84 lines
2.6 KiB
Java
84 lines
2.6 KiB
Java
package com.terraforged.core.region;
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import com.terraforged.core.region.chunk.ChunkReader;
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import com.terraforged.core.util.Cache;
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import com.terraforged.core.world.heightmap.RegionExtent;
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import me.dags.noise.util.NoiseUtil;
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import java.util.concurrent.CompletableFuture;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.TimeUnit;
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public class RegionCache implements RegionExtent {
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private final boolean queuing;
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private final RegionGenerator renderer;
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private final Cache<Long, CompletableFuture<Region>> cache;
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private Region cachedRegion = null;
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public RegionCache(boolean queueNeighbours, RegionGenerator renderer) {
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this.renderer = renderer;
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this.queuing = queueNeighbours;
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this.cache = new Cache<>(180, 60, TimeUnit.SECONDS, () -> new ConcurrentHashMap<>());
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}
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@Override
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public int chunkToRegion(int coord) {
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return renderer.chunkToRegion(coord);
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}
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@Override
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public CompletableFuture<Region> getRegionAsync(int regionX, int regionZ) {
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long id = NoiseUtil.seed(regionX, regionZ);
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CompletableFuture<Region> future = cache.get(id);
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if (future == null) {
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future = renderer.getRegionAsync(regionX, regionZ);
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cache.put(id, future);
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}
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return future;
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}
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@Override
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public ChunkReader getChunk(int chunkX, int chunkZ) {
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int regionX = renderer.chunkToRegion(chunkX);
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int regionZ = renderer.chunkToRegion(chunkZ);
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Region region = getRegion(regionX, regionZ);
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return region.getChunk(chunkX, chunkZ);
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}
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@Override
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public Region getRegion(int regionX, int regionZ) {
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if (cachedRegion != null && regionX == cachedRegion.getRegionX() && regionZ == cachedRegion.getRegionZ()) {
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return cachedRegion;
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}
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long id = NoiseUtil.seed(regionX, regionZ);
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CompletableFuture<Region> futureRegion = cache.get(id);
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if (futureRegion == null) {
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cachedRegion = renderer.generateRegion(regionX, regionZ);
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cache.put(id, CompletableFuture.completedFuture(cachedRegion));
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} else {
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cachedRegion = futureRegion.join();
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}
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if (queuing) {
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queueNeighbours(regionX, regionZ);
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}
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return cachedRegion;
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}
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private void queueNeighbours(int regionX, int regionZ) {
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for (int z = -1; z <= 1; z++) {
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for (int x = -1; x <= 1; x++){
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if (x == 0 && z == 0) {
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continue;
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}
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getRegionAsync(regionX + x, regionZ + z);
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}
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}
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}
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}
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