88 lines
2.7 KiB
Java
88 lines
2.7 KiB
Java
package com.terraforged.mod.feature.context;
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import com.terraforged.core.cell.Cell;
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import com.terraforged.core.concurrent.Resource;
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import com.terraforged.core.concurrent.cache.SafeCloseable;
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import com.terraforged.core.concurrent.pool.ObjectPool;
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import com.terraforged.core.tile.chunk.ChunkReader;
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import com.terraforged.mod.chunk.TerraChunkGenerator;
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import com.terraforged.mod.chunk.fix.RegionDelegate;
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import com.terraforged.world.heightmap.Levels;
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import net.minecraft.util.math.BlockPos;
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import net.minecraft.world.IWorld;
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import net.minecraft.world.chunk.IChunk;
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import net.minecraft.world.gen.ChunkGenerator;
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import net.minecraft.world.gen.WorldGenRegion;
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import java.util.Random;
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public class ChanceContext implements SafeCloseable {
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private static final ObjectPool<ChanceContext> pool = new ObjectPool<>(10, ChanceContext::new);
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public IChunk chunk;
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public Levels levels;
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public ChunkReader reader;
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public Cell cell = Cell.empty();
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private int length;
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private float total = 0F;
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private float[] buffer;
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@Override
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public void close() {
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if (reader != null) {
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reader.close();
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reader = null;
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}
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}
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void setPos(BlockPos pos) {
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cell = reader.getCell(pos.getX(), pos.getZ());
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}
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void init(int size) {
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total = 0F;
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length = 0;
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if (buffer == null || buffer.length < size) {
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buffer = new float[size];
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}
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}
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void record(int index, float chance) {
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buffer[index] = chance;
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total += chance;
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length++;
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}
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int nextIndex(Random random) {
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if (total == 0) {
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return -1;
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}
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float value = 0F;
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float chance = total * random.nextFloat();
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for (int i = 0; i < length; i++) {
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value += buffer[i];
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if (value >= chance) {
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return i;
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}
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}
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return -1;
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}
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public static Resource<ChanceContext> pooled(IWorld world, ChunkGenerator<?> generator) {
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if (generator instanceof TerraChunkGenerator && world instanceof RegionDelegate) {
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TerraChunkGenerator terraGenerator = (TerraChunkGenerator) generator;
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Levels levels = terraGenerator.getContext().levels;
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WorldGenRegion region = ((RegionDelegate) world).getRegion();
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IChunk chunk = region.getChunk(region.getMainChunkX(), region.getMainChunkZ());
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Resource<ChanceContext> item = pool.get();
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item.get().chunk = chunk;
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item.get().levels = levels;
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item.get().reader = terraGenerator.getChunkReader(chunk.getPos().x, chunk.getPos().z);
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return item;
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}
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return null;
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}
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}
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