# B27 - Unnamed building

![Unnamed building](img/B27_x5.png)

`OVERWORLD` tileset, **8 x 4 cells** (16 x 8 tiles of 8px, 128 x 64 px). Appears **1 time** in the game. Tile ids index `assets/generated/tilesets/overworld.png`, 16 per row.

Coordinates are 1-based and local to the building: cell x=1..8, y=1..4; tile column c=1..16, tile row r=1..8. No terrain padding is included - edge rows and columns that were pure ground have been trimmed.

## Symbol grid

```
          x1   x2   x3   x4   x5   x6   x7   x8 
      +-----+-----+-----+-----+-----+-----+-----+-----+
   y1 | A B | B B | B B | B B | B B | B B | B B | B C |
      | D E | E E | E E | E E | E E | E E | E E | E D |
      +-----+-----+-----+-----+-----+-----+-----+-----+
   y2 | D E | E E | E E | E E | E E | E E | E E | E D |
      | F G | G G | G G | G G | G G | G G | G G | G H |
      +-----+-----+-----+-----+-----+-----+-----+-----+
   y3 | I J | J J | J J | J J | J J | J J | J J | J K |
      | I L | L L | L L | L L | L L | L L | L L | L K |
      +-----+-----+-----+-----+-----+-----+-----+-----+
   y4 | I L | L L | L L | L L | L L | L L | L L | L K |
      | M N | N N | N N | N N | N N | N N | N N | N O |
      +-----+-----+-----+-----+-----+-----+-----+-----+
```

## Same grid, raw tile ids

```
            x1       x2       x3       x4       x5       x6       x7       x8   
      +---------+---------+---------+---------+---------+---------+---------+---------+
   y1 |  76  83 |  83  83 |  83  83 |  83  83 |  83  83 |  83  83 |  83  83 |  83  77 |
      |  90  18 |  18  18 |  18  18 |  18  18 |  18  18 |  18  18 |  18  18 |  18  90 |
      +---------+---------+---------+---------+---------+---------+---------+---------+
   y2 |  90  18 |  18  18 |  18  18 |  18  18 |  18  18 |  18  18 |  18  18 |  18  90 |
      |  92  23 |  23  23 |  23  23 |  23  23 |  23  23 |  23  23 |  23  23 |  23  93 |
      +---------+---------+---------+---------+---------+---------+---------+---------+
   y3 |  15  10 |  10  10 |  10  10 |  10  10 |  10  10 |  10  10 |  10  10 |  10  31 |
      |  15  75 |  75  75 |  75  75 |  75  75 |  75  75 |  75  75 |  75  75 |  75  31 |
      +---------+---------+---------+---------+---------+---------+---------+---------+
   y4 |  15  75 |  75  75 |  75  75 |  75  75 |  75  75 |  75  75 |  75  75 |  75  31 |
      |  78  26 |  26  26 |  26  26 |  26  26 |  26  26 |  26  26 |  26  26 |  26  79 |
      +---------+---------+---------+---------+---------+---------+---------+---------+
```

As a 1-based Lua array, `rows[r][c]`:

```lua
local rows = {
  {  76,  83,  83,  83,  83,  83,  83,  83,  83,  83,  83,  83,  83,  83,  83,  77 },  -- r1
  {  90,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  90 },  -- r2
  {  90,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  18,  90 },  -- r3
  {  92,  23,  23,  23,  23,  23,  23,  23,  23,  23,  23,  23,  23,  23,  23,  93 },  -- r4
  {  15,  10,  10,  10,  10,  10,  10,  10,  10,  10,  10,  10,  10,  10,  10,  31 },  -- r5
  {  15,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  31 },  -- r6
  {  15,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  75,  31 },  -- r7
  {  78,  26,  26,  26,  26,  26,  26,  26,  26,  26,  26,  26,  26,  26,  26,  79 },  -- r8
}
```

## Legend

_Legend pending._

- `A` = tile 76, used 1x
- `B` = tile 83, used 14x
- `C` = tile 77, used 1x
- `D` = tile 90, used 4x
- `E` = tile 18, used 28x
- `F` = tile 92, used 1x
- `G` = tile 23, used 14x
- `H` = tile 93, used 1x
- `I` = tile 15, used 3x
- `J` = tile 10, used 14x
- `K` = tile 31, used 3x
- `L` = tile 75, used 28x
- `M` = tile 78, used 1x
- `N` = tile 26, used 14x
- `O` = tile 79, used 1x

![distinct tiles](img/B27_atlas.png)

## Collision

Cell walkability reads the **bottom-left 8px tile** of each cell (`src/world/Map.lua:6`):

```
    y1   SOLID  SOLID  SOLID  SOLID  SOLID  SOLID  SOLID  SOLID
    y2   SOLID  SOLID  SOLID  SOLID  SOLID  SOLID  SOLID  SOLID
    y3   SOLID  SOLID  SOLID  SOLID  SOLID  SOLID  SOLID  SOLID
    y4   SOLID  SOLID  SOLID  SOLID  SOLID  SOLID  SOLID  SOLID
```

Every cell is solid - this building has no door of its own.

## Silhouette

258 of the 8192 px inside the box are ground outside the black outline, so the 128x64 box is **not** a solid rectangle - a pixel-perfect cutout has to follow the outline. Terrain pixels by tile row:

```
    r1   c1:25px, c16:25px
    r2   c1:24px, c16:24px
    r3   c1:24px, c16:24px
    r4   c1:24px, c16:24px
    r5   c1:8px, c16:8px
    r6   c1:8px, c16:8px
    r7   c1:8px, c16:8px
    r8   c1:8px, c16:8px
```

## Where it stands

| map | cell (x,y) | door | leads to |
| --- | --- | --- | --- |
| ROUTE_11 | (50,6) | - | scenery, no entrance |