2014-11-14 12:02:52 +01:00
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/*
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* This file is part of Applied Energistics 2.
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* Copyright (c) 2013 - 2014, AlgorithmX2, All rights reserved.
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*
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* Applied Energistics 2 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Applied Energistics 2 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Applied Energistics 2. If not, see <http://www.gnu.org/licenses/lgpl>.
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*/
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2014-09-24 02:26:27 +02:00
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package appeng.me.pathfinding;
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import java.util.EnumSet;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Set;
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import appeng.api.networking.GridFlags;
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import appeng.api.networking.IGridMultiblock;
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import appeng.api.networking.IGridNode;
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import appeng.me.cache.PathGridCache;
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public class PathSegment
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{
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public boolean isDead;
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2014-09-29 09:54:34 +02:00
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final PathGridCache pgc;
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2014-09-24 02:26:27 +02:00
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2014-09-28 22:20:14 +02:00
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public PathSegment(PathGridCache myPGC, List<IPathItem> open, Set<IPathItem> semiOpen, Set<IPathItem> closed)
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2014-09-24 02:26:27 +02:00
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{
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this.open = open;
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2014-09-28 11:47:17 +02:00
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this.semiOpen = semiOpen;
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2014-09-24 02:26:27 +02:00
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this.closed = closed;
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2014-12-29 15:13:47 +01:00
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this.pgc = myPGC;
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this.isDead = false;
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2014-09-24 02:26:27 +02:00
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}
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List<IPathItem> open;
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2014-09-29 09:54:34 +02:00
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final Set<IPathItem> semiOpen;
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final Set<IPathItem> closed;
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2014-09-24 02:26:27 +02:00
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public boolean step()
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{
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2014-12-29 15:13:47 +01:00
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List<IPathItem> oldOpen = this.open;
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this.open = new LinkedList<IPathItem>();
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2014-09-24 02:26:27 +02:00
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for (IPathItem i : oldOpen)
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{
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for (IPathItem pi : i.getPossibleOptions())
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{
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EnumSet<GridFlags> flags = pi.getFlags();
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2014-12-29 15:13:47 +01:00
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if ( !this.closed.contains( pi ) )
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2014-09-24 02:26:27 +02:00
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{
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pi.setControllerRoute( i, true );
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if ( flags.contains( GridFlags.REQUIRE_CHANNEL ) )
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{
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// close the semi open.
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2014-12-29 15:13:47 +01:00
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if ( !this.semiOpen.contains( pi ) )
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2014-09-24 02:26:27 +02:00
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{
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2014-10-04 19:05:11 +02:00
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boolean worked;
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2014-09-24 02:26:27 +02:00
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if ( flags.contains( GridFlags.COMPRESSED_CHANNEL ) )
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2014-12-29 15:13:47 +01:00
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worked = this.useDenseChannel( pi );
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2014-09-24 02:26:27 +02:00
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else
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2014-12-29 15:13:47 +01:00
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worked = this.useChannel( pi );
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2014-09-24 02:26:27 +02:00
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if ( worked && flags.contains( GridFlags.MULTIBLOCK ) )
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{
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Iterator<IGridNode> oni = ((IGridMultiblock) ((IGridNode) pi).getGridBlock()).getMultiblockNodes();
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while (oni.hasNext())
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{
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IGridNode otherNodes = oni.next();
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if ( otherNodes != pi )
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this.semiOpen.add( (IPathItem) otherNodes );
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2014-09-24 02:26:27 +02:00
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}
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}
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}
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else
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{
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pi.incrementChannelCount( 1 ); // give a channel.
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2014-12-29 15:13:47 +01:00
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this.semiOpen.remove( pi );
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2014-09-24 02:26:27 +02:00
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}
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}
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2014-12-29 15:13:47 +01:00
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this.closed.add( pi );
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this.open.add( pi );
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2014-09-24 02:26:27 +02:00
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}
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}
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}
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2014-12-29 15:13:47 +01:00
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return this.open.isEmpty();
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2014-09-24 02:26:27 +02:00
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}
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private boolean useChannel(IPathItem start)
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{
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IPathItem pi = start;
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while (pi != null)
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{
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if ( !pi.canSupportMoreChannels() )
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return false;
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pi = pi.getControllerRoute();
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}
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pi = start;
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while (pi != null)
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{
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2014-12-29 15:13:47 +01:00
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this.pgc.channelsByBlocks++;
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2014-09-24 02:26:27 +02:00
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pi.incrementChannelCount( 1 );
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pi = pi.getControllerRoute();
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}
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2014-12-29 15:13:47 +01:00
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this.pgc.channelsInUse++;
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2014-09-24 02:26:27 +02:00
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return true;
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}
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private boolean useDenseChannel(IPathItem start)
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{
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IPathItem pi = start;
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while (pi != null)
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{
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if ( !pi.canSupportMoreChannels() || pi.getFlags().contains( GridFlags.CANNOT_CARRY_COMPRESSED ) )
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return false;
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pi = pi.getControllerRoute();
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}
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pi = start;
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while (pi != null)
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{
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2014-12-29 15:13:47 +01:00
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this.pgc.channelsByBlocks++;
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2014-09-24 02:26:27 +02:00
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pi.incrementChannelCount( 1 );
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pi = pi.getControllerRoute();
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}
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2014-12-29 15:13:47 +01:00
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this.pgc.channelsInUse++;
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2014-09-24 02:26:27 +02:00
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return true;
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}
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}
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