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extend the description of the 'unused layer' of .DUN #4

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extend the description of the 'unused layer' of .DUN #4

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e99f42f
extend the description of the 'unused layer' of .DUN
pionere Oct 9, 2021
36f3f6d
update main links in the header of DUN.md
pionere Oct 30, 2022
91b0269
update description of DUN files
pionere Mar 11, 2023
b3dbe7e
update description of DUN files II.
pionere Mar 11, 2023
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30 changes: 15 additions & 15 deletions PC-Mac/DUN.md
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@
[4.2 `{ITEMS LAYER}`](#42-items-layer)
[4.3 `{MONSTERS LAYER}`](#43-monsters-layer)
[4.4 `{OBJECTS LAYER}`](#44-objects-layer)
[4.5 `{UNUSED LAYER}`](#45-unused-layer)
[4.5 `{ROOMS LAYER}`](#45-rooms-layer)
[5. Executable Hardcoded DUN Level Maps](#5-executable-hardcoded-dun-level-maps)
[6. Credits](#6-credits)

Expand Down Expand Up @@ -47,9 +47,11 @@ Level maps data longer than one byte (WORDs and DWORDs) is stored using little-e
[{ITEMS LAYER}
{MONSTERS LAYER}
{OBJECTS LAYER}
{UNUSED LAYER}]
{ROOMS LAYER}]
```

Each INDEX is one WORD long (2 bytes).


### 4.1 `{BASE LAYER}`

Expand All @@ -66,23 +68,24 @@ The real tile index (in `lX.til`) is obtained with the following formula:
{TILE INDEX} = {INCREMENTED TILE INDEX} - 1
```

When `{INCREMENTED TILE INDEX}` is equal to 0 the default floor tile is used.
When `{INCREMENTED TILE INDEX}` is equal to 0 the default floor tile is used and might be changed if it is not a complete map.


### 4.2 `{ITEMS LAYER}`

```
{ITEMS TABLE INDEX} * {MAP WIDTH} * {MAP HEIGHT} * 4
{ITEMS TABLE INDEX} * {MAP WIDTH * 2} * {MAP HEIGHT * 2}
```

This layer defines which items lie on the level ground.
This layer is a sub-tile layer, which is 4 times the size of the tile layer `{BASE LAYER}`.
The content of this part is not used by the game.


### 4.3 `{MONSTERS LAYER}`

```
{MONSTERS TABLE INDEX} * {MAP WIDTH} * {MAP HEIGHT} * 4
{MONSTERS TABLE INDEX} * {MAP WIDTH * 2} * {MAP HEIGHT * 2}
```

This layer defines which monsters stand in the level.
Expand All @@ -92,27 +95,24 @@ This layer is a sub-tile layer, which is 4 times the size of the tile layer `{BA
### 4.4 `{OBJECTS LAYER}`

```
{OBJECTS INDEX} * {MAP WIDTH} * {MAP HEIGHT} * 4
{OBJECTS INDEX} * {MAP WIDTH * 2} * {MAP HEIGHT * 2}
```

This layer defines which objects (chests, stands, etc.) are positioned in the level.
This layer is a sub-tile layer, which is 4 times the size of the tile layer `{BASE LAYER}`.


### 4.5 `{UNUSED LAYER}`
### 4.5 `{ROOMS LAYER}`

```
{WORD} * {MAP WIDTH} * {MAP HEIGHT} * 4
{ROOMS INDEX} * {MAP WIDTH * 2} * {MAP HEIGHT * 2}
```

This layer defines the room index of the given sub-tile.
This layer is a sub-tile layer, which is 4 times the size of the tile layer `{BASE LAYER}`.
The use of this layer is unknown, only the following DUN level map files use it, with `{WORD}` values of `0` or `1` defining
something looking like the base level layer shape:

```
DIABDAT.MPQ:/levels/l1data/vile1.dun
DIABDAT.MPQ:/levels/l1data/vile2.dun
```
The values are only used in case of complete set-levels.
In caves every non-external subtile is initialized with room-index of 1.
The rooms of "Chamber of Bone" are hardcoded in the game.


## 5. Executable Hardcoded DUN Level Maps
Expand Down