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https://github.com/ickshonpe/bevy_heterogeneous_texture_atlas_loader
Load heterogeneous texture atlases with Bevy
https://github.com/ickshonpe/bevy_heterogeneous_texture_atlas_loader
bevy bevy-plugin rust
Last synced: about 1 month ago
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Load heterogeneous texture atlases with Bevy
- Host: GitHub
- URL: https://github.com/ickshonpe/bevy_heterogeneous_texture_atlas_loader
- Owner: ickshonpe
- License: mit
- Created: 2022-02-13T11:27:26.000Z (almost 3 years ago)
- Default Branch: main
- Last Pushed: 2022-11-14T10:36:44.000Z (about 2 years ago)
- Last Synced: 2024-10-29T23:08:08.501Z (about 2 months ago)
- Topics: bevy, bevy-plugin, rust
- Language: Rust
- Homepage:
- Size: 84 KB
- Stars: 7
- Watchers: 3
- Forks: 3
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Bevy Heterogenous Texture Atlas Loader
[](https://crates.io/crates/bevy_heterogeneous_texture_atlas_loader)
[](https://github.com/ickshonpe/bevy_heterogeneous_texture_atlas_loader)
[](https://crates.io/crates/bevy_heterogeneous_texture_atlas_loader)
Bevy Heterogenous Texture Atlas Loader allows you to load heterogenous texture atlases from a RON file manifest.
## Bevy Compatibility
| version | bevy |
| ---------- | ---- |
| 0.10 | 0.9 |
| 0.7 to 0.9 | 0.8 |
| 0.6 | 0.7 |
| < 0.6 | 0.6 |
#
## Basic usage
1. Add to your project's `Cargo.toml` ```[dependencies]``` section
```toml
bevy_heterogeneous_texture_atlas_loader = "0.10.0"
```
1. Add the `TextureAtlasLoaderPlugin` to your Bevy App.
```rust
use bevy_heterogeneous_texture_atlas_loader::*;
app.add_plugin(TextureAtlasLoaderPlugin);
```
2. Add the atlas source image and `.ron` manifest to your assets folder.
3. Load the texture atlas manifest using the asset server:
```rust
let texture_atlas: Handle = asset_server.load(".ron");
```
The plugin will then load the atlas image and create the TextureAtlas asset automatically.
4. The `TextureAtlas`'s sprite indices respect the order of the sprites in the manifest.
Atlas index 0 will be the first sprite in the manifest, 1 the second, and so on.
You can also use the `TextureAtlas::get_texture_index` method to look up the index using an asset path:
```rust
texture_atlas.get_texture_index(&Handle::weak("sprite_name".into()))
```
which you can see used in `\examples\example.rs`
#
## The Manifest
* To create a manifest for a sprite sheet with irregular sized and positioned sprites like:
1. Create a .ron file in your assets folder.
The sprite indices in the output TextureAtlas are ordered implicitly according to the order of the input list sprite rects.
* The `name` field is used to give a sprite a unique name that can be used to look
up their TextureAtlas index using a weak `Handle` with the asset_path
`"sprite_name"`.
```rust
(
// Path to the texture atlas source image file
path: "example.png",
// List of sprites
sprites: [
(
// use a handle with the asset path "rothko"
// to retrieve this sprite's index using TextureAtlas::get_texture_index.
name: "rothko",
// top left x coordinate of the sprite in pixels
x: 18,
// top left y coordinate of the sprite in pixels
y: 19,
// width of the sprite in pixels
w: 46,
// height of the sprite in pixels
h: 48
),
(
name: "face",
x: 93,
y: 108,
w: 32,
h: 31
),
(
name: "patches",
x: 176,
y: 34,
w: 20,
h: 34
),
]
)
```
* If you don't need names for the sprites, you can leave out the `name` field:
```rust
(
path: "example.png",
sprites:[
(
// sprite at atlas index 0
x: 18,
y: 19,
w: 46,
h: 48
),
(
// sprite at atlas index 1
x: 93,
y: 108,
w: 32,
h: 31
),
// ...
]
)
```
## Examples
* `minimal.rs`
Loads a texture atlas and cycles through its textures. Run with
```
cargo run --example minimal
```
* `example.rs`
Example of loading and displaying a texture atlas. Run with
```
cargo run --example example
```
`two.rs`
Another example of loading and displaying texture atlases. Run with
```
cargo run --example example
```
* `bevy_asset_loader.rs`
Example using `bevy_asset_loader` to manage loading. Run with
```
cargo run --example bevy_asset_loader
```