Stalactites

src/main/java/ru/betterend/blocks/basis/StalactiteBlock.java

@@ -0,0 +1,133 @@
+package ru.betterend.blocks.basis;
+
+import net.fabricmc.fabric.api.object.builder.v1.block.FabricBlockSettings;
+import net.minecraft.block.Block;
+import net.minecraft.block.BlockState;
+import net.minecraft.block.Blocks;
+import net.minecraft.block.ShapeContext;
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.state.StateManager;
+import net.minecraft.state.property.IntProperty;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.BlockPos.Mutable;
+import net.minecraft.util.math.Direction;
+import net.minecraft.util.registry.Registry;
+import net.minecraft.util.shape.VoxelShape;
+import net.minecraft.world.BlockView;
+import net.minecraft.world.World;
+import net.minecraft.world.WorldAccess;
+import net.minecraft.world.WorldView;
+import ru.betterend.blocks.BlockProperties;
+import ru.betterend.patterns.Patterns;
+
+public class StalactiteBlock extends BlockBaseNotFull {
+	public static final IntProperty SIZE = BlockProperties.SIZE;
+	private static final Mutable POS = new Mutable();
+	private static final VoxelShape[] SHAPES;
+	private final Block source;
+
+	public StalactiteBlock(Block source) {
+		super(FabricBlockSettings.copy(source).nonOpaque());
+		this.setDefaultState(getStateManager().getDefaultState().with(SIZE, 0));
+		this.source = source;
+	}
+
+	@Override
+	protected void appendProperties(StateManager.Builder<Block, BlockState> stateManager) {
+		stateManager.add(SIZE);
+	}
+
+	@Override
+	public VoxelShape getOutlineShape(BlockState state, BlockView view, BlockPos pos, ShapeContext ePos) {
+		return SHAPES[state.get(SIZE)];
+	}
+
+	@Override
+	public void onPlaced(World world, BlockPos pos, BlockState state, LivingEntity placer, ItemStack itemStack) {
+		if (world.getBlockState(pos.down()).getBlock() instanceof StalactiteBlock) {
+			POS.setX(pos.getX());
+			POS.setZ(pos.getZ());
+			for (int i = 1; i < 8; i++) {
+				POS.setY(pos.getY() - i);
+				if (world.getBlockState(POS).getBlock() instanceof StalactiteBlock) {
+					BlockState state2 = world.getBlockState(POS);
+					int size = state2.get(SIZE);
+					if (size < i) {
+						world.setBlockState(POS, state2.with(SIZE, i));
+					}
+					else {
+						break;
+					}
+				}
+				else {
+					break;
+				}
+			}
+		}
+		if (world.getBlockState(pos.up()).getBlock() instanceof StalactiteBlock) {
+			POS.setX(pos.getX());
+			POS.setZ(pos.getZ());
+			for (int i = 1; i < 8; i++) {
+				POS.setY(pos.getY() + i);
+				if (world.getBlockState(POS).getBlock() instanceof StalactiteBlock) {
+					BlockState state2 = world.getBlockState(POS);
+					int size = state2.get(SIZE);
+					if (size < i) {
+						world.setBlockState(POS, state2.with(SIZE, i));
+					}
+					else {
+						break;
+					}
+				}
+				else {
+					break;
+				}
+			}
+		}
+	}
+	
+	@Override
+	public BlockState getStateForNeighborUpdate(BlockState state, Direction facing, BlockState neighborState, WorldAccess world, BlockPos pos, BlockPos neighborPos) {
+		if (!canPlaceAt(state, world, pos)) {
+			return Blocks.AIR.getDefaultState();
+		}
+		else {
+			return state;
+		}
+	}
+
+	@Override
+	public boolean canPlaceAt(BlockState state, WorldView world, BlockPos pos) {
+		BlockState upState = world.getBlockState(pos.up());
+		BlockState downState = world.getBlockState(pos.down());
+		int size = state.get(SIZE);
+		boolean validUp = (upState.isOf(this) && upState.get(SIZE) >= size) || upState.isFullCube(world, pos.up());
+		boolean validDown = (downState.isOf(this) && downState.get(SIZE) >= size) || downState.isFullCube(world, pos.down());
+		return validUp || validDown;
+	}
+	
+	@Override
+	public String getModelPattern(String block) {
+		Identifier blockId = Registry.BLOCK.getId(this);
+		if (block.contains("item")) {
+			return Patterns.createJson(Patterns.ITEM_GENERATED, "item/" + blockId.getPath());
+		}
+		blockId = Registry.BLOCK.getId(source);
+		int shape = Character.getNumericValue(block.charAt(block.lastIndexOf('_') + 1));
+		return Patterns.createJson(Patterns.BLOCKS_STALACTITE[shape], blockId.getNamespace() + ":block/" + blockId.getPath());
+	}
+	
+	@Override
+	public Identifier statePatternId() {
+		return Patterns.STATE_STALACTITE;
+	}
+
+	static {
+		SHAPES = new VoxelShape[8];
+		for (int i = 0; i < 8; i++) {
+			SHAPES[i] = Block.createCuboidShape(7 - i, 0, 7 - i, 9 + i, 16, 9 + i);
+		}
+	}
+}