source: trunk/src/org/expeditee/core/DamageAreas.java@ 1097

package org.expeditee.core;

import org.expeditee.core.bounds.AxisAlignedBoxBounds;
import org.expeditee.core.bounds.Bounds;
import org.expeditee.core.bounds.CombinationBounds;

/**
 * Handles the accumulation of damage areas and clip generation.
 * 
 * @author cts16
 */
public class DamageAreas {

        private CombinationBounds _damagedAreas = null;
        
        public DamageAreas()
        {
                // Do nothing (member allocated on use)
        }
        
        /** Adds an area to the damaged areas. */
        public synchronized void addArea(Bounds area)
        {
                if (_damagedAreas == null) {
                        _damagedAreas = new CombinationBounds(area);
                } else {
                        _damagedAreas.add(area);
                }
        }
        
        /** Resets the damaged areas to no area damaged. */
        public synchronized void clear()
        {
                _damagedAreas = null;
        }
        
        /**
         * Returns the rectangular clip enclosing the damaged areas.
         * Clears the clip at the same time.
         */
        public synchronized Clip getClip()
        {
                AxisAlignedBoxBounds bounds = AxisAlignedBoxBounds.getEnclosing(_damagedAreas);
                clear();
                if (bounds != null) {
                        return new Clip(bounds);
                } else {
                        return Clip.getFullClip();
                }
        }
        
}