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 com.irtimaled.bbor.mixin.access.IBiome;
   5 import net.minecraft.block.Block;
   6 import net.minecraft.block.BlockState;
   7 import net.minecraft.client.MinecraftClient;
   8 import net.minecraft.entity.EntityType;
   9 import net.minecraft.entity.SpawnGroup;
  10 import net.minecraft.tag.BlockTags;
  11 import net.minecraft.util.math.BlockPos;
  12 import net.minecraft.util.math.Direction;
  13 import net.minecraft.util.shape.VoxelShape;
  14 import net.minecraft.world.LightType;
  15 import net.minecraft.world.World;
  16 import net.minecraft.world.biome.Biome;
  17
  18 public class SpawnableBlocksHelper {
  19     private static final EntityType entityType = EntityType.Builder.create(SpawnGroup.MONSTER)
  20             .setDimensions(0f, 0f).disableSaving().build(null);
  21
  22     public static void findSpawnableBlocks(Coords coords, int width, int height, BlockProcessor blockProcessor) {
  23         int blockX = coords.getX();
  24         int minX = blockX - width;
  25         int maxX = blockX + width + 1;
  26
  27         int blockZ = coords.getZ();
  28         int minZ = blockZ - width;
  29         int maxZ = blockZ + width + 1;
  30
  31         int blockY = coords.getY();
  32         int minY = Math.max(1, blockY - height);
  33         int maxY = Math.min(255, blockY + height);
  34
  35         World world = MinecraftClient.getInstance().world;
  36         for (int x = minX; x < maxX; x++) {
  37             for (int z = minZ; z < maxZ; z++) {
  38                 BlockState upperBlockState = world.getBlockState(new BlockPos(x, minY - 1, z));
  39                 for (int y = Math.max(1, minY); y < maxY; y++) {
  40                     BlockState spawnBlockState = upperBlockState;
  41                     BlockPos pos = new BlockPos(x, y, z);
  42                     upperBlockState = world.getBlockState(pos);
  43                     if (isSpawnable(world, pos, spawnBlockState, upperBlockState)) {
  44                         blockProcessor.process(pos);
  45                     }
  46                 }
  47             }
  48         }
  49     }
  50
  51     static boolean isSpawnable(World world, BlockPos pos, BlockState spawnBlockState, BlockState upperBlockState) {
  52         VoxelShape collisionShape = upperBlockState.getCollisionShape(world, pos);
  53         Biome biome = world.getBiome(pos).value();
  54         boolean isNether = ((IBiome) biome).bbor$getCategory() == Biome.Category.NETHER;
  55         return ((IBiome) biome).bbor$getCategory() != Biome.Category.MUSHROOM &&
  56                 spawnBlockState.allowsSpawning(world, pos.down(), isNether ? EntityType.ZOMBIFIED_PIGLIN : entityType) &&
  57                 !Block.isFaceFullSquare(collisionShape, Direction.UP) &&
  58                 !upperBlockState.emitsRedstonePower() &&
  59                 !upperBlockState.isIn(BlockTags.RAILS) &&
  60                 collisionShape.getMax(Direction.Axis.Y) <= 0 &&
  61                 upperBlockState.getFluidState().isEmpty() &&
  62                 (isNether || world.getLightLevel(LightType.BLOCK, pos) <= 7);
  63     }
  64 }