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.Minecraft;
   7 import net.minecraft.entity.EntityClassification;
   8 import net.minecraft.entity.EntityType;
   9 import net.minecraft.tags.BlockTags;
  10 import net.minecraft.util.Direction;
  11 import net.minecraft.util.math.BlockPos;
  12 import net.minecraft.util.math.shapes.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(EntityClassification.MONSTER)
  19             .size(0f, 0f).disableSerialization().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 = Minecraft.getInstance().world;
  35         for (int x = minX; x < maxX; x++) {
  36             for (int z = minZ; z < maxZ; z++) {
  37                 if (isBiomeHostileSpawnProof(world, new BlockPos(x, 1, z))) continue;
  38
  39                 BlockState upperBlockState = world.getBlockState(new BlockPos(x, minY - 1, z));
  40                 for (int y = Math.max(1, minY); y < maxY; y++) {
  41                     BlockState spawnBlockState = upperBlockState;
  42                     BlockPos pos = new BlockPos(x, y, z);
  43                     upperBlockState = world.getBlockState(pos);
  44                     if (isSpawnable(world, pos, spawnBlockState, upperBlockState)) {
  45                         blockProcessor.process(pos);
  46                     }
  47                 }
  48             }
  49         }
  50     }
  51
  52     static boolean isBiomeHostileSpawnProof(World world, BlockPos pos) {
  53         Biome biome = world.getBiome(pos);
  54         return biome.getSpawningChance() == 0 ||
  55                 biome.getSpawns(EntityClassification.MONSTER).isEmpty();
  56     }
  57
  58     static boolean isSpawnable(World world, BlockPos pos, BlockState spawnBlockState, BlockState upperBlockState) {
  59         VoxelShape collisionShape = upperBlockState.getCollisionShape(world, pos);
  60         boolean isNether = world.dimension.isNether();
  61         return spawnBlockState.canEntitySpawn(world, pos.down(), isNether ? EntityType.ZOMBIE_PIGMAN : entityType) &&
  62                 !Block.doesSideFillSquare(collisionShape, Direction.UP) &&
  63                 !upperBlockState.canProvidePower() &&
  64                 !upperBlockState.isIn(BlockTags.RAILS) &&
  65                 collisionShape.getEnd(Direction.Axis.Y) <= 0 &&
  66                 upperBlockState.getFluidState().isEmpty() &&
  67                 (isNether || world.getLightFor(LightType.BLOCK, pos) <= 7);
  68     }
  69 }