rpack/README.md

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# rpack [![Build Status](https://github.com/Leinnan/rpack/workflows/CI/badge.svg)](https://github.com/Leinnan/rpack/actions?workflow=CI)
Create tilemaps in seconds!
This repository contains few projects that together make a fully functional solution for generating tilemaps alongside integration to the Bevy game engine.
## Bevy rPack
[![Crates.io](https://img.shields.io/crates/v/bevy_rpack)](https://crates.io/crates/bevy_rpack)
[![Documentation](https://docs.rs/bevy_rpack/badge.svg)](https://docs.rs/bevy_rpack)
A Bevy plugin with support for the `rpack.json` atlases.
More info available at [crates/bevy_rpack](https://github.com/Leinnan/rpack/tree/master/crates/bevy_rpack).
Repository contains example how to use plugin in Bevy.
## rPack CLI
[![Crates.io](https://img.shields.io/crates/v/rpack_cli)](https://crates.io/crates/rpack_cli)
[![Documentation](https://docs.rs/rpack_cli/badge.svg)](https://docs.rs/rpack_cli)
Command line interface for generating tilemaps.
```sh
Build rpack tilemaps with ease
Usage: rpack_cli <COMMAND>
Commands:
generate Generates a tilemap
config-create Creates a tilemap generation config
generate-from-config Generates a tilemap from config
help Print this message or the help of the given subcommand(s)
Options:
-h, --help
Print help (see a summary with '-h')
-V, --version
Print version
```
Available at [crates/rpack_cli](https://github.com/Leinnan/rpack/tree/master/crates/rpack_cli).
### Installation
Only with Cargo (Rust package manager) at the moment:
```sh
cargo install rpack_cli
```
## rPack egui
[![Crates.io](https://img.shields.io/crates/v/rpack_egui)](https://crates.io/crates/rpack_egui)
A both desktop and web frontend for generating tilemaps. Just drag and drop images into the program and generate tilemaps.
To open it in browser click one of the icons below:
[![Itch.io](https://img.shields.io/badge/Itch-%23FF0B34.svg?style=for-the-badge&logo=Itch.io&logoColor=white)](https://mevlyshkin.itch.io/rpack)
[![Github Pages](https://img.shields.io/badge/github%20pages-121013?style=for-the-badge&logo=github&logoColor=white)](http://rpack.mevlyshkin.com/)
![rpack_ebVVrMf3wm](https://github.com/user-attachments/assets/bb015348-3c1f-46be-9312-963b4f39f9c0)
Available at [crates/rpack_egui](https://github.com/Leinnan/rpack/tree/master/crates/rpack_egui).
## Used formats
rpack tools provides and work with two json based files.
### Atlas files
Tilemaps are using `.rpack.json` extension.
Fields:
- `size`: two element array- width and height of the tilemap
- `filename`: string- path to the atlas image file, relative to the config file
- `frames`: array- contain info about each frame in tilemap, contains `key` string field and `frame` field that is made up from fields:
- `h`- image height
- `w`- image width
- `x`- x start pos of the image in the tilemap
- `y`- y start pos of the image in the tilemap
Example:
```json
{
"filename": "tilemap.png",
"frames": [
{
"frame": {
"h": 42,
"w": 42,
"x": 418,
"y": 66
},
"key": "tiles/ship/spaceBuilding_001"
},
{
"frame": {
"h": 44,
"w": 34,
"x": 2,
"y": 2
},
"key": "tiles/agents/spaceAstronauts_004"
},
],
"metadata": {
"app": "rpack",
"app_version": "0.3.0",
"format_version": 1
},
"size": [
512,
512
]
}
```
### Generation config files
Config files are using `.rpack_gen.json` extension.
Fields:
- `output_path`: string- path relative to the config, without extension, this is where tilemap image and `.rpack.json` config file are going to be saved
- `asset_patterns`: array of strings- search patterns for images to be included, relative paths to the config
- `format`: optional(defaults to `Png`), format of the tilemap image, currently supported values: `Png`, `Dds`
- `size`: optional(defaults to `2048`), size of the tilemap image
- `texture_padding`: optional(defaults to `2`), size of the padding between frames in pixel
- `border_padding`: optional(defaults to `0`), size of the padding on the outer edge of the packed image in pixel
- `metadata`: optional, struct containing metadata about the program used to generate the tilemap and version number, stored for the future in case of future breaking changes
Example:
```json
{
"asset_patterns": [
"tiles/agents/*",
"tiles/effects/*",
"tiles/missiles/*",
"tiles/ship/spaceBuilding_00*",
"tiles/ship/spaceBuilding_01*"
],
"output_path": "assets/tilemap",
"format": "Png",
"size": 512,
"texture_padding": 2,
"border_padding": 2,
"size": [
512,
512
]
}
```