Module fortress 

Nether fortress. Vanilla’s NetherFortressPieces: start with a BridgeCrossing, then weighted BFS over bridge/castle pools honoring place-count, prev-piece, and collision constraints. Structure is vertically offset into Y ∈ [48, 70].

Structs

Builder 🔒

FortressPiece

Output piece record.

NetherFortressStructure

Registered under "minecraft:fortress". Shares the nether_complexes set with bastion_remnant (jigsaw), so it’s dispatched from the jigsaw arm’s fallthrough.

ParentRef 🔒

Parent context threaded through generate_child_*.

PieceWeight 🔒

Enums

FortressPieceData

Vanilla nether-fortress piece payload persisted for feature-stage placement.

FortressPieceKind 🔒

Constants

DIST_LIMIT 🔒

HORIZONTAL_ORDER 🔒

Vanilla Direction.Plane.HORIZONTAL order: N, E, S, W.

LOWEST_Y 🔒

MAGIC_START_Y 🔒

MAX_DEPTH 🔒

START_X_OFFSET 🔒

START_Z_OFFSET 🔒

Y_HIGH_ALLOWED 🔒

Y_LOW_ALLOWED 🔒

Functions

add_children 🔒

bridge_weights 🔒

castle_weights 🔒

create_piece 🔒

Mirrors vanilla’s findAndCreateBridgePieceFactory + PIECE.createPiece.

find_collision 🔒

generate_and_add_piece 🔒

Out-of-range branch builds a BridgeEndFiller (consuming RNG for selfSeed) then discards it. We mirror vanilla: call create_piece for RNG sync, don’t add.

generate_child_forward 🔒

generate_child_left 🔒

generate_child_right 🔒

generate_fortress_pieces

All fortress pieces for the chunk, vertically offset into Y ∈ [48, 70].

generate_piece_weighted 🔒

Vanilla’s generatePiece. Falls back to BridgeEndFiller if no weighted pick succeeds within 5 attempts. On ineligible picks vanilla falls through to subsequent pieces in the list.

is_ok_box 🔒

make_bounding_box 🔒

Matches StructurePiece.makeBoundingBox: width rotates with the direction axis.

move_inside_heights 🔒

orient_box 🔒

Matches BoundingBox.orientBox.

overall_bb 🔒