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# mikunyan
Library to deserialize Unity AssetBundle files (\*.unity3d) and asset files.
A library to deserialize AssetBundle files (\*.unity3d) and asset files of Unity.
The name "Mikunyan" is derived from [Miku Maekawa](http://www.project-imas.com/wiki/Miku_Maekawa).
Ruby-Doc: http://www.rubydoc.info/gems/mikunyan/
## Installation
@@ -33,67 +37,67 @@ If you want to install development build:
```ruby
require 'mikunyan'
# load AssetBundle
# load an AssetBundle file
bundle = Mikunyan::AssetBundle.file(filename)
# you can load AssetBundle from blob
# you can also load a bundle from blob
# bundle = Mikunyan::AssetBundle.load(blob)
# select asset (normaly only one asset)
# select asset (a bundle normally contains only one asset)
asset = bundle.assets[0]
# or you can directly load asset
# or you can directly load an asset from an asset file
# asset = Mikunyan::Asset.file(filename)
# object list
# get a list of objects
list = asset.objects
# object PathIds
# get PathIds of objects
path_ids = asset.path_ids
# object container table (if available)
# get an container table of objects (if available)
containers = asset.containers
# load object (Mikunyan::ObjectValue)
# load an object (Mikunyan::ObjectValue)
obj = asset.parse_object(path_ids[0])
# simplified structure (based on Hash)
# load an object to Ruby data structures
obj_hash = asset.parse_object_simple(path_ids[0])
# hash can be easily serialized to json
# a Hash can be serialized to JSON
require 'json'
obj_hash.to_json
```
### Mikunyan::ObjectValue
`Mikunyan::ObjectValue` can be 3 types. Value, array and map.
`Mikunyan::ObjectValue` can be 3 types: value, array and key-value table.
```ruby
# You can get whether obj is value or not
# get whether obj is value or not
obj.value?
# get value
# get a value
obj.value
# same as obj.value
obj[]
# You can get whether obj is array or not
# get whether obj is array or not
obj.array?
# get array
# get an array
obj.value
# you can directly access by index
obj[0]
# If obj is map, you can get keys
# get keys (if obj is key-value table)
obj.keys
# get child object
# get child objects
obj[key]
# same as obj[key]
@@ -102,9 +106,9 @@ obj.key
### Unpack Texture2D
You can get png file directly from Texture2D asset. Output object's class is `ChunkyPNG::Image`.
You can get image data directly from Texture2D object. Output object's class is `ChunkyPNG::Image`.
Some basic texture formats (1–5, 7, 9, 13–20, 22, 62, and 63), ETC_RGB4 (34), ETC2 (45, 47), and ASTC (48–59) are available.
Some basic texture formats (1–5, 7, 9, 13–20, 22, 62, and 63), DXT1 (10), ETC_RGB4 (34), ETC2 (45, 47), and ASTC (48–59) are available.
```ruby
require 'mikunyan/decoders'
@@ -112,7 +116,7 @@ require 'mikunyan/decoders'
# get some Texture2D asset
obj = asset.parse_object(path_ids[1])
# you can get Image object
# you can get image data
img = Mikunyan::ImageDecoder.decode_object(obj)
# save it!
@@ -123,14 +127,14 @@ Mikunyan cannot decode ASTC with HDR data. Use `Mikunyan::ImageDecoder.create_as
### Json / YAML Outputter
`mikunyan-json` is an executable command for converting unity3d to json.
`mikunyan-json` is an executable command for converting unity3d to JSON.
$ mikunyan-json bundle.unity3d > bundle.json
Available options:
- `--as-asset` (`-a`): interpret input file as not AssetBudnle but Asset
- `--pretty` (`-p`): prettify output json
- `--as-asset` (`-a`): interpret input file as not AssetBundle but Asset
- `--pretty` (`-p`): prettify output JSON
- `--yaml` (`-y`): YAML mode
### Image Outputter
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$ mikunyan-image bundle.unity3d
The console log is json data of output textures as below.
The console log is JSON data of output textures as follows.
```json
[
@@ -158,7 +162,7 @@ The console log is json data of output textures as below.
]
```
If the option `--sprite` specified, `mikunyan-image` will output sprites. The log json also contains sprite information.
If the option `--sprite` specified, `mikunyan-image` will output sprites. The logged JSON also contains sprite information.
```json
[
@@ -215,10 +219,10 @@ If the option `--sprite` specified, `mikunyan-image` will output sprites. The lo
Available options:
- `--as-asset` (`-a`): interpret input file as not AssetBudnle but Asset
- `--outputdir` (`-o`): output directory (default is a basename of input file without an extention)
- `--as-asset` (`-a`): interpret input file as not AssetBundle but Asset
- `--outputdir` (`-o`): specify an output directory (default is a basename of input file without an extension)
- `--sprite` (`-s`): output sprites instead of textures
- `--pretty` (`-p`): prettify output json
- `--pretty` (`-p`): prettify output JSON
## Dependencies
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Mikunyan uses [oily_png](https://rubygems.org/gems/oily_png) instead of chunky_png if available.
## FAQ
## Implementation in other languages
### Sometimes unpacking fails
I'm sorry...
### Can I unpack Mesh files?
It's hard work for me...
### What mikunyan comes from?
[Miku Maekawa](http://www.project-imas.com/wiki/Miku_Maekawa).
- TypeScript: [shibunyan](https://github.com/AnemoneStar/shibunyan)
## Contributing