/* * v_Average_vv.java */package EDU.gatech.cc.is.clay;import java.lang.*;import EDU.gatech.cc.is.util.Vec2;import EDU.gatech.cc.is.util.Units;/** * Average the Vec2 output of two embedded Vec2 nodes. * <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 v_Average_vv extends NodeVec2	{	public static final boolean DEBUG = Node.DEBUG;	private NodeVec2	embedded1;	private NodeVec2	embedded2;	private double		sphere = 1.0;	private double	        safety = 0.0;	/**	Instantiate a v_Average_vv schema.	@param im1 NodeVec2, an embedded perceptual schema that generates a vector			to be averaged.	@param im2 NodeVec2, an embedded perceptual schema that generates a vector			to be averaged.	*/	public v_Average_vv(NodeVec2 im1, NodeVec2 im2)		{		if (DEBUG) System.out.println("v_Average_vv: instantiated.");		embedded1 = im1;		embedded2 = im2;		}	Vec2	last_val = new Vec2();	long	lasttime = 0;	/**	Return a Vec2 representing the average of the two embedded nodes.	@param timestamp long, only get new information if timestamp > than last call                or timestamp == -1.	@return the vector average.	*/	public Vec2 Value(long timestamp)		{                if (DEBUG) System.out.println("v_Average_vv: Value()");                 if ((timestamp > lasttime)||(timestamp == -1))                        {                        /*--- reset the timestamp ---*/                        if (timestamp > 0) lasttime = timestamp;                         /*--- compute the average ---*/                        last_val = embedded1.Value(timestamp);			last_val.add(embedded2.Value(timestamp));			last_val.setr(last_val.r*0.5);                        }		return (new Vec2(last_val.x, last_val.y));		}        }