Added comments for GestureUtilities.

import static android.gesture.GestureConstants.*;

/**

 * Utility functions for gesture processing & analysis, including methods for:

 * <ul> 

 * <li>feature extraction (e.g., samplers and those for calculating bounding

 * boxes and gesture path lengths);

 * <li>geometric transformation (e.g., translation, rotation and scaling);

 * <li>gesture similarity comparison (e.g., calculating Euclidean or Cosine

 * distances between two gestures).

 * </ul>

 */

public final class GestureUtilities {

    private static final float SCALING_THRESHOLD = 0.26f;