Changed DirectionalLight.setDirection javadoc to be more explicit.

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10902 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/light/DirectionalLight.java

@@ -69,8 +69,8 @@ public class DirectionalLight extends Light {
     /**
      * Sets the direction of the light.
      * <p>
-     * Represents the vector direction the light is coming from.
-     * (1, 0, 0) would represent a directional light coming from the X axis.
+     * Represents the direction the light is shining.
+     * (1, 0, 0) would represent light shining in the +X direction.
      * 
      * @param dir the direction of the light.
      */