1 package org.djutils.quadtree; 2 3 /** 4 * Interface that must be implemented by objects that need to be stored in a quad tree. 5 * <p> 6 * @author <a href="http://www.tudelft.nl/pknoppers">Peter Knoppers</a> 7 */ 8 public interface Envelope 9 { 10 /** 11 * Determine the bounding box. The result must be constant; it may not vary from one call to the next. Objects implementing 12 * this interface should probably cache the result of this method. 13 * @return Rectangle; the bounding box 14 */ 15 Rectangle getBoundingRectangle(); 16 17 }