/* * b_SameXSign_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;/** * Returns true if the values of the * two embedded schemas' x components are both negative or * both positive. * <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 b_SameXSign_vv extends NodeBoolean	{	/** 	Turn debug printing on or off.	*/	public static final boolean DEBUG = Node.DEBUG;	private NodeVec2	embedded1;	private NodeVec2	embedded2;	/**	Instantiate a b_SameXSign_vv schema.	@param im1 NodeVec2, an embedded node that generates a vector			to be detected.	@param im2 NodeVec2, an embedded node that generates a vector			to be detected.	*/	public b_SameXSign_vv(NodeVec2 im1, NodeVec2 im2)		{		if (DEBUG) System.out.println("b_SameXSign_vv: instantiated.");		embedded1 = im1;		embedded2 = im2;		}	boolean	last_val = false;	long	lasttime = 0;	/**	Return a boolean indicating if the two embedded schemas	have X components of the same sign.	@param timestamp long, only get new information if timestamp > than last call                or timestamp == -1.	@return true if same, false if not.	*/	public boolean Value(long timestamp)		{                if (DEBUG) System.out.println("b_SameXSign_vv: Value()");                 if ((timestamp > lasttime)||(timestamp == -1))                        {                        /*--- reset the timestamp ---*/                        if (timestamp > 0) lasttime = timestamp;                         /*--- compute the output ---*/                        Vec2 tmp1 = embedded1.Value(timestamp);                        Vec2 tmp2 = embedded2.Value(timestamp);			if (((tmp1.x<0)&&(tmp2.x<0))||((tmp1.x>0)&&(tmp2.x>0)))				last_val = true;			else				last_val = false;                        }		return (last_val);		}        }