Re: Interesting read about scriptless animation

Hi David,

I have noticed that when I code in SMIL that I have to break the tags 
into 2 categories, depending on whether they will cycle. By that I mean, 
rotate, skew, translate,  and scale will cycle, but all other SMIL tags 
will only cycle if they reference a tag that cycles. For example, if you 
try to use a set attribute on opacity to blink a light, the light will 
not blink unless you reference it to a tag that will cycle such as scale 
(<set> won't cycle). Is this by intent? If it is, then I wouldn't say 
that SMIL passes as a declarative language. You could call the animation 
tags declarative, or maybe you could call the other tags a declarative 
markup.

For example, this will not blink.

    <set attributeName="opacity" id="sa_g2_0_f0" to="0" dur="6s"
       begin="0s; sa_g2_0_f2.end"/>

     <set attributeName="opacity" id="sa_g2_0_f2" to="1"
       begin="6s; sa_g2_0_f0.end" dur="6s"/>

But, this will blink.

     <set attributeName="opacity" id="sa_g2_0_f0" to="0" dur="6s"
       begin="0s; scl_g2_0_f3.end"/>

     <set attributeName="opacity" id="sa_g2_0_f2" to="1"
       begin="6s; scl_g2_0_f3.end+6s" dur="6s"/>

     <g id="scl_g2_0" parnt_nod="g2_0">

       <use x="0" y="0" id="us_g2_0" width="1000" height="1000" 
xlink:href="#g2_sprt"/>

       <animateTransform attributeName="transform" attributeType="XML" 
type="scale"
         fill="remove" repeatCount="1"
         begin="0s; scl_g2_0_f3.end" dur="6s" id="scl_g2_0_f0" 
from="0.6" to="0.15"/>

       <animateTransform attributeName="transform" attributeType="XML" 
type="scale"
         fill="remove" repeatCount="1"
         begin="6s; scl_g2_0_f3.end+6s" dur="3s" id="scl_g2_0_f2" 
bgn_scl_nmbr="0.15"
         from="0.15" to="0.3" />

       <animateTransform attributeName="transform" attributeType="XML" 
type="scale"
         fill="remove" repeatCount="1" begin="9s; scl_g2_0_f2.end" dur="3s"
         id="scl_g2_0_f3" from="0.3" to="0.6" />

     </g>


Best Regards,
Joe


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