Erik, isn't it peculiar that a fairly simple perspective distortion is missing from the SVG spec? ie just as you describe by increasing scaling along a line
especially given it's importance and history in western art? removed the typo, and updated slightly, thanks regards Jonathan Chetwynd Accessibility Consultant on Media Literacy and the Internet On 22 Jan 2008, at 12:05, Erik Dahlström wrote: On Tue, 22 Jan 2008 12:52:47 +0100, ~:'' ありがとうございま した。 <[EMAIL PROTECTED]> wrote: > there's a simple Brick Pattern here: > http://peepo.co.uk/temp/brick-pattern.svg You might want to remove the space in patternUnits="objectBounding Box". > feDisplacementMap may well be a possible route, however it does seem > somewhat complex in the relation to the concept. Not sure that would be able to give true perspective correct images though. > On 21 Jan 2008, at 23:27, Frank Bruder wrote: > > Hi, > > would be great if full 3x3 matrices--without the third row implicitly > set to [0 0 1]--were allowed for transform values. This would allow > for perspective distortions. But I'm not sure if this wouldn't be too > difficult for implementors since singularities (the horizon) would > need to be dealt with, in case they become visible. Indeed the 2d transforms that are in SVG today are not capable of handling this case. > There was a question before regarding perspective distortion of text. > And I remember someone suggested using the filter primitive > feDisplacementMap. But no solution for creating the correct image > data to use for in2 was found then. Maybe this was resolved in the > mean time. There are other tricks, for example drawing the image repeatedly (with clipping) while varying the scale transform. That would probably look a bit ugly though, possibly it could be smoothed out a bit by using filters or masks. Cheers /Erik -- Erik Dahlstrom, Core Technology Developer, Opera Software Co-Chair, W3C SVG Working Group Personal blog: http://my.opera.com/macdev_ed ----- 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/
