141 lines
2.9 KiB
Java
141 lines
2.9 KiB
Java
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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static class RouteComplete extends Exception
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{
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private static final long serialVersionUID = 810456465120286110L;
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};
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PathGridCache pgc;
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public PathSegment(PathGridCache myPGC, List open, Set semiopen, Set closed)
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{
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this.open = open;
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this.semiopen = semiopen;
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this.closed = closed;
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pgc = myPGC;
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isDead = false;
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}
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List<IPathItem> open;
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Set<IPathItem> semiopen;
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Set<IPathItem> closed;
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public boolean step()
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{
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List<IPathItem> oldOpen = open;
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open = new LinkedList();
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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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if ( !closed.contains( pi ) )
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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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if ( !semiopen.contains( pi ) )
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{
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boolean worked = false;
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if ( flags.contains( GridFlags.COMPRESSED_CHANNEL ) )
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worked = useDenseChannel( pi );
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else
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worked = useChannel( pi );
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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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semiopen.add( (IPathItem) otherNodes );
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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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semiopen.remove( pi );
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}
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}
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closed.add( pi );
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open.add( pi );
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}
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}
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}
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return open.isEmpty();
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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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pgc.channelsByBlocks++;
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pi.incrementChannelCount( 1 );
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pi = pi.getControllerRoute();
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}
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pgc.channelsInUse++;
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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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pgc.channelsByBlocks++;
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pi.incrementChannelCount( 1 );
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pi = pi.getControllerRoute();
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}
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pgc.channelsInUse++;
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return true;
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}
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}
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