# TRS_24

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An OpenGL-Powered Game Engine in Rust (OpenGL 2.0+) 

## Features
- **Multidimential**: Supports both 3D and 2D rendering.
- **Performance**: Engineered for optimal performance.
- **Cross-Platform**: Supports Windows, MacOS, Linux, and Android builds.
- **OpenGL 2.0 API**: Opens door for diverse GPU/iGPU compatibility.
- **Bundler (WIP)**: Built-in bundling system for Windows, MacOS, Linux, and Android.

## Getting Started
Fundamentally, using two files is the ideal approach for using the engine. Primary file `lib.rs` solely used for running the window on Android and building a shared object (*.so).
Secondary file `main.rs` solely used for testing purposes on the host machine, and building for **Non-Android platforms. Both of these files need to be in the `src` directory.

For both of these files to co-exist, the following needs to be in `Cargo.toml`:
```toml
[lib]
# Causes the production of a dynamic system library
crate-type = ["cdylib"]

[[bin]]
name = "test"
path = "src/main.rs"
```
Both files will have their own respectable structure:

- Structure for `lib.rs`:
   
> [!NOTE] 
> Notice the necessity of `#![cfg(target_os = "android")]` at the first line, and the `#[no_mangle]` attribute before the `android_main` function.
> They NEED to exist, otherwise you'll run to errors and crashes for compliation and building, respectively.

```rust
#![cfg(target_os = "android")]

use trs_24::overture::*;

#[no_mangle]
pub fn android_main(app: AndroidApp) {
    // Creates an event loop for android platforms only.
    let event_loop = EventLoopBuilder::new().with_android_app(app).build();

    // The rest of your code here...
    // 99% of the time, this is the place for the content of the 
    // main function in main.rs, excluding the event_loop definition 
}
```

- Structure for `main.rs`:
```rust
use trs_24::overture::*;

pub fn main() {
    // Creates an event loop for non-android platforms only.
    let event_loop = EventLoopBuilder::new().build();

    // The rest of your code here...
}
```
ℹ️ To try and view a fully complete example, clone the repository and head to the `example` directory.

## Build & Bundle

Full instructions for **Android** and **Non-Android** target platforms are within the wiki page [Build & Bundle](https://github.com/p0ryae/TRS_24/wiki/Build-&-Bundle).