pi/java.base/java/lang/IllegalArgumentException.html" title="class or interface in java.lang" class="external-link">IllegalArgumentException</a></code> - if alpha &lt; 0 or alpha &gt; 1</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="setAlpha(double,com.codingame.gameengine.module.entities.Curve)">
<h3>setAlpha</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="Entity.html" title="type parameter in Entity">T</a></span>&nbsp;<span cla