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Finished versions one and two of the format specifications

Kayne Ruse
2013-06-28 21:38:51 +10:00
parent 8efa962d04
commit 7d291de916
1 changed files with 28 additions and 60 deletions
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Map-File-Format.md
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I'm overthinking this too much. This is why I like coding more than documentation. Check back after the editor is finished.
## Version One (Under Construction)
## Version One
This version is designed to be as simple as possible, while still providing a solid feature set.
Tiles are zero indexed, with -1 meaning transparent.
All tiles share the same tileset, which is loaded separately and not referenced in the map file.
This version is stored in plain text format.
#### Modules
MapUtility
-
#### File Format
#### File Format Specification
The map files are layed out like this:
@@ -22,12 +14,12 @@ The map files are layed out like this:
[data blob]
```
The metadata is a single line of non-negative, comma delimited integers ending in a semicolon.
The metadata is a single line of non-negative, space delimited integers.
The metadata contains:
* layers
* width of the map (in tiles)
* height of the map (in tiles)
* the number of layers
The data blob contains the actual tile data. These are plain text integers delimited by whitespace.
The data is read in this order:
@@ -38,65 +30,41 @@ The data is read in this order:
-------------------------
## Version Two (Under Construction)
## Version Two
The map data is stored in plain text.
The tiles are zero indexed, with -1 meaning transparent.
Each layer has it's own tileset.
#### Containers
Patch:
int xCount, yCount
vector<vector<int>> data[xCount][yCount]
Layer:
int xCount, yCount
vector<vector<Patch>> data[xCount][yCount]
MapUtility:
int layerCount
list<Layer> data[layerCount]
list<Image> tilesets[layerCount]
This version is designed to be as robust as possible, while still being easy to understand.
Tiles are zero indexed, with -1 meaning transparent.
Each layer has its own tileset, with the file name stored in the map file.
This version is stored mostly in binary format.
#### File Format
The files are layed out like this:
```
[format metadata]
[tileset list]
[data blob]
[metadata]
[tilesets]
[data blob]
```
The format metadata includes the tile size, the number of tiles in a patch, etc. as detailed below. It also includes totals, which can be used to verify the formats before loading the data blob.
The metadata is layed out like this:
The metadata is a single line of non-negative integers.
The metadata contains:
```
tileWidth tileHeight //the width and height of each tile in pixels
patchWidth patchHeight //the width and height of each patch in tiles
patchXCount patchYCount //the number of patches in
layerCount //
totalXCount //
totalYCount //
totalCount //
```
* Tile width
* Tile height
* width of the map (in tiles)
* height of the map (in tiles)
* the number of layers
The tilesets are a list of filenames terminated by semicolons.
The tilesets are a list of plain text filenames terminated by semicolons.
The data blob is made up of each tile, layed out from the bottom layer to the top, from the top-left most tile, read X first.
The data blob contains the actual tile data. These are binary integers.
The data is read in this order:
That is to say, in a map with 2 layers, 3 tiles along the X axis and 4 along the y, this is what the data blob would look like:
* bottom layer
* left most column of the layer
* top most tile of a column
```
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
```
## Version Three
Version three is identical to version two, except that the tilesets are stored in the map file instead of their names. This however, is not yet a priority.