arget"></a></dt>
<dd><p>ending projection</p></dd>


<dt id="arg-frozen">frozen<a class="anchor" aria-label="anchor" href="#arg-frozen"></a></dt>
<dd><p>matrix giving frozen variables, as described in
<code><a href="freeze.html">freeze</a></code></p></dd>

</dl></div>
    <div id="value">
    <h2>Value</h2>


<dl><dt>interpolate</dt>
<dd><p>A function with single parameter in [0, 1] that
    returns an interpolated frame between the current and future frames.
    0 gives the current plane, 1 gives the new t