euv-engine 0.12.28

A high-performance 2D game engine built on the euv framework, featuring ECS, fixed-timestep game loop, canvas rendering, physics, collision detection, sprite animation, and audio.
Documentation 
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use super::*;

/// The base trait for all game scenes.
///
/// A scene encapsulates a self-contained portion of the game world,
/// managing its own game objects, resources, and update logic.
pub trait Scene: Lifecycle {
    /// Called once when this scene becomes the active scene.
    fn on_enter(&mut self);

    /// Called once when this scene is being replaced or removed.
    fn on_exit(&mut self);

    /// Called every render frame to record the scene's draw commands.
    ///
    /// Instead of drawing immediately, the scene pushes `DrawCommand`s into the
    /// provided `DrawList`; the engine replays the whole list once per frame in
    /// a single batched pass.
    ///
    /// # Arguments
    ///
    /// - `&mut DrawList` - The draw list to record commands into.
    fn on_render(&self, draw_list: &mut DrawList);

    /// Returns the name of this scene for identification.
    ///
    /// # Returns
    ///
    /// - `&str` - The scene name.
    fn name(&self) -> &str;
}