an> <span class="type-var">'a</span> * <span class="type-var">'b</span> * <span class="type-var">'c</span> * <span class="type-var">'d</span></code></dt><dd><p>Make p0 p1 p2 p3 build a bezier curve starting in p0, and ending in p3, with p1 and p2 as control points</p></dd></dl><dl><dt class="spec value" id="val-start"><a href="#val-start" class="anchor"></a><code><span class="keyword">val</span> start : <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="../../../Geoml/Point/index.html#type-t"