Blob 47 Godot

Class: PentaTileLayoutBlob47Godot

Blob 47 Godot is a single-grid layout using an 8-bit Moore-neighborhood mask. PentaTile collapses the 256 raw masks to 47 reachable blob states using the standard rule: a corner bit matters only when both adjacent edge bits are set.

The bundled fallback atlas is packed into a 7x7 grid with two unused cells.

Template

Atlas contract

Property	Value
Grid	7 columns x 7 rows
Tile count	47 used cells plus 2 unused cells
Mask bits	N=1, E=2, S=4, W=8, NE=16, SE=32, SW=64, NW=128
Dispatch	raw 8-bit mask collapses to one of 47 masks, then row-major lookup
Grid type	single-grid
Rotation reuse	none

Setup

1. Add PentaTileMapLayer.
2. Set layout to PentaTileLayoutBlob47Godot.
3. Use a 7x7 atlas that matches the bundled template packing.
4. Leave the two unused cells transparent or unused.

Collapse rule

The raw 8-bit mask is reduced before lookup: a diagonal corner bit only matters when both adjacent cardinal edge bits are present. For example, NE only survives if both N and E are also set.

Authoring notes

• This is the most detailed shipped single-grid layout. Use it when your art already exists as a 47-blob set.
• Empty-looking isolated cells still render through mask 0; do not treat mask=0 as erase in custom variants.
• The bundled order follows the 47 reachable masks sorted ascending and packed row-major.