commit 250c3a510a5d994604ff86a65df4b0be26ce27f7
Author: Swrup <swrup@protonmail.com>
Date:   Sun Nov 28 17:53:11 2021 +0100

    brrrrbrrr

diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..2dff00e
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "montociel"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+bevy = "0.5"
+bevy_rapier2d = "*"
+rand = "*"
+
+[package.metadata.android]
+build_targets = ["aarch64-linux-android", "armv7-linux-androideabi"]
+target_sdk_version = 29
+min_sdk_version = 16
diff --git a/assets/cloud.png b/assets/cloud.png
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diff --git a/assets/earth.png b/assets/earth.png
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index 0000000..1509522
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diff --git a/assets/fonts/FiraMono-Medium.ttf b/assets/fonts/FiraMono-Medium.ttf
new file mode 100644
index 0000000..1e95ced
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diff --git a/assets/fonts/FiraSans-Bold.ttf b/assets/fonts/FiraSans-Bold.ttf
new file mode 100644
index 0000000..95e1660
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diff --git a/assets/montociel.png b/assets/montociel.png
new file mode 100644
index 0000000..78ad1e9
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diff --git a/src/cloud.rs b/src/cloud.rs
new file mode 100644
index 0000000..a45e278
--- /dev/null
+++ b/src/cloud.rs
@@ -0,0 +1,190 @@
+use crate::AppState;
+use crate::Materials;
+use bevy::prelude::*;
+use bevy_rapier2d::prelude::*;
+extern crate rand;
+
+pub struct Cloud(Vec2);
+struct NewCloudTimer(Timer);
+pub struct Evil;
+pub struct CloudPlugin;
+
+impl Plugin for CloudPlugin {
+    fn build(&self, app: &mut AppBuilder) {
+        app.init_resource::<NewCloudTimer>()
+            .add_system_set(
+                SystemSet::on_enter(AppState::InGame)
+                    .with_system(cloud_belt.system())
+                    .with_system(spawn_earth.system()),
+            )
+            .add_system_set(
+                SystemSet::on_update(AppState::InGame)
+                    .with_system(cloud_kinematics.system())
+                    .with_system(newcloud_maker.system()),
+            )
+            .add_system_set(
+                SystemSet::on_update(AppState::GameOver)
+                    .with_system(cloud_kinematics.system())
+                    .with_system(newcloud_maker.system()),
+            );
+    }
+}
+
+impl Default for NewCloudTimer {
+    fn default() -> Self {
+        NewCloudTimer(Timer::from_seconds(2., true))
+    }
+}
+
+fn newcloud_maker(
+    mut commands: Commands,
+    rapier_config: Res<RapierConfiguration>,
+    materials: Res<Materials>,
+    time: Res<Time>,
+    mut timer: ResMut<NewCloudTimer>,
+) {
+    if timer.0.tick(time.delta()).just_finished() {
+        use rand::Rng;
+        let mut rng = rand::thread_rng();
+
+        let nb = 4;
+        for _ in 0..nb {
+            let theta = rng.gen_range(0.0..10000.) * 2. * std::f32::consts::PI / nb as f32;
+            let rho = 1.;
+            let speed = rng.gen_range(1.0..5.0);
+            let pos = Vec2::new(f32::cos(theta), f32::sin(theta)) * rho;
+            let vel = Vec2::new(pos.x, pos.y).normalize() * speed;
+            let is_evil = false;
+            spawn_cloud(&mut commands, &rapier_config, &materials, pos, vel, is_evil);
+        }
+    }
+}
+
+fn cloud_belt(
+    mut commands: Commands,
+    rapier_config: Res<RapierConfiguration>,
+    materials: Res<Materials>,
+) {
+    use rand::Rng;
+    let mut rng = rand::thread_rng();
+
+    let nb = 10;
+    for i in 0..nb {
+        let theta = i as f32 * 2. * std::f32::consts::PI / nb as f32;
+        let rho = 10.;
+        let speed = rng.gen_range(0.0..5.0);
+        let pos = Vec2::new(f32::cos(theta), f32::sin(theta)) * rho;
+        let vel = Vec2::new(pos.x, pos.y).normalize() * speed;
+        let is_evil = false;
+        spawn_cloud(&mut commands, &rapier_config, &materials, pos, vel, is_evil);
+    }
+}
+
+fn spawn_earth(
+    mut commands: Commands,
+    rapier_config: Res<RapierConfiguration>,
+    materials: Res<Materials>,
+) {
+    //TODO sapwn mother earth the root of all evil
+    let radius = 60. / rapier_config.scale;
+    let rigid_body = RigidBodyBundle {
+        body_type: RigidBodyType::Static,
+        position: Vec2::new(0., 0.).into(),
+        velocity: RigidBodyVelocity {
+            linvel: Vec2::new(0., 0.).into(),
+            angvel: 0.0,
+        },
+        ..Default::default()
+    };
+    let collider = ColliderBundle {
+        shape: ColliderShape::ball(radius),
+        mass_properties: ColliderMassProps::Density(1.0),
+        material: ColliderMaterial {
+            restitution: 1.0,
+            ..Default::default()
+        },
+        flags: (ActiveEvents::INTERSECTION_EVENTS | ActiveEvents::CONTACT_EVENTS).into(),
+        ..Default::default()
+    };
+    commands
+        .spawn_bundle(rigid_body)
+        .insert_bundle(collider)
+        .insert_bundle(SpriteBundle {
+            material: materials.earth_material.clone(),
+            sprite: Sprite::new(Vec2::new(
+                2. * radius * rapier_config.scale,
+                2. * radius * rapier_config.scale,
+            )),
+            ..Default::default()
+        })
+        .insert(RigidBodyPositionSync::Discrete)
+        .insert(Cloud(Vec2::new(0., 0.)))
+        .insert(Evil);
+}
+
+fn spawn_cloud(
+    commands: &mut Commands,
+    rapier_config: &Res<RapierConfiguration>,
+    materials: &Res<Materials>,
+    pos: Vec2,
+    vel: Vec2,
+    is_evil: bool,
+) {
+    //Spawn a cloud
+    let radius = 15. / rapier_config.scale;
+    let rigid_body = RigidBodyBundle {
+        body_type: RigidBodyType::KinematicVelocityBased,
+        position: pos.into(),
+        velocity: RigidBodyVelocity {
+            linvel: vel.into(),
+            angvel: 0.0,
+        },
+        ..Default::default()
+    };
+    let collider = ColliderBundle {
+        shape: ColliderShape::ball(radius),
+        mass_properties: ColliderMassProps::Density(1.0),
+        material: ColliderMaterial {
+            restitution: 1.0,
+            ..Default::default()
+        },
+        flags: (ActiveEvents::INTERSECTION_EVENTS | ActiveEvents::CONTACT_EVENTS).into(),
+        ..Default::default()
+    };
+    if is_evil {
+        commands
+            .spawn_bundle(rigid_body)
+            .insert_bundle(collider)
+            .insert_bundle(SpriteBundle {
+                material: materials.cloud_material.clone(),
+                sprite: Sprite::new(Vec2::new(
+                    2. * radius * rapier_config.scale,
+                    2. * radius * rapier_config.scale,
+                )),
+                ..Default::default()
+            })
+            .insert(RigidBodyPositionSync::Discrete)
+            .insert(Cloud(vel))
+            .insert(Evil);
+    } else {
+        commands
+            .spawn_bundle(rigid_body)
+            .insert_bundle(collider)
+            .insert_bundle(SpriteBundle {
+                material: materials.cloud_material.clone(),
+                sprite: Sprite::new(Vec2::new(
+                    2. * radius * rapier_config.scale,
+                    2. * radius * rapier_config.scale,
+                )),
+                ..Default::default()
+            })
+            .insert(RigidBodyPositionSync::Discrete)
+            .insert(Cloud(vel));
+    }
+}
+
+fn cloud_kinematics(mut velocities: Query<(&Cloud, &mut RigidBodyVelocity)>) {
+    for (vel, mut next_vel) in velocities.iter_mut() {
+        next_vel.linvel = vel.0.into();
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..7ebe2c8
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,66 @@
+use bevy::prelude::*;
+use bevy_rapier2d::prelude::*;
+
+mod cloud;
+mod montociel;
+mod score;
+mod ui;
+
+use cloud::*;
+use montociel::*;
+use score::*;
+use ui::*;
+
+struct Materials {
+    //TODO background image or smthing
+    montociel_material: Handle<ColorMaterial>,
+    cloud_material: Handle<ColorMaterial>,
+    earth_material: Handle<ColorMaterial>,
+}
+
+impl FromWorld for Materials {
+    fn from_world(world: &mut World) -> Self {
+        let asset_server = world.get_resource::<AssetServer>().unwrap();
+        let montociel_asset = asset_server.load("montociel.png");
+        let cloud_asset = asset_server.load("cloud.png");
+        let earth_asset = asset_server.load("earth.png");
+        let mut materials = world.get_resource_mut::<Assets<ColorMaterial>>().unwrap();
+        let montociel_material = materials.add(montociel_asset.into());
+        let cloud_material = materials.add(cloud_asset.into());
+        let earth_material = materials.add(earth_asset.into());
+        Materials {
+            montociel_material,
+            cloud_material,
+            earth_material,
+        }
+    }
+}
+
+fn setup(mut commands: Commands, mut rapier_config: ResMut<RapierConfiguration>) {
+    rapier_config.scale = 15.;
+    rapier_config.gravity = Vec2::new(0.0, 0.0).into();
+    commands.spawn_bundle(OrthographicCameraBundle::new_2d());
+    commands.spawn_bundle(UiCameraBundle::default());
+}
+
+#[derive(Debug, Clone, Eq, PartialEq, Hash)]
+pub enum AppState {
+    Menu,
+    InGame,
+    GameOver,
+}
+
+fn main() {
+    App::build()
+        .add_plugins(DefaultPlugins)
+        .add_plugin(RapierPhysicsPlugin::<NoUserData>::default())
+        .insert_resource(ClearColor(Color::rgb(1.0, 0.714, 0.757)))
+        .init_resource::<Materials>()
+        .add_plugin(MontocielPlugin)
+        .add_plugin(CloudPlugin)
+        .add_plugin(ScorePlugin)
+        .add_plugin(UIPlugin)
+        .add_state(AppState::Menu)
+        .add_system_set(SystemSet::on_enter(AppState::Menu).with_system(setup.system()))
+        .run();
+}
diff --git a/src/montociel.rs b/src/montociel.rs
new file mode 100644
index 0000000..36f0c9d
--- /dev/null
+++ b/src/montociel.rs
@@ -0,0 +1,214 @@
+use crate::AppState;
+use crate::Evil;
+use crate::Materials;
+use crate::Score;
+use bevy::prelude::*;
+use bevy_rapier2d::prelude::*;
+
+pub struct Montociel;
+pub struct MontocielPlugin;
+
+impl Plugin for MontocielPlugin {
+    fn build(&self, app: &mut AppBuilder) {
+        app.add_system_set(
+            SystemSet::on_enter(AppState::InGame).with_system(spawn_montociel.system()),
+        )
+        .add_system_set(
+            SystemSet::on_update(AppState::InGame)
+                .with_system(input_movement.system())
+                .with_system(montociel_aerodynamism.system())
+                .with_system(update_forces.system())
+                .with_system(clamp_velocity.system())
+                .with_system(cloud_collision.system()),
+        );
+    }
+}
+
+fn spawn_montociel(
+    mut commands: Commands,
+    rapier_config: ResMut<RapierConfiguration>,
+    materials: Res<Materials>,
+) {
+    //Spawn Montociel
+    let radius = 30. / rapier_config.scale;
+    let rigid_body = RigidBodyBundle {
+        body_type: RigidBodyType::Dynamic,
+        position: Vec2::new(10., 10.).into(),
+        velocity: RigidBodyVelocity {
+            linvel: Vec2::new(0.0, 0.0).into(),
+            angvel: 0.4,
+        },
+        ..Default::default()
+    };
+    let collider = ColliderBundle {
+        //collider_type: ColliderType::Sensor,
+        shape: ColliderShape::ball(radius),
+        mass_properties: ColliderMassProps::Density(1.0),
+        material: ColliderMaterial {
+            restitution: 0.0,
+            ..Default::default()
+        },
+        flags: (ActiveEvents::INTERSECTION_EVENTS | ActiveEvents::CONTACT_EVENTS).into(),
+        ..Default::default()
+    };
+
+    commands
+        .spawn_bundle(rigid_body)
+        .insert_bundle(collider)
+        .insert_bundle(SpriteBundle {
+            material: materials.montociel_material.clone(),
+            sprite: Sprite::new(Vec2::new(
+                2. * radius * rapier_config.scale,
+                2. * radius * rapier_config.scale,
+            )),
+            ..Default::default()
+        })
+        .insert(RigidBodyPositionSync::Discrete)
+        .insert(Montociel);
+}
+
+fn input_movement(
+    mouse_input: Res<Input<MouseButton>>,
+    rapier_parameters: Res<RapierConfiguration>,
+    mut montociel_info: Query<(&Montociel, &mut RigidBodyVelocity, &RigidBodyPosition)>,
+) {
+    for (_, mut velocity, pos) in montociel_info.iter_mut() {
+        if mouse_input.get_pressed().len() > 0 {
+            let x = pos.position.translation.x;
+            let y = pos.position.translation.y;
+            let theta = std::f32::consts::PI / 2.;
+            let mut move_delta = Vec2::new(
+                -x * f32::cos(theta) + y * f32::sin(theta),
+                -x * f32::sin(theta) - y * f32::cos(theta),
+            );
+
+            if move_delta != Vec2::new(0., 0.) {
+                // Note that the RapierConfiguration::Scale factor is also used here to transform
+                // the move_delta from: 'pixels/second' to 'physics_units/second'
+                move_delta.normalize();
+                move_delta /= rapier_parameters.scale;
+            }
+
+            // Update the velocity on the rigid_body_component,
+            // the bevy_rapier plugin will update the Sprite transform.
+            // cringeee
+            let power = 0.8;
+            let v_x = power * move_delta.x + velocity.linvel.x;
+            let v_y = power * move_delta.y + velocity.linvel.y;
+            velocity.linvel = Vec2::new(v_x, v_y).into();
+        }
+    }
+}
+
+fn montociel_aerodynamism(mut velocities: Query<&mut RigidBodyVelocity, With<Montociel>>) {
+    for mut velocity in velocities.iter_mut() {
+        let v_x = velocity.linvel.x;
+        let v_y = velocity.linvel.y;
+        let velocity_slowed_by_air = 0.95 * Vec2::new(v_x, v_y);
+        velocity.linvel = velocity_slowed_by_air.into();
+    }
+}
+
+fn update_forces(
+    mut rigid_bodies: Query<
+        (
+            &mut RigidBodyForces,
+            &RigidBodyPosition,
+            &RigidBodyMassProps,
+        ),
+        With<Montociel>,
+    >,
+) {
+    for (mut rb_forces, rb_pos, rb_mass) in rigid_bodies.iter_mut() {
+        let x = rb_pos.position.translation.x;
+        let y = rb_pos.position.translation.y;
+        let d2 = x * x + y * y;
+        let norm = f32::sqrt(d2);
+        let g = 100.;
+        let eps = 0.0001;
+        let nimp = -g * rb_mass.mass() * 1. / (norm + eps);
+        let gravity = Vec2::new(nimp * x, nimp * y).into();
+        rb_forces.force = gravity;
+    }
+}
+
+fn clamp_velocity(
+    mut bodies_info: Query<
+        &mut RigidBodyVelocity, //, With<Montociel>
+    >,
+) {
+    for mut velocity in bodies_info.iter_mut() {
+        let v_x = velocity.linvel.x;
+        let v_y = velocity.linvel.y;
+        let magnitude = f32::sqrt(v_x * v_x + v_y * v_y);
+        let max_magnitude = 70.;
+        if magnitude > 0.01 {
+            let clamped_velocity =
+                Vec2::new(v_x, v_y) / magnitude * f32::min(magnitude, max_magnitude);
+            velocity.linvel = clamped_velocity.into();
+        }
+    }
+}
+
+fn cloud_collision(
+    mut commands: Commands,
+    mut score: ResMut<Score>,
+    mut state: ResMut<State<AppState>>,
+    mut montociel_info: Query<
+        (Entity, &mut RigidBodyVelocity, &RigidBodyPosition),
+        With<Montociel>,
+    >,
+    mut contact_events: EventReader<ContactEvent>,
+    query: Query<Entity, With<Evil>>,
+    rapier_config: Res<RapierConfiguration>,
+) {
+    for contact_event in contact_events.iter() {
+        for (montociel_entity, mut vel, pos) in montociel_info.iter_mut() {
+            match contact_event {
+                ContactEvent::Started(collider1, collider2) => {
+                    let entity1 = collider1.entity();
+                    let entity2 = collider2.entity();
+                    if entity1 != montociel_entity && entity2 != montociel_entity {
+                        continue;
+                    }
+                    let entity = if entity1 == montociel_entity {
+                        entity2
+                    } else {
+                        entity1
+                    };
+                    if query.get(entity).is_ok() {
+                        state.set(AppState::GameOver).unwrap();
+                    } else {
+                        commands.entity(entity).despawn();
+                        jump(pos, &mut vel, &rapier_config);
+                        //increment score
+                        score.incr();
+                    }
+                }
+                ContactEvent::Stopped(_collider1, _collider2) => {}
+            }
+        }
+    }
+}
+
+fn jump(
+    pos: &RigidBodyPosition,
+    vel: &mut RigidBodyVelocity,
+    rapier_config: &Res<RapierConfiguration>,
+) {
+    let x = pos.position.translation.x;
+    let y = pos.position.translation.y;
+    let theta = 3. * std::f32::consts::PI / 4.;
+    let mut move_delta = Vec2::new(
+        -x * f32::cos(theta) + y * f32::sin(theta),
+        -x * f32::sin(theta) - y * f32::cos(theta),
+    );
+    if move_delta != Vec2::new(0., 0.) {
+        move_delta.normalize();
+        move_delta /= rapier_config.scale;
+    }
+    let power = 70.;
+    let v_x = power * move_delta.x + vel.linvel.x;
+    let v_y = power * move_delta.y + vel.linvel.y;
+    vel.linvel = Vec2::new(v_x, v_y).into();
+}
diff --git a/src/score.rs b/src/score.rs
new file mode 100644
index 0000000..e41694f
--- /dev/null
+++ b/src/score.rs
@@ -0,0 +1,85 @@
+use crate::AppState;
+use bevy::prelude::*;
+
+#[derive(Clone, Copy, Debug)]
+pub struct Score {
+    score: u32,
+}
+struct ScoreUI;
+
+impl Default for Score {
+    fn default() -> Self {
+        Score { score: 0 }
+    }
+}
+
+impl Score {
+    pub fn incr(&mut self) {
+        //TODO incr more for each turn
+        self.score += 1;
+    }
+    pub fn reset(&mut self) {
+        self.score = 0;
+    }
+}
+
+pub struct ScorePlugin;
+
+impl Plugin for ScorePlugin {
+    fn build(&self, app: &mut AppBuilder) {
+        app.init_resource::<Score>()
+            .add_system_set(
+                SystemSet::on_enter(AppState::InGame).with_system(setup_score_ui.system()),
+            )
+            .add_system_set(
+                SystemSet::on_update(AppState::InGame).with_system(update_score_ui.system()),
+            );
+    }
+}
+
+fn update_score_ui(score: Res<Score>, mut query: Query<&mut Text, With<ScoreUI>>) {
+    for mut text in query.iter_mut() {
+        text.sections[1].value = format!("{:.2}", score.score);
+    }
+}
+
+fn setup_score_ui(
+    mut commands: Commands,
+    mut score: ResMut<Score>,
+    asset_server: Res<AssetServer>,
+) {
+    //commands.spawn_bundle(UiCameraBundle::default());
+    score.reset();
+    commands
+        .spawn_bundle(TextBundle {
+            style: Style {
+                align_self: AlignSelf::FlexEnd,
+                ..Default::default()
+            },
+            // Use `Text` directly
+            text: Text {
+                // Construct a `Vec` of `TextSection`s
+                sections: vec![
+                    TextSection {
+                        value: "Score: ".to_string(),
+                        style: TextStyle {
+                            font: asset_server.load("fonts/FiraSans-Bold.ttf"),
+                            font_size: 60.0,
+                            color: Color::WHITE,
+                        },
+                    },
+                    TextSection {
+                        value: "0".to_string(),
+                        style: TextStyle {
+                            font: asset_server.load("fonts/FiraMono-Medium.ttf"),
+                            font_size: 60.0,
+                            color: Color::GOLD,
+                        },
+                    },
+                ],
+                ..Default::default()
+            },
+            ..Default::default()
+        })
+        .insert(ScoreUI);
+}
diff --git a/src/ui.rs b/src/ui.rs
new file mode 100644
index 0000000..3678b84
--- /dev/null
+++ b/src/ui.rs
@@ -0,0 +1,93 @@
+use crate::AppState;
+use bevy::prelude::*;
+
+pub struct UIPlugin;
+
+impl Plugin for UIPlugin {
+    fn build(&self, app: &mut AppBuilder) {
+        app.add_system_set(SystemSet::on_enter(AppState::Menu).with_system(setup_button.system()))
+            .add_system_set(
+                SystemSet::on_enter(AppState::GameOver).with_system(setup_button.system()),
+            )
+            .add_system(button_system.system());
+    }
+}
+
+fn button_system(
+    //button_materials: Res<ButtonMaterials>,
+    mut commands: Commands,
+    mut interaction_query: Query<&Interaction, (Changed<Interaction>, With<Button>)>,
+    entities: Query<Entity, Without<bevy::render::camera::Camera>>,
+    button: Query<Entity, With<Button>>,
+    mut state: ResMut<State<AppState>>,
+) {
+    for interaction in interaction_query.iter_mut() {
+        match *interaction {
+            Interaction::Clicked => {
+                match state.current() {
+                    AppState::Menu => {
+                        for button in button.iter() {
+                            commands.entity(button).despawn_recursive();
+                        }
+                        state.set(AppState::InGame).unwrap();
+                    }
+                    AppState::GameOver => {
+                        //despawn all entities
+                        for entity in entities.iter() {
+                            commands.entity(entity).despawn();
+                        }
+                        for button in button.iter() {
+                            commands.entity(button).despawn_recursive();
+                        }
+                        state.set(AppState::InGame).unwrap();
+                    }
+                    AppState::InGame => panic!(),
+                }
+            }
+            Interaction::Hovered => {}
+            Interaction::None => {}
+        }
+    }
+}
+
+fn setup_button(
+    mut commands: Commands,
+    asset_server: Res<AssetServer>,
+    state: Res<State<AppState>>,
+    //button_materials: Res<ButtonMaterials>,
+) {
+    let text = match state.current() {
+        AppState::Menu => "Play!",
+        AppState::InGame => panic!(),
+        AppState::GameOver => "Revive!",
+    };
+    commands
+        .spawn_bundle(ButtonBundle {
+            style: Style {
+                size: Size::new(Val::Px(150.0), Val::Px(65.0)),
+                // center button
+                margin: Rect::all(Val::Auto),
+                // horizontally center child text
+                justify_content: JustifyContent::Center,
+                // vertically center child text
+                align_items: AlignItems::Center,
+                ..Default::default()
+            },
+            //material: button_materials.normal.clone(),
+            ..Default::default()
+        })
+        .with_children(|parent| {
+            parent.spawn_bundle(TextBundle {
+                text: Text::with_section(
+                    text,
+                    TextStyle {
+                        font: asset_server.load("fonts/FiraSans-Bold.ttf"),
+                        font_size: 40.0,
+                        color: Color::rgb(0.9, 0.9, 0.9),
+                    },
+                    Default::default(),
+                ),
+                ..Default::default()
+            });
+        });
+}