/* * va_FilterClose_va.java */package EDU.gatech.cc.is.clay;import java.lang.*;import EDU.gatech.cc.is.util.Vec2;import EDU.gatech.cc.is.util.Units;/** * Keep Vec2s that are close to 0,0. * <P> * For detailed information on how to configure behaviors, see the * <A HREF="../clay/docs/index.html">Clay page</A>. * <P> * <A HREF="../COPYRIGHT.html">Copyright</A> * (c)1997, 1998 Tucker Balch * * @author Tucker Balch * @version $Revision: 1.1 $ */public class va_FilterClose_va extends NodeVec2Array	{	/**	Turns debug printing on or off.	*/	public static final boolean DEBUG = Node.DEBUG;	private NodeVec2Array	embedded2;	private	double		range = 0.5;	/**	 * Instantiate a va_FilterClose_va node.	 * @param r how close things must be to be kept.	 * @param im2 NodeVec2Arry, the embedded node 	 *	that generates a list of items to filter.	 */	public va_FilterClose_va(double r, NodeVec2Array im2)		{		if (DEBUG) System.out.println("va_FilterClose_va: instantiated.");		embedded2 = im2;		range = r;		}	Vec2	last_val[] = new Vec2[0];	long	lasttime = 0;	/**	 * Return a filtered Vec2Array.	 * @param timestamp long, only get new 	 * information if timestamp > than last call or timestamp == -1.	 * @return the filtered array of Vec2s.	 */	public Vec2[] Value(long timestamp)		{		if ((timestamp > lasttime)||(timestamp == -1))			{			/*--- reset the timestamp ---*/			if (timestamp > 0) lasttime = timestamp;			/*--- get info from imbedded schemas ---*/			Vec2[] im2 = embedded2.Value(timestamp);			/*--- count ---*/			int count = 0;			for (int i=0; i<im2.length; i++)				{				Vec2 tmp = new Vec2(im2[i].x, im2[i].y);				if (tmp.r <= range)					count++;				}			/*--- fill it in ---*/			last_val = new Vec2[count];			count = 0;			for (int i=0; i<im2.length; i++)				{				Vec2 tmp = new Vec2(im2[i].x, im2[i].y);				if (tmp.r <= range)					last_val[count++] = im2[i];				}			}                Vec2[] retval = new Vec2[last_val.length];                for(int i = 0; i<last_val.length; i++)                        retval[i] = new Vec2(last_val[i].x,                                last_val[i].y);                return(retval);		}        }