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/*
 * Blue Engine copyright 2021 © Elham Aryanpur
 *
 * The license is same as the one on the root.
*/

use blue_engine::{
    header::{Engine, ObjectSettings, ShaderSettings},
    primitive_shapes::square,
};

fn main() {
    // Create the engine
    let mut engine = Engine::new().expect("win");

    // create a square
    square(
        // let's give it a name
        "Rotating Square",
        ObjectSettings {
            // and set the size
            // we need it to not cull it's back face so that it's visible on both side
            shader_settings: ShaderSettings {
                cull_mode: None,
                ..Default::default()
            },
            // and have default settings for the rest
            ..Default::default()
        },
        &mut engine.renderer,
        &mut engine.objects,
    )
    .unwrap();

    let radius = 2f32;
    let start = std::time::SystemTime::now();

    engine
        .update_loop(move |_, _, _, _, camera, _| {
            let camx = start.elapsed().unwrap().as_secs_f32().sin() * radius;
            let camz = start.elapsed().unwrap().as_secs_f32().cos() * radius;
            camera
                .set_position(camx, 0.0, camz)
                .expect("Couldn't update the camera eye");
        })
        .expect("Error during update loop");
}