/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: BoundingBoxMetric.java
* Written by Team 6: Sebastian Roether, Jochen Lutz
*
* This code has been developed at the Karlsruhe Institute of Technology (KIT), Germany,
* as part of the course "Multicore Programming in Practice: Tools, Models, and Languages".
* Contact instructor: Dr. Victor Pankratius (pankratius@ipd.uka.de)
*
* Copyright (c) 2010 Sun Microsystems and Static Free Software
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.tool.placement.simulatedAnnealing2;
import com.sun.electric.tool.placement.PlacementFrame.PlacementNetwork;
import com.sun.electric.tool.placement.PlacementFrame.PlacementNode;
import com.sun.electric.tool.placement.PlacementFrame.PlacementPort;
import java.util.Map;
/**
* Class that implements a bounding box net length approximation
*/
public final class BoundingBoxMetric extends Metric
{
/**
* Method that calculates the bounding box net length approximation for a given net
* @param net
* @return bounding box metric of the net
*/
@Override
public double netLength( PlacementNetwork net )
{
double minX = Double.MAX_VALUE, minY = Double.MAX_VALUE, maxX = -Double.MAX_VALUE, maxY = -Double.MAX_VALUE;
for ( PlacementPort port : net.getPortsOnNet() ) {
double currX = port.getPlacementNode().getPlacementX() + port.getRotatedOffX();
double currY = port.getPlacementNode().getPlacementY() + port.getRotatedOffY();
if ( currX < minX ) minX = currX;
if ( currY < minY ) minY = currY;
if ( currX > maxX ) maxX = currX;
if ( currY > maxY ) maxY = currY;
}
return Math.abs(maxX - minX) + Math.abs(maxY - minY);
}
/**
* Method that calculates the bounding box net length approximation for a given net.
* It hashes the nodes of the ports in the nets to its proxies.
* Also, it may substitute a node with another one just for this calculation
*
* @param net
* @param proxyMap a map that maps a node to its proxy node
* @param originals
* @param replacements
* @return bounding box metric of the proxied net with regards to the substitutions
*/
@Override
public double netLength( PlacementNetwork net, Map<PlacementNode, ProxyNode> proxyMap, ProxyNode[] originals, ProxyNode[] replacements )
{
double minX = Double.MAX_VALUE, minY = Double.MAX_VALUE, maxX = -Double.MAX_VALUE, maxY = -Double.MAX_VALUE;
for ( PlacementPort port : net.getPortsOnNet() ) {
ProxyNode proxy = proxyMap.get( port.getPlacementNode() );
for(int i = 0; i < originals.length; i++)
if(proxy == originals[i]) proxy = replacements[i];
double currX = proxy.getPlacementX() + port.getRotatedOffX();
double currY = proxy.getPlacementY() + port.getRotatedOffY();
if ( currX < minX ) minX = currX;
if ( currY < minY ) minY = currY;
if ( currX > maxX ) maxX = currX;
if ( currY > maxY ) maxY = currY;
}
return Math.abs(maxX - minX) + Math.abs(maxY - minY);
}
}