assets/icons.svg#icon-anchor"></use></svg></a></li><li class="tsd-description"><div class="tsd-comment tsd-typography"><p>Returns the electrical field in the Y direction acting on a vertex at the given point.
By default there is no electrical field at any location.</p>
<p>Used to define an external electrical field at a point independent of the vertex charges.
A vertex L is acted upon by a force in the Y direction of proportional to
<code>electricalFieldY(L.center.x, L.center.y) * electricalCharge(L)</code>