[svg-developers] Re: SVG Tiny and eliptical arcs

[Helder Magalhães]

 Why does SVG Tiny not have them? It strikes me as an odd thing to
 chose to exclude. In many cases arcs are far easier to use,
 particularly for things like technical diagrams where they may
 precisely express the intent while a Bezier curve can only approximate.

I fully agree with you. This will likely become nastier while
compliant SVG Mobile 1.2 implementations are made available and spread
widely. Nevertheless, I guess this had to do with historical reasons,
as SVG 1.1 tiny also didn't have these shapes [1]

Unfortunately I didn't have the time to expose that to the SVG-WG
within the 1.2 last call time limit [2]... :-| I'm not sure if there
was enough debate towards possibly including such feature in SVG 1.2
Mobile, specially considering the current alternative: approximation
with (potentially more than one) curves.

Regards,

 Helder Magalhães

[1] http://lists.w3.org/Archives/Public/www-svg/2008Jun/0056.html
[2] http://lists.w3.org/Archives/Public/www-svg/2008Sep/0049.html




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[svg-developers] Re: SVG Tiny and eliptical arcs

[Frank Bruder]

SVG Tiny is targeted at devices with high restrictions in CPU speed
and memory size.
Just calculating the center point of an elliptical arc requires
calculation of a sqare root and trigonometric functions (see
http://www.w3.org/TR/SVG11/implnote.html#ArcConversionEndpointToCenter
), and is therefore much more complicated than drawing Bezier curves,
which only requires the basic operations of addition and multiplication.

--- In svg-developers@yahoogroups.com, cwflamont [EMAIL PROTECTED] wrote:

 Why does SVG Tiny not have them? It strikes me as an odd thing to
 chose to exclude. In many cases arcs are far easier to use,
 particularly for things like technical diagrams where they may
 precisely express the intent while a Bezier curve can only approximate.






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