src/main/java/com/irtimaled/bbor/client/interop/SpawnableBlocksHelper.java

   1 package com.irtimaled.bbor.client.interop;
   2
   3 import com.irtimaled.bbor.common.models.Coords;
   4 import net.minecraft.block.Block;
   5 import net.minecraft.block.BlockState;
   6 import net.minecraft.client.MinecraftClient;
   7 import net.minecraft.entity.EntityType;
   8 import net.minecraft.entity.SpawnGroup;
   9 import net.minecraft.tag.BlockTags;
  10 import net.minecraft.util.math.BlockPos;
  11 import net.minecraft.util.math.Direction;
  12 import net.minecraft.util.shape.VoxelShape;
  13 import net.minecraft.world.LightType;
  14 import net.minecraft.world.World;
  15 import net.minecraft.world.biome.Biome;
  16
  17 public class SpawnableBlocksHelper {
  18     private static final EntityType entityType = EntityType.Builder.create(SpawnGroup.MONSTER)
  19             .setDimensions(0f, 0f).disableSaving().build(null);
  20
  21     public static void findSpawnableBlocks(Coords coords, int width, int height, BlockProcessor blockProcessor) {
  22         int blockX = coords.getX();
  23         int minX = blockX - width;
  24         int maxX = blockX + width + 1;
  25
  26         int blockZ = coords.getZ();
  27         int minZ = blockZ - width;
  28         int maxZ = blockZ + width + 1;
  29
  30         int blockY = coords.getY();
  31         int minY = Math.max(1, blockY - height);
  32         int maxY = Math.min(255, blockY + height);
  33
  34         World world = MinecraftClient.getInstance().world;
  35         for (int x = minX; x < maxX; x++) {
  36             for (int z = minZ; z < maxZ; z++) {
  37                 BlockState upperBlockState = world.getBlockState(new BlockPos(x, minY - 1, z));
  38                 for (int y = Math.max(1, minY); y < maxY; y++) {
  39                     BlockState spawnBlockState = upperBlockState;
  40                     BlockPos pos = new BlockPos(x, y, z);
  41                     upperBlockState = world.getBlockState(pos);
  42                     if (isSpawnable(world, pos, spawnBlockState, upperBlockState)) {
  43                         blockProcessor.process(pos);
  44                     }
  45                 }
  46             }
  47         }
  48     }
  49
  50     static boolean isSpawnable(World world, BlockPos pos, BlockState spawnBlockState, BlockState upperBlockState) {
  51         VoxelShape collisionShape = upperBlockState.getCollisionShape(world, pos);
  52         Biome biome = world.getBiome(pos);
  53         boolean isNether = biome.getCategory() == Biome.Category.NETHER;
  54         return biome.getCategory() != Biome.Category.MUSHROOM &&
  55                 spawnBlockState.allowsSpawning(world, pos.down(), isNether ? EntityType.ZOMBIFIED_PIGLIN : entityType) &&
  56                 !Block.isFaceFullSquare(collisionShape, Direction.UP) &&
  57                 !upperBlockState.emitsRedstonePower() &&
  58                 !upperBlockState.isIn(BlockTags.RAILS) &&
  59                 collisionShape.getMax(Direction.Axis.Y) <= 0 &&
  60                 upperBlockState.getFluidState().isEmpty() &&
  61                 (isNether || world.getLightLevel(LightType.BLOCK, pos) <= 7);
  62     }
  63 }