81 lines
2.0 KiB
Java
81 lines
2.0 KiB
Java
/*
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* Minecraft Forge
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* Copyright (c) 2016-2019.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation version 2.1
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* of the License.
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*
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* This library 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 GNU
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* 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
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package net.minecraftforge.common.util;
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import net.minecraft.entity.player.ServerPlayerEntity;
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import net.minecraft.util.math.ChunkPos;
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// Sorter to load nearby chunks first
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public class ChunkCoordComparator implements java.util.Comparator<ChunkPos>
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{
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private int x;
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private int z;
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public ChunkCoordComparator(ServerPlayerEntity entityplayer)
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{
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x = (int) entityplayer.getPosX() >> 4;
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z = (int) entityplayer.getPosZ() >> 4;
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}
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@Override
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public int compare(ChunkPos a, ChunkPos b)
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{
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if (a.equals(b))
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{
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return 0;
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}
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// Subtract current position to set center point
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int ax = a.x - this.x;
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int az = a.z - this.z;
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int bx = b.x - this.x;
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int bz = b.z - this.z;
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int result = ((ax - bx) * (ax + bx)) + ((az - bz) * (az + bz));
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if (result != 0)
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{
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return result;
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}
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if (ax < 0)
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{
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if (bx < 0)
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{
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return bz - az;
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}
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else
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{
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return -1;
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}
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}
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else
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{
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if (bx < 0)
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{
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return 1;
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}
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else
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{
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return az - bz;
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}
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}
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}
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}
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