Bevy Educational (thin router)

Genre router. Domain work lives in the Bevy skills below.

When to use

Load this for prompts, answers, and progress flags.

ECS shape

• Components hold a prompt and each choice as plain data.
• Resources hold how many answers were graded and how many were correct.
• Systems select a choice, then grade it. .chain() keeps the grade after the selection.
• Schedule: gameplay mode changes go through bevy-state-machines.

[package]
name = "educational"
version = "0.1.0"
edition = "2021"

[dependencies]
bevy = "0.20"

One prompt, two choices, one progress resource.

#[derive(Component)]
struct Prompt {
    text: String,
}

#[derive(Component)]
struct Choice {
    label: String,
    correct: bool,
    picked: bool,
    graded: bool,
}

#[derive(Resource, Default)]
struct LessonProgress {
    answered: u32,
    correct: u32,
}

fn spawn_lesson(mut commands: Commands) {
    commands.spawn(Prompt {
        text: "Which way is north?".to_string(),
    });
    commands.spawn(Choice {
        label: "Up".to_string(),
        correct: true,
        picked: false,
        graded: false,
    });
    commands.spawn(Choice {
        label: "Down".to_string(),
        correct: false,
        picked: false,
        graded: false,
    });
    commands.init_resource::<LessonProgress>();
}

fn pick_first(mut choices: Query<&mut Choice>) {
    for mut choice in &mut choices {
        if choice.correct && !choice.graded && !choice.picked {
            choice.picked = true;
            break;
        }
    }
}