Re: [xsl] Math "functions" for XSLT 1.0

[Dimitre Novatchev <dnovatchev@xxxxxxxxx>]

Could you, please, identify the algorithms used (such as well-known
name, link, etc.)?


--
Cheers,
Dimitre Novatchev
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Truly great madness cannot be achieved without significant intelligence.
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To invent, you need a good imagination and a pile of junk
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Never fight an inanimate object
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You've achieved success in your field when you don't know whether what
you're doing is work or play




On Tue, Mar 2, 2010 at 11:18 PM, COUTHURES Alain
<alain.couthures@xxxxxxxxxxxxx> wrote:
>
> Hello,
>
> As you know, XSLT 1.0 and XPath 1.0 are now widely supported.
>
> Unfortunately, XPath 1.0 doesn't come with mathematical functions such as
"sqrt", "sin", "cos", "ln",... XPath 2.1 surely will but we'll have to wait to
see it available in every environment.
>
> Because such functions may be required for graphics generation, a workaround
has to be used. Hopefully, named templates can be defined with XSLT 1.0: a
name, one or more parameters and every XSLT 1.0 possibility, recursivity to be
used instead of loops.
>
> Algorithms based on B +, -, * and / only are not that easy to find.
CORDIC-based algorithms are not always very precise. Others, such as the ones
for a Javascript engine, are optimized for binary processing.
>
> Anyway, it works!
>
> You can have a look at http://www.agencexml.com/math/math.xml and
http://www.agencexml.com/math/math.xsl
>
> As you can see, it's fast and precise.
>
> Best regards,
>
> Alain Couthures
> <agenceXML>
> Bordeaux, France
> http://www.agencexml.com