minecraft-src/net/minecraft/world/level/levelgen/feature/trunkplacers/CherryTrunkPlacer.java

package net.minecraft.world.level.levelgen.feature.trunkplacers;

import com.mojang.serialization.Codec;
import com.mojang.serialization.DataResult;
import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import java.util.ArrayList;
import java.util.List;
import java.util.function.BiConsumer;
import java.util.function.Function;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.util.RandomSource;
import net.minecraft.util.valueproviders.IntProvider;
import net.minecraft.util.valueproviders.UniformInt;
import net.minecraft.world.level.LevelSimulatedReader;
import net.minecraft.world.level.block.RotatedPillarBlock;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.levelgen.feature.configurations.TreeConfiguration;
import net.minecraft.world.level.levelgen.feature.foliageplacers.FoliagePlacer;

public class CherryTrunkPlacer extends TrunkPlacer {
	private static final Codec<UniformInt> BRANCH_START_CODEC = UniformInt.CODEC
		.codec()
		.validate(
			uniformInt -> uniformInt.getMaxValue() - uniformInt.getMinValue() < 1
				? DataResult.error(() -> "Need at least 2 blocks variation for the branch starts to fit both branches")
				: DataResult.success(uniformInt)
		);
	public static final MapCodec<CherryTrunkPlacer> CODEC = RecordCodecBuilder.mapCodec(
		instance -> trunkPlacerParts(instance)
			.<IntProvider, IntProvider, UniformInt, IntProvider>and(
				instance.group(
					IntProvider.codec(1, 3).fieldOf("branch_count").forGetter(cherryTrunkPlacer -> cherryTrunkPlacer.branchCount),
					IntProvider.codec(2, 16).fieldOf("branch_horizontal_length").forGetter(cherryTrunkPlacer -> cherryTrunkPlacer.branchHorizontalLength),
					IntProvider.validateCodec(-16, 0, BRANCH_START_CODEC)
						.fieldOf("branch_start_offset_from_top")
						.forGetter(cherryTrunkPlacer -> cherryTrunkPlacer.branchStartOffsetFromTop),
					IntProvider.codec(-16, 16).fieldOf("branch_end_offset_from_top").forGetter(cherryTrunkPlacer -> cherryTrunkPlacer.branchEndOffsetFromTop)
				)
			)
			.apply(instance, CherryTrunkPlacer::new)
	);
	private final IntProvider branchCount;
	private final IntProvider branchHorizontalLength;
	private final UniformInt branchStartOffsetFromTop;
	private final UniformInt secondBranchStartOffsetFromTop;
	private final IntProvider branchEndOffsetFromTop;

	public CherryTrunkPlacer(
		int baseHeight,
		int heightRandA,
		int heightRandB,
		IntProvider branchCount,
		IntProvider branchHorizontalLength,
		UniformInt branchStartOffsetFromTop,
		IntProvider branchEndOffsetFromTop
	) {
		super(baseHeight, heightRandA, heightRandB);
		this.branchCount = branchCount;
		this.branchHorizontalLength = branchHorizontalLength;
		this.branchStartOffsetFromTop = branchStartOffsetFromTop;
		this.secondBranchStartOffsetFromTop = UniformInt.of(branchStartOffsetFromTop.getMinValue(), branchStartOffsetFromTop.getMaxValue() - 1);
		this.branchEndOffsetFromTop = branchEndOffsetFromTop;
	}

	@Override
	protected TrunkPlacerType<?> type() {
		return TrunkPlacerType.CHERRY_TRUNK_PLACER;
	}

	@Override
	public List<FoliagePlacer.FoliageAttachment> placeTrunk(
		LevelSimulatedReader level, BiConsumer<BlockPos, BlockState> blockSetter, RandomSource random, int freeTreeHeight, BlockPos pos, TreeConfiguration config
	) {
		setDirtAt(level, blockSetter, random, pos.below(), config);
		int i = Math.max(0, freeTreeHeight - 1 + this.branchStartOffsetFromTop.sample(random));
		int j = Math.max(0, freeTreeHeight - 1 + this.secondBranchStartOffsetFromTop.sample(random));
		if (j >= i) {
			j++;
		}

		int k = this.branchCount.sample(random);
		boolean bl = k == 3;
		boolean bl2 = k >= 2;
		int l;
		if (bl) {
			l = freeTreeHeight;
		} else if (bl2) {
			l = Math.max(i, j) + 1;
		} else {
			l = i + 1;
		}

		for (int m = 0; m < l; m++) {
			this.placeLog(level, blockSetter, random, pos.above(m), config);
		}

		List<FoliagePlacer.FoliageAttachment> list = new ArrayList();
		if (bl) {
			list.add(new FoliagePlacer.FoliageAttachment(pos.above(l), 0, false));
		}

		BlockPos.MutableBlockPos mutableBlockPos = new BlockPos.MutableBlockPos();
		Direction direction = Direction.Plane.HORIZONTAL.getRandomDirection(random);
		Function<BlockState, BlockState> function = blockState -> blockState.trySetValue(RotatedPillarBlock.AXIS, direction.getAxis());
		list.add(this.generateBranch(level, blockSetter, random, freeTreeHeight, pos, config, function, direction, i, i < l - 1, mutableBlockPos));
		if (bl2) {
			list.add(this.generateBranch(level, blockSetter, random, freeTreeHeight, pos, config, function, direction.getOpposite(), j, j < l - 1, mutableBlockPos));
		}

		return list;
	}

	private FoliagePlacer.FoliageAttachment generateBranch(
		LevelSimulatedReader level,
		BiConsumer<BlockPos, BlockState> blockSetter,
		RandomSource random,
		int freeTreeHeight,
		BlockPos pos,
		TreeConfiguration config,
		Function<BlockState, BlockState> propertySetter,
		Direction direction,
		int secondBranchStartOffsetFromTop,
		boolean doubleBranch,
		BlockPos.MutableBlockPos currentPos
	) {
		currentPos.set(pos).move(Direction.UP, secondBranchStartOffsetFromTop);
		int i = freeTreeHeight - 1 + this.branchEndOffsetFromTop.sample(random);
		boolean bl = doubleBranch || i < secondBranchStartOffsetFromTop;
		int j = this.branchHorizontalLength.sample(random) + (bl ? 1 : 0);
		BlockPos blockPos = pos.relative(direction, j).above(i);
		int k = bl ? 2 : 1;

		for (int l = 0; l < k; l++) {
			this.placeLog(level, blockSetter, random, currentPos.move(direction), config, propertySetter);
		}

		Direction direction2 = blockPos.getY() > currentPos.getY() ? Direction.UP : Direction.DOWN;

		while (true) {
			int m = currentPos.distManhattan(blockPos);
			if (m == 0) {
				return new FoliagePlacer.FoliageAttachment(blockPos.above(), 0, false);
			}

			float f = (float)Math.abs(blockPos.getY() - currentPos.getY()) / m;
			boolean bl2 = random.nextFloat() < f;
			currentPos.move(bl2 ? direction2 : direction);
			this.placeLog(level, blockSetter, random, currentPos, config, bl2 ? Function.identity() : propertySetter);
		}
	}
}