n class="type-var">'a</span></code></dt><dd><p>Same function as <code>List.fold_left</code> but on segments of a given polygon</p></dd></dl><dl><dt class="spec value" id="val-fold_filter"><a href="#val-fold_filter" class="anchor"></a><code><span class="keyword">val</span> fold_filter : <span>(<a href="../Geoml/Point/index.html#type-t">Geoml.Point.t</a> <span>&#45;&gt;</span> <a href="../Geoml/Point/index.html#type-t">Geoml.Point.t</a> <span>&#45;&gt;</span> bool)</span> <span>&#45;&gt;</span> <span>(<span c