37可投掷射弹

代码

增加一个股子方块

public class DiceBlock extends Block {
    public static DirectionProperty FACING = DirectionProperty.of("number",
            Direction.UP,
            Direction.NORTH,
            Direction.EAST,
            Direction.SOUTH,
            Direction.WEST,
            Direction.DOWN);

    public DiceBlock(Settings settings) {
        super(settings);
    }

    @Nullable
    @Override
    public BlockState getPlacementState(ItemPlacementContext ctx) {
        return getRandomBlockState();
    }

    public BlockState getRandomBlockState() {
        return this.getDefaultState().with(FACING, getRandomDirection());
    }

    @Override
    protected void appendProperties(StateManager.Builder<Block, BlockState> builder) {
        builder.add(FACING);
    }

    private Direction getRandomDirection() {
        Direction[] dirs = new Direction[] {
                Direction.UP,
                Direction.NORTH,
                Direction.EAST,
                Direction.SOUTH,
                Direction.WEST,
                Direction.DOWN
        };

        return dirs[Random.create().nextBetween(0, dirs.length-1)];
    }
}

在ModBlocks中注册：

public static final Block DICE_BLOCK = Registry.register(Registries.BLOCK, new Identifier(TutorialMod.MOD_ID, "dice_block"),
        new DiceBlock(FabricBlockSettings.copyOf(Blocks.STONE)));

增加一个股子项目实体：

public class DiceProjectileEntity extends ThrownItemEntity {
    public DiceProjectileEntity(EntityType<? extends ThrownItemEntity> entityType, World world) {
        super(entityType, world);
    }

    public DiceProjectileEntity(LivingEntity livingEntity, World world) {
        super(ModEntities.DICE_PROJECTILE, livingEntity, world);
    }

    @Override
    protected Item getDefaultItem() {
        return ModItems.DICE;
    }

    @Override
    public Packet<ClientPlayPacketListener> createSpawnPacket() {
        return new EntitySpawnS2CPacket(this);
    }

    @Override
    protected void onBlockHit(BlockHitResult blockHitResult) {
        if(!this.getWorld().isClient()) {
            this.getWorld().sendEntityStatus(this, (byte)3);
            this.getWorld().setBlockState(getBlockPos(), ((DiceBlock) ModBlocks.DICE_BLOCK).getRandomBlockState(), 3);
        }

        this.discard();
        super.onBlockHit(blockHitResult);
    }
}

在ModEntities中注册：

public static final EntityType<DiceProjectileEntity> DICE_PROJECTILE = Registry.register(Registries.ENTITY_TYPE,
        new Identifier(TutorialMod.MOD_ID, "dice_projectile"),
        FabricEntityTypeBuilder.<DiceProjectileEntity>create(SpawnGroup.MISC, DiceProjectileEntity::new)
                .dimensions(EntityDimensions.fixed(0.25f, 0.25f)).build());

增加自定义物品：

public class DiceItem extends Item {
    public DiceItem(Settings settings) {
        super(settings);
    }

    @Override
    public TypedActionResult<ItemStack> use(World world, PlayerEntity user, Hand hand) {
        ItemStack itemStack = user.getStackInHand(hand);
        world.playSound(null, user.getX(), user.getY(), user.getZ(),
                SoundEvents.ENTITY_SNOWBALL_THROW, SoundCategory.NEUTRAL, 0.5f, 0.4f / (world.getRandom().nextFloat() * 0.4f + 0.8f));

        if (!world.isClient) {
            DiceProjectileEntity diceProjectileEntity = new DiceProjectileEntity(user, world);
            diceProjectileEntity.setItem(itemStack);
            diceProjectileEntity.setVelocity(user, user.getPitch(), user.getYaw(), 0.0f, 1.5f, 1.0f);
            world.spawnEntity(diceProjectileEntity);
        }

        user.incrementStat(Stats.USED.getOrCreateStat(this));
        if (!user.getAbilities().creativeMode) {
            itemStack.decrement(1);
        }
        return TypedActionResult.success(itemStack, world.isClient());
    }
}

在ModItems中注册

public static final Item DICE = registerItem("dice", new DiceItem(new FabricItemSettings()));

添加到物品组ModItemGroups：

entries.add(ModItems.DICE);

添加代码生成：

itemModelGenerator.register(ModItems.DICE, Models.GENERATED);

主类加载：TutorialModClient

EntityRendererRegistry.register(ModEntities.DICE_PROJECTILE, FlyingItemEntityRenderer::new);

效果