Version: Minecraft 26.2

All functions

Generated

This page is generated from the source's Javadoc by ./gradlew apiReference. Do not edit it; fix the source comment and generate it again.

Every public constructor and method of the API in one list, by package: what it returns, the first sentence of its description, and the release that added it. The name links to its full entry: signature, every parameter, the return value, the exceptions, when to call it and on which thread.

client

Function	Returns	Description	Since
`BlockEntityCanvas.animationTime()`	`float`	World time plus the partial tick, for smooth animation.	`0.1.0-alpha.4` or earlier
`BlockEntityCanvas.block(BlockStateView, double, double, double, float, float)`	`void`	Draws the block model of `state`, for example a lamp that is lit, placed like `block(ResourceId, double, double, double, float, float)`.	`0.1.0-alpha.4` or earlier
`BlockEntityCanvas.block(ResourceId, double, double, double, float, float)`	`void`	Draws the block model of `block`'s default state, centred on `x, y, z` and turned `yawDegrees` around the vertical axis; `scale` 1 is full block size.	`0.1.0-alpha.4` or earlier
`BlockEntityCanvas.defaultState(ResourceId)`	`BlockStateView`	The default state of `block`, to change with `BlockStateView.with` and draw with `block(BlockStateView, double, double, double, float, float)`.	`0.1.0-alpha.4` or earlier
`BlockEntityCanvas.item(ResourceId, double, double, double, float, float)`	`void`	Draws an item as in an item frame.	`0.1.0-alpha.4` or earlier
`BlockEntityCanvas.quads(ShaderPipeline, Consumer<VertexSink>)`	`void`	Quads drawn with a mod shader pipeline, four vertices per quad, in the same coordinates as the other draws (the block's lowest corner is `0, 0, 0`).	`0.1.0-alpha.4` or earlier
`BlockEntityCanvas.text(String, double, double, double, float, int)`	`void`	Draws text centred at the position, facing the camera.	`0.1.0-alpha.4` or earlier
`BlockEntityPainter.paint(BlockEntityView, BlockEntityCanvas)`	`void`	Draws for one block entity; `canvas` is placed at the block's lowest corner.	`0.1.0-alpha.4` or earlier
`ClientConnectionListener.onConnection(ClientView)`	`void`	Called on the client thread when the client joins or leaves a world.	`0.1.0-alpha.4` or earlier
`ClientRegistrar.blockEntityRenderer(ResourceId, BlockEntityPainter)`	`void`	Draws extra things for a mod block that has a block entity.	`0.1.0-alpha.4` or earlier
`ClientRegistrar.dynamicTexture(String, int, int)`	`DynamicTexture`	Declares a texture with pixels set by code, `<mod id>:dynamic/<path>`.	`0.1.0-alpha.4` or earlier
`ClientRegistrar.hudLayer(String, HudLayer)`	`void`	Adds a layer drawn over the game's HUD every frame, after the game's own layers, in registration order.	`0.1.0-alpha.4` or earlier
`ClientRegistrar.keyBinding(String, int)`	`KeyBinding`	Declares a key binding that players can rebind in Controls.	`0.1.0-alpha.4` or earlier
`ClientRegistrar.shaderPipeline(String, ShaderPipelineDefinition)`	`ShaderPipeline`	Declares render pipeline `<mod id>:<path>` using the mod's own core shader, for `WorldCanvas.quads` and `BlockEntityCanvas.quads`.	`0.1.0-alpha.4` or earlier
`ClientRegistrar.worldPainter(String, WorldPainter)`	`void`	Draws in the world every frame with `painter`.	`0.1.0-alpha.4` or earlier
`ClientTickListener.onClientTick(ClientView)`	`void`	Called at the end of each client tick.	`0.1.0-alpha.4` or earlier
`ClientView.cameraPerspective()`	`CameraPerspective`	The camera perspective.	`0.1.0-alpha.4` or earlier
`ClientView.clearPostEffect()`	`void`	Removes the post effect.	`0.1.0-alpha.4` or earlier
`ClientView.closeScreen()`	`void`	Closes the open screen, if any, returning to the game.	`0.1.0-alpha.4` or earlier
`ClientView.isScreenOpen()`	`boolean`	Whether any screen (menu, inventory, chat, mod screen) is open.	`0.1.0-alpha.4` or earlier
`ClientView.leaveWorld()`	`void`	Leaves the world like "Save and Quit to Title" (single player) or "Disconnect" (servers).	`0.1.0-alpha.4` or earlier
`ClientView.openScreen(ModScreen)`	`void`	Opens `screen`, replacing any open screen.	`0.1.0-alpha.4` or earlier
`ClientView.player()`	`Optional<PlayerView>`	The local player, when in a world.	`0.1.0-alpha.4` or earlier
`ClientView.postEffect()`	`Optional<ResourceId>`	The active post effect, if any.	`0.1.0-alpha.4` or earlier
`ClientView.setCameraPerspective(CameraPerspective)`	`void`	Changes the camera perspective, as F5 does.	`0.1.0-alpha.4` or earlier
`ClientView.setPostEffect(ResourceId)`	`boolean`	Applies a full-screen post effect from `assets/<namespace>/post_effect/<path>.json`, with its shaders, until cleared.	`0.1.0-alpha.4` or earlier
`ClientView.showActionBar(String)`	`void`	Shows a message above the hotbar (the action bar).	`0.1.0-alpha.4` or earlier
`ClientView.world()`	`Optional<WorldView>`	The client's copy of the current world, when in one.	`0.1.0-alpha.4` or earlier
`DynamicTexture.fill(int)`	`void`	Sets every pixel.	`0.1.0-alpha.4` or earlier
`DynamicTexture.height()`	`int`	Height in pixels.	`0.1.0-alpha.4` or earlier
`DynamicTexture.id()`	`ResourceId`	The texture's ID, `<mod id>:dynamic/<path>`.	`0.1.0-alpha.4` or earlier
`DynamicTexture.setPixel(int, int, int)`	`void`	Sets one pixel, `0xAARRGGBB`.	`0.1.0-alpha.4` or earlier
`DynamicTexture.upload()`	`void`	Sends the pixels to the graphics card.	`0.1.0-alpha.4` or earlier
`DynamicTexture.width()`	`int`	Width in pixels.	`0.1.0-alpha.4` or earlier
`FovModifier.modifyFov(float)`	`float`	Returns the field of view in degrees to use instead of `fov`; listeners chain.	`0.1.0-alpha.4` or earlier
`HudCanvas.drawText(String, int, int, int)`	`void`	Draws text with a shadow.	`0.1.0-alpha.4` or earlier
`HudCanvas.drawTexture(ResourceId, int, int, int, int)`	`void`	Draws a whole texture, such as `my_mod:textures/gui/icon.png` or a `DynamicTexture`, stretched to `width × height`.	`0.1.0-alpha.4` or earlier
`HudCanvas.fill(int, int, int, int, int)`	`void`	Fills the rectangle from `(x1, y1)` inclusive to `(x2, y2)` exclusive.	`0.1.0-alpha.4` or earlier
`HudCanvas.height()`	`int`	Height of the screen in GUI pixels.	`0.1.0-alpha.4` or earlier
`HudCanvas.textWidth(String)`	`int`	Width of `text` in the game font.	`0.1.0-alpha.4` or earlier
`HudCanvas.width()`	`int`	Width of the screen in GUI pixels.	`0.1.0-alpha.4` or earlier
`HudLayer.render(HudCanvas)`	`void`	Draws the layer.	`0.1.0-alpha.4` or earlier
`ItemTooltipListener.onItemTooltip(ItemStackRef, TooltipLines, boolean)`	`void`	Called on the client thread whenever the game builds an item's tooltip (every frame the tooltip is shown, and for the creative search), after the game's own lines.	`0.1.0-alpha.4` or earlier
`KeyBinding.consumeClick()`	`boolean`	Returns `true` once per press since the last call, so no press is lost between ticks.	`0.1.0-alpha.4` or earlier
`KeyBinding.id()`	`ResourceId`	The binding's ID.	`0.1.0-alpha.4` or earlier
`KeyBinding.isDown()`	`boolean`	Whether the key is held now.	`0.1.0-alpha.4` or earlier
`ModScreen.init(ScreenBuilder)`	`void`	Places widgets.	`0.1.0-alpha.4` or earlier
`ModScreen.onClosed()`	`void`	The screen was closed, by the player (Esc) or by code.	`0.1.0-alpha.4` or earlier
`ModScreen.pausesGame()`	`boolean`	Whether the game pauses while the screen is open (single player only).	`0.1.0-alpha.4` or earlier
`ModScreen.render(HudCanvas)`	`void`	Draws extra content every frame, above the background and below the widgets.	`0.1.0-alpha.4` or earlier
`ModScreen.title()`	`String`	Title used for narration and the window title.	`0.1.0-alpha.4` or earlier
`ScreenBuilder.button(String, int, int, int, int, Runnable)`	`void`	A clickable button; `onPress` runs on the client thread.	`0.1.0-alpha.4` or earlier
`ScreenBuilder.close()`	`void`	Closes this screen.	`0.1.0-alpha.4` or earlier
`ScreenBuilder.height()`	`int`	Screen height.	`0.1.0-alpha.4` or earlier
`ScreenBuilder.label(String, int, int, int)`	`void`	Text drawn every frame.	`0.1.0-alpha.4` or earlier
`ScreenBuilder.textInput(int, int, int, String)`	`TextInput`	A single-line text input, 20 pixels high.	`0.1.0-alpha.4` or earlier
`ScreenBuilder.textWidth(String)`	`int`	Width of `text` in the game font.	`0.1.0-alpha.4` or earlier
`ScreenBuilder.width()`	`int`	Screen width.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.Builder.blend(ShaderPipelineDefinition.Blend)`	`ShaderPipelineDefinition.Builder`	How colours mix; `Blend.TRANSLUCENT` by default.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.Builder.build()`	`ShaderPipelineDefinition`	Creates the definition.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.Builder.cull()`	`ShaderPipelineDefinition.Builder`	Skips quads facing away from the camera.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.Builder.depthWrite()`	`ShaderPipelineDefinition.Builder`	The quads hide what is drawn behind them later, like solid geometry.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.Builder.noDepthTest()`	`ShaderPipelineDefinition.Builder`	Draws the quads in front of blocks.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.Builder.texture(ResourceId)`	`ShaderPipelineDefinition.Builder`	Binds a texture as the next sampler: the first call is `Sampler0`.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.Builder.uniform(String, ShaderUniform.Type, ShaderUniform.Source)`	`ShaderPipelineDefinition.Builder`	Adds a field to the pipeline's `ModUniforms` block, after the ones added before.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.ShaderPipelineDefinition(ResourceId, ShaderPipelineDefinition.Blend, boolean, boolean, boolean)`	new instance	A pipeline without textures or mod uniforms.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.ShaderPipelineDefinition(ResourceId, ShaderPipelineDefinition.Blend, boolean, boolean, boolean, List<ResourceId>, List<ShaderUniform>)`	new instance	Validates the definition.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.builder(ResourceId)`	`ShaderPipelineDefinition.Builder`	A translucent, double-sided pipeline that blocks hide and that hides nothing.	`0.1.0-alpha.4` or earlier
`ShaderPipelineDefinition.textured()`	`boolean`	Whether the vertices carry texture coordinates (`UV0`).	`0.1.0-alpha.4` or earlier
`ShaderUniform.Source.values()`	`float[]`	The value: exactly `Type.components()` floats.	`0.1.0-alpha.4` or earlier
`ShaderUniform.Type.components()`	`int`	How many floats `Source.values()` must return.	`0.1.0-alpha.4` or earlier
`TextInput.setValue(String)`	`void`	Replaces the text.	`0.1.0-alpha.4` or earlier
`TextInput.value()`	`String`	The current text.	`0.1.0-alpha.4` or earlier
`TooltipLines.add(String)`	`void`	Adds a line at the end.	`0.1.0-alpha.4` or earlier
`TooltipLines.add(int, String)`	`void`	Inserts a line before line `index`; `size()` appends.	`0.1.0-alpha.4` or earlier
`TooltipLines.get(int)`	`String`	The text of line `index` without formatting.	`0.1.0-alpha.4` or earlier
`TooltipLines.remove(int)`	`void`	Removes line `index`.	`0.1.0-alpha.4` or earlier
`TooltipLines.size()`	`int`	Number of lines, the name included.	`0.1.0-alpha.4` or earlier
`VertexSink.vertex(double, double, double, float, float, int)`	`VertexSink`	Adds a vertex with a texture coordinate and a colour `0xAARRGGBB`; the shader receives them as `Position`, `UV0` and `Color`.	`0.1.0-alpha.4` or earlier
`VertexSink.vertex(double, double, double, int)`	`VertexSink`	Adds a vertex with a colour `0xAARRGGBB` and texture coordinate `(0, 0)`.	`0.1.0-alpha.4` or earlier
`WorldCanvas.animationTime()`	`float`	Game time in ticks plus the partial tick, for smooth animation.	`0.1.0-alpha.4` or earlier
`WorldCanvas.blockOutline(BlockPos, int, float)`	`void`	The edges of one block.	`0.1.0-alpha.4` or earlier
`WorldCanvas.box(double, double, double, double, double, double, int, float, int)`	`void`	A box between two corners: its edges in `strokeArgb` (`width` pixels wide) and its faces filled with `fillArgb`; pass 0 for either to leave it out.	`0.1.0-alpha.4` or earlier
`WorldCanvas.cameraX()`	`double`	Camera x this frame.	`0.1.0-alpha.4` or earlier
`WorldCanvas.cameraY()`	`double`	Camera y this frame.	`0.1.0-alpha.4` or earlier
`WorldCanvas.cameraZ()`	`double`	Camera z this frame.	`0.1.0-alpha.4` or earlier
`WorldCanvas.line(double, double, double, double, double, double, int, float)`	`void`	A line from one point to another, `width` pixels wide.	`0.1.0-alpha.4` or earlier
`WorldCanvas.onTop()`	`WorldCanvas`	This canvas, drawing lines, boxes, points and text in front of blocks.	`0.1.0-alpha.4` or earlier
`WorldCanvas.point(double, double, double, int, float)`	`void`	A square dot `size` pixels wide.	`0.1.0-alpha.4` or earlier
`WorldCanvas.quads(ShaderPipeline, Consumer<VertexSink>)`	`void`	Quads drawn with a mod shader pipeline: four vertices per quad, in world coordinates.	`0.1.0-alpha.4` or earlier
`WorldCanvas.text(String, double, double, double, int, float)`	`void`	Text facing the camera, centred on the point; `scale` 1 is the game's label size.	`0.1.0-alpha.4` or earlier
`WorldPainter.paint(WorldCanvas)`	`void`	Draws this frame's shapes on `canvas`.	`0.1.0-alpha.4` or earlier

command

Function	Returns	Description	Since
`ArgumentCommand.type()`	`CommandArgumentType`	What the argument accepts.	`0.1.0-alpha.4` or earlier
`CommandAction.run(CommandContext)`	`int`	Runs the command.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.blockPos()`	`CommandArgumentType`	Block coordinates.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.bool()`	`CommandArgumentType`	`true` or `false`.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.decimal()`	`CommandArgumentType`	Any decimal number.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.greedyString()`	`CommandArgumentType`	The rest of the command line.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.integer()`	`CommandArgumentType`	Any whole number.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.integer(int, int)`	`CommandArgumentType`	A whole number in `[min, max]`.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.player()`	`CommandArgumentType`	One online player.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.string()`	`CommandArgumentType`	A word or quoted text.	`0.1.0-alpha.4` or earlier
`CommandArgumentType.word()`	`CommandArgumentType`	A single word.	`0.1.0-alpha.4` or earlier
`CommandContext.getBlockPos(String)`	`BlockPos`	Value of a `CommandArgumentType.blockPos()` argument, resolved against the source.	`0.1.0-alpha.4` or earlier
`CommandContext.getBoolean(String)`	`boolean`	Value of a `CommandArgumentType.bool()` argument.	`0.1.0-alpha.4` or earlier
`CommandContext.getDouble(String)`	`double`	Value of a `CommandArgumentType.decimal()` argument.	`0.1.0-alpha.4` or earlier
`CommandContext.getInteger(String)`	`int`	Value of an `CommandArgumentType.integer()` argument.	`0.1.0-alpha.4` or earlier
`CommandContext.getPlayer(String)`	`PlayerView`	Value of a `CommandArgumentType.player()` argument.	`0.1.0-alpha.4` or earlier
`CommandContext.getString(String)`	`String`	Value of a text argument.	`0.1.0-alpha.4` or earlier
`CommandContext.source()`	`CommandSource`	Who ran the command.	`0.1.0-alpha.4` or earlier
`CommandFailure.CommandFailure(String)`	new instance	Creates a failure with the message shown to the user.	`0.1.0-alpha.4` or earlier
`CommandNode.action()`	`Optional<CommandAction>`	The action run when the command ends here.	`0.1.0-alpha.4` or earlier
`CommandNode.argument(String, CommandArgumentType)`	`ArgumentCommand`	A typed value; read it in actions with `context.get*(name)`.	`0.1.0-alpha.4` or earlier
`CommandNode.children()`	`List<CommandNode<?>>`	Child nodes in registration order.	`0.1.0-alpha.4` or earlier
`CommandNode.executes(CommandAction)`	`N`	Lets the command end at this node and run `action`.	`0.1.0-alpha.4` or earlier
`CommandNode.literal(String)`	`LiteralCommand`	A fixed word, for example `/hello`.	`0.1.0-alpha.4` or earlier
`CommandNode.name()`	`String`	The word or argument name.	`0.1.0-alpha.4` or earlier
`CommandNode.permissionLevel()`	`int`	Required permission level, 0–4.	`0.1.0-alpha.4` or earlier
`CommandNode.permissionNode()`	`Optional<PermissionNode>`	The required named permission, if any (checked in addition to the level).	`0.1.0-alpha.4` or earlier
`CommandNode.requiresPermission(PermissionNode)`	`N`	Only sources that have `node` can see and run this node.	`0.1.0-alpha.4` or earlier
`CommandNode.requiresPermission(int)`	`N`	Only sources with at least this permission level can see and run this node: 0 everyone, 2 game masters (command blocks, operators), 4 server owners.	`0.1.0-alpha.4` or earlier
`CommandNode.then(CommandNode<?>)`	`N`	Adds a child that may follow this node.	`0.1.0-alpha.4` or earlier
`CommandRegistrar.register(LiteralCommand)`	`void`	Registers a top-level command.	`0.1.0-alpha.4` or earlier
`CommandSource.blockPos()`	`BlockPos`	The block position the command runs at.	`0.1.0-alpha.4` or earlier
`CommandSource.hasPermission(PermissionNode)`	`boolean`	Whether the source has the permission: for players as `PlayerView.hasPermission`; for the console, command blocks, and functions by the node's default level.	`0.1.0-alpha.4` or earlier
`CommandSource.hasPermission(int)`	`boolean`	Whether the source has at least permission `level` (0–4).	`0.1.0-alpha.4` or earlier
`CommandSource.name()`	`String`	Display name, for example a player name or `Server`.	`0.1.0-alpha.4` or earlier
`CommandSource.player()`	`Optional<PlayerView>`	The player who ran the command, if a player did.	`0.1.0-alpha.4` or earlier
`CommandSource.sendFailure(String)`	`void`	Sends an error message (shown in red to players).	`0.1.0-alpha.4` or earlier
`CommandSource.sendMessage(String)`	`void`	Sends feedback text to the source.	`0.1.0-alpha.4` or earlier
`CommandSource.world()`	`WorldView`	The world the command runs in.	`0.1.0-alpha.4` or earlier

content

Function	Returns	Description	Since
`AdvancementTrigger.id()`	`ResourceId`	The trigger ID used in advancement files.	`0.1.0-alpha.4` or earlier
`AdvancementTrigger.trigger(PlayerView)`	`void`	Meets every criterion with this trigger for `player`.	`0.1.0-alpha.4` or earlier
`ContentHandle.id()`	`ResourceId`	The content's ID, `<mod id>:<path>`.	`0.1.0-alpha.4` or earlier
`ContentHandle.isRegistered()`	`boolean`	Whether the game has created and registered the content yet.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.addToTag(TagKey, ResourceId[])`	`void`	Adds entries to a tag of any namespace, as a tag file with `"replace": false` in the mod jar would; Poly Mod Loader writes them to its generated data pack.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.advancementTrigger(String)`	`AdvancementTrigger`	Declares an advancement criterion trigger `<mod id>:<path>`.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.block(String, BlockDefinition)`	`BlockHandle`	Declares a block; unless the definition says otherwise, a block item with the same ID is declared too.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.booleanRule(String, boolean, GameRuleCategory)`	`GameRuleKey<Boolean>`	Declares a boolean game rule.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.creativeTab(String, CreativeTabDefinition)`	`ContentHandle`	Declares a creative inventory tab `<mod id>:<path>`, titled by the translation of `itemGroup.<mod id>.<path>`.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.effect(String, EffectDefinition)`	`EffectHandle`	Declares a status effect usable with `/effect` and `LivingEntityView.addEffect`.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.entity(String, EntityDefinition)`	`EntityHandle`	Declares a mob type; with `spawnEgg` also an item `<path>_spawn_egg`.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.entityData(String, EntityDataOptions)`	`EntityDataKey`	Declares data that entities carry, with synchronisation and version options.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.entityData(String, boolean)`	`EntityDataKey`	Declares data that entities carry; see `EntityDataKey`.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.integerRule(String, int, int, int, GameRuleCategory)`	`GameRuleKey<Integer>`	Declares an integer game rule limited to `[min, max]`.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.item(String, ItemDefinition)`	`ItemHandle`	Declares an item.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.itemComponent(String, ComponentType<T>)`	`ItemComponentKey<T>`	Declares a data component that item stacks can carry.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.particle(String, ParticleDefinition)`	`ContentHandle`	Declares a particle type, spawnable with `WorldView.spawnParticles` and `/particle`.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.projectile(String, ProjectileDefinition)`	`EntityHandle`	Declares a thrown projectile type.	`0.1.0-alpha.4` or earlier
`ContentRegistrar.sound(String)`	`SoundHandle`	Declares a sound event.	`0.1.0-alpha.4` or earlier
`CreativeTabDefinition.Builder.build()`	`CreativeTabDefinition`	Builds the definition.	`0.1.0-alpha.4` or earlier
`CreativeTabDefinition.Builder.entries(ResourceId[])`	`CreativeTabDefinition.Builder`	Adds items to the end of the tab, in order.	`0.1.0-alpha.4` or earlier
`CreativeTabDefinition.Builder.entry(ResourceId)`	`CreativeTabDefinition.Builder`	Adds an item to the end of the tab.	`0.1.0-alpha.4` or earlier
`CreativeTabDefinition.Builder.icon(ResourceId)`	`CreativeTabDefinition.Builder`	Sets the item shown on the tab.	`0.1.0-alpha.4` or earlier
`CreativeTabDefinition.builder()`	`CreativeTabDefinition.Builder`	A builder for a tab without entries yet.	`0.1.0-alpha.4` or earlier
`CreativeTabDefinition.iconOrFirstEntry()`	`ResourceId`	The icon: the declared one or the first entry.	`0.1.0-alpha.4` or earlier
`EntityDataKey.syncToOwner()`	`boolean`	Whether a player's own client receives the player's data.	`0.1.0-alpha.4` or earlier
`EntityDataOptions.syncedToOwner()`	`EntityDataOptions`	A copy whose data a player's own client receives.	`0.1.0-alpha.4` or earlier
`EntityDataOptions.syncedToTrackers()`	`EntityDataOptions`	A copy whose data every client that can see the entity receives.	`0.1.0-alpha.4` or earlier
`EntityDataOptions.withVersion(int, DataMigration)`	`EntityDataOptions`	A copy with data version `value`; `upgrade` converts data saved with an older version.	`0.1.0-alpha.4` or earlier

content.block

Function	Returns	Description	Since
`BlockBehavior.onNeighborChanged(WorldView, BlockPos)`	`void`	A neighbouring block changed (server and client); typical for redstone-like reactions.	`0.1.0-alpha.4` or earlier
`BlockBehavior.onPlaced(WorldView, BlockPos, EntityView)`	`void`	The block was placed by an entity (server and client).	`0.1.0-alpha.4` or earlier
`BlockBehavior.onRandomTick(WorldView, BlockPos)`	`void`	A random tick reached the block (server only, about every 68 seconds per block at the default `randomTickSpeed`).	`0.1.0-alpha.4` or earlier
`BlockBehavior.onSteppedOn(WorldView, BlockPos, EntityView)`	`void`	An entity walks on top of the block.	`0.1.0-alpha.4` or earlier
`BlockBehavior.onUse(BlockUse)`	`InteractionResult`	A player used the block with an empty hand.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.behavior(BlockBehavior)`	`BlockDefinition.Builder`	Sets the interaction callbacks.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.blockEntity(BlockEntityDefinition)`	`BlockDefinition.Builder`	Gives the block per-position saved state.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.build()`	`BlockDefinition`	Creates the definition; invalid values throw `IllegalArgumentException`.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.collisionShape(BlockShape)`	`BlockDefinition.Builder`	What entities collide with, when it differs from `shape`: a low fence-like box, for example.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.collisionShape(Function<BlockStateView,BlockShape>)`	`BlockDefinition.Builder`	What entities collide with, computed from the state.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.facesPlayerWhenPlaced(BlockProperty.DirectionProperty)`	`BlockDefinition.Builder`	Adds `facing` as a property and sets it on placement so the block faces the player.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.friction(float)`	`BlockDefinition.Builder`	Sets the friction (0.6 default, 0.98 ice).	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.item(ItemDefinition)`	`BlockDefinition.Builder`	Sets the properties of the block item declared with the block.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.lightLevel(ToIntFunction<BlockStateView>)`	`BlockDefinition.Builder`	Computes the emitted light from each state, for example `state -> state.get(LIT) ? 15 : 0`.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.lightLevel(int)`	`BlockDefinition.Builder`	Sets the emitted light level, 0–15.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.noCollision()`	`BlockDefinition.Builder`	Entities pass through the block.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.noItem()`	`BlockDefinition.Builder`	Declares no block item.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.noOcclusion()`	`BlockDefinition.Builder`	The block does not hide its neighbours' faces (glass-like blocks).	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.properties(BlockProperty<?>[])`	`BlockDefinition.Builder`	Adds block state properties; their default values form the default state.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.randomTicks()`	`BlockDefinition.Builder`	The block receives random ticks.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.requiresCorrectTool()`	`BlockDefinition.Builder`	The block drops only when mined with the correct tool.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.shape(BlockShape)`	`BlockDefinition.Builder`	The block's outline and collision: a slab, a post, a pipe.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.shape(Function<BlockStateView,BlockShape>)`	`BlockDefinition.Builder`	The block's outline and collision computed from the state, for example turned with `BlockShape.facing` by a facing property.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.sound(BlockSound)`	`BlockDefinition.Builder`	Sets the sound type.	`0.1.0-alpha.4` or earlier
`BlockDefinition.Builder.strength(float, float)`	`BlockDefinition.Builder`	Sets hardness and explosion resistance (stone is 1.5 / 6.0).	`0.1.0-alpha.4` or earlier
`BlockDefinition.builder()`	`BlockDefinition.Builder`	A builder with the game's defaults for a plain stone-like block that has a block item.	`0.1.0-alpha.4` or earlier
`BlockShape.box(double, double, double, double, double, double)`	`BlockShape`	One box, in pixels.	`0.1.0-alpha.4` or earlier
`BlockShape.facing(Direction)`	`BlockShape`	This shape, drawn facing north, turned around the block's vertical axis to face `facing`.	`0.1.0-alpha.4` or earlier
`BlockShape.or(BlockShape)`	`BlockShape`	This shape together with `other`.	`0.1.0-alpha.4` or earlier

content.block.entity

Function	Returns	Description	Since
`BlockEntityDefinition.Builder.build()`	`BlockEntityDefinition`	Creates the definition.	`0.1.0-alpha.4` or earlier
`BlockEntityDefinition.Builder.dataVersion(int, DataMigration)`	`BlockEntityDefinition.Builder`	Sets the data version; block entities saved with an older one run `upgrade` on load.	`0.1.0-alpha.4` or earlier
`BlockEntityDefinition.Builder.inventory(int, String)`	`BlockEntityDefinition.Builder`	Adds an inventory of `rows` × 9 slots with a menu titled `title`.	`0.1.0-alpha.4` or earlier
`BlockEntityDefinition.Builder.menu(MenuLayout, String)`	`BlockEntityDefinition.Builder`	Adds an inventory with one slot per layout slot, shown in a menu with that layout.	`0.1.0-alpha.4` or earlier
`BlockEntityDefinition.Builder.syncToClients()`	`BlockEntityDefinition.Builder`	Sends data changes to clients when `BlockEntityView.markChanged()` is called.	`0.1.0-alpha.4` or earlier
`BlockEntityDefinition.Builder.ticker(BlockEntityTicker)`	`BlockEntityDefinition.Builder`	Runs `ticker` on the server every tick.	`0.1.0-alpha.4` or earlier
`BlockEntityDefinition.builder()`	`BlockEntityDefinition.Builder`	A builder for a block entity with data only.	`0.1.0-alpha.4` or earlier
`BlockEntityDefinition.inventorySize()`	`int`	Number of inventory slots: from the layout, or rows × 9.	`0.1.0-alpha.4` or earlier
`BlockEntityTicker.tick(BlockEntityView)`	`void`	Called on the server thread; `entity` is valid only during the call.	`0.1.0-alpha.4` or earlier
`BlockEntityView.data()`	`DataTree`	Its saved data; call `markChanged()` after changing it.	`0.1.0-alpha.4` or earlier
`BlockEntityView.inventory()`	`Optional<InventoryView>`	Its inventory, when the definition has one.	`0.1.0-alpha.4` or earlier
`BlockEntityView.markChanged()`	`void`	Marks the data for saving and, for synchronised block entities, sends it to clients.	`0.1.0-alpha.4` or earlier
`BlockEntityView.pos()`	`BlockPos`	Its position.	`0.1.0-alpha.4` or earlier
`BlockEntityView.world()`	`WorldView`	The world it is in.	`0.1.0-alpha.4` or earlier
`MenuLayout.Builder.background(ResourceId)`	`MenuLayout.Builder`	Draws `texture` instead of the plain panel.	`0.1.0-alpha.4` or earlier
`MenuLayout.Builder.build()`	`MenuLayout`	Creates the layout; invalid values throw `IllegalArgumentException`.	`0.1.0-alpha.4` or earlier
`MenuLayout.Builder.grid(int, int, int, int)`	`MenuLayout.Builder`	Adds a `columns` × `rows` grid of slots with 18-pixel spacing.	`0.1.0-alpha.4` or earlier
`MenuLayout.Builder.outputSlot(int, int)`	`MenuLayout.Builder`	Adds a slot players can only take from.	`0.1.0-alpha.4` or earlier
`MenuLayout.Builder.playerInventory(int, int)`	`MenuLayout.Builder`	Moves the player's inventory (default `8, height - 82`).	`0.1.0-alpha.4` or earlier
`MenuLayout.Builder.progressBar(int, int, MenuLayout.ProgressStyle, String, String)`	`MenuLayout.Builder`	Adds a progress bar.	`0.1.0-alpha.4` or earlier
`MenuLayout.Builder.slot(int, int)`	`MenuLayout.Builder`	Adds a slot.	`0.1.0-alpha.4` or earlier
`MenuLayout.builder(int, int)`	`MenuLayout.Builder`	A builder for a `width` × `height` menu with the inventory at the game's usual place.	`0.1.0-alpha.4` or earlier

content.block.state

Function	Returns	Description	Since
`BlockProperty.BooleanProperty.defaultValue()`	`Boolean`	Value of the block's default state.	`0.1.0-alpha.4` or earlier
`BlockProperty.BooleanProperty.name()`	`String`	Property name used in blockstate files and commands.	`0.1.0-alpha.4` or earlier
`BlockProperty.BooleanProperty.values()`	`List<Boolean>`	Every allowed value, in the game's order.	`0.1.0-alpha.4` or earlier
`BlockProperty.BooleanProperty.withDefault(boolean)`	`BlockProperty.BooleanProperty`	The same property with another default.	`0.1.0-alpha.4` or earlier
`BlockProperty.ChoiceProperty.defaultValue()`	`String`	Value of the block's default state.	`0.1.0-alpha.4` or earlier
`BlockProperty.ChoiceProperty.name()`	`String`	Property name used in blockstate files and commands.	`0.1.0-alpha.4` or earlier
`BlockProperty.ChoiceProperty.values()`	`List<String>`	Every allowed value, in the game's order.	`0.1.0-alpha.4` or earlier
`BlockProperty.ChoiceProperty.withDefault(String)`	`BlockProperty.ChoiceProperty`	The same property with another default.	`0.1.0-alpha.4` or earlier
`BlockProperty.DirectionProperty.defaultValue()`	`Direction`	Value of the block's default state.	`0.1.0-alpha.4` or earlier
`BlockProperty.DirectionProperty.name()`	`String`	Property name used in blockstate files and commands.	`0.1.0-alpha.4` or earlier
`BlockProperty.DirectionProperty.values()`	`List<Direction>`	Every allowed value, in the game's order.	`0.1.0-alpha.4` or earlier
`BlockProperty.DirectionProperty.withDefault(Direction)`	`BlockProperty.DirectionProperty`	The same property with another default.	`0.1.0-alpha.4` or earlier
`BlockProperty.IntegerProperty.defaultValue()`	`Integer`	Value of the block's default state.	`0.1.0-alpha.4` or earlier
`BlockProperty.IntegerProperty.name()`	`String`	Property name used in blockstate files and commands.	`0.1.0-alpha.4` or earlier
`BlockProperty.IntegerProperty.values()`	`List<Integer>`	Every allowed value, in the game's order.	`0.1.0-alpha.4` or earlier
`BlockProperty.IntegerProperty.withDefault(int)`	`BlockProperty.IntegerProperty`	The same property with another default.	`0.1.0-alpha.4` or earlier
`BlockProperty.bool(String)`	`BlockProperty.BooleanProperty`	A `true`/`false` property, default `false`.	`0.1.0-alpha.4` or earlier
`BlockProperty.choice(String, String[])`	`BlockProperty.ChoiceProperty`	A property with named values, in this order; the first is the default.	`0.1.0-alpha.4` or earlier
`BlockProperty.defaultValue()`	`T`	Value of the block's default state.	`0.1.0-alpha.4` or earlier
`BlockProperty.direction(String)`	`BlockProperty.DirectionProperty`	Any of the six directions, default north.	`0.1.0-alpha.4` or earlier
`BlockProperty.horizontalFacing(String)`	`BlockProperty.DirectionProperty`	A horizontal facing (`north`, `south`, `west`, `east`), default north.	`0.1.0-alpha.4` or earlier
`BlockProperty.integer(String, int, int)`	`BlockProperty.IntegerProperty`	A whole-number property in `[min, max]` with `0 <= min < max <= min + 255`, default `min`.	`0.1.0-alpha.4` or earlier
`BlockProperty.name()`	`String`	Property name used in blockstate files and commands.	`0.1.0-alpha.4` or earlier
`BlockProperty.values()`	`List<T>`	Every allowed value, in the game's order.	`0.1.0-alpha.4` or earlier
`BlockStateView.block()`	`ResourceId`	The block, for example `minecraft:furnace`.	`0.1.0-alpha.4` or earlier
`BlockStateView.find(BlockProperty<T>)`	`Optional<T>`	The property's value, or empty when the block has no such property.	`0.1.0-alpha.4` or earlier
`BlockStateView.get(BlockProperty<T>)`	`T`	The property's value.	`0.1.0-alpha.4` or earlier
`BlockStateView.has(BlockProperty<?>)`	`boolean`	Whether the block has a property with this name and value type.	`0.1.0-alpha.4` or earlier
`BlockStateView.with(BlockProperty<T>, T)`	`BlockStateView`	This state with one property changed; this snapshot stays as it is.	`0.1.0-alpha.4` or earlier

content.effect

Function	Returns	Description	Since
`EffectBehavior.onTick(LivingEntityView, int)`	`void`	Called on the server every `tickInterval` ticks while the entity has the effect.	`0.1.0-alpha.4` or earlier

content.entity

Function	Returns	Description	Since
`AiGoal.canStart(MobView)`	`boolean`	Whether the goal should start now.	`0.1.0-alpha.4` or earlier
`AiGoal.controls()`	`Set<GoalControl>`	The controls this goal needs while it runs; default `GoalControl.MOVE`.	`0.1.0-alpha.4` or earlier
`AiGoal.shouldContinue(MobView)`	`boolean`	Whether a running goal keeps running; default `canStart`.	`0.1.0-alpha.4` or earlier
`AiGoal.start(MobView)`	`void`	The goal started.	`0.1.0-alpha.4` or earlier
`AiGoal.stop(MobView)`	`void`	The goal stopped or was interrupted.	`0.1.0-alpha.4` or earlier
`AiGoal.tick(MobView)`	`void`	Every tick while running.	`0.1.0-alpha.4` or earlier
`EntityBehavior.onInteract(EntityInteraction)`	`InteractionResult`	A player used the mob (both sides; check `world().isClientSide()`).	`0.1.0-alpha.4` or earlier
`EntityBehavior.onServerTick(LivingEntityView)`	`void`	Every server tick while the mob is alive.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.attackPlayers(double)`	`EntityDefinition.Builder`	The mob chases and hits players for `damage`.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.behavior(EntityBehavior)`	`EntityDefinition.Builder`	Callbacks for ticks and interaction.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.build()`	`EntityDefinition`	Creates the definition; invalid values throw `IllegalArgumentException`.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.category(MobCategory)`	`EntityDefinition.Builder`	Spawn group; `MobCategory.CREATURE` by default.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.flying(double)`	`EntityDefinition.Builder`	The mob flies and hovers (`Movement.FLY`) at `flyingSpeed` (parrot 0.4) in the air; `movementSpeed` still applies on the ground.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.goal(int, Supplier<AiGoal>)`	`EntityDefinition.Builder`	Adds an AI goal created for each mob by `factory`.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.maxHealth(double)`	`EntityDefinition.Builder`	Health in half-hearts; 20 by default.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.model(EntityModelDefinition)`	`EntityDefinition.Builder`	Draws the mob with a box model instead of the player-shaped one.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.movementSpeed(double)`	`EntityDefinition.Builder`	Base speed (zombie 0.23, villager 0.5); 0.25 by default.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.noGravity()`	`EntityDefinition.Builder`	The mob is not pulled down by gravity.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.noWandering()`	`EntityDefinition.Builder`	The mob stands still.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.notPushable()`	`EntityDefinition.Builder`	Other entities do not push the mob.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.panicWhenHurt()`	`EntityDefinition.Builder`	The mob runs away for a while after being hurt.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.rideable(boolean)`	`EntityDefinition.Builder`	Players can ride the mob; with `steerable` they also steer it.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.size(float, float)`	`EntityDefinition.Builder`	Hitbox width and height in blocks.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.spawnEgg(CreativeTab)`	`EntityDefinition.Builder`	Declares a spawn egg item `<id>_spawn_egg` listed in `tab`.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.spawnsNaturally(BiomeSelector, int, int, int)`	`EntityDefinition.Builder`	The mob spawns by itself in `biomes`, in groups of `minGroup..maxGroup`.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.swimming()`	`EntityDefinition.Builder`	The mob swims under water (`Movement.SWIM`) at `movementSpeed`.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.targetGoal(int, Supplier<AiGoal>)`	`EntityDefinition.Builder`	Adds a target goal (chooses whom to attack) created for each mob by `factory`.	`0.1.0-alpha.4` or earlier
`EntityDefinition.Builder.temptedBy(ResourceId)`	`EntityDefinition.Builder`	The mob follows players holding `item`.	`0.1.0-alpha.4` or earlier
`EntityDefinition.builder(ResourceId)`	`EntityDefinition.Builder`	A builder for a 0.6×1.95 creature (player-sized) with the given skin texture.	`0.1.0-alpha.4` or earlier
`ProjectileBehavior.onHitBlock(ProjectileHit)`	`void`	The projectile hit a block.	`0.1.0-alpha.4` or earlier
`ProjectileBehavior.onHitEntity(ProjectileHit)`	`void`	The projectile hit an entity, after its damage was dealt.	`0.1.0-alpha.4` or earlier
`ProjectileDefinition.Builder.behavior(ProjectileBehavior)`	`ProjectileDefinition.Builder`	Callbacks for hitting blocks and entities.	`0.1.0-alpha.4` or earlier
`ProjectileDefinition.Builder.build()`	`ProjectileDefinition`	Creates the definition; invalid values throw `IllegalArgumentException`.	`0.1.0-alpha.4` or earlier
`ProjectileDefinition.Builder.damage(float)`	`ProjectileDefinition.Builder`	Damage to a hit entity, 0 for none.	`0.1.0-alpha.4` or earlier
`ProjectileDefinition.Builder.gravity(double)`	`ProjectileDefinition.Builder`	Downward acceleration per tick (snowball 0.03).	`0.1.0-alpha.4` or earlier
`ProjectileDefinition.Builder.size(float)`	`ProjectileDefinition.Builder`	Hitbox width and height in blocks.	`0.1.0-alpha.4` or earlier
`ProjectileDefinition.builder(ResourceId)`	`ProjectileDefinition.Builder`	A builder for a 0.25-block projectile drawn as `item`, with snowball gravity and no damage.	`0.1.0-alpha.4` or earlier

content.entity.model

Function	Returns	Description	Since
`EntityModelDefinition.Builder.animation(String, KeyframeAnimation)`	`EntityModelDefinition.Builder`	Adds a keyframe animation called `name`; `KeyframeAnimation.Trigger.ON_DEMAND` ones are started by name with `MobView.playAnimation`.	`0.1.0-alpha.4` or earlier
`EntityModelDefinition.Builder.build()`	`EntityModelDefinition`	Creates the model; invalid parts throw `IllegalArgumentException`.	`0.1.0-alpha.4` or earlier
`EntityModelDefinition.Builder.part(String, Consumer<ModelPartDefinition.Builder>)`	`EntityModelDefinition.Builder`	Adds a part configured by `part`.	`0.1.0-alpha.4` or earlier
`EntityModelDefinition.builder(int, int)`	`EntityModelDefinition.Builder`	A builder for a model using a `textureWidth × textureHeight` texture.	`0.1.0-alpha.4` or earlier
`EntityModelDefinition.onDemandAnimations()`	`List<String>`	Names of the `KeyframeAnimation.Trigger.ON_DEMAND` animations, in declaration order.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.Builder.build()`	`KeyframeAnimation`	Creates the animation; invalid values throw `IllegalArgumentException`.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.Builder.keyframe(String, KeyframeAnimation.Target, float, float, float, float, KeyframeAnimation.Interpolation)`	`KeyframeAnimation.Builder`	Adds a keyframe with every detail given.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.Builder.looping()`	`KeyframeAnimation.Builder`	Starts over at the end.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.Builder.position(String, float, float, float, float)`	`KeyframeAnimation.Builder`	Moves `part` by `x, y, z` model pixels (y up) at `time` seconds.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.Builder.rotation(String, float, float, float, float)`	`KeyframeAnimation.Builder`	Rotates `part` by `x, y, z` degrees at `time` seconds.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.Builder.scale(String, float, float, float, float)`	`KeyframeAnimation.Builder`	Scales `part` by `x, y, z` (1 keeps the size) at `time` seconds.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.Builder.smooth()`	`KeyframeAnimation.Builder`	Blends the keyframes added after this call along smooth curves instead of straight lines.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.Builder.trigger(KeyframeAnimation.Trigger)`	`KeyframeAnimation.Builder`	When the animation plays; `Trigger.ON_DEMAND` by default.	`0.1.0-alpha.4` or earlier
`KeyframeAnimation.builder(float)`	`KeyframeAnimation.Builder`	A builder for an animation `lengthSeconds` long that plays when the server starts it.	`0.1.0-alpha.4` or earlier
`ModelPartDefinition.Builder.animation(PartAnimation)`	`ModelPartDefinition.Builder`	How the part moves on its own; `PartAnimation.NONE` by default.	`0.1.0-alpha.4` or earlier
`ModelPartDefinition.Builder.box(int, int, float, float, float, float, float, float)`	`ModelPartDefinition.Builder`	Adds a box whose texture net starts at `u, v`.	`0.1.0-alpha.4` or earlier
`ModelPartDefinition.Builder.mirroredBox(int, int, float, float, float, float, float, float)`	`ModelPartDefinition.Builder`	Adds a box with a mirrored texture.	`0.1.0-alpha.4` or earlier
`ModelPartDefinition.Builder.parent(String)`	`ModelPartDefinition.Builder`	Attaches the part to `parent`; its pivot becomes relative to the parent's.	`0.1.0-alpha.4` or earlier
`ModelPartDefinition.Builder.pivot(float, float, float)`	`ModelPartDefinition.Builder`	The point the part turns around, relative to the parent's pivot (model pixels, y down).	`0.1.0-alpha.4` or earlier
`ModelPartDefinition.Builder.rotation(float, float, float)`	`ModelPartDefinition.Builder`	Rest rotation in degrees.	`0.1.0-alpha.4` or earlier

content.item

Function	Returns	Description	Since
`ComponentType.valueClass()`	`Class<T>`	Java type of the value.	`0.1.0-alpha.4` or earlier
`ItemBehavior.onUse(ItemUse)`	`InteractionResult`	The item was used in the air.	`0.1.0-alpha.4` or earlier
`ItemDefinition.Builder.behavior(ItemBehavior)`	`ItemDefinition.Builder`	Sets the use callbacks.	`0.1.0-alpha.4` or earlier
`ItemDefinition.Builder.build()`	`ItemDefinition`	Creates the definition; invalid values throw `IllegalArgumentException`.	`0.1.0-alpha.4` or earlier
`ItemDefinition.Builder.creativeTab(CreativeTab)`	`ItemDefinition.Builder`	Lists the item at the end of a creative inventory tab.	`0.1.0-alpha.4` or earlier
`ItemDefinition.Builder.durability(int)`	`ItemDefinition.Builder`	Gives the item durability; also sets the stack size to 1.	`0.1.0-alpha.4` or earlier
`ItemDefinition.Builder.fireResistant()`	`ItemDefinition.Builder`	The dropped item survives fire and lava.	`0.1.0-alpha.4` or earlier
`ItemDefinition.Builder.food(FoodDefinition)`	`ItemDefinition.Builder`	Makes the item edible.	`0.1.0-alpha.4` or earlier
`ItemDefinition.Builder.maxStackSize(int)`	`ItemDefinition.Builder`	Sets the maximum stack size, 1–99.	`0.1.0-alpha.4` or earlier
`ItemDefinition.Builder.rarity(ItemRarity)`	`ItemDefinition.Builder`	Sets the name colour.	`0.1.0-alpha.4` or earlier
`ItemDefinition.builder()`	`ItemDefinition.Builder`	A builder for a common item stacking to 64, listed in no tab.	`0.1.0-alpha.4` or earlier

content.particle

Function	Returns	Description	Since
`ParticleDefinition.asGlowing()`	`ParticleDefinition`	A copy drawn at full brightness, also in the dark.	`0.1.0-alpha.4` or earlier
`ParticleDefinition.of(int)`	`ParticleDefinition`	Lives `lifetimeTicks`, no gravity, default size, normal lighting, no tint.	`0.1.0-alpha.4` or earlier
`ParticleDefinition.withGravity(float)`	`ParticleDefinition`	A copy with this downward acceleration (0 floats).	`0.1.0-alpha.4` or earlier
`ParticleDefinition.withScale(float)`	`ParticleDefinition`	A copy with this size multiplier.	`0.1.0-alpha.4` or earlier
`ParticleDefinition.withTint(int)`	`ParticleDefinition`	A copy with this colour, `0xRRGGBB`, multiplied into the sprite.	`0.1.0-alpha.4` or earlier

data

Function	Returns	Description	Since
`DataMigration.migrate(DataTree, int)`	`void`	Upgrades `data` from `fromVersion` to the current version.	`0.1.0-alpha.4` or earlier
`DataTree.child(String)`	`DataTree`	The child tree under `key`, creating it (and replacing a non-tree value) if needed.	`0.1.0-alpha.4` or earlier
`DataTree.clear()`	`void`	Removes every entry.	`0.1.0-alpha.4` or earlier
`DataTree.copy()`	`DataTree`	A deep copy.	`0.1.0-alpha.4` or earlier
`DataTree.create()`	`DataTree`	An empty tree.	`0.1.0-alpha.4` or earlier
`DataTree.findChild(String)`	`Optional<DataTree>`	The child tree under `key`, without creating it.	`0.1.0-alpha.4` or earlier
`DataTree.getBoolean(String, boolean)`	`boolean`	The boolean under `key`, or `fallback` if there is none.	`0.1.0-alpha.4` or earlier
`DataTree.getBytes(String)`	`Optional<byte[]>`	A copy of the stored bytes.	`0.1.0-alpha.4` or earlier
`DataTree.getDouble(String, double)`	`double`	The double under `key`, or `fallback` if there is none.	`0.1.0-alpha.4` or earlier
`DataTree.getInt(String, int)`	`int`	The integer under `key`, or `fallback` if there is none.	`0.1.0-alpha.4` or earlier
`DataTree.getLong(String, long)`	`long`	The long under `key`, or `fallback` if there is none.	`0.1.0-alpha.4` or earlier
`DataTree.getString(String, String)`	`String`	The string under `key`, or `fallback` if there is none.	`0.1.0-alpha.4` or earlier
`DataTree.has(String)`	`boolean`	Whether any value is stored under `key`.	`0.1.0-alpha.4` or earlier
`DataTree.keys()`	`Set<String>`	Keys in insertion order.	`0.1.0-alpha.4` or earlier
`DataTree.putBoolean(String, boolean)`	`DataTree`	Stores a boolean under `key`; returns this tree.	`0.1.0-alpha.4` or earlier
`DataTree.putBytes(String, byte[])`	`DataTree`	Stores a copy of `value` under `key`; returns this tree.	`0.1.0-alpha.4` or earlier
`DataTree.putDouble(String, double)`	`DataTree`	Stores a double under `key`; returns this tree.	`0.1.0-alpha.4` or earlier
`DataTree.putInt(String, int)`	`DataTree`	Stores an integer under `key`; returns this tree.	`0.1.0-alpha.4` or earlier
`DataTree.putLong(String, long)`	`DataTree`	Stores a long under `key`; returns this tree.	`0.1.0-alpha.4` or earlier
`DataTree.putString(String, String)`	`DataTree`	Stores a string under `key`; returns this tree.	`0.1.0-alpha.4` or earlier
`DataTree.raw(String)`	`Optional<Object>`	The raw value under `key`: `Integer`, `Long`, `Double`, `Boolean`, `String`, `byte[]` (shared, do not modify), or `DataTree`; empty when absent.	`0.1.0-alpha.4` or earlier
`DataTree.remove(String)`	`void`	Removes the value under `key`, if any.	`0.1.0-alpha.4` or earlier

devtools.gametest

Function	Returns	Description	Since
`GameTest.run(GameTestContext)`	`void`	Starts the test on the server thread.	`0.1.0-alpha.4` or earlier
`GameTestContext.absolute(BlockPos)`	`BlockPos`	Converts a test-relative position into a world position.	`0.1.0-alpha.4` or earlier
`GameTestContext.assertBlock(BlockPos, ResourceId)`	`void`	Fails unless the block at a test-relative position is `expected`.	`0.1.0-alpha.4` or earlier
`GameTestContext.assertTrue(boolean, String)`	`void`	Fails with `message` unless `condition` holds.	`0.1.0-alpha.4` or earlier
`GameTestContext.attackEntity(PlayerView, EntityView)`	`void`	Makes a server player attack `target` with its main hand, as a left-click does (interaction events, then damage and knockback).	`0.1.0-alpha.4` or earlier
`GameTestContext.breakBlock(PlayerView, BlockPos)`	`boolean`	Makes a server player break the block at a test-relative position at once, the way the server finishes a player's digging: block events, the game's checks, drops in survival mode.	`0.1.0-alpha.4` or earlier
`GameTestContext.createConnectedMockPlayer()`	`PlayerView`	Creates a survival-mode player that joins the server like a client over an in-memory connection (`PlayerEvents.JOINED` fires) and reports that it finished loading, so it can take damage.	`0.1.0-alpha.4` or earlier
`GameTestContext.createMockPlayer()`	`PlayerView`	Creates a survival-mode player in the test world that is not connected to any client.	`0.1.0-alpha.4` or earlier
`GameTestContext.createMockServerPlayer()`	`PlayerView`	Creates a survival-mode server player that is not connected and not in the world, for what needs one, such as advancements.	`0.1.0-alpha.4` or earlier
`GameTestContext.disconnect(PlayerView)`	`void`	Disconnects a player from `createConnectedMockPlayer()` (`PlayerEvents.LEAVING` fires); does nothing for a player that already left.	`0.1.0-alpha.4` or earlier
`GameTestContext.fail(String)`	`void`	Marks the test failed.	`0.1.0-alpha.4` or earlier
`GameTestContext.interactBlock(PlayerView, BlockPos, Direction)`	`InteractionResult`	Makes a server player (from `createMockServerPlayer()`) right-click a face of the block at a test-relative position with its main hand, the way the server handles the click from a connected client: interaction events first, then the held item and the block.	`0.1.0-alpha.4` or earlier
`GameTestContext.interactEntity(PlayerView, EntityView)`	`InteractionResult`	Makes a server player right-click `target` with its main hand, the way the server handles the click from a connected client (interaction events, then the entity and the item).	`0.1.0-alpha.4` or earlier
`GameTestContext.interactItem(PlayerView)`	`InteractionResult`	Makes a server player use the item in its main hand in the air, the way the server handles the click from a connected client (interaction events, then the item).	`0.1.0-alpha.4` or earlier
`GameTestContext.respawn(PlayerView, boolean)`	`PlayerView`	Respawns a player from `createConnectedMockPlayer()` as its client asks from the death screen (or after the End credits): the game builds a new player object, `PlayerEvents.COPY` and `RESPAWNED` fire, and the new player reports that it loaded.	`0.1.0-alpha.4` or earlier
`GameTestContext.runAfter(int, Runnable)`	`void`	Runs `action` after `ticks` more ticks, on the server thread.	`0.1.0-alpha.4` or earlier
`GameTestContext.runCommand(String)`	`int`	Runs a command as the server at the test area's origin.	`0.1.0-alpha.4` or earlier
`GameTestContext.setBlock(BlockPos, ResourceId)`	`void`	Places the default state of `block` at a test-relative position.	`0.1.0-alpha.4` or earlier
`GameTestContext.succeed()`	`void`	Marks the test passed.	`0.1.0-alpha.4` or earlier
`GameTestContext.useBlock(BlockPos, PlayerView)`	`void`	Makes `player` use (right-click) the block at a test-relative position with an empty hand.	`0.1.0-alpha.4` or earlier
`GameTestContext.world()`	`WorldView`	The world the test runs in.	`0.1.0-alpha.4` or earlier
`GameTestRegistrar.register(String, GameTest)`	`void`	Registers a required test that must finish within 100 ticks.	`0.1.0-alpha.4` or earlier
`GameTestRegistrar.register(String, int, GameTest)`	`void`	Registers a required test.	`0.1.0-alpha.4` or earlier
`GameTestRegistrar.register(String, int, TestArea, GameTest)`	`void`	Registers a required test that gets `area` to itself.	`0.1.0-alpha.4` or earlier
`TestArea.cube(int)`	`TestArea`	A `size × size × size` cube.	`0.1.0-alpha.4` or earlier

entity

Function	Returns	Description	Since
`EntityView.blockPos()`	`BlockPos`	The block the entity stands in.	`0.1.0-alpha.4` or earlier
`EntityView.changeDimension(ResourceId, double, double, double)`	`EntityView`	Moves the entity to another dimension, for example `minecraft:the_nether` or a mod dimension from data; server side only.	`0.1.0-alpha.4` or earlier
`EntityView.data(EntityDataKey)`	`StoredData`	The entity's data for `key`; call `markChanged()` after changing it.	`0.1.0-alpha.4` or earlier
`EntityView.hasNoGravity()`	`boolean`	Whether gravity is off for this entity.	`0.1.0-alpha.4` or earlier
`EntityView.isAlive()`	`boolean`	Whether the entity is alive and in a world.	`0.1.0-alpha.4` or earlier
`EntityView.isIn(TagKey)`	`boolean`	Whether the entity's type is in an entity type tag, for example `#minecraft:skeletons`.	`0.1.0-alpha.4` or earlier
`EntityView.isOnGround()`	`boolean`	Whether the entity stands on a block.	`0.1.0-alpha.4` or earlier
`EntityView.name()`	`String`	Display name as plain text.	`0.1.0-alpha.4` or earlier
`EntityView.passengers()`	`List<EntityView>`	Who rides the entity.	`0.1.0-alpha.4` or earlier
`EntityView.pitch()`	`float`	Vertical facing in degrees (-90 up, 90 down).	`0.1.0-alpha.4` or earlier
`EntityView.remove()`	`void`	Removes the entity without dropping loot; server side only.	`0.1.0-alpha.4` or earlier
`EntityView.setNoGravity(boolean)`	`void`	Turns gravity off or on.	`0.1.0-alpha.4` or earlier
`EntityView.setRotation(float, float)`	`void`	Turns the entity.	`0.1.0-alpha.4` or earlier
`EntityView.setVelocity(double, double, double)`	`void`	Sets the velocity; for players it reaches their client.	`0.1.0-alpha.4` or earlier
`EntityView.startRiding(EntityView)`	`boolean`	Mounts `vehicle`.	`0.1.0-alpha.4` or earlier
`EntityView.stopRiding()`	`void`	Dismounts, if riding.	`0.1.0-alpha.4` or earlier
`EntityView.teleport(double, double, double)`	`void`	Moves the entity within its dimension; server side only.	`0.1.0-alpha.4` or earlier
`EntityView.type()`	`ResourceId`	Entity type, for example `minecraft:pig`.	`0.1.0-alpha.4` or earlier
`EntityView.uuid()`	`UUID`	Unique, persistent entity ID.	`0.1.0-alpha.4` or earlier
`EntityView.vehicle()`	`Optional<EntityView>`	What the entity rides, if anything.	`0.1.0-alpha.4` or earlier
`EntityView.velocity()`	`Vector3`	Velocity in blocks per tick.	`0.1.0-alpha.4` or earlier
`EntityView.world()`	`WorldView`	The world the entity is in.	`0.1.0-alpha.4` or earlier
`EntityView.x()`	`double`	X coordinate.	`0.1.0-alpha.4` or earlier
`EntityView.y()`	`double`	Y coordinate (feet).	`0.1.0-alpha.4` or earlier
`EntityView.yaw()`	`float`	Horizontal facing in degrees (0 south, 90 west, 180 north, 270 east).	`0.1.0-alpha.4` or earlier
`EntityView.z()`	`double`	Z coordinate.	`0.1.0-alpha.4` or earlier
`LivingEntityView.addEffect(ResourceId, int, int)`	`void`	Adds a status effect, such as `minecraft:speed` or a mod effect.	`0.1.0-alpha.4` or earlier
`LivingEntityView.hasEffect(ResourceId)`	`boolean`	Whether the entity has the effect.	`0.1.0-alpha.4` or earlier
`LivingEntityView.health()`	`float`	Current health in half-hearts.	`0.1.0-alpha.4` or earlier
`LivingEntityView.hurt(ResourceId, float)`	`boolean`	Deals damage of a data-defined damage type, such as `minecraft:magic` or one from the mod's `data/<mod id>/damage_type/`.	`0.1.0-alpha.4` or earlier
`LivingEntityView.hurt(float)`	`boolean`	Deals generic damage on the server, as if from `/damage`.	`0.1.0-alpha.4` or earlier
`LivingEntityView.launchProjectile(ResourceId, float, float)`	`EntityView`	Launches a projectile, such as a mod projectile or `minecraft:snowball`, from the eyes in the look direction.	`0.1.0-alpha.4` or earlier
`LivingEntityView.maxHealth()`	`float`	Maximum health.	`0.1.0-alpha.4` or earlier
`LivingEntityView.setHealth(float)`	`void`	Sets health, clamped to `[0, maxHealth]`; server side only.	`0.1.0-alpha.4` or earlier
`MobView.isNavigating()`	`boolean`	Whether the mob is following a path.	`0.1.0-alpha.4` or earlier
`MobView.lookAt(double, double, double)`	`void`	Turns the head towards a position this tick.	`0.1.0-alpha.4` or earlier
`MobView.navigateTo(double, double, double, double)`	`boolean`	Starts walking to a position along a path.	`0.1.0-alpha.4` or earlier
`MobView.playAnimation(String)`	`void`	Plays one of the mob's `ON_DEMAND` model animations from the start on every client that sees the mob.	`0.1.0-alpha.4` or earlier
`MobView.setTarget(LivingEntityView)`	`void`	Sets the attack target, or clears it with `null`.	`0.1.0-alpha.4` or earlier
`MobView.stopAnimation(String)`	`void`	Stops an `ON_DEMAND` animation on every client; a non-looping one also stops by itself at its end.	`0.1.0-alpha.4` or earlier
`MobView.stopNavigating()`	`void`	Stops following the path.	`0.1.0-alpha.4` or earlier
`MobView.target()`	`Optional<LivingEntityView>`	The attack target, if any.	`0.1.0-alpha.4` or earlier
`PlayerView.countItem(ResourceId)`	`int`	How many of `item` the player carries in their inventory.	`0.1.0-alpha.4` or earlier
`PlayerView.give(ResourceId, int)`	`void`	Gives the player `count` of `item`; what does not fit is dropped at their feet.	`0.1.0-alpha.4` or earlier
`PlayerView.grantAdvancement(ResourceId)`	`boolean`	Completes every criterion of an advancement, with its rewards and announcement.	`0.1.0-alpha.4` or earlier
`PlayerView.hasAdvancement(ResourceId)`	`boolean`	Whether the player has completed an advancement, such as `minecraft:story/mine_stone`.	`0.1.0-alpha.4` or earlier
`PlayerView.hasPermission(PermissionNode)`	`boolean`	Whether the player has the permission: the first deciding provider, else the node's default operator level.	`0.1.0-alpha.4` or earlier
`PlayerView.inventory()`	`InventoryView`	The player's inventory: 36 main slots (hotbar 0–8), then armour and off hand.	`0.1.0-alpha.4` or earlier
`PlayerView.mainHandItem()`	`ResourceId`	The item in the main hand, `minecraft:air` when empty.	`0.1.0-alpha.4` or earlier
`PlayerView.mainHandStack()`	`ItemStackRef`	The live stack in the main hand.	`0.1.0-alpha.4` or earlier
`PlayerView.openMenu(BlockPos)`	`boolean`	Opens the menu of the block entity at `pos` (a chest-style or laid-out mod menu, or a game container such as a furnace) for this player.	`0.1.0-alpha.4` or earlier
`PlayerView.revokeAdvancement(ResourceId)`	`boolean`	Clears every criterion of an advancement.	`0.1.0-alpha.4` or earlier
`PlayerView.sendMessage(String)`	`void`	Shows `text` in the player's chat.	`0.1.0-alpha.4` or earlier

event

Function	Returns	Description	Since
`EventKey.id()`	`String`	Diagnostic ID, e.g.	`0.1.0-alpha.4` or earlier
`EventKey.listenerType()`	`Class<L>`	The listener interface.	`0.1.0-alpha.4` or earlier
`EventKey.of(String, Class<L>)`	`EventKey<L>`	Creates a key; `id` is `namespace:path` and only used for diagnostics.	`0.1.0-alpha.4` or earlier
`EventRegistry.register(EventKey<L>, EventPriority, L)`	`void`	Registers `listener` for `event`.	`0.1.0-alpha.4` or earlier
`EventRegistry.register(EventKey<L>, L)`	`void`	Registers `listener` for `event` with `EventPriority.NORMAL`.	`0.1.0-alpha.4` or earlier
`EventResult.isDecided()`	`boolean`	Whether this result decides the event, i.e. is not `PASS`.	`0.1.0-alpha.4` or earlier

event.block

Function	Returns	Description	Since
`BlockBreakListener.onBlockBreak(WorldView, BlockPos, ResourceId, PlayerView)`	`EventResult`	Called on the server thread before the block is removed.	`0.1.0-alpha.4` or earlier
`BlockBrokenListener.onBlockBroken(WorldView, BlockPos, ResourceId, PlayerView)`	`void`	Called on the server thread after the block was removed and its drops spawned.	`0.1.0-alpha.4` or earlier
`BlockPlaceListener.onBlockPlace(WorldView, BlockPos, ResourceId, PlayerView)`	`EventResult`	Called on the server thread after the game checked that the block fits, before it is set.	`0.1.0-alpha.4` or earlier
`BlockPlacedListener.onBlockPlaced(WorldView, BlockPos, ResourceId, PlayerView)`	`void`	Called on the server thread after the block was placed, its block entity data applied, and the item used up.	`0.1.0-alpha.4` or earlier

event.entity

Function	Returns	Description	Since
`AllowDamageListener.allowDamage(LivingEntityView, DamageInfo)`	`boolean`	Returns `false` to cancel the damage.	`0.1.0-alpha.4` or earlier
`DamageModifier.modifyDamage(LivingEntityView, DamageInfo)`	`float`	Returns the damage to deal instead of `damage.amount()`; return it unchanged to keep it.	`0.1.0-alpha.4` or earlier
`DeathListener.onDied(LivingEntityView, DamageInfo)`	`void`	Called on the server thread when death starts, before drops.	`0.1.0-alpha.4` or earlier
`EntityJoinedWorldListener.onEntityJoinedWorld(EntityView, WorldView)`	`void`	Called on the server thread while the world starts tracking the entity.	`0.1.0-alpha.4` or earlier

event.interaction

Function	Returns	Description	Since
`AttackEntityListener.onAttackEntity(PlayerView, EntityView)`	`EventResult`	Called on the server thread.	`0.1.0-alpha.4` or earlier
`UseBlockListener.onUseBlock(PlayerView, Hand, ItemStackRef, BlockPos, Direction)`	`InteractionResult`	Called on the server thread.	`0.1.0-alpha.4` or earlier
`UseEntityListener.onUseEntity(PlayerView, Hand, ItemStackRef, EntityView)`	`InteractionResult`	Called on the server thread.	`0.1.0-alpha.4` or earlier
`UseItemListener.onUseItem(PlayerView, Hand, ItemStackRef)`	`InteractionResult`	Called on the server thread, also for an empty hand.	`0.1.0-alpha.4` or earlier

event.lifecycle

Function	Returns	Description	Since
`ModsInitializedListener.onModsInitialized()`	`void`	Handles the event.	`0.1.0-alpha.10`

event.player

Function	Returns	Description	Since
`LoginCheckListener.checkLogin(UUID, String)`	`Optional<String>`	Returns a reason to refuse the player, shown on their disconnect screen, or empty to let them in.	`0.1.0-alpha.4` or earlier
`PlayerCopyListener.onPlayerCopy(PlayerView, PlayerView, boolean)`	`void`	Called on the server thread while the game builds the new player object for a respawn, after the game copied what it keeps (inventory with `keepInventory`, everything when returning from the End) and after Poly Mod Loader copied `EntityDataKey` data.	`0.1.0-alpha.4` or earlier
`PlayerJoinedListener.onPlayerJoined(PlayerView)`	`void`	Called on the server thread; `player` is valid only during the call.	`0.1.0-alpha.4` or earlier
`PlayerLeavingListener.onPlayerLeaving(PlayerView)`	`void`	Called on the server thread before the player is removed; `player` is valid only during the call.	`0.1.0-alpha.4` or earlier
`PlayerRespawnedListener.onPlayerRespawned(PlayerView, boolean)`	`void`	Called on the server thread after the new player object was placed in its world.	`0.1.0-alpha.4` or earlier

event.server

Function	Returns	Description	Since
`ServerStartedListener.onServerStarted(ServerView)`	`void`	Handles the event.	`0.1.0-alpha.4` or earlier
`ServerStartingListener.onServerStarting(ServerView)`	`void`	Handles the event.	`0.1.0-alpha.4` or earlier
`ServerStoppedListener.onServerStopped(ServerView)`	`void`	Handles the event.	`0.1.0-alpha.4` or earlier
`ServerStoppingListener.onServerStopping(ServerView)`	`void`	Handles the event.	`0.1.0-alpha.4` or earlier
`ServerTickListener.onServerTick(ServerView)`	`void`	Handles the event.	`0.1.0-alpha.4` or earlier
`ServerView.dedicated()`	`boolean`	Whether Minecraft reports this server as dedicated.	`0.1.0-alpha.4` or earlier
`ServerView.motd()`	`String`	Message of the day shown in the server list.	`0.1.0-alpha.4` or earlier
`ServerView.playerCount()`	`int`	Players currently connected.	`0.1.0-alpha.4` or earlier
`ServerView.tickCount()`	`int`	Ticks processed so far.	`0.1.0-alpha.4` or earlier

event.world

Function	Returns	Description	Since
`ChunkListener.onChunk(WorldView, int, int)`	`void`	A chunk of `world`; coordinates are chunk coordinates.	`0.1.0-alpha.4` or earlier
`WorldListener.onWorld(WorldView)`	`void`	Called on the server thread; `world` is valid only during the call.	`0.1.0-alpha.4` or earlier
`WorldReadyListener.onWorldReady(WorldView)`	`void`	Called on the server thread at the start of the dimension's first tick.	`0.1.0-alpha.4` or earlier

inventory

Function	Returns	Description	Since
`InventoryView.add(ResourceId, int)`	`int`	Adds items to existing stacks first, then to empty slots.	`0.1.0-alpha.4` or earlier
`InventoryView.clear()`	`void`	Empties every slot.	`0.1.0-alpha.4` or earlier
`InventoryView.count(ResourceId)`	`int`	How many of `item` the inventory holds.	`0.1.0-alpha.4` or earlier
`InventoryView.get(int)`	`ItemStackView`	The stack in `slot`; `IndexOutOfBoundsException` for a bad slot.	`0.1.0-alpha.4` or earlier
`InventoryView.set(int, ResourceId, int)`	`void`	Replaces the stack in `slot`; a count of 0 empties it.	`0.1.0-alpha.4` or earlier
`InventoryView.size()`	`int`	Number of slots.	`0.1.0-alpha.4` or earlier
`InventoryView.stackAt(int)`	`ItemStackRef`	The live stack in `slot`, to read or change its components.	`0.1.0-alpha.4` or earlier
`ItemStackRef.count()`	`int`	How many, 0 when empty.	`0.1.0-alpha.4` or earlier
`ItemStackRef.customName()`	`Optional<String>`	The name given with an anvil or `setCustomName`, if any.	`0.1.0-alpha.4` or earlier
`ItemStackRef.damage()`	`int`	Durability used up, 0 for undamaged or undamageable items.	`0.1.0-alpha.4` or earlier
`ItemStackRef.get(ItemComponentKey<T>)`	`Optional<T>`	The component's value, or empty when the stack does not have it.	`0.1.0-alpha.4` or earlier
`ItemStackRef.isEmpty()`	`boolean`	Whether the stack is empty.	`0.1.0-alpha.4` or earlier
`ItemStackRef.isIn(TagKey)`	`boolean`	Whether the stack's item is in an item tag, for example `#minecraft:logs`; `false` for an empty stack.	`0.1.0-alpha.4` or earlier
`ItemStackRef.item()`	`ResourceId`	The item, `minecraft:air` when empty.	`0.1.0-alpha.4` or earlier
`ItemStackRef.maxDamage()`	`int`	Durability, 0 for undamageable items.	`0.1.0-alpha.4` or earlier
`ItemStackRef.remove(ItemComponentKey<?>)`	`void`	Removes the component.	`0.1.0-alpha.4` or earlier
`ItemStackRef.set(ItemComponentKey<T>, T)`	`void`	Sets the component's value.	`0.1.0-alpha.4` or earlier
`ItemStackRef.setCount(int)`	`void`	Changes the count; 0 empties the stack.	`0.1.0-alpha.4` or earlier
`ItemStackRef.setCustomName(String)`	`void`	Gives the stack a name, or removes it with `null`.	`0.1.0-alpha.4` or earlier
`ItemStackRef.setDamage(int)`	`void`	Sets the used durability, clamped to `[0, maxDamage]`.	`0.1.0-alpha.4` or earlier
`ItemStackRef.snapshot()`	`ItemStackView`	A snapshot of item and count.	`0.1.0-alpha.4` or earlier
`ItemStackView.isEmpty()`	`boolean`	Whether the slot is empty.	`0.1.0-alpha.4` or earlier

lifecycle

Function	Returns	Description	Since
`ClientModInitializer.onInitializeClient(ModContext)`	`void`	Initialises the mod's client-only parts.	`0.1.0-alpha.4` or earlier
`CommonModInitializer.onInitializeCommon(ModContext)`	`void`	Initialises the mod's common (side-independent) parts.	`0.1.0-alpha.4` or earlier
`DedicatedServerModInitializer.onInitializeDedicatedServer(ModContext)`	`void`	Initialises the mod's dedicated-server-only parts.	`0.1.0-alpha.4` or earlier
`LoadedMods.all()`	`List<LoadedMods.Mod>`	Every loaded mod: first those a host loader runs, then the others in the order their entrypoints run.	`0.1.0-alpha.18`
`LoadedMods.find(String)`	`Optional<LoadedMods.Mod>`	The loaded mod with `modId`: the mod whose own ID it is, otherwise the first mod that provides it; empty when none is loaded.	`0.1.0-alpha.18`
`LoadedMods.isLoaded(String)`	`boolean`	Whether a mod with `modId` is loaded, by its own ID or an ID it provides (`provides` in `fabric.mod.json`).	`0.1.0-alpha.18`
`ModContext.client()`	`ClientRegistrar`	Client-only registrations: key bindings and HUD layers.	`0.1.0-alpha.4` or earlier
`ModContext.commands()`	`CommandRegistrar`	Registers this mod's server commands.	`0.1.0-alpha.4` or earlier
`ModContext.configDirectory()`	`Path`	This mod's configuration directory, `config/<mod id>` in the game directory; created on first call.	`0.1.0-alpha.4` or earlier
`ModContext.content()`	`ContentRegistrar`	Declares this mod's blocks and items (common entrypoints only).	`0.1.0-alpha.4` or earlier
`ModContext.events()`	`EventRegistry`	Registers event listeners owned by this mod.	`0.1.0-alpha.4` or earlier
`ModContext.gameTests()`	`GameTestRegistrar`	Registers this mod's in-game tests.	`0.1.0-alpha.4` or earlier
`ModContext.modId()`	`String`	The mod ID declared in `poly.mod.json`, for example `minimal_native_mod`.	`0.1.0-alpha.4` or earlier
`ModContext.modVersion()`	`String`	The mod version declared in `poly.mod.json`.	`0.1.0-alpha.4` or earlier
`ModContext.mods()`	`LoadedMods`	The mods loaded in this game, of every loader (Poly Mods, Fabric mods, Forge mods).	`0.1.0-alpha.18`
`ModContext.network()`	`NetworkRegistrar`	Declares this mod's network channels.	`0.1.0-alpha.4` or earlier
`ModContext.onShutdown(String, Runnable)`	`void`	Registers work to run when the game process exits.	`0.1.0-alpha.4` or earlier
`ModContext.permissions()`	`PermissionRegistrar`	The mod's permissions and permission providers.	`0.1.0-alpha.4` or earlier
`ModContext.resources()`	`ResourceRegistrar`	Reload listeners for the mod's own data and asset files.	`0.1.0-alpha.4` or earlier
`ModContext.side()`	`GameSide`	Whether this process is a client or a dedicated server.	`0.1.0-alpha.4` or earlier
`ModContext.systems()`	`SystemLookup`	The active implementation of each Poly Mod Loader system, after replacements were applied.	`0.1.0-alpha.4` or earlier
`ModContext.worldgen()`	`WorldgenRegistrar`	Attaches this mod's placed features to biomes.	`0.1.0-alpha.4` or earlier

network

Function	Returns	Description	Since
`ClientPayloadHandler.receive(T)`	`void`	Called on the client thread.	`0.1.0-alpha.4` or earlier
`ConfigurationExchange.Answer.answer(T)`	`T`	The reply to the server's `request`.	`0.1.0-alpha.4` or earlier
`ConfigurationExchange.Check.check(UUID, String, Optional<T>)`	`Optional<String>`	Empty to let the player in, or the message shown to them when the connection is refused.	`0.1.0-alpha.4` or earlier
`ConfigurationExchange.Request.request(UUID, String)`	`Optional<T>`	The message for player `playerName`, or empty to skip the exchange for them.	`0.1.0-alpha.4` or earlier
`ConfigurationExchange.clientAnswer(ConfigurationExchange.Answer<T>)`	`ConfigurationExchange<T>`	How the client answers; without it the client does not answer.	`0.1.0-alpha.4` or earlier
`ConfigurationExchange.id()`	`ResourceId`	The exchange's ID, `<mod id>:<path>`.	`0.1.0-alpha.4` or earlier
`ConfigurationExchange.serverCheck(ConfigurationExchange.Check<T>)`	`ConfigurationExchange<T>`	Whether the server lets the player in after the client's answer.	`0.1.0-alpha.4` or earlier
`ConfigurationExchange.serverRequest(ConfigurationExchange.Request<T>)`	`ConfigurationExchange<T>`	What the server sends to each joining player; without it the exchange is skipped.	`0.1.0-alpha.4` or earlier
`ConfigurationExchange.timeoutTicks(int)`	`ConfigurationExchange<T>`	How long the server waits for the answer, in ticks; 100 (5 seconds) by default.	`0.1.0-alpha.4` or earlier
`NetworkRegistrar.channel(String, PayloadCodec<T>)`	`PayloadChannel<T>`	Declares a channel.	`0.1.0-alpha.4` or earlier
`NetworkRegistrar.configurationExchange(String, PayloadCodec<T>)`	`ConfigurationExchange<T>`	Declares configuration exchange `<mod id>:<path>`: a question the server asks each joining client before the player enters the world.	`0.1.0-alpha.4` or earlier
`PayloadChannel.id()`	`ResourceId`	The channel ID.	`0.1.0-alpha.4` or earlier
`PayloadChannel.onClientReceive(ClientPayloadHandler<T>)`	`void`	Sets what the client does with payloads from the server.	`0.1.0-alpha.4` or earlier
`PayloadChannel.onServerReceive(ServerPayloadHandler<T>)`	`void`	Sets what the server does with payloads from clients.	`0.1.0-alpha.4` or earlier
`PayloadChannel.sendToPlayer(PlayerView, T)`	`void`	Sends a payload to one player.	`0.1.0-alpha.4` or earlier
`PayloadChannel.sendToServer(T)`	`void`	Sends a payload to the server.	`0.1.0-alpha.4` or earlier
`PayloadCodec.decode(PayloadReader)`	`T`	Reads a value written by `encode`.	`0.1.0-alpha.4` or earlier
`PayloadCodec.encode(T, PayloadWriter)`	`void`	Writes `value`.	`0.1.0-alpha.4` or earlier
`PayloadCodec.string()`	`PayloadCodec<String>`	A codec for a single UTF-8 string.	`0.1.0-alpha.4` or earlier
`PayloadReader.readBoolean()`	`boolean`	Reads a `boolean`.	`0.1.0-alpha.4` or earlier
`PayloadReader.readBytes()`	`byte[]`	Reads a byte array.	`0.1.0-alpha.4` or earlier
`PayloadReader.readDouble()`	`double`	Reads a `double`.	`0.1.0-alpha.4` or earlier
`PayloadReader.readInt()`	`int`	Reads an `int`.	`0.1.0-alpha.4` or earlier
`PayloadReader.readLong()`	`long`	Reads a `long`.	`0.1.0-alpha.4` or earlier
`PayloadReader.readString()`	`String`	Reads a string.	`0.1.0-alpha.4` or earlier
`PayloadReader.remaining()`	`int`	Bytes not read yet.	`0.1.0-alpha.4` or earlier
`PayloadWriter.writeBoolean(boolean)`	`PayloadWriter`	Writes a `boolean` as one byte.	`0.1.0-alpha.4` or earlier
`PayloadWriter.writeBytes(byte[])`	`PayloadWriter`	Writes a length-prefixed byte array.	`0.1.0-alpha.4` or earlier
`PayloadWriter.writeDouble(double)`	`PayloadWriter`	Writes an 8-byte `double`.	`0.1.0-alpha.4` or earlier
`PayloadWriter.writeInt(int)`	`PayloadWriter`	Writes a 4-byte `int`.	`0.1.0-alpha.4` or earlier
`PayloadWriter.writeLong(long)`	`PayloadWriter`	Writes an 8-byte `long`.	`0.1.0-alpha.4` or earlier
`PayloadWriter.writeString(String)`	`PayloadWriter`	Writes a length-prefixed UTF-8 string (at most 32767 characters).	`0.1.0-alpha.4` or earlier
`ServerPayloadHandler.receive(T, PlayerView)`	`void`	Called on the server thread.	`0.1.0-alpha.4` or earlier

permission

Function	Returns	Description	Since
`PermissionProvider.check(PlayerView, PermissionNode)`	`PermissionResult`	Whether `player` has `node`, or `PermissionResult.UNDECIDED` to let the next provider or the node's default decide.	`0.1.0-alpha.4` or earlier
`PermissionRegistrar.node(String, int)`	`PermissionNode`	Declares `<mod id>.<path>`.	`0.1.0-alpha.4` or earlier
`PermissionRegistrar.provider(PermissionProvider)`	`void`	Adds a provider asked for every permission check of every mod.	`0.1.0-alpha.4` or earlier

resource

Function	Returns	Description	Since
`BinaryReloadListener.onReload(Map<ResourceId,byte[]>)`	`void`	Files by ID (`<namespace>:<path without the suffix>`); the arrays are the listener's own.	`0.1.0-alpha.4` or earlier
`ResourceId.minecraft(String)`	`ResourceId`	An identifier in the `minecraft` namespace.	`0.1.0-alpha.4` or earlier
`ResourceId.of(String, String)`	`ResourceId`	Creates `namespace:path`.	`0.1.0-alpha.4` or earlier
`ResourceId.parse(String)`	`ResourceId`	Parses `namespace:path`; text without a colon is in the `minecraft` namespace, as in the game's commands and data files.	`0.1.0-alpha.4` or earlier
`ResourceRegistrar.onAssetFiles(String, String, BinaryReloadListener)`	`void`	Like `onAssetReload`, for files ending in `suffix`, as bytes.	`0.1.0-alpha.4` or earlier
`ResourceRegistrar.onAssetReload(String, ResourceReloadListener)`	`void`	Reads `assets/<namespace>/<directory>/**.json` from the enabled resource packs when the client starts and on F3+T; the listener runs on the client thread.	`0.1.0-alpha.4` or earlier
`ResourceRegistrar.onDataFiles(String, String, BinaryReloadListener)`	`void`	Like `onDataReload`, for files ending in `suffix` (for example `.png` or `.txt`), handed over as bytes.	`0.1.0-alpha.4` or earlier
`ResourceRegistrar.onDataReload(String, ResourceReloadListener)`	`void`	Reads `data/<namespace>/<directory>/**.json` from all enabled data packs (including mod jars) when the server starts and on `/reload`; the listener runs on the server thread after the game's own data has loaded.	`0.1.0-alpha.4` or earlier
`ResourceReloadListener.onReload(Map<ResourceId,String>)`	`void`	The JSON files found, by ID: `data/<namespace>/<directory>/<path>.json` becomes `<namespace>:<path>`; contents are UTF-8 text.	`0.1.0-alpha.4` or earlier

stability

Function	Returns	Description	Since
`ApiStability.value()`	`StabilityLevel`	The stability level of the annotated element.	`0.1.0-alpha.4` or earlier

system

Function	Returns	Description	Since
`SystemId.parse(String)`	`Optional<SystemId>`	Parses `value`, or returns empty when it is not a valid system ID.	`0.1.0-alpha.4` or earlier
`SystemLookup.get(Class<T>)`	`T`	Returns the active implementation of `contract`.	`0.1.0-alpha.4` or earlier
`SystemProvider.create(SystemContext)`	`T`	Creates the system implementation.	`0.1.0-alpha.4` or earlier

system.brand

Function	Returns	Description	Since
`GameBrandSystem.brand(GameSide)`	`String`	The brand reported by `side`.	`0.1.0-alpha.4` or earlier

tag

Function	Returns	Description	Since
`TagKey.block(ResourceId)`	`TagKey`	A block tag, for example `TagKey.block(ResourceId.minecraft("mineable/pickaxe"))`.	`0.1.0-alpha.4` or earlier
`TagKey.entityType(ResourceId)`	`TagKey`	An entity type tag, for example `TagKey.entityType(ResourceId.minecraft("skeletons"))`.	`0.1.0-alpha.4` or earlier
`TagKey.item(ResourceId)`	`TagKey`	An item tag, for example `TagKey.item(ResourceId.minecraft("logs"))`.	`0.1.0-alpha.4` or earlier
`TagKey.toString()`	`String`	The tag as written in commands and data files, for example `#minecraft:logs`.	`0.1.0-alpha.4` or earlier
`TagRegistry.directory()`	`String`	The folder under `tags/` that holds this registry's tag files, for example `block`.	`0.1.0-alpha.4` or earlier
`TagView.contains(TagKey, ResourceId)`	`boolean`	Whether `entry` (a block, item, or entity type ID, matching the tag's registry) is in the tag, including through nested tags.	`0.1.0-alpha.4` or earlier
`TagView.entries(TagKey)`	`List<ResourceId>`	Every entry of the tag, nested tags resolved, in the game's order; empty for an unknown tag.	`0.1.0-alpha.4` or earlier

world

Function	Returns	Description	Since
`BlockPos.above()`	`BlockPos`	The position one block up.	`0.1.0-alpha.4` or earlier
`BlockPos.below()`	`BlockPos`	The position one block down.	`0.1.0-alpha.4` or earlier
`BlockPos.of(int, int, int)`	`BlockPos`	Creates a position.	`0.1.0-alpha.4` or earlier
`BlockPos.offset(int, int, int)`	`BlockPos`	This position moved by the given amounts.	`0.1.0-alpha.4` or earlier
`Direction.isHorizontal()`	`boolean`	Whether this is one of the four horizontal directions.	`0.1.0-alpha.4` or earlier
`Direction.opposite()`	`Direction`	The direction pointing the other way.	`0.1.0-alpha.4` or earlier
`StorageOptions.syncedToClients()`	`StorageOptions`	These options, synchronised to clients.	`0.1.0-alpha.4` or earlier
`StorageOptions.withVersion(int, DataMigration)`	`StorageOptions`	These options at `version`, upgrading older data with `migration`.	`0.1.0-alpha.4` or earlier
`StoredData.data()`	`DataTree`	The data; call `markChanged()` after changing it so it is saved.	`0.1.0-alpha.4` or earlier
`StoredData.markChanged()`	`void`	Marks the data for saving with the next world save.	`0.1.0-alpha.4` or earlier
`Vector3.length()`	`double`	Length of the vector.	`0.1.0-alpha.4` or earlier
`WorldView.biomeAt(BlockPos)`	`ResourceId`	The biome at `pos`, for example `minecraft:plains`.	`0.1.0-alpha.4` or earlier
`WorldView.blockAt(BlockPos)`	`ResourceId`	The block at `pos`, for example `minecraft:air`.	`0.1.0-alpha.4` or earlier
`WorldView.blockEntityAt(BlockPos)`	`Optional<BlockEntityView>`	The mod block entity at `pos`, if there is one.	`0.1.0-alpha.4` or earlier
`WorldView.dimension()`	`ResourceId`	The dimension, for example `minecraft:overworld`.	`0.1.0-alpha.4` or earlier
`WorldView.emittedLight(BlockPos)`	`int`	Light the block at `pos` emits, 0–15.	`0.1.0-alpha.4` or earlier
`WorldView.entitiesNear(double, double, double, double)`	`List<EntityView>`	Entities whose position is within `radius` blocks of the point.	`0.1.0-alpha.4` or earlier
`WorldView.gameRule(GameRuleKey<T>)`	`T`	The current value of a game rule in this world; server side only.	`0.1.0-alpha.4` or earlier
`WorldView.gameTime()`	`long`	Ticks since the world was created.	`0.1.0-alpha.4` or earlier
`WorldView.isBlockIn(BlockPos, TagKey)`	`boolean`	Whether the block at `pos` is in a block tag, for example `#minecraft:logs`.	`0.1.0-alpha.4` or earlier
`WorldView.isChunkLoaded(int, int)`	`boolean`	Whether the chunk is loaded.	`0.1.0-alpha.4` or earlier
`WorldView.isClientSide()`	`boolean`	Whether this is the client's copy of the world, which must not be changed.	`0.1.0-alpha.4` or earlier
`WorldView.naturalSpawns(BlockPos, MobCategory)`	`List<ResourceId>`	Mobs that can spawn by themselves at `pos` in `category`, by the biome there; for checking natural spawn settings.	`0.1.0-alpha.4` or earlier
`WorldView.otherDimension(ResourceId)`	`Optional<WorldView>`	Another loaded dimension of the same server, such as a mod dimension from data; server side only.	`0.1.0-alpha.4` or earlier
`WorldView.playSound(BlockPos, ResourceId, float, float)`	`void`	Plays a sound to players near `pos` (server) or locally (client).	`0.1.0-alpha.4` or earlier
`WorldView.players()`	`List<PlayerView>`	Players in this dimension.	`0.1.0-alpha.4` or earlier
`WorldView.schedule(int, Runnable)`	`void`	Runs `task` on the server thread after `ticks` ticks of this dimension (0 = next tick).	`0.1.0-alpha.4` or earlier
`WorldView.setBlock(BlockPos, ResourceId)`	`boolean`	Replaces the block at `pos` with the default state of `block` and notifies neighbours and clients.	`0.1.0-alpha.4` or earlier
`WorldView.setChunkForced(int, int, boolean)`	`boolean`	Keeps a chunk loaded (and ticking) until released, like `/forceload`; saved with the world.	`0.1.0-alpha.4` or earlier
`WorldView.setGameRule(GameRuleKey<T>, T)`	`void`	Changes a game rule for this world; server side only.	`0.1.0-alpha.4` or earlier
`WorldView.setProperty(BlockPos, BlockProperty<T>, T)`	`boolean`	Changes one property of the block at `pos`, keeping the others.	`0.1.0-alpha.4` or earlier
`WorldView.spawnEntity(ResourceId, double, double, double)`	`EntityView`	Spawns an entity of `type` (for example `minecraft:pig` or a mod mob) at the position; server side only.	`0.1.0-alpha.4` or earlier
`WorldView.spawnParticles(ResourceId, double, double, double, int, double)`	`void`	Shows a simple particle (one without options, such as `minecraft:heart` or `minecraft:flame`) to nearby players; server side only.	`0.1.0-alpha.4` or earlier
`WorldView.stateAt(BlockPos)`	`BlockStateView`	The block and its property values at `pos`.	`0.1.0-alpha.4` or earlier
`WorldView.storage(ResourceId)`	`StoredData`	Data saved with this dimension under `id` (use your mod ID as namespace), created empty on first use.	`0.1.0-alpha.4` or earlier
`WorldView.storage(ResourceId, StorageOptions)`	`StoredData`	World storage with a data version and optional client synchronisation.	`0.1.0-alpha.4` or earlier
`WorldView.tags()`	`TagView`	The block, item, and entity type tags the game loaded (the server's data, or the client's copy).	`0.1.0-alpha.4` or earlier

worldgen

Function	Returns	Description	Since
`BiomeDefinition.Builder.build()`	`BiomeDefinition`	Creates the definition.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.Builder.climate(float, float, boolean)`	`BiomeDefinition.Builder`	Temperature (plains 0.8), downfall (plains 0.4) and whether it rains or snows.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.Builder.feature(GenerationStepName, ResourceId)`	`BiomeDefinition.Builder`	Adds a placed feature, such as `minecraft:trees_plains`, in `step`.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.Builder.fogColor(int)`	`BiomeDefinition.Builder`	Fog colour, `0xRRGGBB`.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.Builder.foliageColor(int)`	`BiomeDefinition.Builder`	Leaf colour, `0xRRGGBB`, instead of one computed from the climate.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.Builder.grassColor(int)`	`BiomeDefinition.Builder`	Grass colour, `0xRRGGBB`, instead of one computed from the climate.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.Builder.skyColor(int)`	`BiomeDefinition.Builder`	Sky colour, `0xRRGGBB`.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.Builder.spawn(MobCategory, ResourceId, int, int, int)`	`BiomeDefinition.Builder`	Adds a naturally spawning mob.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.Builder.waterColor(int)`	`BiomeDefinition.Builder`	Water colour, `0xRRGGBB`.	`0.1.0-alpha.4` or earlier
`BiomeDefinition.builder()`	`BiomeDefinition.Builder`	A builder with plains-like values and no features or spawns.	`0.1.0-alpha.4` or earlier
`BiomeSelector.ids(ResourceId[])`	`BiomeSelector`	Biomes with one of these IDs.	`0.1.0-alpha.4` or earlier
`BiomeSelector.tag(ResourceId)`	`BiomeSelector`	Biomes in this tag.	`0.1.0-alpha.4` or earlier
`CodeFeature.place(FeatureContext)`	`boolean`	Places the feature around `FeatureContext.origin()`.	`0.1.0-alpha.4` or earlier
`ColumnBuilder.fill(int, int, ResourceId)`	`void`	Sets `block` from `fromY` to `toY`, both inclusive.	`0.1.0-alpha.4` or earlier
`ColumnBuilder.maxY()`	`int`	Highest Y of the dimension (inclusive).	`0.1.0-alpha.4` or earlier
`ColumnBuilder.minY()`	`int`	Lowest Y of the dimension.	`0.1.0-alpha.4` or earlier
`ColumnBuilder.seed()`	`long`	A number derived from the world seed and the generator ID, the same for every column.	`0.1.0-alpha.4` or earlier
`ColumnBuilder.set(int, ResourceId)`	`void`	Sets the default state of `block` at `y`; positions outside the dimension are ignored.	`0.1.0-alpha.4` or earlier
`FeatureContext.blockAt(BlockPos)`	`ResourceId`	The block at `pos`, without properties.	`0.1.0-alpha.4` or earlier
`FeatureContext.isAir(BlockPos)`	`boolean`	Whether `pos` is air.	`0.1.0-alpha.4` or earlier
`FeatureContext.maxY()`	`int`	The highest block y of the world.	`0.1.0-alpha.4` or earlier
`FeatureContext.minY()`	`int`	The lowest block y of the world.	`0.1.0-alpha.4` or earlier
`FeatureContext.origin()`	`BlockPos`	The position the placement chose, for example on the surface or at a random height.	`0.1.0-alpha.4` or earlier
`FeatureContext.random()`	`RandomGenerator`	Randomness for this placement; the same world seed and position give the same values.	`0.1.0-alpha.4` or earlier
`FeatureContext.setBlock(BlockPos, ResourceId)`	`void`	Sets the default state of `block` at `pos`.	`0.1.0-alpha.4` or earlier
`FeatureContext.surfaceY(int, int)`	`int`	The y of the first air block above the terrain at `x, z`, as generation sees it so far.	`0.1.0-alpha.4` or earlier
`FeaturePlacement.atHeight(int, int, int)`	`FeaturePlacement`	`countPerChunk` tries at random heights from `minY` to `maxY` in each chunk.	`0.1.0-alpha.4` or earlier
`FeaturePlacement.onSurface(int)`	`FeaturePlacement`	`countPerChunk` tries on the surface of each chunk.	`0.1.0-alpha.4` or earlier
`FeaturePlacement.rarity(int)`	`FeaturePlacement`	This placement in only 1 of `rarity` chunks.	`0.1.0-alpha.4` or earlier
`NoiseFunction.compute(int, int, int)`	`double`	The density at block `x, y, z`.	`0.1.0-alpha.4` or earlier
`StructureBuilder.build(StructurePieceContext)`	`void`	Writes the structure's blocks through `context`.	`0.1.0-alpha.4` or earlier
`StructureDefinition.Builder.adaptTerrain()`	`StructureDefinition.Builder`	Smooths the terrain around the box, like around a village.	`0.1.0-alpha.4` or earlier
`StructureDefinition.Builder.biomes(BiomeSelector)`	`StructureDefinition.Builder`	Where it may generate; every overworld biome (`#minecraft:is_overworld`) by default.	`0.1.0-alpha.4` or earlier
`StructureDefinition.Builder.build()`	`StructureDefinition`	Creates the definition; invalid values throw `IllegalArgumentException`.	`0.1.0-alpha.4` or earlier
`StructureDefinition.Builder.spacing(int, int)`	`StructureDefinition.Builder`	Average and minimum distance between structures in chunks; 32 and 8 by default.	`0.1.0-alpha.4` or earlier
`StructureDefinition.Builder.step(GenerationStepName)`	`StructureDefinition.Builder`	The generation step; `GenerationStepName.SURFACE_STRUCTURES` by default.	`0.1.0-alpha.4` or earlier
`StructureDefinition.Builder.yOffset(int)`	`StructureDefinition.Builder`	Raises (or with a negative value sinks) the box relative to the surface; 0 by default.	`0.1.0-alpha.4` or earlier
`StructureDefinition.builder(int, int, int, StructureBuilder)`	`StructureDefinition.Builder`	A builder for a `sizeX × sizeY × sizeZ` structure built by `builder`.	`0.1.0-alpha.4` or earlier
`StructurePieceContext.blockAt(int, int, int)`	`ResourceId`	The block at a box position, without properties.	`0.1.0-alpha.4` or earlier
`StructurePieceContext.fill(int, int, int, int, int, int, ResourceId)`	`void`	Fills the box positions from `(x1, y1, z1)` to `(x2, y2, z2)`, both included.	`0.1.0-alpha.4` or earlier
`StructurePieceContext.origin()`	`BlockPos`	World position of the box's lowest corner.	`0.1.0-alpha.4` or earlier
`StructurePieceContext.random()`	`RandomGenerator`	Randomness for this structure; the same on every call for the same structure.	`0.1.0-alpha.4` or earlier
`StructurePieceContext.setBlock(int, int, int, ResourceId)`	`void`	Sets the default state of `block` at a box position.	`0.1.0-alpha.4` or earlier
`StructurePieceContext.sizeX()`	`int`	Box size along x.	`0.1.0-alpha.4` or earlier
`StructurePieceContext.sizeY()`	`int`	Box size along y.	`0.1.0-alpha.4` or earlier
`StructurePieceContext.sizeZ()`	`int`	Box size along z.	`0.1.0-alpha.4` or earlier
`TerrainGenerator.fillColumn(int, int, ColumnBuilder)`	`void`	Fills the column at world position `x, z`; unset blocks stay air.	`0.1.0-alpha.4` or earlier
`TerrainGenerator.seaLevel()`	`int`	Sea level of dimensions using this generator; the game spawns water mobs and fish below it.	`0.1.0-alpha.4` or earlier
`WorldgenRegistrar.addFeature(BiomeSelector, GenerationStepName, ResourceId)`	`void`	Adds a placed feature at the end of `step` in every selected biome.	`0.1.0-alpha.4` or earlier
`WorldgenRegistrar.biome(String, BiomeDefinition)`	`ResourceId`	Defines biome `<mod id>:<path>` in code.	`0.1.0-alpha.4` or earlier
`WorldgenRegistrar.chunkGenerator(String, TerrainGenerator)`	`ResourceId`	Registers terrain written in code as generator type `<mod id>:<path>`, for dimensions in data packs.	`0.1.0-alpha.4` or earlier
`WorldgenRegistrar.densityFunction(String, double, double, NoiseFunction)`	`ResourceId`	Registers a density function written in code as type `<mod id>:<path>`.	`0.1.0-alpha.4` or earlier
`WorldgenRegistrar.feature(String, FeaturePlacement, CodeFeature)`	`ResourceId`	Registers a feature written in code as feature type `<mod id>:<path>`, and writes a configured and a placed feature with the same ID into Poly Mod Loader's generated data pack.	`0.1.0-alpha.4` or earlier
`WorldgenRegistrar.structure(String, StructureDefinition)`	`ResourceId`	Registers a structure built in code as `<mod id>:<path>`, with its structure set, in Poly Mod Loader's generated data pack.	`0.1.0-alpha.4` or earlier

client​

command​

content​

content.block​

content.block.entity​

content.block.state​

content.effect​

content.entity​

content.entity.model​

content.item​

content.particle​

data​

devtools.gametest​

entity​

event​

event.block​

event.entity​

event.interaction​

event.lifecycle​

event.player​

event.server​

event.world​

inventory​

lifecycle​

network​

permission​

resource​

stability​

system​

system.brand​

tag​

world​

worldgen​