# DNAViewer
The [`dna_viewer`](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/dna_viewer) contains all the needed classes for reading and creating a functional rig in Maya from the DNA file.
It is organized in a way that allows every option to be configurable, so you can easily get the exact result you want.

## Examples
- [Generates rig and export FBX per LOD](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/examples/dna_viewer_demo.py)
- [Propagate changes from Maya scene to dna](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/examples/dna_viewer_grab_changes_from_scene_and_propagate_to_dna.py)
- [Simple UI](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/examples/dna_viewer_run_in_maya.py)


## Usage from code
There are two [APIs](dna_viewer_api_md):
  - [assemble](dna_viewer_api_rig_assembly_md)
  - [mesh](dna_viewer_api_mesh_utilities_md)

The usage of these can be found in the [dna_viewer_demo.py](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/examples/dna_viewer_demo.py).

## Usage in Maya 
Usage in Maya is explained [here](dna_viewer_maya_md)


## Folder structure

- [builder](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/dna_viewer/builder) - Contains the builder classes, which are used for easily adding configuration options
and building the scene, character, meshes, etc.
- [config](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/dna_viewer/config) - Contains classes that represent configuration options. These files are used for fine-tuning the options.
- [const](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/dna_viewer/const) - Contains constants files used in the project.
- [model](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/dna_viewer/model) - Contains the data classes used in the project.
- [reader](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/dna_viewer/reader) - Contains the classes that are used for reading the contents of the DNA file.
- [ui](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/dna_viewer/ui) - Contains the classes needed for the Maya UI.
- [util](https://github.com/EpicGames/MetaHuman-DNA-Calibration/tree/main/dna_viewer/util) - Mostly contains the classes that are wrapper classes around Maya method calls.

## How it works

The general flow is the following:

![image](img/flow_general.png)

The flow of the scene building process is the following:

![image](img/flow_scene_build.png)

The flow of the rig building process is the following:

![image](img/flow_character_build.png)

Legend:
- <span style="color:blue">blue: builder-related</span>.
- <span style="color:green">green: config-related</span>.
- <span style="color:brown">brown: model-related</span>.
- <span style="color:purple">purple: reader-related</span>.