Thanks for the link, Jan, to this working draft. Of the technologies listed, I see one oversight that addresses all of the requirements: <replicate> [1],[2].
As demonstrated in the suite of accompanying examples, <replicate> enables a. pseudo 3D b. artistic effects c. Compact representation d. Ease of authoring (the metaphor is based on <animate>, already a part of SVG) e. Compact syntax f. Hand authoring g. Compatibility with SVG gradient syntax h. Control of the spread of color and transparency values Additionally, <replicate> enables certain classes of non-rectilinear tilings, perspective transforms, and, in conjunction with filters expresses certain naturalistic scenes quite conveniently [3]. It also provides considerable potential for integration with multivariate data streams as suggested from InkML [4] I would suggest that it be added to the candidate technologies being considered. Its utility is slightly more in the "3D direction" and less in the "gradient direction" than the other technologies in the advanced gradient requirements draft, but its expressive power is greater than the others. I can see it complementing the power of some of the others. For any drawn object (and possibly other items as well, like gradient-stops), subsets of its attributes and all the attributes of its modifiers (gradients, filters, patterns, clippaths, masks and animates) may be modified linearly or curvilinearly as the object is morphed over two-D. The module for multivariate curvilinear interpolation is patterned upon, but more powerful than the interpolation module in <animate> and offers obvious suggestions for desired extensions of the <animate> module (the ability to change animated values according to any user-defined 2D path). I believe the WG had informally decided that <replicate>, being already implemented in JavaScript, didn't need native browser support, but the JavaScript implementation, in the case of more complex effects is very slow and would benefit from lower-level implementation. The majority of the user-demanded effects enabled by replicate CANNOT currently be managed within current SVG without script! Given the broad array of important use cases that it addresses, both within and outside the Advanced Gradients area, <replicate> offers a powerful extension to SVG's arsenal, with many suggestions for syntactic representation having already been examined and explored in detail. Since browsers that fully support SVG1.1 will already have the code to support <animate>, and since <replicate> borrows extensively from that syntax (sharing the interpolation module) implementation is likely to be less costly than it would be for other less powerful methodologies. It would extend SVG immensely in several directions, allow greater integration with multivariate data streams, and do so using syntax that is already familiar to SVG authors. Respectfully, David [1] http://srufaculty.sru.edu/david.dailey/svg/SVGOpen2010/replicate.htm [2] http://svgopen.org/2010/papers/46-A_proposal_for_adding_declarative_drawing_ to_SVG/index.html [3] http://srufaculty.sru.edu/david.dailey/svg/replicate/repPathTurb2.svg (Opera or ASV needed) [4] http://lists.w3.org/Archives/Public/www-svg/2010Jun/0049.html Jan wrote: During searching I've found this document from yesterday! :-) http://dev.w3.org/SVG/modules/advancedgradients/SVGAdvancedGradientReqs.html [Non-text portions of this message have been removed] ------------------------------------ ----- 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: [email protected] [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/
