 ultrasound transducers facing in the x-direction.</p>

<p><code>beamPlot</code> can alternatively be called with two 2D slices which are plotted as intersecting planes indexed as (x, y) and (x, z). The slices must have the same size in the x-direction.</p>

<p>Examples:</p>

<pre class="codeinput">
beamPlot(makeBall(30, 30, 30, 15, 15, 15, 12));
beamPlot(makeDisc(40, 30, 20, 15, 10), makeDisc(40, 20, 20, 10, 5)); 
</pre>

<img vspace="5" hspace="5" src="images/beamPlot_01.png" style="width:560px;height:420