[web-animations-1] Drop transform list animation type from Web Animations

This text has now been improved and moved to CSS Transforms Level 2.

Author: birtles

web-animations-1/Overview.bs

@@ -3079,57 +3079,6 @@ to the property's specified {{PropertyDescriptor/syntax}}
 or when the <a>custom property</a> is not registered,
 the <a>animation type</a> is <a>discrete</a>.
 
-<h4 id="transform-list-animation-type-section">Transform list</h4>
-
-A property whose <a>animation type</a> is <dfn
-lt="transform list animation type">transform list</dfn> has the following
-behavior:
-
-*   <a lt="interpolation">interpolation</a>:
-    as defined in <a
-    href="https://www.w3.org/TR/css-transforms-1/#interpolation-of-transforms">Interpolation
-    of Transforms</a> [[CSS3-TRANSFORMS]].
-
-*   <a lt="value addition">addition</a>: performed by
-    concatenating transform lists as
-    &lsquo;<var>V</var><sub>a</sub> <var>V</var><sub>b</sub>&rsquo;.
-
-*   <a lt="value accumulation">accumulation</a>:
-
-    1.  Beginning at the end of each list, <var>V</var><sub>a</sub>
-        and <var>V</var><sub>b</sub>,
-        find the largest contiguous portion of each list where the
-        corresponding list elements from each list have the same
-        transform type.
-        Call the matching portions from <var>V</var><sub>a</sub> and
-        <var>V</var><sub>b</sub>, <var>V</var><sub>matching-a</sub>
-        and
-        <var>V</var><sub>matching-b</sub> respectively and likewise
-        <var>V</var><sub>remainder-a</sub> and
-        <var>V</var><sub>remainder-b</sub> for the non-matching
-        parts.
-        <p class="issue">
-          We should probably expand 2d functions to their 3d
-          equivalents before matching?
-        </p>
-    2.  Let <var>V</var><sub>combined</sub> be a transform list
-        combining <var>V</var><sub>matching-a</sub> and
-        <var>V</var><sub>matching-b</sub> by adding the numeric
-        components of each corresponding function.
-        <p class="issue">
-          This needs to be more specific, e.g. when combining
-          <code>translate(20px)</code> and <code>translate(30px
-          10px)</code> we have to expand the first function to
-          <code>translate(20px 0px)</code> first.
-          Probably need to define unit conversion too.
-        </p>
-    3.  The result of accumulation is a transform list created by <a
-        lt="value addition">adding</a> the combined result
-        with the non-matching portions of the two lists as follows:
-        &lsquo;<var>V</var><sub>remainder-a</sub>
-        <var>V</var><sub>remainder-b</sub>
-        <var>V</var><sub>combined</sub>&rsquo;.
-
 
 <h3 id="keyframe-effects">Keyframe effects</h3>