Oh goodie ! Thanks for bringing that to my attention :)
In that case - I'd say - traverse the curve and find the max-min x and y coords for the curve itself. The parametric equations will be x = a3*u^3 + a2*u^2 + a1*u + a0 y = b3*u^3 + b2*u^2 + b1*u + b0 where the a's and the b's are given as... a3 = (x3 + 3(x1 - x2) - x0)/8 a2 = (3(x3 - x2 - x1 + x0))/8 a1 = (x3 - x0)/2 - a3 a0 = (x3 + x0)/2 - a2 b3 = (y3 + 3(y1 - y2) - y0)/8 b2 = (3(y3 - y2 - y1 + y0))/8 b1 = (b3 - b0)/2 - b3 b0 = (y3 + y0)/2 - b2 varying the value of u from -1 to 1 you'll traverse the entire curve. Just keep updating your maxX and maxY with the maximum values you get of x and y throughout this traversal. This shall form your bounding box :) hope this helps. -Arvind --- In [email protected], Fernando Silva <[EMAIL PROTECTED]> wrote: > Thanks for your attention. > Well, let's see the following example that draws a bezier curve > > <path d="M100,200 C100,100 250,100 250,200" /> > > if we use the min/max the bounding box would be (100,100 250,200) > but after drawing it with inkscape it's easy to see that would be not > the real bounding box... > > Thanks, > Fernando Silva > > On 8/17/05, buddy4n <[EMAIL PROTECTED]> wrote: > > If along the axis - that should be a method to detect the maximum and > > minimum x and y coordinates through All control points of the path. > > > > cheers. > > it's bubbling up the max and min :) > > > > If you have any other requirements, I wouldn't know it yet :) > > -Arvind > > > > --- In [email protected], Fernando Silva <[EMAIL PROTECTED]> > > wrote: > > > Hi guys, > > > > > > I'm trying to calculate the bounding box of an element *without* using > > > getBBox(). If for shapes it's easy to calculate it, what is the > > > formula to calculate the BBox for a "path"? > > > > > > Thanks, > > > Fernando Silva > > > > > > > > > > > > ----- > > To unsubscribe send a message to: svg-developers- [EMAIL PROTECTED] > > -or- > > visit http://groups.yahoo.com/group/svg-developers and click "edit my membership" > > ---- > > Yahoo! Groups Links > > > > > > > > > > > > > > ------------------------ Yahoo! Groups Sponsor --------------------~--> <font face=arial size=-1><a href="http://us.ard.yahoo.com/SIG=12hm6b64n/M=362329.6886308.7839368.1510227/D=groups/S=1706030389:TM/Y=YAHOO/EXP=1124315754/A=2894321/R=0/SIG=11dvsfulr/*http://youthnoise.com/page.php?page_id=1992 ">Fair play? Video games influencing politics. Click and talk back!</a>.</font> --------------------------------------------------------------------~-> ----- 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/ <*> 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/
