Re: 2-D Gradients
On Fri, Dec 08, 2000 at 07:49:38AM -0500, "Garry R. Osgood" <[EMAIL PROTECTED]> wrote: > > What is the Red Book? Where can I find it? What is its ISBN? > > PostScript(r) Language Reference by Adobe Systems Incorporated > Paperback - 912 pages 3rd edition Bk & cdr edition (February 26, 1999) > Addison-Wesley Pub Co; ISBN: 0201379228 Download it here: http://partners.adobe.com/asn/developer/technotes.html ;) -- -==- | ==-- _ | ---==---(_)__ __ __ Marc Lehmann +-- --==---/ / _ \/ // /\ \/ / [EMAIL PROTECTED] |e| -=/_/_//_/\_,_/ /_/\_\ XX11-RIPE --+ The choice of a GNU generation | |
Re: 2-D Gradients
On Fri, Dec 08, 2000 at 07:49:38AM -0500, Garry R. Osgood wrote: > > What is the Red Book? Where can I find it? What is its ISBN? > > PostScript(r) Language Reference by Adobe Systems Incorporated > Paperback - 912 pages 3rd edition Bk & cdr edition (February 26, 1999) > Addison-Wesley Pub Co; ISBN: 0201379228 It's also available online as a 7Mb PDF file on: http://www.adobe.com/print/postscript/pdfs/PLRM.pdf Jerome.
Re: 2-D Gradients
Shlomi Fish wrote: > On Thu, 7 Dec 2000, Federico Mena Quintero wrote: > > > You want PostScript-like tensor gradients. The new edition of the Red > > Book describes them nicely. > > > > What is the Red Book? Where can I find it? What is its ISBN? PostScript(r) Language Reference by Adobe Systems Incorporated Paperback - 912 pages 3rd edition Bk & cdr edition (February 26, 1999) Addison-Wesley Pub Co; ISBN: 0201379228 The "Red Book" is the PostScript bible. (comparable to the "Camel Book" of Perl programmers, but not as much fun to read;) The first edition of this book had a bright red color; it was accompanied by a design book (green cover) and a user's guide (blue cover). Be good, be well Garry
Re: 2-D Gradients
On Thu, 7 Dec 2000, Federico Mena Quintero wrote: > Shlomi Fish <[EMAIL PROTECTED]> writes: > > > If anybody is familiar with the Gimp's gradient editting capabilities then > > he is probably familiar with the state-of-the-art one dimensional (1-D) > > gradient editting. My problem is that it's only one dimensional and does > > not allow you to edit a gradient in a plane. > > > > Does anybody know of any methodologies and algorithms for creating a > > two-dimensional gradient editting. I.e: I will be able to define points > > and shapes on the plane with colors that correspond to those handles, and > > then use blending methods between them, so that I'll eventually have a > > gradient that spreads across the 2-D plane. > > You want PostScript-like tensor gradients. The new edition of the Red > Book describes them nicely. > What is the Red Book? Where can I find it? What is its ISBN? Regards, Shlomi Fish > Federico > -- Shlomi Fish[EMAIL PROTECTED] Home Page: http://t2.technion.ac.il/~shlomif/ Home E-mail: [EMAIL PROTECTED] The prefix "God Said" has the extraordinary logical property of converting any statement that follows it into a true one.
Re: 2-D Gradients
Shlomi Fish <[EMAIL PROTECTED]> writes: > If anybody is familiar with the Gimp's gradient editting capabilities then > he is probably familiar with the state-of-the-art one dimensional (1-D) > gradient editting. My problem is that it's only one dimensional and does > not allow you to edit a gradient in a plane. > > Does anybody know of any methodologies and algorithms for creating a > two-dimensional gradient editting. I.e: I will be able to define points > and shapes on the plane with colors that correspond to those handles, and > then use blending methods between them, so that I'll eventually have a > gradient that spreads across the 2-D plane. You want PostScript-like tensor gradients. The new edition of the Red Book describes them nicely. Federico
Re: 2-D Gradients
Shlomi; On Wed, Dec 06, 2000 at 11:21:36AM +0200, Shlomi Fish wrote: > If anybody is familiar with the Gimp's gradient editting > capabilities then he is probably familiar with the state-of-the-art > one dimensional (1-D) gradient editting. My problem is that it's > only one dimensional and does not allow you to edit a gradient in a > plane. > > Does anybody know of any methodologies and algorithms for creating a > two-dimensional gradient editting. I.e: I will be able to define > points and shapes on the plane with colors that correspond to those > handles, and then use blending methods between them, so that I'll > eventually have a gradient that spreads across the 2-D plane. > > The question is: how do I do it? > > So, if anybody can enlighten me or point to a reference or link > about it, please do. I recommend that you look at swirl.c in xscreensaver: http://www.jwz.org/xscreensaver/ It makes nice swirly patterns based on the distance/angle of each pixel from a random set of points. Shouldn't be to hard to add lines/shapes to the algorithm as there are plenty of good closest-point-on-shape algorithms out there. An editor for this sort of gradient, attached to GIMP gradients and all other GIMP goodness, would be great fun. Cheers, Tom -- -- Tom Rathborne [EMAIL PROTECTED] http://www.aceldama.com/~tomr/ -- "It's Like A Warzone, Deep Inside Of Me / When My Mind Becomes My Enemy" -- -- Praga Khan, "My Mind Is My Enemy"
