derkalaender

abstract class ItemNBTHolder(val stack: ItemStack, val compound: CompoundNBT) {
    protected fun byte(defaultValue: Byte) = SimpleNBTDelegate(defaultValue, CompoundNBT::getByte, CompoundNBT::putByte)
    protected fun short(defaultValue: Short) = SimpleNBTDelegate(defaultValue, CompoundNBT::getShort, CompoundNBT::putShort)
    protected fun int(defaultValue: Int) = SimpleNBTDelegate(defaultValue, CompoundNBT::getInt, CompoundNBT::putInt)
    protected fun long(defaultValue: Long) = SimpleNBTDelegate(defaultValue, CompoundNBT::getLong, CompoundNBT::putLong)
    protected fun float(defaultValue: Float) = SimpleNBTDelegate(defaultValue, CompoundNBT::getFloat, CompoundNBT::putFloat)
    protected fun double(defaultValue: Double) = SimpleNBTDelegate(defaultValue, CompoundNBT::getDouble, CompoundNBT::putDouble)
    protected fun string(defaultValue: String) = SimpleNBTDelegate(defaultValue, CompoundNBT::getString, CompoundNBT::putString)
    protected fun byteArray(defaultValue: ByteArray = ByteArray(0)) = SimpleN

derkalaender

class ExampleItem : Item(Properties().group(ItemGroup.MISC)) {
    /**
     * root
     * |- someString (String)
     * |- someBoolean (Boolean)
     * |- nested (Compound)
     * - |- immutableString (String)
     *   |- nullableUUID (UUID)
     *   |- evenMoreNested (Compound)
     *   - |- someIntArray (int[])

derkalaender

private val INSIDE_SHAPE: VoxelShape by lazy {
  voxelShape { cube(2 by 2 by 2, 14 by 14 by 14) }
}

private val OUTSIDE_SHAPE: VoxelShape by lazy {
  voxelShape {
    shape { fullCube }
    -voxelShape {
      cube(2 by 2 by 0, 14 by 14 by 16)
      +voxelShape { cube(2 by 0 by 2, 14 by 16 by 14) }