import cn.nukkit.entity.item.EntityPainting; //导入依赖的package包/类
@Override
public boolean onActivate(Level level, Player player, Block block, Block target, BlockFace face, double fx, double fy, double fz) {
    FullChunk chunk = level.getChunk((int) block.getX() >> 4, (int) block.getZ() >> 4);

    if (chunk == null) {
        return false;
    }

    if (!target.isTransparent() && face.getIndex() > 1 && !block.isSolid()) {
        int[] direction = {2, 0, 1, 3};
        int[] right = {4, 5, 3, 2};

        List<EntityPainting.Motive> validMotives = new ArrayList<>();
        for (EntityPainting.Motive motive : EntityPainting.motives) {
            boolean valid = true;
            for (int x = 0; x < motive.width && valid; x++) {
                for (int z = 0; z < motive.height && valid; z++) {
                    if (target.getSide(BlockFace.fromIndex(right[face.getIndex() - 2]), x).isTransparent() ||
                            target.up(z).isTransparent() ||
                            block.getSide(BlockFace.fromIndex(right[face.getIndex() - 2]), x).isSolid() ||
                            block.up(z).isSolid()) {
                        valid = false;
                    }
                }
            }

            if (valid) {
                validMotives.add(motive);
            }
        }

        CompoundTag nbt = new CompoundTag()
                .putByte("Direction", direction[face.getIndex() - 2])
                .putString("Motive", validMotives.get(ThreadLocalRandom.current().nextInt(validMotives.size())).title)
                .putList(new ListTag<DoubleTag>("Pos")
                        .add(new DoubleTag("0", target.x))
                        .add(new DoubleTag("1", target.y))
                        .add(new DoubleTag("2", target.z)))
                .putList(new ListTag<DoubleTag>("Motion")
                        .add(new DoubleTag("0", 0))
                        .add(new DoubleTag("1", 0))
                        .add(new DoubleTag("2", 0)))
                .putList(new ListTag<FloatTag>("Rotation")
                        .add(new FloatTag("0", direction[face.getIndex() - 2] * 90))
                        .add(new FloatTag("1", 0)));

        EntityPainting entity = new EntityPainting(chunk, nbt);

        if (player.isSurvival()) {
            Item item = player.getInventory().getItemInHand();
            item.setCount(item.getCount() - 1);
            player.getInventory().setItemInHand(item);
        }
        entity.spawnToAll();

        return true;
    }

    return false;
}
 

import cn.nukkit.entity.item.EntityPainting; //导入依赖的package包/类
@Override
public boolean onActivate(Level level, Player player, Block block, Block target, int face, double fx, double fy, double fz) {
    FullChunk chunk = level.getChunk((int) block.getX() >> 4, (int) block.getZ() >> 4);

    if (chunk == null) {
        return false;
    }

    if (!target.isTransparent() && face > 1 && !block.isSolid()) {
        int[] direction = {2, 0, 1, 3};
        int[] right = {4, 5, 3, 2};

        List<EntityPainting.Motive> validMotives = new ArrayList<>();
        for (EntityPainting.Motive motive : EntityPainting.motives) {
            boolean valid = true;
            for (int x = 0; x < motive.width && valid; x++) {
                for (int z = 0; z < motive.height && valid; z++) {
                    if (target.getSide(right[face - 2], x).isTransparent() ||
                            target.getSide(Vector3.SIDE_UP, z).isTransparent() ||
                            block.getSide(right[face - 2], x).isSolid() ||
                            block.getSide(Vector3.SIDE_UP, z).isSolid()) {
                        valid = false;
                    }
                }
            }

            if (valid) {
                validMotives.add(motive);
            }
        }

        CompoundTag nbt = new CompoundTag()
                .putByte("Direction", direction[face - 2])
                .putString("Motive", validMotives.get(ThreadLocalRandom.current().nextInt(validMotives.size())).title)
                .putList(new ListTag<DoubleTag>("Pos")
                        .add(new DoubleTag("0", target.x))
                        .add(new DoubleTag("1", target.y))
                        .add(new DoubleTag("2", target.z)))
                .putList(new ListTag<DoubleTag>("Motion")
                        .add(new DoubleTag("0", 0))
                        .add(new DoubleTag("1", 0))
                        .add(new DoubleTag("2", 0)))
                .putList(new ListTag<FloatTag>("Rotation")
                        .add(new FloatTag("0", direction[face - 2] * 90))
                        .add(new FloatTag("1", 0)));

        EntityPainting entity = new EntityPainting(chunk, nbt);

        if (player.isSurvival()) {
            Item item = player.getInventory().getItemInHand();
            item.setCount(item.getCount() - 1);
            player.getInventory().setItemInHand(item);
        }
        entity.spawnToAll();

        return true;
    }

    return false;
}
 

import cn.nukkit.entity.item.EntityPainting; //导入依赖的package包/类
@Override
public boolean isPainting() {
    return entity instanceof EntityPainting;
}