jme3-core: javadoc improvements

jme3-core/src/main/java/com/jme3/math/FastMath.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2020 jMonkeyEngine
+ * Copyright (c) 2009-2021 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -532,8 +532,8 @@ final public class FastMath {
     /**
      * A direct call to Math.atan2.
      *
-     * @param fY
-     * @param fX
+     * @param fY ordinate
+     * @param fX abscissa
      * @return Math.atan2(fY,fX)
      * @see java.lang.Math#atan2(double, double)
      */

jme3-core/src/main/java/com/jme3/math/Vector3f.java

@@ -1170,7 +1170,7 @@ public final class Vector3f implements Savable, Cloneable, java.io.Serializable
     }
 
     /**
-     * @param index
+     * @param index 0, 1, or 2
      * @return x value if index == 0, y value if index == 1 or z value if index == 2
      * @throws IllegalArgumentException
      *             if index is not one of 0, 1, 2.