kludgine 0.1.0-dev.3

An asynchronous app and 2d game framework
Documentation 
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use kludgine::prelude::*;

fn main() {
    SingleWindowApplication::run(Simple::default());
}

#[derive(Default)]
struct Simple {
    source_sprite: Option<SpriteSource>,
    rotation_angle: Angle,
}

impl WindowCreator for Simple {
    fn window_title(&self) -> String {
        "Simple - Kludgine".to_owned()
    }
}

impl Window for Simple {
    fn target_fps(&self) -> Option<u16> {
        Some(60)
    }

    fn initialize(
        &mut self,
        _scene: &Target,
        _requester: RedrawRequester,
        _window: WindowHandle,
    ) -> kludgine::Result<()> {
        let texture = Texture::load("kludgine/examples/assets/k.png")?;
        self.source_sprite = Some(SpriteSource::entire_texture(texture));
        Ok(())
    }

    fn update(
        &mut self,
        scene: &Target,
        _status: &mut RedrawStatus,
        _window: WindowHandle,
    ) -> kludgine::Result<()> {
        if let Some(elapsed) = scene.elapsed() {
            self.rotation_angle += Angle::Radians(elapsed.as_secs_f32());
        }

        Ok(())
    }

    fn render(
        &mut self,
        scene: &Target,
        _status: &mut RedrawStatus,
        _window: WindowHandle,
    ) -> kludgine::Result<()> {
        let sprite = self.source_sprite.as_ref().unwrap();

        sprite.render_at(
            scene,
            Rect::new(Point::default(), scene.size()).center(),
            SpriteRotation::around_center(self.rotation_angle),
        );

        Ok(())
    }
}