Wang 2-Edge

Class: PentaTileLayoutWang2Edge

Wang 2-Edge is a single-grid 4x4 atlas using a cardinal-edge mask: N=1, E=2, S=4, W=8.

Unlike dual-grid layouts, it paints directly on logic-painted cells. mask=0 still renders a tile, which is important for isolated single-grid cells.

Template

Atlas contract

Property	Value
Grid	4 columns x 4 rows
Tile count	16
Mask bits	N=1, E=2, S=4, W=8
Dispatch	atlas_coords = Vector2i(mask % 4, mask / 4)
Grid type	single-grid
Rotation reuse	none

Setup

1. Add PentaTileMapLayer.
2. Set layout to PentaTileLayoutWang2Edge.
3. Use a 4x4 atlas ordered by mask value.
4. Paint logic cells directly; every painted cell renders one full tile.

Authoring notes

• Make every tile a complete 32x32-style cell, not a partial dual-grid quadrant. Single-grid layouts do not rely on neighboring display cells to complete the visible tile.
• mask=0 is the isolated-cell state, not erase.
• This layout is a good fit for roads, paths, pipes, fences, and edge-driven terrain details.