Code/net/minecraft/world/level/dimension/end/DragonRespawnAnimation.java

package net.minecraft.world.level.dimension.end;

import com.google.common.collect.ImmutableList;
import java.util.List;
import net.minecraft.core.BlockPos;
import net.minecraft.server.level.ServerLevel;
import net.minecraft.util.RandomSource;
import net.minecraft.world.entity.boss.enderdragon.EndCrystal;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.levelgen.feature.Feature;
import net.minecraft.world.level.levelgen.feature.SpikeFeature;
import net.minecraft.world.level.levelgen.feature.configurations.SpikeConfiguration;

public enum DragonRespawnAnimation {
    START {
        @Override
        public void tick(ServerLevel p_64017_, EndDragonFight p_64018_, List<EndCrystal> p_64019_, int p_64020_, BlockPos p_64021_) {
            BlockPos blockpos = new BlockPos(0, 128, 0);

            for (EndCrystal endcrystal : p_64019_) {
                endcrystal.setBeamTarget(blockpos);
            }

            p_64018_.setRespawnStage(PREPARING_TO_SUMMON_PILLARS);
        }
    },
    PREPARING_TO_SUMMON_PILLARS {
        @Override
        public void tick(ServerLevel p_64026_, EndDragonFight p_64027_, List<EndCrystal> p_64028_, int p_64029_, BlockPos p_64030_) {
            if (p_64029_ < 100) {
                if (p_64029_ == 0 || p_64029_ == 50 || p_64029_ == 51 || p_64029_ == 52 || p_64029_ >= 95) {
                    p_64026_.levelEvent(3001, new BlockPos(0, 128, 0), 0);
                }
            } else {
                p_64027_.setRespawnStage(SUMMONING_PILLARS);
            }
        }
    },
    SUMMONING_PILLARS {
        @Override
        public void tick(ServerLevel p_64035_, EndDragonFight p_64036_, List<EndCrystal> p_64037_, int p_64038_, BlockPos p_64039_) {
            int i = 40;
            boolean flag = p_64038_ % 40 == 0;
            boolean flag1 = p_64038_ % 40 == 39;
            if (flag || flag1) {
                List<SpikeFeature.EndSpike> list = SpikeFeature.getSpikesForLevel(p_64035_);
                int j = p_64038_ / 40;
                if (j < list.size()) {
                    SpikeFeature.EndSpike spikefeature$endspike = list.get(j);
                    if (flag) {
                        for (EndCrystal endcrystal : p_64037_) {
                            endcrystal.setBeamTarget(
                                new BlockPos(spikefeature$endspike.getCenterX(), spikefeature$endspike.getHeight() + 1, spikefeature$endspike.getCenterZ())
                            );
                        }
                    } else {
                        int k = 10;

                        for (BlockPos blockpos : BlockPos.betweenClosed(
                            new BlockPos(spikefeature$endspike.getCenterX() - 10, spikefeature$endspike.getHeight() - 10, spikefeature$endspike.getCenterZ() - 10),
                            new BlockPos(spikefeature$endspike.getCenterX() + 10, spikefeature$endspike.getHeight() + 10, spikefeature$endspike.getCenterZ() + 10)
                        )) {
                            p_64035_.removeBlock(blockpos, false);
                        }

                        p_64035_.explode(
                            null,
                            spikefeature$endspike.getCenterX() + 0.5F,
                            spikefeature$endspike.getHeight(),
                            spikefeature$endspike.getCenterZ() + 0.5F,
                            5.0F,
                            Level.ExplosionInteraction.BLOCK
                        );
                        SpikeConfiguration spikeconfiguration = new SpikeConfiguration(true, ImmutableList.of(spikefeature$endspike), new BlockPos(0, 128, 0));
                        Feature.END_SPIKE
                            .place(
                                spikeconfiguration,
                                p_64035_,
                                p_64035_.getChunkSource().getGenerator(),
                                RandomSource.create(),
                                new BlockPos(spikefeature$endspike.getCenterX(), 45, spikefeature$endspike.getCenterZ())
                            );
                    }
                } else if (flag) {
                    p_64036_.setRespawnStage(SUMMONING_DRAGON);
                }
            }
        }
    },
    SUMMONING_DRAGON {
        @Override
        public void tick(ServerLevel p_64044_, EndDragonFight p_64045_, List<EndCrystal> p_64046_, int p_64047_, BlockPos p_64048_) {
            if (p_64047_ >= 100) {
                p_64045_.setRespawnStage(END);
                p_64045_.resetSpikeCrystals();

                for (EndCrystal endcrystal : p_64046_) {
                    endcrystal.setBeamTarget(null);
                    p_64044_.explode(endcrystal, endcrystal.getX(), endcrystal.getY(), endcrystal.getZ(), 6.0F, Level.ExplosionInteraction.NONE);
                    endcrystal.discard();
                }
            } else if (p_64047_ >= 80) {
                p_64044_.levelEvent(3001, new BlockPos(0, 128, 0), 0);
            } else if (p_64047_ == 0) {
                for (EndCrystal endcrystal1 : p_64046_) {
                    endcrystal1.setBeamTarget(new BlockPos(0, 128, 0));
                }
            } else if (p_64047_ < 5) {
                p_64044_.levelEvent(3001, new BlockPos(0, 128, 0), 0);
            }
        }
    },
    END {
        @Override
        public void tick(ServerLevel p_64053_, EndDragonFight p_64054_, List<EndCrystal> p_64055_, int p_64056_, BlockPos p_64057_) {
        }
    };

    public abstract void tick(ServerLevel p_64005_, EndDragonFight p_64006_, List<EndCrystal> p_64007_, int p_64008_, BlockPos p_64009_);
}