/* * VisualObjectSensor.java */package EDU.gatech.cc.is.abstractrobot;import EDU.gatech.cc.is.util.*;/** * Provides an abstract interface to the simulated * hardware of a robot that equipped with vision. * <P> * <A HREF="../COPYRIGHT.html">Copyright</A> * (c)1997, 1998 Tucker Balch * * @author Tucker Balch * @version $Revision: 1.3 $ */public interface VisualObjectSensor	{        /**         * Get an array of Vec2s that represent the         * locations of visually sensed objects egocentrically         * from center of the robot to the objects currently sensed by the         * vision system.         * @param timestamp only get new information 	 *        if timestamp > than last call or timestamp == -1 .         * @param channel (1-6) which type/color of object to retrieve.         * @return the sensed objects.         */        public Vec2[] getVisualObjects(long timestamp, int channel);	  /**	    * This sets the amount of noise that will affect the sensor. the noise	    * is a normal distribution with mean of mean.	    * @param mean this is the mean of the distribution.  most cases this will be 0	    * @param stddev this is the standard deviation of the noise (>= 0.0)	    *                 if equal to 0, then noise will not affect the sensor	    * @param seed this is the value used to seed the number generator, for	    *             repeatable pseudorandom noise.	    */	  public void setVisionNoise(double mean, double stddev, long seed);	}