--- In [email protected], "ddailey" <[EMAIL PROTECTED]> wrote: > > Hello, Andrew, > > I remember you writing on this list some years ago, on the subject of alternatives to gradient fills. > > I was able to find this message http://tech.groups.yahoo.com/group/svg-developers/message/54827 from you, but I remember an earlier message concerning the decomposition of gradients into piecewise linear or gradients segments. You compared it as I recall to being like representing curves as a series of small lines. I was working on some similar stuff with piecewise decompositions of richer gradients at the time. > > More complex gradients such as you illustrate and non-affine distortions such as allowed by the edit-transform-distort option in Photoshop are exactly the sorts of things that would make morphing from one image to another progress more naturally. The mesh gradient and the mesh distortion (such as allowed in both Illustrator and in Photoshop's "liquify" filter) seem to have similar underlying mathematics, and as Erik Dahlström pointed out recently, the topic is introduced a bit at Wikipedia: http://en.wikipedia.org/wiki/Texture_mapping . I gather what you are doing is a bit different than this however? I could not intuit much of the math from what you wrote on your web sites. > > Does anyone know if the techniques in use in Photoshop or Ilustrator are covered by extant patents? > > Thanks for sharing your work here, Andrew. > > David >
Hi. Yeah, I sent similar info twice (or thrice, I do not remember). I hoped find some boys, who have an interest in modern methods. As a result I has to use this technique only for my purpose (edit raster or create images from zero level). I found some painters, who was interested and now test my PaintingTool. Course, I started to evolve advanced gradient fills because I hadn't found something similar in common progs for image processing. It was in 1982, when I got a task concerned with 2D interpolation and realized finally, how it should be done. Later I found one program package, written in 1975, where I found similar method. I cannot tell you, that I know well the whole list of patents, but I found some of them, seeking in Google for articles on gradient fills. As I could able to notice, all of them describe contour (stright lines or curves, no matter) based methods. I need no curves. Only set of control points. I fact, method, used in Warper, differs from one used in PaintingTool or SVSViewer. Similar, but not the same. As I wrote, theory of elasticity. There is a whole list of potential useful application, what I cannot realize without support of some big boys- owners of vector file formats. I do think, that creation of a new one isn't the best idea (But I did it in fact! Download SVSViewer and open some of svs files with any text editor), but some kind of additional records for SVG for example is a must. Such a method coul be used in browsers. Well, after my first letter to svg-developers I had a contact with Peter Sorotokin from Adobe. He refused to play my prog, because it, as he thought, could content some harmful code. Well, if this boy is so poor and has no old comp for such sort of experiments, I offerd him source code (!!!) but after it contact was broken. Well, try to play (if you haven't done it until now) with my progs. Hope, it will be interesting. Regards, A ----- To unsubscribe send a message to: [EMAIL PROTECTED] -or- visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" ---- Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/svg-developers/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/svg-developers/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
