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About animate-elem-227-t.svg

From: Julien Reichel <Julien.Reichel@spinetix.com>
Date: Mon, 8 Feb 2010 12:34:47 +0100
Message-ID: <364D31930BDB974AB40E22C5C2E584ED5518A0@asterix.SPINETIX.local>
To: <www-svg@w3.org>
Dear all,

 

In the test case animate-elem-227-t for SVG 1.2 [1]

 

The following is stated:

- the circle at the top right appears at 2.5 seconds (discrete animation),
with a green fill

- the circle at the bottom right (with a green fill) disappears at 2.5
seconds (discrete animation)

 

The animation (for the second test) is:

<circle r="50" cx="390" cy="220" fill="yellow">

  <animateColor attributeName="fill" dur="5s" to="none" fill="freeze"/>

</circle>

 

The test is checking the behavior of a discrete animation without a "from"
attribute.

 

 

According to the SVG TR [2]:

Except for any SVG-specific rules explicitly mentioned in this specification,
the normative definition for this attribute is found in the Simple animation
functions specified by from, to and by
<http://www.w3.org/TR/2005/REC-SMIL2-20051213/animation.html#adef-to>
section of the SMIL 2.1 Animation Modules ([SMIL21
<http://www.w3.org/TR/SVGMobile12/refs.html#ref-SMIL21> ], section 3.5.4).

 

According to SMIL REC [3]: 

Since a to animation has only 1 value, a discrete to animation will simply
set the to
<http://www.w3.org/TR/2005/REC-SMIL2-20051213/animation.html#adef-to>  value
for the simple duration.

 

I couldn't find anywhere in the SVG specification that the discrete animation
with a "to" and no "from" should behave differently than what is specified in
the SMIL specification. However the tetcase assumes that a different rule is
used (implicit definition of the from attribute).

 

Note that the test animate-elem-226-t.svg actually uses the same assumption.
href will stay constant (to the orange image) if the player follows the SMIL
specification.

 

Can somebody clarify this point ? (either pointing to the specification or to
a corrected testset ?)

 

Regards

 

Julien

 

[1] http://dev.w3.org/SVG/profiles/1.2T/test/svg/animate-elem-227-t.svg

[2] http://www.w3.org/TR/SVGMobile12/animate.html#ToAttribute

[3]
http://www.w3.org/TR/2005/REC-SMIL2-20051213/animation.html#animationNS-ToAni
mation

 

 

 

Julien Reichel, PhD

Technology Architect

___________________________

SpinetiX SA

Rue des Terreaux 17

1003 Lausanne, Switzerland

 

T  +41 21 341 15 50

F  +41 21 311 19 56

julien.reichel@spinetix.com

http://www.spinetix.com

___________________________

 
Received on Monday, 8 February 2010 11:35:21 GMT

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