when I check the regular quat type between those two extremes, the results certainly are NOT circles! What's going on here? Is it my fault or Fractint's? 4. Try this: it's a generalized Nuke1: SuperNuker {;Justin Kolodziej ;mod. of Mr. Newstead's Nuke1 z = 0 c = pixel d = fn2(pixel): z = (fn1(z)+c)/d } Justin Kolodziej "I only use Windows because: 1. Solaris doesn't run on PCs :( 2. I can't afford an Ultra SparcStation 3 :( :*( :-( 3. When's the last time YOU saw an X-Windows app in your local software store?! ;)" - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Thu, 09 Oct 1997 22:30:06 -0700 From: Peter Jakubowicz Subject: Re: (fractint) Re: > Very simple! Thanks kindly, Linda. It works, of course. I may try to post some formulas soon, but can anyone tell me if there is some index of .frm files somewhere, so I can check to see if I am merely reinventing someone else's? Also, I am considering plunking down $50 at my local bookstore for a copy of The Science of Fractal Images, which I think I have seen referred to here a few times. Is this a good book? I am trying to learn more, more, more of the technical stuff and am looking for lots of math formulas to play with. Perhaps something has been written since that is better? Any help wld be appreciated. Peter > > ------------------------------------------------------------ > Thanks for using Fractint, The Fractals and Fractint Discussion List > Post Message: fractint@xmission.com > Get Commands: majordomo@xmission.com "help" > Administrator: twegner@phoenix.net > Unsubscribe: majordomo@xmission.com "unsubscribe fractint" - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 00:46:47 -0400 (EDT) From: Evin C Robertson Subject: (fractint) Integer v. float Well, I say keep the integer math. Despite what some people have said, integer math is, in general, faster than floating point, with a few exceptions. On the regular pentium and pentium MMX, floating point multiplication is faster than integer multiplication. On everything else (P-pro, PII, K6, each better than the regular pentium and pentium MMX), integer multiplication is faster than floating point. The problem Fractint has now with integer math is that it's running in 16-bit mode, so every 32 bit operation requires prefixes which can slow things down. Just porting fractint to 32 bits and keeping the integer math would speed it up. DJGPP and NASM, please... - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: 10 Oct 97 08:08:27 GMT From: wdelange@biochem.nl (Wim de Lange) Subject: Re: (fractint) IFS Formulas Op 9 Oct 97 om 19:44 schreef owner-fractint@xmission.com over: "Re: (fractint) IFS Formulas" > Yes, because since they are inverse to the ifs attractors, sometimes > you need more than 150 iterations to get a good image.. Ah, in that case I' m going to edit the par file the program generates. I'm using PARTOBAT for automatically generating the pictures. > In fact 8, because more IFS transformations, larger the formula > definition, and I think that fractint don't support definitions that > where too large (by the way, can anyone say to me what is the > limit?).. So if this limit is higher than you expect, you are gonna to rewrite the program :-) > Ok, there is no maxiter nor a color definition because I prefer to > leave it to the control of the user.. In the case of the t=4; that Ok. that means I must do the work myself ;-) Oh well, that is the fun to fractint. Isn't it? > means the number of transformations, for example the Fern has 4. In I thought so, but I was not sure. > For the colors, I noticed that these fractals needs color maps with > small gradations, because in most of them the orbit tends to escape > very fast.. That is why I use a bailout so large (10000!) I get it. I've read the readme file now (I don't normally do that :-). And much is clearer now. Groetjes, Wim de Lange _____________________________________ Internet: wdelange@biochem.nl CompuServe: 100142,604 _____________________________________ - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 07:44:16 -0400 From: George Martin <76440.1143@compuserve.com> Subject: Re: (fractint) IFS Formulas Ramiro Perez wrote: > In fact 8, because more IFS transformations, larger the formula definition, and I think that fractint don't support definitions that where too large (by the way, can anyone say to me what is the limit?).. < Right now, a formula's text is limited to 8192 characters (not including white space and comments), and by the memory available to store the various functions and pointers to actually run the formula. The amount of memory used by a formula can be seen in the CTRL-TAB screen (while the image is drawing, hit TAB, and then CTRL-TAB for lots of information about what is going on inside fractint at the time). One of the projects for the next version of fractint is to make more efficient use of memory in the formula parser, which should result in much larger formulas being possible. George Martin - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 07:49:35 -0400 (EDT) From: ijk@sas.upenn.edu (Ian J Kaplan) Subject: Re: (fractint) Integer v. float Evin C Robertson wrote: > > Well, I say keep the integer math. Despite what some people have said, > integer math is, in general, faster than floating point, with a few > exceptions. On the regular pentium and pentium MMX, floating point > multiplication is faster than integer multiplication. On everything > else (P-pro, PII, K6, each better than the regular pentium and pentium > MMX), integer multiplication is faster than floating point. The problem [snip] The question is, how big a speed difference are we talking about? because the advantages of moving to floating point code, in terms of shrinking the code and getting into a compile-anywhere situation, are considerable... Actually, we can measure this, can't we? Would people with non-pentium chips of all kinds care to submit some sample times with float=no and float=yes? - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 09:39:55 -0300 (ADT) From: Michael C Taylor Subject: (fractint) today's fractal fortune No plain fanfold paper could hold that fractal Puff -- He grew so fast no plotting pack could shrink him far enough. Compiles and simulations grew so quickly tame And swapped out all their data space when Puff pushed his stack frame. (refrain) Puff, he grew so quickly, while others moved like snails And mini-Puffs would perch themselves on his gigantic tail. All the student hackers loved that fractal Puff But DCS did not like Puff, and finally said, "Enough!" (refrain) Puff used more resources than DCS could spare. The operator killed Puff's job -- he didn't seem to care. A gloom fell on the hackers; it seemed to be the end, But Puff trapped the exception, and grew from naught again! (refrain) Refrain: Puff the fractal dragon was written in C, And frolicked while processes switched in mainframe memory. Puff the fractal dragon was written in C, And frolicked while processes switched in mainframe memory. - -- Michael C. Taylor Programmer, Computing Services, Mount Allison University, Canada sci.fractals FAQ fractal and cryptography archive - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 07:58:34 -0500 From: leenewsted@juno.com (Merle L Newsted Jr) Subject: Re: (fractint) potpourii > Where do I get DJGPP?????? Yeah! Where do I get DJGPP? And what hte heck does it stand for??? >3. What's with the quat orbit in the julibrot type? When I try to >run >it from, let's say, cj=-1 to cj=1, I get a sphere! This can't be right >because when I check the regular quat type between those two extremes, >the results certainly are NOT circles! What's going on here? Is it >my >fault or Fractint's? Hunh? >4. Try this: it's a generalized Nuke1: >SuperNuker {;Justin Kolodziej >;mod. of Mr. Newstead's Nuke1 >z = 0 >c = pixel >d = fn2(pixel): > z = (fn1(z)+c)/d >} Thanks!, I just discovered the fn1 option the other day, It's the sort of thing I've been looking for so I can write a general form and play with it.(Remember I'm a beginner (:{() P.S. My name has no "A" in it. it's Newsted. Am I picky or what? Thanks again, Merel L. Newsted Jr. (Nuke) >Justin Kolodziej > >"I only use Windows because: >1. Solaris doesn't run on PCs :( >2. I can't afford an Ultra SparcStation 3 :( :*( :-( >3. When's the last time YOU saw an X-Windows app in your local >software >store?! ;)" > > > > >------------------------------------------------------------ >Thanks for using Fractint, The Fractals and Fractint Discussion List >Post Message: fractint@xmission.com >Get Commands: majordomo@xmission.com "help" >Administrator: twegner@phoenix.net >Unsubscribe: majordomo@xmission.com "unsubscribe fractint" > - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 07:58:23 -0500 From: leenewsted@juno.com (Merle L Newsted Jr) Subject: (fractint) Books Peter, Have you seen Mandelbrot's "The fractal geometry of Nature" ? (or somethinglike that) I thinks it's out of print, but you might be supprised what you can find at a used bookstore. Nuke - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 10:05:51 -0300 (ADT) From: Michael C Taylor Subject: Re: (fractint) Re: On Thu, 9 Oct 1997, Peter Jakubowicz wrote: > copy of The Science of Fractal Images, which I think I have seen > referred to here a few times. Is this a good book? I am trying to learn > more, more, more of the technical stuff and am looking for lots of math The Science of Fractal Images is a "technical coffee table" book. Great for us mathematical types to leave lying around our houses, so guests can say, "I cannot belief that little equation generates That!" It is a very nice book, I picked up a copy and was quite impressed with it. Depends on what sort of mathematical knowledge you seek, if you want to begin at the beginning, it isn't the right place. G.A. Edgar's _Measure, Topology, and Fractal Geometry" or Barnsley's _Fractals Everywhere_. Both are aimed at the 3-5 year Physics, Math, CS, or Engineering undergrad student. If you don't fit in that category, Devaney's _Chaos, Fractals, and Dynamics_ might be a better place to start. - -- Michael C. Taylor Programmer, Computing Services, Mount Allison University, Canada sci.fractals FAQ fractal and cryptography archive - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 10:15:07 -0300 (ADT) From: Michael C Taylor Subject: Re: (fractint) potpourii On Fri, 10 Oct 1997, Merle L Newsted Jr wrote: > > Where do I get DJGPP?????? > > Yeah! Where do I get DJGPP? And what hte heck does it stand for??? DJGPP is a port of the GNU C/C++ gcc compiler to DOS. It was ported by DJ, and you cannot have ++ in a DOS name, hence DJGPP. DJGPP is freely available from http://www.delorie.com/ for documents and pointers to the actual files. It is intended primaryly for experienced (UNIX) programmers, not necessary for the faint of heart. It is not fractal software! (I'll save your several MBs of downloading...) - -- Michael C. Taylor Programmer, Computing Services, Mount Allison University, Canada sci.fractals FAQ fractal and cryptography archive - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 09:02:39 -0500 From: leenewsted@juno.com (Merle L Newsted Jr) Subject: (fractint) Friday(monday) Ever have one of those days when you correct someone's misspelling of your last name , AND THEN you misspell your own FIRST name in the message?! I'm MERLE not MEREL, and a big dunce too! signed, and spell checked, MERLE L. NEWSTED JR. (Nuke) - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 08:38:30 -0600 (MDT) From: Jason Hine Subject: Re: (fractint) Why? Nuke, Why not?.... ;) I suppose everyone has different reasons for being interested in fractals; perhaps some of us are in it for the artistic qualities they have, others for the bizarre (and therefor often 'natural') mathematical correlations that can be found in them, and still others (I'm in this flow) percieve analogies between fractal concepts and long-held beliefs in subjects like science and religion. Certainly we are all fascinated by fractals, and this fascination urges us to find applications and relevancies between fractals and our world. If you browse through some of the recent issues of _Science_, you can find examples of applied fractal theory, and even recognize fractal concepts hidden in articles where the author might not have even heard of fractals! Another reason some of us are into these things is that it is a fairly new field, and there is much room for discovery... it's easier to be on the 'cutting edge' of fractology (?!) than it is to be on the cutting edge of, say, molecular biology. Hope I haven't spoken too much for anyone/everyone else; I'd be interested in reading other folk's answers to Nuke's question. Spidey - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 97 15:51:23 BST From: r.hopkins@ic.ac.uk Subject: (fractint) XFRACT and making it work Recently I posted about having trouble making xfract work. This has now been fixed. It was necessary to add - -DBIG_ANSI_C to the $(DEFINES) in the makefile I don't know if this was because the Makefile was broken, or because the uni's unix was duffed up. Any case, adding that fixed it. I am runing Solaris, and am using the latest XFRACT from the fractint webpages (version 3.04?) Hope this helps at someone other than me, Hoppy - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 11:05:43 -0400 From: nick.grasso@hrads.com (Grasso, Nick) Subject: Re: (fractint) Integer v. float > The question is, how big a speed difference are we talking about? >because the advantages of moving to floating point code, in terms of >shrinking the code and getting into a compile-anywhere situation, are >considerable... Actually, we can measure this, can't we? Would people >with non-pentium chips of all kinds care to submit some sample times with >float=no and float=yes? In regard to the float vs. integer discussion, I would like to see the integer code removed from fractint and have it ported to DJGPP. Although I don't have any benchmarks, on my old 486-33 there was no significant difference in speed between float and integer. I think the best arguement for keeping integer is that many artists rely on integer artifacts. However, as Tim has said, they can always keep an older version around. Also, wasn't there an attempt at duplicating these integer artifacts in the formula parser? Isn't this what floor and ceil are supposed to do? How well does this work? Nick nick.grasso@hrads.com - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Thu, 09 Oct 1997 23:54:43 -0400 From: "Damien M. Jones" Subject: Re: (fractint) dmj-pub.frm Les, - Good grief!! How long did it take for you to work that little lot out? Actually, not that long. A lot of it is cut-and-paste, else I never would have managed to write 100 fully-commented formulae. :) You'll notice the PAR file is far less commented. Damien M. Jones / temporary sanity designs / http://www.emi.net/~dmj/ dmj@emi.net / my gallery: http://www.geocities.com/SoHo/Lofts/2605/ - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 08:47:05 -0400 From: wdecker@csc.com Subject: Re: (fractint) IFS Formulas It's nice to see some IFS discussion going on. I'd like to let you know of another IFS 'utility' for fractint that I've been working on. It's a Windows screensaver that has the ability to create text for a fractint par file based on its current IFS image. I recently added a 'mutate' ability that lets the viewer see what happens as the transformation set changes. If you run on a Windows system and you're interested, take a look at http://www.geocities.com/SoHo/Studios/1450 where you can download the saver and a set of par formlulae for some interesting images it generated. Because of the coloring scheme I use to translate the saver images to fractint, you'll find that the minimum number of transforms is 12 :'( Bill Decker >Hello > >Here is an example of a small utility (20k zipped) that I write for >fractint 19.6, for inverting the ifs attractors defined in the fractint >ifs files, and rewritting it for fractint formula types and for fractint >par files. It takes a fractint ifs file, scan it, then if there is an ifs >definition, and if it isn't 3D ifs and has less than 9 transformations, >the program writes the formula and its correspondient par file.. >The program is in my web pages, in the gallery section, but if you wish to >go directly, here is the address: >http://www.utp.ac.pa/~rperez/ifsinv.html >By the way, this program is a new release of an old one that I have for >the same work, but this one if far more simpler and this time the program >optimizes the formulas, so it runs faster than the old one.. >Any comment will be greatly appreciated.. > > > Ramiro Perez > - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 14:00:54 -0400 From: Sylvie Gallet Subject: (fractint) Remove Int math ? Hi Thierry, >> And I'm working on a long term project with this formula : >> >> ----------------------------------------------------------- >> frm:rand_generic { ; **** PARAMETER 1 MUST BE > 0 **** >> ; Thierry Boudet 101355.2112ompuserve.com >> ; 19 Juillet 1997 >> z =3D rand: >> z =3D fn1(z) + fn2(pixel); >> |z| <=3D real(p1) >> } >> ----------------------------------------------------------- >> >> who works very fine (for me :-) in integer mode, but is completly >> broken in float mode... The following formula works with float=3Dyes: frm:rand_generic { ; **** PARAMETER 1 MUST BE > 0 **** ; Thierry Boudet 101355.2112ompuserve.com ; 19 Juillet 1997 z =3D srand(z): z =3D fn1(z) + fn2(pixel); |z| <=3D real(p1) } Cheers, - Sylvie - ---------------------------------------------------------------------- Sylvie_Gallet@CompuServe.com http://spanky.triumf.ca/www/fractint/sylvie/gallet.html http://ourworld.compuserve.com/homepages/Sylvie_Gallet/homepage.htm - ---------------------------------------------------------------------- - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ Date: Fri, 10 Oct 1997 19:10:55 -0700 From: "Felix (Jason) Bunke" Subject: Re: (fractint) Books Merle L Newsted Jr wrote: > > Peter, > Have you seen Mandelbrot's "The fractal geometry of Nature" ? (or > somethinglike that) I thinks it's out of print, but you might be > supprised what you can find at a used bookstore. > > Nuke > > ------------------------------------------------------------ > Thanks for using Fractint, The Fractals and Fractint Discussion List > Post Message: fractint@xmission.com > Get Commands: majordomo@xmission.com "help" > Administrator: twegner@phoenix.net > Unsubscribe: majordomo@xmission.com "unsubscribe fractint" Yes, it is still available. www.amazon.com has it for only $28. I've ordered from them before, and i would wholeheartedly recommend their services. It's always interesting to go back to the source and learn directly from "Big Poppa" Mandelbrot! By the way, this is my first posting. I'm a new graduate student at the mathematics dept. of the Georgia Institute of Technology, and you guys have definitely kept my new account very busy! For a very thorough, rigorous and technical book on the mathematical theory behind fractal geometry, Kenneth Falconer's book "Fractal Geometry: Mathematical Foundations and Applications" is probably the most complete and best-written book of that sort that I have found so far. By the way, I'm looking at possibly concentrating in dynamical systems, fractals and the like during my studies, which is what led me to Georgia Tech -- the home of the Center for Dynamical Systems and Nonlinear Studies and the former stomping grounds of Michael Barnsley, whose book "Fractals Everywhere" is actually used in a course I may try to take next quarter. Happy bookhunting! Plus, I agree with the comment on used bookstores -- I've found some real gems at those places! - -- Felix Bunke (bunke@resnet.gatech.edu) (Sorry, I haven't learned yet how to put links in my e-mail -- I haven't had it for very long!) - ------------------------------------------------------------ Thanks for using Fractint, The Fractals and Fractint Discussion List Post Message: fractint@xmission.com Get Commands: majordomo@xmission.com "help" Administrator: twegner@phoenix.net Unsubscribe: majordomo@xmission.com "unsubscribe fractint" ------------------------------ End of fractint Digest V1 #27 ***************************** To subscribe to fractint Digest, send the command: subscribe fractint-digest in the body of a message to "majordomo@xmission.com". 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