Sebastian Hartte
334 lines
11 KiB
Java
334 lines
11 KiB
Java
/*
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* This file is part of Applied Energistics 2.
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* Copyright (c) 2013 - 2015, 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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package appeng.services;
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import java.util.WeakHashMap;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.Future;
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import java.util.concurrent.ThreadFactory;
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import java.util.concurrent.TimeUnit;
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import javax.annotation.Nonnull;
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import net.minecraft.block.Block;
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import net.minecraft.server.MinecraftServer;
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import net.minecraft.util.math.BlockPos;
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import net.minecraft.util.math.ChunkPos;
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import net.minecraft.world.IServerWorld;
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import net.minecraft.world.chunk.IChunk;
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import net.minecraft.world.server.ServerWorld;
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import net.minecraftforge.event.world.WorldEvent;
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import net.minecraftforge.eventbus.api.SubscribeEvent;
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import appeng.api.util.DimensionalCoord;
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import appeng.core.Api;
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import appeng.services.compass.CompassReader;
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import appeng.services.compass.ICompassCallback;
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public final class CompassService {
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private static final int CHUNK_SIZE = 16;
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private final MinecraftServer server;
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private final WeakHashMap<ServerWorld, CompassReader> worldSet = new WeakHashMap<>(10);
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private final ExecutorService executor;
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private int jobSize;
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public CompassService(MinecraftServer server, @Nonnull final ThreadFactory factory) {
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this.server = server;
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this.executor = Executors.newSingleThreadExecutor(factory);
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this.jobSize = 0;
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}
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public Future<?> getCompassDirection(final DimensionalCoord coord, final int maxRange, final ICompassCallback cc) {
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this.jobSize++;
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return this.executor.submit(new CMDirectionRequest(coord, maxRange, cc));
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}
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/**
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* Ensure the a compass service is removed once a world gets unloaded by forge.
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*
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* @param event the event containing the unloaded world.
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*/
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// FIXME this is never registered
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@SubscribeEvent
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public void unloadWorld(final WorldEvent.Unload event) {
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if (!(event.getWorld() instanceof ServerWorld)) {
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return;
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}
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ServerWorld world = (ServerWorld) event.getWorld();
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if (this.worldSet.containsKey(world)) {
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final CompassReader compassReader = this.worldSet.remove(world);
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compassReader.close();
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}
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}
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private int jobSize() {
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return this.jobSize;
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}
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private void cleanUp() {
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for (final CompassReader cr : this.worldSet.values()) {
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cr.close();
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}
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}
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public void tryUpdateArea(final IServerWorld w, ChunkPos chunkPos) {
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// If this seems weird: during worldgen, WorldAccess is a specific region, but
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// getWorld is
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// still the server world. We do need to use the world access to get the chunk
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// in question
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// though, since during worldgen, it's not comitted to the actual world yet.
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IChunk chunk = w.getChunk(chunkPos.x, chunkPos.z);
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updateArea(w.getWorld(), chunk);
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}
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public void updateArea(final ServerWorld w, IChunk chunk) {
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this.updateArea(w, chunk, CHUNK_SIZE);
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this.updateArea(w, chunk, CHUNK_SIZE + 32);
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this.updateArea(w, chunk, CHUNK_SIZE + 64);
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this.updateArea(w, chunk, CHUNK_SIZE + 96);
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this.updateArea(w, chunk, CHUNK_SIZE + 128);
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this.updateArea(w, chunk, CHUNK_SIZE + 160);
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this.updateArea(w, chunk, CHUNK_SIZE + 192);
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this.updateArea(w, chunk, CHUNK_SIZE + 224);
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}
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/**
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* Notifies the compass service that a skystone block has either been placed or
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* replaced at the give position.
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*/
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public void notifyBlockChange(final ServerWorld w, BlockPos pos) {
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IChunk chunk = w.getChunk(pos);
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updateArea(w, chunk, pos.getY());
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}
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private Future<?> updateArea(final ServerWorld w, IChunk c, int y) {
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this.jobSize++;
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final int cdy = y >> 5;
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final int low_y = cdy << 5;
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final int hi_y = low_y + 32;
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// lower level...
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int cx = c.getPos().x;
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int cz = c.getPos().z;
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Block skyStoneBlock = Api.instance().definitions().blocks().skyStoneBlock().block();
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BlockPos.Mutable pos = new BlockPos.Mutable();
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for (int i = 0; i < CHUNK_SIZE; i++) {
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pos.setX(i);
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for (int j = 0; j < CHUNK_SIZE; j++) {
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pos.setZ(j);
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for (int k = low_y; k < hi_y; k++) {
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pos.setY(k);
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final Block blk = c.getBlockState(pos).getBlock();
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if (blk == skyStoneBlock) {
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return this.executor.submit(new CMUpdatePost(w, cx, cz, cdy, true));
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}
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}
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}
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}
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return this.executor.submit(new CMUpdatePost(w, cx, cz, cdy, false));
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}
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public void kill() {
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this.executor.shutdown();
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try {
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this.executor.awaitTermination(6, TimeUnit.MINUTES);
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this.jobSize = 0;
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for (final CompassReader cr : this.worldSet.values()) {
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cr.close();
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}
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this.worldSet.clear();
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} catch (final InterruptedException e) {
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// wrap this up..
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}
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}
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private CompassReader getReader(final ServerWorld world) {
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CompassReader cr = this.worldSet.get(world);
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if (cr == null) {
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cr = new CompassReader(world);
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this.worldSet.put(world, cr);
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}
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return cr;
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}
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private int dist(final int ax, final int az, final int bx, final int bz) {
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final int up = (bz - az) * CHUNK_SIZE;
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final int side = (bx - ax) * CHUNK_SIZE;
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return up * up + side * side;
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}
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private double rad(final int ax, final int az, final int bx, final int bz) {
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final int up = bz - az;
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final int side = bx - ax;
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return Math.atan2(-up, side) - Math.PI / 2.0;
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}
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private class CMUpdatePost implements Runnable {
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public final ServerWorld world;
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public final int chunkX;
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public final int chunkZ;
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public final int doubleChunkY; // 32 blocks instead of 16.
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public final boolean value;
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public CMUpdatePost(final ServerWorld world, final int cx, final int cz, final int dcy, final boolean val) {
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this.world = world;
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this.chunkX = cx;
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this.doubleChunkY = dcy;
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this.chunkZ = cz;
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this.value = val;
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}
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@Override
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public void run() {
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CompassService.this.jobSize--;
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final CompassReader cr = CompassService.this.getReader(this.world);
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cr.setHasBeacon(this.chunkX, this.chunkZ, this.doubleChunkY, this.value);
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if (CompassService.this.jobSize() < 2) {
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CompassService.this.cleanUp();
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}
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}
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}
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private class CMDirectionRequest implements Runnable {
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public final int maxRange;
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public final DimensionalCoord coord;
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public final ICompassCallback callback;
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public CMDirectionRequest(final DimensionalCoord coord, final int getMaxRange, final ICompassCallback cc) {
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this.coord = coord;
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this.maxRange = getMaxRange;
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this.callback = cc;
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}
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@Override
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public void run() {
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ServerWorld world = (ServerWorld) this.coord.getWorld();
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CompassService.this.jobSize--;
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final int cx = this.coord.x >> 4;
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final int cz = this.coord.z >> 4;
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final CompassReader cr = CompassService.this.getReader(world);
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// Am I standing on it?
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if (cr.hasBeacon(cx, cz)) {
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this.callback.calculatedDirection(true, true, -999, 0);
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if (CompassService.this.jobSize() < 2) {
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CompassService.this.cleanUp();
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}
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return;
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}
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// spiral outward...
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for (int offset = 1; offset < this.maxRange; offset++) {
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final int minX = cx - offset;
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final int minZ = cz - offset;
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final int maxX = cx + offset;
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final int maxZ = cz + offset;
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int closest = Integer.MAX_VALUE;
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int chosen_x = cx;
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int chosen_z = cz;
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for (int z = minZ; z <= maxZ; z++) {
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if (cr.hasBeacon(minX, z)) {
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final int closeness = CompassService.this.dist(cx, cz, minX, z);
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if (closeness < closest) {
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closest = closeness;
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chosen_x = minX;
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chosen_z = z;
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}
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}
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if (cr.hasBeacon(maxX, z)) {
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final int closeness = CompassService.this.dist(cx, cz, maxX, z);
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if (closeness < closest) {
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closest = closeness;
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chosen_x = maxX;
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chosen_z = z;
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}
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}
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}
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for (int x = minX + 1; x < maxX; x++) {
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if (cr.hasBeacon(x, minZ)) {
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final int closeness = CompassService.this.dist(cx, cz, x, minZ);
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if (closeness < closest) {
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closest = closeness;
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chosen_x = x;
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chosen_z = minZ;
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}
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}
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if (cr.hasBeacon(x, maxZ)) {
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final int closeness = CompassService.this.dist(cx, cz, x, maxZ);
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if (closeness < closest) {
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closest = closeness;
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chosen_x = x;
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chosen_z = maxZ;
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}
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}
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}
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if (closest < Integer.MAX_VALUE) {
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this.callback.calculatedDirection(true, false, CompassService.this.rad(cx, cz, chosen_x, chosen_z),
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CompassService.this.dist(cx, cz, chosen_x, chosen_z));
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if (CompassService.this.jobSize() < 2) {
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CompassService.this.cleanUp();
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}
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return;
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}
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}
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// didn't find shit...
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this.callback.calculatedDirection(false, true, -999, 999);
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if (CompassService.this.jobSize() < 2) {
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CompassService.this.cleanUp();
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}
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}
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}
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}
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