Clarify behavior on matrix interpolation on non-invertible matrices.

Author: dirkschulze

css3-transforms/ChangeLog

@@ -1,4 +1,7 @@
-2012-05-26 dschulze@adobe.com
+2012-05-29 dschulze@adobe.com
+    Clarify behavior on matrix interpolation on non-invertible matrices.
+
+2012-05-28 dschulze@adobe.com
     Add note about side effects on converting transform functions to matrix. 
 
 2012-05-28 ayg@aryeh.name

css3-transforms/Overview.html

@@ -39,14 +39,14 @@
 
    <h1>CSS Transforms</h1>
 
-   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 28 May 2012</h2>
+   <h2 class="no-num no-toc" id=longstatus-date>Editor's Draft 29 May 2012</h2>
 
    <dl>
     <dt>This version:
 
     <dd> <a
-     href="http://www.w3.org/TR/2012/ED-css3-transforms-20120528/">http://dev.w3.org/csswg/css3-transforms/</a>
-     <!--http://www.w3.org/TR/2012/WD-css3-transforms-20120528/-->
+     href="http://www.w3.org/TR/2012/ED-css3-transforms-20120529/">http://dev.w3.org/csswg/css3-transforms/</a>
+     <!--http://www.w3.org/TR/2012/WD-css3-transforms-20120529/-->
 
     <dt>Latest version:
 
@@ -2901,6 +2901,10 @@ <h2 id=matrix-interpolation><span class=secno>20. </span> Interpolation of
     a linearly interpolation of the transform functions.</p>
   </div>
 
+  <p> If one of the matrices for interpolation is non-invertible, the used
+   animation function must fallback to a discrete animation according to the
+   rules of the respective animation specification.
+
   <h3 id=matrix-decomposing><span class=secno>20.1. </span>Decomposing the
    Matrix</h3>
 

css3-transforms/Transforms.src.html

@@ -2743,6 +2743,12 @@ <h2 id="matrix-interpolation">
                   the transform functions.
                 </p>
               </div>
+              
+              <p>
+                If one of the matrices for interpolation is non-invertible, the used animation
+                function must fallback to a discrete animation according to the rules of the
+                respective animation specification.
+              </p>
 
               <h3 id="matrix-decomposing">Decomposing the Matrix</h3>