73 lines
2.7 KiB
Java
73 lines
2.7 KiB
Java
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package net.minecraft.client.renderer.chunk;
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import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
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import it.unimi.dsi.fastutil.longs.Long2ObjectOpenHashMap;
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import javax.annotation.Nullable;
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import net.minecraft.core.SectionPos;
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import net.minecraft.world.level.ChunkPos;
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import net.minecraft.world.level.Level;
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import net.minecraft.world.level.chunk.LevelChunk;
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import net.minecraftforge.api.distmarker.Dist;
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import net.minecraftforge.api.distmarker.OnlyIn;
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@OnlyIn(Dist.CLIENT)
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public class RenderRegionCache {
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private final Long2ObjectMap<RenderRegionCache.ChunkInfo> chunkInfoCache = new Long2ObjectOpenHashMap<>();
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@Nullable
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public RenderChunkRegion createRegion(Level p_200466_, SectionPos p_343190_) {
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RenderRegionCache.ChunkInfo renderregioncache$chunkinfo = this.getChunkInfo(p_200466_, p_343190_.x(), p_343190_.z());
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if (renderregioncache$chunkinfo.chunk().isSectionEmpty(p_343190_.y())) {
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return null;
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} else {
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int i = p_343190_.x() - 1;
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int j = p_343190_.z() - 1;
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int k = p_343190_.x() + 1;
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int l = p_343190_.z() + 1;
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RenderChunk[] arenderchunk = new RenderChunk[9];
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for (int i1 = j; i1 <= l; i1++) {
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for (int j1 = i; j1 <= k; j1++) {
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int k1 = RenderChunkRegion.index(i, j, j1, i1);
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RenderRegionCache.ChunkInfo renderregioncache$chunkinfo1 = j1 == p_343190_.x() && i1 == p_343190_.z()
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? renderregioncache$chunkinfo
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: this.getChunkInfo(p_200466_, j1, i1);
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arenderchunk[k1] = renderregioncache$chunkinfo1.renderChunk();
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}
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}
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return new RenderChunkRegion(p_200466_, i, j, arenderchunk);
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}
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}
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private RenderRegionCache.ChunkInfo getChunkInfo(Level p_344202_, int p_345234_, int p_342074_) {
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return this.chunkInfoCache
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.computeIfAbsent(
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ChunkPos.asLong(p_345234_, p_342074_),
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p_200464_ -> new RenderRegionCache.ChunkInfo(p_344202_.getChunk(ChunkPos.getX(p_200464_), ChunkPos.getZ(p_200464_)))
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);
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}
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@OnlyIn(Dist.CLIENT)
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static final class ChunkInfo {
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private final LevelChunk chunk;
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@Nullable
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private RenderChunk renderChunk;
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ChunkInfo(LevelChunk p_200479_) {
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this.chunk = p_200479_;
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}
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public LevelChunk chunk() {
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return this.chunk;
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}
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public RenderChunk renderChunk() {
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if (this.renderChunk == null) {
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this.renderChunk = new RenderChunk(this.chunk);
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}
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return this.renderChunk;
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}
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}
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}
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