Package net.minecraft.block

Class ObserverBlock

java.lang.Object

net.minecraft.block.AbstractBlock

net.minecraft.block.Block

net.minecraft.block.FacingBlock

net.minecraft.block.ObserverBlock

All Implemented Interfaces:

ItemConvertible

public class ObserverBlock
extends FacingBlock

Mappings:

Namespace	Name
official	cow
intermediary	net/minecraft/class_2426
named	net/minecraft/block/ObserverBlock

Nested Class Summary

Nested classes/interfaces inherited from class net.minecraft.block.Block

Block.NeighborGroup

Nested classes/interfaces inherited from class net.minecraft.block.AbstractBlock

AbstractBlock.AbstractBlockState, AbstractBlock.ContextPredicate, AbstractBlock.OffsetType, AbstractBlock.Settings, AbstractBlock.TypedContextPredicate<A>

Field Summary

Fields

Modifier and Type	Field	Description
static final BooleanProperty	POWERED

Fields inherited from class net.minecraft.block.FacingBlock

FACING

Fields inherited from class net.minecraft.block.Block

field_31022, field_31023, field_31024, field_31025, field_31035, FORCE_STATE, MOVED, NO_REDRAW, NOTIFY_ALL, NOTIFY_LISTENERS, NOTIFY_NEIGHBORS, REDRAW_ON_MAIN_THREAD, SKIP_DROPS, SKIP_LIGHTING_UPDATES, STATE_IDS, stateManager

Fields inherited from class net.minecraft.block.AbstractBlock

collidable, DIRECTIONS, dynamicBounds, jumpVelocityMultiplier, lootTableId, material, randomTicks, resistance, settings, slipperiness, soundGroup, velocityMultiplier

Constructor Summary

Constructors

Constructor	Description
ObserverBlock(AbstractBlock.Settings settings)

Method Summary

Modifier and Type	Method	Description
protected void	appendProperties(StateManager.Builder<Block,BlockState> builder)	Appends block state properties to this block.
boolean	emitsRedstonePower(BlockState state)	Returns whether the block is capable of emitting redstone power.
BlockState	getPlacementState(ItemPlacementContext ctx)
BlockState	getStateForNeighborUpdate(BlockState state, Direction direction, BlockState neighborState, WorldAccess world, BlockPos pos, BlockPos neighborPos)	Returns the state of the block after a neighboring block's state change.
int	getStrongRedstonePower(BlockState state, BlockView world, BlockPos pos, Direction direction)	Returns the strong redstone power emitted from the block.
int	getWeakRedstonePower(BlockState state, BlockView world, BlockPos pos, Direction direction)	Returns the weak redstone power emitted from the block.
BlockState	mirror(BlockState state, BlockMirror mirror)	Returns state mirrored by mirror.
void	onBlockAdded(BlockState state, World world, BlockPos pos, BlockState oldState, boolean notify)	Called server-side on the new block when the block state is changed.
void	onStateReplaced(BlockState state, World world, BlockPos pos, BlockState newState, boolean moved)	Called server-side on the old block when the block state is changed.
BlockState	rotate(BlockState state, BlockRotation rotation)	Returns state rotated by rotation.
void	scheduledTick(BlockState state, ServerWorld world, BlockPos pos, Random random)	Called server-side when a block receives a scheduled tick.
private void	scheduleTick(WorldAccess world, BlockPos pos)
protected void	updateNeighbors(World world, BlockPos pos, BlockState state)

Methods inherited from class net.minecraft.block.Block

afterBreak, appendStacks, appendTooltip, asBlock, asItem, canMobSpawnInside, cannotConnect, createCuboidShape, dropExperience, dropExperienceWhenMined, dropStack, dropStack, dropStacks, dropStacks, dropStacks, dropStacks, getBlastResistance, getBlockFromItem, getDefaultState, getDroppedStacks, getDroppedStacks, getJumpVelocityMultiplier, getName, getPickStack, getRawIdFromState, getRegistryEntry, getShapesForStates, getSlipperiness, getSoundGroup, getStateFromRawId, getStateManager, getStateWithProperties, getTranslationKey, getVelocityMultiplier, hasDynamicBounds, hasRandomTicks, hasTopRim, isFaceFullSquare, isShapeFullCube, isTranslucent, onBreak, onBroken, onDestroyedByExplosion, onEntityLand, onLandedUpon, onPlaced, onSteppedOn, postProcessState, precipitationTick, pushEntitiesUpBeforeBlockChange, randomDisplayTick, replace, replace, setDefaultState, shouldDrawSide, shouldDropItemsOnExplosion, sideCoversSmallSquare, spawnBreakParticles, toString

Methods inherited from class net.minecraft.block.AbstractBlock

calcBlockBreakingDelta, canBucketPlace, canPathfindThrough, canPlaceAt, canReplace, createScreenHandlerFactory, getAmbientOcclusionLightLevel, getCameraCollisionShape, getCollisionShape, getComparatorOutput, getCullingShape, getDefaultMapColor, getDroppedStacks, getFluidState, getHardness, getLootTableId, getMaxHorizontalModelOffset, getOpacity, getOutlineShape, getPistonBehavior, getRaycastShape, getRenderingSeed, getRenderType, getSidesShape, getVerticalModelOffsetMultiplier, hasComparatorOutput, hasSidedTransparency, isCullingShapeFullCube, isShapeFullCube, isSideInvisible, neighborUpdate, onBlockBreakStart, onEntityCollision, onProjectileHit, onStacksDropped, onSyncedBlockEvent, onUse, prepare, randomTick

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

POWERED

public static final BooleanProperty POWERED

Mappings:

Namespace	Name	Mixin selector
official	b	Lcow;b:Lcwf;
intermediary	field_11322	Lnet/minecraft/class_2426;field_11322:Lnet/minecraft/class_2746;
named	POWERED	Lnet/minecraft/block/ObserverBlock;POWERED:Lnet/minecraft/state/property/BooleanProperty;

Constructor Details

ObserverBlock

public ObserverBlock(AbstractBlock.Settings settings)

Mappings:

Namespace	Name	Mixin selector
official	<init>	Lcvn;<init>(Lcvn$c;)V
intermediary	<init>	Lnet/minecraft/class_4970;<init>(Lnet/minecraft/class_4970$class_2251;)V
named	<init>	Lnet/minecraft/block/AbstractBlock;<init>(Lnet/minecraft/block/AbstractBlock$Settings;)V

Method Details

appendProperties

protected void appendProperties(StateManager.Builder<Block,BlockState> builder)

Appends block state properties to this block. To use this, override and call StateManager.Builder.add(net.minecraft.state.property.Property<?>[]) inside the method. See Properties for the list of pre-defined properties.

Overrides:

appendProperties in class Block

Mappings:

Namespace	Name	Mixin selector
official	a	Lcjt;a(Lcvp$a;)V
intermediary	method_9515	Lnet/minecraft/class_2248;method_9515(Lnet/minecraft/class_2689$class_2690;)V
named	appendProperties	Lnet/minecraft/block/Block;appendProperties(Lnet/minecraft/state/StateManager$Builder;)V

rotate

public BlockState rotate(BlockState state,
 BlockRotation rotation)

Returns state rotated by rotation.

By default, this returns the provided block state.

Overrides:

rotate in class AbstractBlock

Returns:

state rotated by rotation

Mappings:

Namespace	Name	Mixin selector
official	a	Lcvn;a(Lcvo;Lcpw;)Lcvo;
intermediary	method_9598	Lnet/minecraft/class_4970;method_9598(Lnet/minecraft/class_2680;Lnet/minecraft/class_2470;)Lnet/minecraft/class_2680;
named	rotate	Lnet/minecraft/block/AbstractBlock;rotate(Lnet/minecraft/block/BlockState;Lnet/minecraft/util/BlockRotation;)Lnet/minecraft/block/BlockState;

mirror

public BlockState mirror(BlockState state,
 BlockMirror mirror)

Returns state mirrored by mirror.

By default, this returns the provided block state.

Overrides:

mirror in class AbstractBlock

Returns:

state mirrored by mirror

Mappings:

Namespace	Name	Mixin selector
official	a	Lcvn;a(Lcvo;Lcoh;)Lcvo;
intermediary	method_9569	Lnet/minecraft/class_4970;method_9569(Lnet/minecraft/class_2680;Lnet/minecraft/class_2415;)Lnet/minecraft/class_2680;
named	mirror	Lnet/minecraft/block/AbstractBlock;mirror(Lnet/minecraft/block/BlockState;Lnet/minecraft/util/BlockMirror;)Lnet/minecraft/block/BlockState;

scheduledTick

public void scheduledTick(BlockState state,
 ServerWorld world,
 BlockPos pos,
 Random random)

Called server-side when a block receives a scheduled tick. This can be used like a timer. Scheduled ticks are added using WorldAccess.createAndScheduleBlockTick(BlockPos, Block, int). Additionally, AbstractBlock.randomTick(net.minecraft.block.BlockState, net.minecraft.server.world.ServerWorld, net.minecraft.util.math.BlockPos, net.minecraft.util.math.random.Random) by default calls this method; override AbstractBlock.randomTick(net.minecraft.block.BlockState, net.minecraft.server.world.ServerWorld, net.minecraft.util.math.BlockPos, net.minecraft.util.math.random.Random) to disable this behavior.

Scheduled ticks are often used inside AbstractBlock.getStateForNeighborUpdate(net.minecraft.block.BlockState, net.minecraft.util.math.Direction, net.minecraft.block.BlockState, net.minecraft.world.WorldAccess, net.minecraft.util.math.BlockPos, net.minecraft.util.math.BlockPos).

Here are some examples:

• SugarCaneBlock checks the placement requirement.
• DispenserBlock dispenses its content.
• CommandBlock executes its command.
• FrogspawnBlock spawns a tadpole.
• SoulSandBlock updates a bubble column.
• FallingBlock tries to fall.

Overrides:

scheduledTick in class AbstractBlock

See Also:

• WorldAccess.createAndScheduleBlockTick(BlockPos, Block, int)
• AbstractBlock.getStateForNeighborUpdate(net.minecraft.block.BlockState, net.minecraft.util.math.Direction, net.minecraft.block.BlockState, net.minecraft.world.WorldAccess, net.minecraft.util.math.BlockPos, net.minecraft.util.math.BlockPos)
• AbstractBlock.randomTick(net.minecraft.block.BlockState, net.minecraft.server.world.ServerWorld, net.minecraft.util.math.BlockPos, net.minecraft.util.math.random.Random)

Mappings:

Namespace	Name	Mixin selector
official	a	Lcvn;a(Lcvo;Lagg;Lgt;Lamn;)V
intermediary	method_9588	Lnet/minecraft/class_4970;method_9588(Lnet/minecraft/class_2680;Lnet/minecraft/class_3218;Lnet/minecraft/class_2338;Lnet/minecraft/class_5819;)V
named	scheduledTick	Lnet/minecraft/block/AbstractBlock;scheduledTick(Lnet/minecraft/block/BlockState;Lnet/minecraft/server/world/ServerWorld;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/random/Random;)V

getStateForNeighborUpdate

public BlockState getStateForNeighborUpdate(BlockState state,
 Direction direction,
 BlockState neighborState,
 WorldAccess world,
 BlockPos pos,
 BlockPos neighborPos)

Returns the state of the block after a neighboring block's state change.

Returning Blocks.AIR breaks the block. This is useful to implement supporting block requirement for blocks (if used along with AbstractBlock.canPlaceAt(net.minecraft.block.BlockState, net.minecraft.world.WorldView, net.minecraft.util.math.BlockPos)).

Side effects like activating a redstone component (but not scheduling a tick) should be performed in AbstractBlock.neighborUpdate(net.minecraft.block.BlockState, net.minecraft.world.World, net.minecraft.util.math.BlockPos, net.minecraft.block.Block, net.minecraft.util.math.BlockPos, boolean) instead. If the block supports waterlogging and currently has water, this method should be overridden to tick the fluid at the block's position.

This method is called on both the logical client and logical server, so take caution when overriding this method. The logical side can be checked using World.isClient. This is not called if Block.FORCE_STATE flag is set in the setBlockState call.

This method can be used for multiple purposes. Here are some examples:

• FenceBlock uses it to update the fence's connection when a horizontally neighboring block's state is changed.
• PlantBlock uses it to break the plant if the state change causes it to lose its supporting block.
• DoorBlock uses it to copy the state of the other half of the door.
• SlabBlock uses it to schedule the fluid to tick if waterlogged.
• SoulSandBlock uses it to schedule the water block above to tick so that it becomes a bubble column.
• FallingBlock uses it to schedule the block to tick so that it can fall if needed.

Overrides:

getStateForNeighborUpdate in class AbstractBlock

Parameters:

state - the state of this block

direction - the direction from this block to the neighbor

neighborState - the state of the updated neighbor block

world - the world

pos - the position of this block

neighborPos - the position of the neighbor block

Returns:

the state of the block after a neighboring block's state change

See Also:

• AbstractBlock.neighborUpdate(net.minecraft.block.BlockState, net.minecraft.world.World, net.minecraft.util.math.BlockPos, net.minecraft.block.Block, net.minecraft.util.math.BlockPos, boolean)
• AbstractBlock.prepare(net.minecraft.block.BlockState, net.minecraft.world.WorldAccess, net.minecraft.util.math.BlockPos, int, int)
• AbstractBlock.canPlaceAt(net.minecraft.block.BlockState, net.minecraft.world.WorldView, net.minecraft.util.math.BlockPos)
• Block.FORCE_STATE

Mappings:

Namespace	Name	Mixin selector
official	a	Lcvn;a(Lcvo;Lgy;Lcvo;Lcgy;Lgt;Lgt;)Lcvo;
intermediary	method_9559	Lnet/minecraft/class_4970;method_9559(Lnet/minecraft/class_2680;Lnet/minecraft/class_2350;Lnet/minecraft/class_2680;Lnet/minecraft/class_1936;Lnet/minecraft/class_2338;Lnet/minecraft/class_2338;)Lnet/minecraft/class_2680;
named	getStateForNeighborUpdate	Lnet/minecraft/block/AbstractBlock;getStateForNeighborUpdate(Lnet/minecraft/block/BlockState;Lnet/minecraft/util/math/Direction;Lnet/minecraft/block/BlockState;Lnet/minecraft/world/WorldAccess;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/BlockPos;)Lnet/minecraft/block/BlockState;

scheduleTick

private void scheduleTick(WorldAccess world,
 BlockPos pos)

Mappings:

Namespace	Name	Mixin selector
official	a	Lcow;a(Lcgy;Lgt;)V
intermediary	method_10366	Lnet/minecraft/class_2426;method_10366(Lnet/minecraft/class_1936;Lnet/minecraft/class_2338;)V
named	scheduleTick	Lnet/minecraft/block/ObserverBlock;scheduleTick(Lnet/minecraft/world/WorldAccess;Lnet/minecraft/util/math/BlockPos;)V

updateNeighbors

protected void updateNeighbors(World world,
 BlockPos pos,
 BlockState state)

Mappings:

Namespace	Name	Mixin selector
official	a	Lcow;a(Lcgx;Lgt;Lcvo;)V
intermediary	method_10365	Lnet/minecraft/class_2426;method_10365(Lnet/minecraft/class_1937;Lnet/minecraft/class_2338;Lnet/minecraft/class_2680;)V
named	updateNeighbors	Lnet/minecraft/block/ObserverBlock;updateNeighbors(Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/BlockState;)V

emitsRedstonePower

public boolean emitsRedstonePower(BlockState state)

Returns whether the block is capable of emitting redstone power.

This does not return whether the block is currently emitting redstone power. Use World.isEmittingRedstonePower(net.minecraft.util.math.BlockPos, net.minecraft.util.math.Direction) in that case.

Overrides:

emitsRedstonePower in class AbstractBlock

Returns:

whether the block is capable of emitting redstone power

See Also:

• World.isEmittingRedstonePower(net.minecraft.util.math.BlockPos, net.minecraft.util.math.Direction)

Mappings:

Namespace	Name	Mixin selector
official	f_	Lcvn;f_(Lcvo;)Z
intermediary	method_9506	Lnet/minecraft/class_4970;method_9506(Lnet/minecraft/class_2680;)Z
named	emitsRedstonePower	Lnet/minecraft/block/AbstractBlock;emitsRedstonePower(Lnet/minecraft/block/BlockState;)Z

getStrongRedstonePower

public int getStrongRedstonePower(BlockState state,
 BlockView world,
 BlockPos pos,
 Direction direction)

Returns the strong redstone power emitted from the block.

When overriding this, make sure to also override AbstractBlock.emitsRedstonePower(net.minecraft.block.BlockState) to return true. AbstractBlock.getWeakRedstonePower(net.minecraft.block.BlockState, net.minecraft.world.BlockView, net.minecraft.util.math.BlockPos, net.minecraft.util.math.Direction) might also need to be overridden.

Strong redstone power is a power that can power a redstone wire when a solid block is in between. For example, RedstoneBlock and TargetBlock emits weak redstone power only. LeverBlock and AbstractButtonBlock emits both weak and strong redstone power.

Overrides:

getStrongRedstonePower in class AbstractBlock

Returns:

the strong redstone power emitted from the block

See Also:

• AbstractBlock.emitsRedstonePower(net.minecraft.block.BlockState)
• AbstractBlock.getWeakRedstonePower(net.minecraft.block.BlockState, net.minecraft.world.BlockView, net.minecraft.util.math.BlockPos, net.minecraft.util.math.Direction)
• World.isReceivingRedstonePower(net.minecraft.util.math.BlockPos)

Mappings:

Namespace	Name	Mixin selector
official	b	Lcvn;b(Lcvo;Lcgd;Lgt;Lgy;)I
intermediary	method_9603	Lnet/minecraft/class_4970;method_9603(Lnet/minecraft/class_2680;Lnet/minecraft/class_1922;Lnet/minecraft/class_2338;Lnet/minecraft/class_2350;)I
named	getStrongRedstonePower	Lnet/minecraft/block/AbstractBlock;getStrongRedstonePower(Lnet/minecraft/block/BlockState;Lnet/minecraft/world/BlockView;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/Direction;)I

getWeakRedstonePower

public int getWeakRedstonePower(BlockState state,
 BlockView world,
 BlockPos pos,
 Direction direction)

Returns the weak redstone power emitted from the block.

When overriding this, make sure to also override AbstractBlock.emitsRedstonePower(net.minecraft.block.BlockState) to return true.

Weak redstone power is a power that cannot power a redstone wire when a solid block is in between. For example, RedstoneBlock and TargetBlock emits weak redstone power only. LeverBlock and AbstractButtonBlock emits both weak and strong redstone power depending on the direction.

Overrides:

getWeakRedstonePower in class AbstractBlock

Returns:

the weak redstone power emitted from the block

See Also:

• AbstractBlock.emitsRedstonePower(net.minecraft.block.BlockState)
• AbstractBlock.getStrongRedstonePower(net.minecraft.block.BlockState, net.minecraft.world.BlockView, net.minecraft.util.math.BlockPos, net.minecraft.util.math.Direction)
• World.isReceivingRedstonePower(net.minecraft.util.math.BlockPos)

Mappings:

Namespace	Name	Mixin selector
official	a	Lcvn;a(Lcvo;Lcgd;Lgt;Lgy;)I
intermediary	method_9524	Lnet/minecraft/class_4970;method_9524(Lnet/minecraft/class_2680;Lnet/minecraft/class_1922;Lnet/minecraft/class_2338;Lnet/minecraft/class_2350;)I
named	getWeakRedstonePower	Lnet/minecraft/block/AbstractBlock;getWeakRedstonePower(Lnet/minecraft/block/BlockState;Lnet/minecraft/world/BlockView;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/util/math/Direction;)I

onBlockAdded

public void onBlockAdded(BlockState state,
 World world,
 BlockPos pos,
 BlockState oldState,
 boolean notify)

Called server-side on the new block when the block state is changed. This includes block placement. When overriding this method, AbstractBlock.getStateForNeighborUpdate(net.minecraft.block.BlockState, net.minecraft.util.math.Direction, net.minecraft.block.BlockState, net.minecraft.world.WorldAccess, net.minecraft.util.math.BlockPos, net.minecraft.util.math.BlockPos) or AbstractBlock.neighborUpdate(net.minecraft.block.BlockState, net.minecraft.world.World, net.minecraft.util.math.BlockPos, net.minecraft.block.Block, net.minecraft.util.math.BlockPos, boolean) should also be overridden. The method is used in the following cases:

• When activating a redstone component on placement (used along with AbstractBlock.neighborUpdate(net.minecraft.block.BlockState, net.minecraft.world.World, net.minecraft.util.math.BlockPos, net.minecraft.block.Block, net.minecraft.util.math.BlockPos, boolean)
• When resetting a position-dependent state (see TargetBlock)
• When converting a block on placement (see WetSpongeBlock)
• When fire lights a portal

Overrides:

onBlockAdded in class AbstractBlock

See Also:

• AbstractBlock.onStateReplaced(net.minecraft.block.BlockState, net.minecraft.world.World, net.minecraft.util.math.BlockPos, net.minecraft.block.BlockState, boolean)

Mappings:

Namespace	Name	Mixin selector
official	b	Lcvn;b(Lcvo;Lcgx;Lgt;Lcvo;Z)V
intermediary	method_9615	Lnet/minecraft/class_4970;method_9615(Lnet/minecraft/class_2680;Lnet/minecraft/class_1937;Lnet/minecraft/class_2338;Lnet/minecraft/class_2680;Z)V
named	onBlockAdded	Lnet/minecraft/block/AbstractBlock;onBlockAdded(Lnet/minecraft/block/BlockState;Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/BlockState;Z)V

onStateReplaced

public void onStateReplaced(BlockState state,
 World world,
 BlockPos pos,
 BlockState newState,
 boolean moved)

Called server-side on the old block when the block state is changed. This includes block removal. This is used to update neighboring blocks when an active redstone power source is removed, or to drop the contents of an inventory. The check state.isOf(newState.getBlock()) can be used to see if the block was removed or not.

Overrides:

onStateReplaced in class AbstractBlock

See Also:

• ItemScatterer.spawn(World, BlockPos, net.minecraft.inventory.Inventory)
• AbstractBlock.onBlockAdded(net.minecraft.block.BlockState, net.minecraft.world.World, net.minecraft.util.math.BlockPos, net.minecraft.block.BlockState, boolean)

Mappings:

Namespace	Name	Mixin selector
official	a	Lcvn;a(Lcvo;Lcgx;Lgt;Lcvo;Z)V
intermediary	method_9536	Lnet/minecraft/class_4970;method_9536(Lnet/minecraft/class_2680;Lnet/minecraft/class_1937;Lnet/minecraft/class_2338;Lnet/minecraft/class_2680;Z)V
named	onStateReplaced	Lnet/minecraft/block/AbstractBlock;onStateReplaced(Lnet/minecraft/block/BlockState;Lnet/minecraft/world/World;Lnet/minecraft/util/math/BlockPos;Lnet/minecraft/block/BlockState;Z)V

getPlacementState

public BlockState getPlacementState(ItemPlacementContext ctx)

Overrides:

getPlacementState in class Block

Mappings:

Namespace	Name	Mixin selector
official	a	Lcjt;a(Lccx;)Lcvo;
intermediary	method_9605	Lnet/minecraft/class_2248;method_9605(Lnet/minecraft/class_1750;)Lnet/minecraft/class_2680;
named	getPlacementState	Lnet/minecraft/block/Block;getPlacementState(Lnet/minecraft/item/ItemPlacementContext;)Lnet/minecraft/block/BlockState;