Code/net/minecraft/world/level/levelgen/feature/trunkplacers/UpwardsBranchingTrunkPlacer.java

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

import com.google.common.collect.Lists;
import com.mojang.serialization.Codec;
import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import com.mojang.serialization.codecs.RecordCodecBuilder.Instance;
import java.util.List;
import java.util.function.BiConsumer;
import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.HolderSet;
import net.minecraft.core.RegistryCodecs;
import net.minecraft.core.registries.Registries;
import net.minecraft.util.RandomSource;
import net.minecraft.util.valueproviders.IntProvider;
import net.minecraft.world.level.LevelSimulatedReader;
import net.minecraft.world.level.block.Block;
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 UpwardsBranchingTrunkPlacer extends TrunkPlacer {
    public static final MapCodec<UpwardsBranchingTrunkPlacer> CODEC = RecordCodecBuilder.mapCodec(
        p_259008_ -> trunkPlacerParts(p_259008_)
            .and(
                p_259008_.group(
                    IntProvider.POSITIVE_CODEC.fieldOf("extra_branch_steps").forGetter(p_226242_ -> p_226242_.extraBranchSteps),
                    Codec.floatRange(0.0F, 1.0F).fieldOf("place_branch_per_log_probability").forGetter(p_226240_ -> p_226240_.placeBranchPerLogProbability),
                    IntProvider.NON_NEGATIVE_CODEC.fieldOf("extra_branch_length").forGetter(p_226238_ -> p_226238_.extraBranchLength),
                    RegistryCodecs.homogeneousList(Registries.BLOCK).fieldOf("can_grow_through").forGetter(p_226234_ -> p_226234_.canGrowThrough)
                )
            )
            .apply(p_259008_, UpwardsBranchingTrunkPlacer::new)
    );
    private final IntProvider extraBranchSteps;
    private final float placeBranchPerLogProbability;
    private final IntProvider extraBranchLength;
    private final HolderSet<Block> canGrowThrough;

    public UpwardsBranchingTrunkPlacer(
        int p_226201_, int p_226202_, int p_226203_, IntProvider p_226204_, float p_226205_, IntProvider p_226206_, HolderSet<Block> p_226207_
    ) {
        super(p_226201_, p_226202_, p_226203_);
        this.extraBranchSteps = p_226204_;
        this.placeBranchPerLogProbability = p_226205_;
        this.extraBranchLength = p_226206_;
        this.canGrowThrough = p_226207_;
    }

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

    @Override
    public List<FoliagePlacer.FoliageAttachment> placeTrunk(
        LevelSimulatedReader p_226225_,
        BiConsumer<BlockPos, BlockState> p_226226_,
        RandomSource p_226227_,
        int p_226228_,
        BlockPos p_226229_,
        TreeConfiguration p_226230_
    ) {
        List<FoliagePlacer.FoliageAttachment> list = Lists.newArrayList();
        BlockPos.MutableBlockPos blockpos$mutableblockpos = new BlockPos.MutableBlockPos();

        for (int i = 0; i < p_226228_; i++) {
            int j = p_226229_.getY() + i;
            if (this.placeLog(p_226225_, p_226226_, p_226227_, blockpos$mutableblockpos.set(p_226229_.getX(), j, p_226229_.getZ()), p_226230_)
                && i < p_226228_ - 1
                && p_226227_.nextFloat() < this.placeBranchPerLogProbability) {
                Direction direction = Direction.Plane.HORIZONTAL.getRandomDirection(p_226227_);
                int k = this.extraBranchLength.sample(p_226227_);
                int l = Math.max(0, k - this.extraBranchLength.sample(p_226227_) - 1);
                int i1 = this.extraBranchSteps.sample(p_226227_);
                this.placeBranch(p_226225_, p_226226_, p_226227_, p_226228_, p_226230_, list, blockpos$mutableblockpos, j, direction, l, i1);
            }

            if (i == p_226228_ - 1) {
                list.add(new FoliagePlacer.FoliageAttachment(blockpos$mutableblockpos.set(p_226229_.getX(), j + 1, p_226229_.getZ()), 0, false));
            }
        }

        return list;
    }

    private void placeBranch(
        LevelSimulatedReader p_226213_,
        BiConsumer<BlockPos, BlockState> p_226214_,
        RandomSource p_226215_,
        int p_226216_,
        TreeConfiguration p_226217_,
        List<FoliagePlacer.FoliageAttachment> p_226218_,
        BlockPos.MutableBlockPos p_226219_,
        int p_226220_,
        Direction p_226221_,
        int p_226222_,
        int p_226223_
    ) {
        int i = p_226220_ + p_226222_;
        int j = p_226219_.getX();
        int k = p_226219_.getZ();
        int l = p_226222_;

        while (l < p_226216_ && p_226223_ > 0) {
            if (l >= 1) {
                int i1 = p_226220_ + l;
                j += p_226221_.getStepX();
                k += p_226221_.getStepZ();
                i = i1;
                if (this.placeLog(p_226213_, p_226214_, p_226215_, p_226219_.set(j, i1, k), p_226217_)) {
                    i = i1 + 1;
                }

                p_226218_.add(new FoliagePlacer.FoliageAttachment(p_226219_.immutable(), 0, false));
            }

            l++;
            p_226223_--;
        }

        if (i - p_226220_ > 1) {
            BlockPos blockpos = new BlockPos(j, i, k);
            p_226218_.add(new FoliagePlacer.FoliageAttachment(blockpos, 0, false));
            p_226218_.add(new FoliagePlacer.FoliageAttachment(blockpos.below(2), 0, false));
        }
    }

    @Override
    protected boolean validTreePos(LevelSimulatedReader p_226210_, BlockPos p_226211_) {
        return super.validTreePos(p_226210_, p_226211_) || p_226210_.isStateAtPosition(p_226211_, p_226232_ -> p_226232_.is(this.canGrowThrough));
    }
}