tdkpin/tdkpin-rs/src/game.rs

use crate::{
    geometry::{Segment, closest_point},
    original_physics::{
        CollisionResponse, GRAVITY_MILLI_PER_STEP, MAXIMUM_SPEED_MILLI_PER_STEP, MilliVec,
        STEP_SECONDS, circle_collision_response, line_collision_response, path_intersects_circle,
    },
    table::{BUMPERS, PASSIVE_CIRCLES, TARGET_SENSORS, WALLS},
};
use macroquad::prelude::{Rect, Vec2, vec2};

const FLIPPER_CONTACT_RADIUS: f32 = 9.0;
const LEFT_FLIPPER_PIVOT: Vec2 = Vec2::new(103.0, 397.0);
const LEFT_FLIPPER_REST_TIP: Vec2 = Vec2::new(134.0, 419.0);
const LEFT_FLIPPER_RAISED_TIP: Vec2 = Vec2::new(133.0, 377.0);
const RIGHT_FLIPPER_PIVOT: Vec2 = Vec2::new(210.0, 397.0);
const RIGHT_FLIPPER_REST_TIP: Vec2 = Vec2::new(179.0, 419.0);
const RIGHT_FLIPPER_RAISED_TIP: Vec2 = Vec2::new(181.0, 376.0);
const TILT_THRESHOLD: f32 = 1.15;
const LAUNCHER_POSITION: Vec2 = Vec2::new(325.0, 413.0);
const LAUNCHER_FRAME_THRESHOLDS: [f32; 10] =
    [0.05, 0.15, 0.25, 0.35, 0.45, 0.55, 0.65, 0.75, 0.85, 0.95];
const LAUNCHER_IMPULSE_MILLI: i32 = 375;
const LAUNCHER_REPEAT_DELAY_SECONDS: f32 = 0.650;
const LAUNCHER_REPEAT_SECONDS: f32 = 0.040;
const CLAW_TRIGGER_CENTER: Vec2 = Vec2::new(289.0, 94.0);
const CLAW_TRIGGER_RADIUS: f32 = 19.0;
// The default original timer fires every 30 ms and advances the claw by one
// frame. Keeping that cadence independent of render rate makes captures
// deterministic on modern machines.
const CLAW_FRAME_SECONDS: f32 = 0.030;
const CLAW_TERMINAL_FRAMES: [u8; 4] = [1, 6, 7, 18];
const ORIGINAL_BALL_SPEED_PER_SECOND: f32 = 3.8 / CLAW_FRAME_SECONDS;

#[derive(Clone, Copy, Debug, Default)]
pub struct Controls {
    pub left_flipper: bool,
    pub right_flipper: bool,
    pub launch_down: bool,
    pub nudge: f32,
}

#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum Event {
    FlipperMove,
    Launch,
    Bumper,
    Target,
    Wheel,
    ClawCapture,
    ClawRelease,
    Lock,
    Media,
    ExtraBall,
    Nudge,
    Tilt,
    Drain,
}

impl Event {
    /// Original Win16 WAVE resource selected by this gameplay transition.
    pub const fn sound_resource(self) -> u16 {
        match self {
            Self::FlipperMove => 2021,
            Self::Launch => 2002,
            Self::Bumper => 2004,
            Self::Target => 2006,
            Self::Wheel => 2011,
            Self::ClawCapture => 2015,
            Self::ClawRelease => 2016,
            Self::Lock => 2017,
            Self::Media => 2022,
            Self::ExtraBall => 2007,
            Self::Nudge => 2019,
            Self::Tilt => 2020,
            Self::Drain => 2008,
        }
    }
}

#[derive(Clone, Copy, Debug, Default)]
pub struct Flippers {
    pub left_raised: bool,
    pub right_raised: bool,
}

#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
pub enum ClawSpriteBank {
    Closing,
    #[default]
    Opening,
}

#[derive(Clone, Copy, Debug)]
pub struct Claw {
    pub active: bool,
    pub frame: u8,
    pub bank: ClawSpriteBank,
    pub ball_suspended: bool,
    target_frame: u8,
    frame_accumulator: f32,
}

impl Default for Claw {
    fn default() -> Self {
        Self {
            active: false,
            frame: 10,
            bank: ClawSpriteBank::Opening,
            ball_suspended: false,
            target_frame: 10,
            frame_accumulator: 0.0,
        }
    }
}

impl Claw {
    pub fn sprite_source(self) -> Option<Rect> {
        if !self.active {
            return None;
        }
        let mut column_frame = self.frame;
        let mut source_y = match self.bank {
            ClawSpriteBank::Closing => 0.0,
            ClawSpriteBank::Opening => 148.0,
        };
        if column_frame > 9 {
            column_frame -= 9;
            source_y += 74.0;
        }
        Some(Rect::new(
            f32::from(column_frame - 1) * 100.0,
            source_y,
            100.0,
            74.0,
        ))
    }
}

#[derive(Clone, Debug)]
pub struct Player {
    pub score: u32,
    pub balls: u8,
    pub extra_balls: u8,
    pub bumper_value: u32,
    pub diamond_segments: u8,
    pub media_level: u8,
}

impl Default for Player {
    fn default() -> Self {
        Self {
            score: 0,
            balls: 3,
            extra_balls: 0,
            bumper_value: 1_000,
            diamond_segments: 0,
            media_level: 0,
        }
    }
}

#[derive(Clone, Copy, Debug)]
pub struct Ball {
    pub position: Vec2,
    pub velocity: Vec2,
    pub in_launcher: bool,
}

#[derive(Clone, Copy, Debug, PartialEq, Eq)]
enum PlayerEntry {
    Open,
    Closed,
}

fn initial_object_activity() -> [bool; 176] {
    let mut active = [true; 176];
    active[0] = false;
    for object_id in [6, 87, 88, 149, 153, 154, 175] {
        active[object_id] = false;
    }
    active
}

impl Default for Ball {
    fn default() -> Self {
        Self {
            position: LAUNCHER_POSITION,
            velocity: Vec2::ZERO,
            in_launcher: true,
        }
    }
}

#[derive(Clone, Debug)]
pub struct Game {
    pub players: Vec<Player>,
    pub current_player: usize,
    pub ball: Ball,
    pub bonus: u32,
    pub wheel_holes: [bool; 8],
    pub side_targets: [bool; 5],
    pub top_targets: [bool; 3],
    pub lock_lights: u8,
    pub magnets: f32,
    pub tilted: bool,
    pub flippers: Flippers,
    pub claw: Claw,
    pub bumper_flash: [f32; 3],
    pub wheel_animation: f32,
    pub nudge_shake: f32,
    pub launcher_charge: f32,
    pub finished: bool,
    pub last_collision_id: Option<u8>,
    accumulator: f32,
    target_cooldown: f32,
    bumper_cooldown: f32,
    nudge_cooldown: f32,
    nudge_meter: f32,
    launcher_was_down: bool,
    launcher_hold_seconds: f32,
    launcher_next_repeat: f32,
    launcher_velocity_milli: i32,
    player_entry: PlayerEntry,
    claw_rng_state: u32,
    pending_flipper_kicks: [bool; 2],
    trigger_contacts: [bool; 176],
    object_active: [bool; 176],
}

impl Game {
    pub fn new(player_count: usize) -> Self {
        Self::new_with_seed(player_count, macroquad::rand::rand())
    }

    pub fn new_with_seed(player_count: usize, seed: u32) -> Self {
        Self {
            players: vec![Player::default(); player_count.clamp(1, 4)],
            current_player: 0,
            ball: Ball::default(),
            bonus: 0,
            wheel_holes: [false; 8],
            side_targets: [false; 5],
            top_targets: [false; 3],
            lock_lights: 0,
            magnets: 0.0,
            tilted: false,
            flippers: Flippers::default(),
            claw: Claw::default(),
            bumper_flash: [0.0; 3],
            wheel_animation: 0.0,
            nudge_shake: 0.0,
            launcher_charge: 0.0,
            finished: false,
            last_collision_id: None,
            accumulator: 0.0,
            target_cooldown: 0.0,
            bumper_cooldown: 0.0,
            nudge_cooldown: 0.0,
            nudge_meter: 0.0,
            launcher_was_down: false,
            launcher_hold_seconds: 0.0,
            launcher_next_repeat: LAUNCHER_REPEAT_DELAY_SECONDS,
            launcher_velocity_milli: 0,
            player_entry: PlayerEntry::Open,
            claw_rng_state: seed.max(1),
            pending_flipper_kicks: [false; 2],
            trigger_contacts: [false; 176],
            object_active: initial_object_activity(),
        }
    }

    pub fn player(&self) -> &Player {
        &self.players[self.current_player]
    }

    pub fn launcher_frame(&self) -> usize {
        LAUNCHER_FRAME_THRESHOLDS.partition_point(|threshold| self.launcher_charge >= *threshold)
    }

    pub fn add_player_before_launch(&mut self) -> bool {
        if self.player_entry == PlayerEntry::Closed || self.players.len() >= 4 {
            return false;
        }
        self.players.push(Player::default());
        true
    }

    pub(crate) fn begin_claw_scenario(&mut self, terminal_frame: u8) -> Vec<Event> {
        self.ball.in_launcher = false;
        self.ball.position = CLAW_TRIGGER_CENTER;
        self.ball.velocity = Vec2::ZERO;
        let mut events = Vec::new();
        self.begin_claw_capture(terminal_frame, &mut events);
        events
    }

    fn fire_launcher(&mut self) {
        self.launcher_velocity_milli -= LAUNCHER_IMPULSE_MILLI;
        let mut launch_velocity = self.launcher_velocity_milli;
        if launch_velocity < -MAXIMUM_SPEED_MILLI_PER_STEP {
            let variation = (self.next_random_value()
                % u32::try_from(MAXIMUM_SPEED_MILLI_PER_STEP).unwrap_or(3_800))
                / 40;
            launch_velocity =
                -MAXIMUM_SPEED_MILLI_PER_STEP + i32::try_from(variation).unwrap_or_default();
        }
        self.ball.in_launcher = false;
        self.ball.velocity = MilliVec {
            x: 0,
            y: launch_velocity,
        }
        .to_velocity_per_second();
        self.launcher_charge = 0.0;
        self.launcher_was_down = false;
        self.launcher_hold_seconds = 0.0;
        self.launcher_next_repeat = LAUNCHER_REPEAT_DELAY_SECONDS;
        self.launcher_velocity_milli = 0;
        self.player_entry = PlayerEntry::Closed;
    }

    pub fn update(&mut self, frame_time: f32, _detail: u8, controls: Controls) -> Vec<Event> {
        if self.finished {
            return Vec::new();
        }
        self.last_collision_id = None;
        let mut events = Vec::new();
        let old_flippers = self.flippers;
        self.flippers.left_raised = controls.left_flipper && !self.tilted;
        self.flippers.right_raised = controls.right_flipper && !self.tilted;
        if self.flippers.left_raised != old_flippers.left_raised {
            events.push(Event::FlipperMove);
            self.pending_flipper_kicks[0] = self.flippers.left_raised;
        }
        if self.flippers.right_raised != old_flippers.right_raised {
            events.push(Event::FlipperMove);
            self.pending_flipper_kicks[1] = self.flippers.right_raised;
        }

        if self.ball.in_launcher && !self.tilted {
            if controls.launch_down {
                if self.launcher_was_down {
                    self.launcher_hold_seconds += frame_time.min(0.05);
                    while self.launcher_hold_seconds >= self.launcher_next_repeat {
                        self.launcher_velocity_milli -= LAUNCHER_IMPULSE_MILLI;
                        self.launcher_next_repeat += LAUNCHER_REPEAT_SECONDS;
                    }
                } else {
                    self.launcher_velocity_milli -= LAUNCHER_IMPULSE_MILLI;
                    self.launcher_was_down = true;
                }
                let charge_milli =
                    (-self.launcher_velocity_milli).clamp(0, MAXIMUM_SPEED_MILLI_PER_STEP);
                self.launcher_charge =
                    f32::from(i16::try_from(charge_milli).unwrap_or(3_800)) / f32::from(3_800_i16);
            } else if self.launcher_was_down {
                self.fire_launcher();
                events.push(Event::Launch);
            }
        }
        if !self.tilted
            && !self.ball.in_launcher
            && controls.nudge.abs() > 0.1
            && self.nudge_cooldown <= 0.0
        {
            self.ball.velocity.x += controls.nudge * 55.0;
            self.nudge_meter += controls.nudge.abs() * 0.34;
            self.nudge_cooldown = 0.22;
            self.nudge_shake = 0.18;
            if self.nudge_meter >= TILT_THRESHOLD {
                self.tilted = true;
                self.bonus = 0;
                events.push(Event::Tilt);
            } else {
                events.push(Event::Nudge);
            }
        }

        self.accumulator = (self.accumulator + frame_time.min(0.05)).min(0.1);
        while self.accumulator >= STEP_SECONDS {
            self.fixed_update(STEP_SECONDS, &mut events);
            self.accumulator -= STEP_SECONDS;
        }
        events
    }

    #[allow(clippy::too_many_lines)]
    fn fixed_update(&mut self, dt: f32, events: &mut Vec<Event>) {
        self.target_cooldown = (self.target_cooldown - dt).max(0.0);
        self.bumper_cooldown = (self.bumper_cooldown - dt).max(0.0);
        self.nudge_cooldown = (self.nudge_cooldown - dt).max(0.0);
        self.magnets = (self.magnets - dt).max(0.0);
        self.wheel_animation = (self.wheel_animation - dt).max(0.0);
        self.nudge_shake = (self.nudge_shake - dt).max(0.0);
        for flash in &mut self.bumper_flash {
            *flash = (*flash - dt).max(0.0);
        }
        if !self.tilted {
            self.nudge_meter = (self.nudge_meter - dt * 0.34).max(0.0);
        }

        self.update_claw(dt, events);
        if self.claw.ball_suspended {
            self.pending_flipper_kicks.fill(false);
            return;
        }

        if self.ball.in_launcher {
            self.ball.position = LAUNCHER_POSITION;
            self.ball.velocity = Vec2::ZERO;
            return;
        }

        let old_position = MilliVec::from_position(self.ball.position);
        let mut velocity = MilliVec::from_velocity_per_second(self.ball.velocity);
        velocity.y += GRAVITY_MILLI_PER_STEP;
        velocity.clamp_speed(MAXIMUM_SPEED_MILLI_PER_STEP);
        let movement_velocity = velocity;
        let mut position = old_position.add(velocity);
        let mut best_collision: Option<(u8, bool, CollisionResponse)> = None;
        for object_id in 1..=175 {
            if !self.object_active[usize::from(object_id)] {
                continue;
            }
            if self.claw.active && (12..=20).contains(&object_id) {
                continue;
            }
            if let Some(wall) = WALLS.iter().find(|wall| wall.id == object_id) {
                let segment = self.live_wall_segment(wall.id, wall.segment);
                if let Some(response) = line_collision_response(
                    old_position,
                    velocity,
                    segment.start,
                    segment.end,
                    f64::from(wall.normal_rebound),
                    f64::from(wall.tangent_coupling),
                ) && best_collision
                    .is_none_or(|(_, _, closest)| response.progress < closest.progress)
                {
                    best_collision = Some((wall.id, true, response));
                }
            }
            let circle = PASSIVE_CIRCLES
                .iter()
                .chain(BUMPERS.iter())
                .find(|circle| circle.id == object_id);
            if let Some(circle) = circle
                && let Some(response) = circle_collision_response(
                    old_position,
                    velocity,
                    self.live_circle_center(circle.id, circle.center),
                    circle.contact_radius,
                    f64::from(circle.normal_rebound),
                    f64::from(circle.tangent_coupling),
                    f64::from(circle.normal_kick),
                )
                && best_collision.is_none_or(|(_, _, closest)| response.progress < closest.progress)
            {
                best_collision = Some((circle.id, false, response));
            }
        }
        let (hit_wall, hit_circle) = if let Some((object_id, is_wall, response)) = best_collision {
            velocity = response.velocity;
            position = old_position.add(velocity);
            self.last_collision_id = Some(object_id);
            if is_wall {
                (Some(object_id), None)
            } else {
                (None, Some(object_id))
            }
        } else {
            (None, None)
        };
        self.ball.position = position.to_position();
        self.ball.velocity = velocity.to_velocity_per_second();

        if let Some(wall_id) = hit_wall {
            if wall_id == 2 {
                if self.magnets > 0.0
                    && (self.ball.position.x < 145.0 || self.ball.position.x > 175.0)
                {
                    self.ball.position.y = 410.0;
                    self.ball.velocity = vec2((157.0 - self.ball.position.x) * 2.0, -245.0);
                    self.magnets = 0.0;
                } else {
                    self.drain(events);
                }
                return;
            }
            if wall_id == 25
                && i64::from(velocity.x).pow(2) + i64::from(velocity.y).pow(2) < 1_000_i64.pow(2)
            {
                self.ball = Ball::default();
                self.launcher_charge = 0.0;
                self.launcher_was_down = false;
                return;
            }
            self.apply_wall_rule(wall_id, events);
        }

        if let Some(index) = hit_circle
            .and_then(|circle_id| BUMPERS.iter().position(|bumper| bumper.id == circle_id))
            && !self.tilted
            && self.bumper_cooldown <= 0.0
        {
            self.add_score(self.player().bumper_value);
            self.bonus = self.bonus.saturating_add(100);
            self.bumper_cooldown = 0.08;
            self.bumper_flash[index] = 0.16;
            events.push(Event::Bumper);
        }

        self.check_sensor_objects(old_position, movement_velocity, events);
        if self.claw.ball_suspended {
            return;
        }

        if !self.tilted {
            self.check_targets(events);
            self.check_media(events);
        }
        if self.claw.ball_suspended {
            return;
        }

        self.apply_flipper_kicks();

        if self.ball.position.y > 470.0 {
            // Only malformed/out-of-table states reach this guard; the real
            // drain is collision object 2 at y=455.
            self.drain(events);
        }
    }

    fn check_targets(&mut self, events: &mut Vec<Event>) {
        if self.target_cooldown > 0.0 {
            return;
        }
        let position = self.ball.position;

        let wheel_center = vec2(114.0, 79.0);
        let from_wheel = position - wheel_center;
        if (25.0..=43.0).contains(&from_wheel.length()) {
            let angle =
                (from_wheel.y.atan2(from_wheel.x) + std::f32::consts::TAU) % std::f32::consts::TAU;
            let sector_boundaries = [
                std::f32::consts::TAU / 16.0,
                std::f32::consts::TAU * 3.0 / 16.0,
                std::f32::consts::TAU * 5.0 / 16.0,
                std::f32::consts::TAU * 7.0 / 16.0,
                std::f32::consts::TAU * 9.0 / 16.0,
                std::f32::consts::TAU * 11.0 / 16.0,
                std::f32::consts::TAU * 13.0 / 16.0,
                std::f32::consts::TAU * 15.0 / 16.0,
            ];
            let hole = sector_boundaries.partition_point(|boundary| angle >= *boundary) % 8;
            if !self.wheel_holes[hole] {
                self.wheel_holes[hole] = true;
                self.add_score(2_500);
                self.target_cooldown = 0.15;
                self.wheel_animation = 0.65;
                events.push(Event::Wheel);
            }
            if self.wheel_holes.iter().all(|hole| *hole) {
                self.wheel_holes.fill(false);
                self.add_score(25_000);
            }
        }

        if (151.0..=220.0).contains(&position.x) && (187.0..=205.0).contains(&position.y) {
            self.lock_lights = (self.lock_lights + 1).min(4);
            self.add_score(u32::from(self.lock_lights) * 5_000);
            self.ball.position = vec2(185.0, 181.0);
            self.ball.velocity = vec2(-40.0 + f32::from(self.lock_lights) * 18.0, -120.0);
            self.target_cooldown = 0.4;
            events.push(Event::Lock);
        }
    }

    fn apply_wall_rule(&mut self, object_id: u8, events: &mut Vec<Event>) {
        let wall = WALLS
            .iter()
            .find(|wall| wall.id == object_id)
            .expect("a wall collision id must reference a recovered wall");
        if !self.tilted && wall.score != 0 {
            self.add_score(wall.score);
            events.push(if object_id == 121 {
                Event::Wheel
            } else {
                Event::Target
            });
        }

        if wall.flags & 0x0002 != 0 {
            let group = usize::from(wall.contact_group);
            self.object_active[group] = false;
            if wall.flags & 0x2000 != 0 {
                self.object_active[group + 1] = false;
                self.object_active[group + 2] = false;
            }
        }
        if wall.flags & 0x0008 != 0
            && [90, 93, 96, 99, 102]
                .into_iter()
                .all(|id| !self.object_active[id])
        {
            let player = &mut self.players[self.current_player];
            let completion_bonus = if player.bumper_value >= 6_000 {
                50_000
            } else {
                player.bumper_value += 1_000;
                0
            };
            self.add_score(completion_bonus);
            self.side_targets.fill(false);
            for active in &mut self.object_active[90..=104] {
                *active = true;
            }
        }
        if wall.flags & 0x0010 != 0
            && [109, 112, 115, 118]
                .into_iter()
                .all(|id| !self.object_active[id])
        {
            let player = &mut self.players[self.current_player];
            player.diamond_segments = (player.diamond_segments + 1).min(9);
            let value = u32::from(player.diamond_segments) * 10_000;
            self.add_score(value);
            for active in &mut self.object_active[109..=120] {
                *active = true;
            }
        }
        if wall.flags & 0x0400 != 0 {
            self.wheel_animation = 0.65;
        }
    }

    fn check_media(&mut self, events: &mut Vec<Event>) {
        const THRESHOLDS: [u32; 5] = [360_000, 720_000, 1_440_000, 2_880_000, 5_760_000];
        let score = self.player().score;
        let level =
            u8::try_from(THRESHOLDS.partition_point(|threshold| score >= *threshold)).unwrap_or(5);
        if level > self.player().media_level {
            let player = &mut self.players[self.current_player];
            player.media_level = level;
            player.extra_balls = player.extra_balls.saturating_add(1);
            events.push(Event::Media);
            events.push(Event::ExtraBall);
        }
    }

    fn check_sensor_objects(
        &mut self,
        old_position: MilliVec,
        movement_velocity: MilliVec,
        events: &mut Vec<Event>,
    ) {
        if !self.claw.active
            && path_intersects_circle(
                old_position,
                movement_velocity,
                CLAW_TRIGGER_CENTER,
                CLAW_TRIGGER_RADIUS,
            )
        {
            let terminal_frame = self.next_claw_terminal_frame();
            self.begin_claw_capture(terminal_frame, events);
            return;
        }

        let current_position = MilliVec::from_position(self.ball.position);
        for sensor in TARGET_SENSORS {
            let touched = path_intersects_circle(
                old_position,
                movement_velocity,
                sensor.center,
                sensor.radius,
            );
            let contact_index = usize::from(sensor.id);
            let entered = touched && !self.trigger_contacts[contact_index];
            self.trigger_contacts[contact_index] = path_intersects_circle(
                current_position,
                MilliVec::default(),
                sensor.center,
                sensor.radius,
            );
            if !entered || self.tilted {
                continue;
            }
            self.add_score(sensor.score);
            events.push(Event::Target);
            if (150..=152).contains(&sensor.id) {
                self.top_targets[usize::from(sensor.id - 150)] = true;
                self.magnets = self.magnets.max(0.3);
            }
        }
    }

    fn next_claw_terminal_frame(&mut self) -> u8 {
        let value = self.next_random_value();
        CLAW_TERMINAL_FRAMES[value as usize % CLAW_TERMINAL_FRAMES.len()]
    }

    fn next_random_value(&mut self) -> u32 {
        let mut value = self.claw_rng_state;
        value ^= value << 13;
        value ^= value >> 17;
        value ^= value << 5;
        self.claw_rng_state = value;
        value
    }

    fn apply_flipper_kicks(&mut self) {
        let pending = self.pending_flipper_kicks;
        self.pending_flipper_kicks.fill(false);
        if self.ball.in_launcher || self.tilted {
            return;
        }

        for (should_kick, pivot, rest_tip, raised_tip, horizontal_sign) in [
            (
                pending[0],
                LEFT_FLIPPER_PIVOT,
                LEFT_FLIPPER_REST_TIP,
                LEFT_FLIPPER_RAISED_TIP,
                1.0,
            ),
            (
                pending[1],
                RIGHT_FLIPPER_PIVOT,
                RIGHT_FLIPPER_REST_TIP,
                RIGHT_FLIPPER_RAISED_TIP,
                -1.0,
            ),
        ] {
            if !should_kick
                || !point_in_flipper_sweep(self.ball.position, pivot, rest_tip, raised_tip)
            {
                continue;
            }
            let local_x = (self.ball.position.x - pivot.x) * horizontal_sign;
            let local_y = self.ball.position.y - pivot.y;
            let horizontal_displacement =
                0.002_12 * local_x.powi(2) - 0.125_68 * local_x + 14.921 - (local_y + 7.0);
            let vertical_displacement = -(local_x + 13.0);
            let velocity_scale = -0.026 * local_x.powi(2) + 3.614 * local_x + 101.327;
            let displacement = vec2(
                horizontal_displacement * horizontal_sign,
                vertical_displacement,
            );
            self.ball.position += displacement;
            let velocity_milli = MilliVec::from_millipixels(displacement * velocity_scale);
            self.ball.velocity = velocity_milli.to_velocity_per_second();
        }
    }

    fn begin_claw_capture(&mut self, terminal_frame: u8, events: &mut Vec<Event>) {
        debug_assert!(CLAW_TERMINAL_FRAMES.contains(&terminal_frame));
        if self.claw.active {
            return;
        }
        self.claw.active = true;
        self.claw.target_frame = terminal_frame;
        self.claw.bank = ClawSpriteBank::Closing;
        self.claw.ball_suspended = true;
        self.claw.frame_accumulator = 0.0;
        self.ball.velocity = Vec2::ZERO;
        events.push(Event::ClawCapture);
    }

    fn update_claw(&mut self, dt: f32, events: &mut Vec<Event>) {
        if !self.claw.active {
            return;
        }
        self.claw.frame_accumulator += dt;
        while self.claw.active && self.claw.frame_accumulator >= CLAW_FRAME_SECONDS {
            self.claw.frame_accumulator -= CLAW_FRAME_SECONDS;
            self.advance_claw(events);
        }
    }

    fn advance_claw(&mut self, events: &mut Vec<Event>) {
        if self.claw.frame != self.claw.target_frame {
            if self.claw.frame < self.claw.target_frame {
                self.claw.frame += 1;
            } else {
                self.claw.frame -= 1;
            }
            return;
        }

        if self.claw.frame == 10 {
            if self.claw.bank == ClawSpriteBank::Opening {
                self.claw = Claw::default();
            }
            return;
        }

        let release_frame = self.claw.frame;
        self.claw.target_frame = 10;
        self.claw.bank = ClawSpriteBank::Opening;
        (self.ball.position, self.ball.velocity) = claw_release(release_frame);
        self.claw.ball_suspended = false;
        events.push(Event::ClawRelease);
    }

    fn add_score(&mut self, points: u32) {
        let multiplier = if self.player().diamond_segments == 9 {
            2
        } else {
            1
        };
        let player = &mut self.players[self.current_player];
        player.score = player
            .score
            .saturating_add(points.saturating_mul(multiplier));
    }

    fn drain(&mut self, events: &mut Vec<Event>) {
        let player = &mut self.players[self.current_player];
        player.score = player.score.saturating_add(self.bonus);
        if player.extra_balls > 0 {
            player.extra_balls -= 1;
        } else {
            player.balls = player.balls.saturating_sub(1);
        }
        events.push(Event::Drain);
        self.bonus = 0;
        self.side_targets.fill(false);
        self.top_targets.fill(false);
        self.wheel_holes.fill(false);
        self.lock_lights = 0;
        self.magnets = 0.0;
        self.tilted = false;
        self.nudge_meter = 0.0;
        self.bumper_flash.fill(0.0);
        self.wheel_animation = 0.0;
        self.claw = Claw::default();
        self.trigger_contacts.fill(false);
        self.object_active = initial_object_activity();
        self.nudge_shake = 0.0;
        self.launcher_charge = 0.0;
        self.launcher_was_down = false;
        self.launcher_hold_seconds = 0.0;
        self.launcher_next_repeat = LAUNCHER_REPEAT_DELAY_SECONDS;
        self.launcher_velocity_milli = 0;

        let mut next = (self.current_player + 1) % self.players.len();
        for _ in 0..self.players.len() {
            if self.players[next].balls > 0 || self.players[next].extra_balls > 0 {
                self.current_player = next;
                self.ball = Ball::default();
                return;
            }
            next = (next + 1) % self.players.len();
        }
        self.finished = true;
    }

    fn live_wall_segment(&self, object_id: u8, resting: Segment) -> Segment {
        let (start, end) = match object_id {
            66 if self.flippers.left_raised => (vec2(98.0, 382.0), vec2(131.0, 369.0)),
            68 if self.flippers.left_raised => (vec2(137.0, 384.0), vec2(116.0, 405.0)),
            81 if self.flippers.right_raised => (vec2(197.0, 405.0), vec2(171.0, 378.0)),
            83 if self.flippers.right_raised => (vec2(183.0, 368.0), vec2(217.0, 383.0)),
            _ => return resting,
        };
        Segment::new(start, end, resting.bounce)
    }

    fn live_circle_center(&self, object_id: u8, resting: Vec2) -> Vec2 {
        match object_id {
            67 if self.flippers.left_raised => LEFT_FLIPPER_RAISED_TIP,
            82 if self.flippers.right_raised => RIGHT_FLIPPER_RAISED_TIP,
            _ => resting,
        }
    }
}

fn claw_release(frame: u8) -> (Vec2, Vec2) {
    let (position, direction) = match frame {
        1 => (vec2(258.0, 78.0), vec2(-0.60, 0.00)),
        2 => (vec2(259.0, 81.0), vec2(-0.45, 0.05)),
        3 => (vec2(258.0, 78.0), vec2(-0.70, 0.30)),
        4 => (vec2(261.0, 86.0), vec2(-0.30, 0.20)),
        5 => (vec2(266.0, 90.0), vec2(-0.32, 0.22)),
        6 => (vec2(270.0, 94.0), vec2(-0.40, 0.60)),
        7 => (vec2(275.0, 97.0), vec2(-0.31, 0.70)),
        8 => (vec2(278.0, 98.0), vec2(-0.20, 0.80)),
        9 => (vec2(282.0, 101.0), vec2(-0.10, 0.90)),
        18 => return (vec2(325.0, 92.0), vec2(0.0, 1.0 / CLAW_FRAME_SECONDS)),
        _ => unreachable!("the original claw only releases from a terminal frame"),
    };
    (position, direction * ORIGINAL_BALL_SPEED_PER_SECOND)
}

fn point_in_flipper_sweep(point: Vec2, pivot: Vec2, rest_tip: Vec2, raised_tip: Vec2) -> bool {
    let boundary_distance_squared = [
        Segment::new(pivot, rest_tip, 0.0),
        Segment::new(pivot, raised_tip, 0.0),
        Segment::new(rest_tip, raised_tip, 0.0),
    ]
    .into_iter()
    .map(|segment| point.distance_squared(closest_point(point, segment)))
    .fold(f32::INFINITY, f32::min);
    if boundary_distance_squared <= FLIPPER_CONTACT_RADIUS.powi(2) {
        return true;
    }

    let cross = |a: Vec2, b: Vec2, p: Vec2| (b - a).perp_dot(p - a);
    let signs = [
        cross(pivot, rest_tip, point),
        cross(rest_tip, raised_tip, point),
        cross(raised_tip, pivot, point),
    ];
    signs.iter().all(|value| *value >= 0.0) || signs.iter().all(|value| *value <= 0.0)
}

#[allow(clippy::too_many_lines)]
#[cfg(test)]
mod tests {
    use super::*;

    fn launch_ball(game: &mut Game, held_frames: usize) -> Vec<Event> {
        for _ in 0..held_frames {
            game.update(
                1.0 / 60.0,
                3,
                Controls {
                    launch_down: true,
                    ..Controls::default()
                },
            );
        }
        game.update(1.0 / 60.0, 3, Controls::default())
    }

    #[test]
    fn player_count_is_bounded() {
        assert_eq!(Game::new(0).players.len(), 1);
        assert_eq!(Game::new(99).players.len(), 4);
    }

    #[test]
    fn plus_adds_players_only_before_the_first_launch() {
        let mut game = Game::new(1);

        assert!(game.add_player_before_launch());
        assert!(game.add_player_before_launch());
        assert!(game.add_player_before_launch());
        assert!(!game.add_player_before_launch());
        assert_eq!(game.players.len(), 4);

        let mut game = Game::new(1);
        launch_ball(&mut game, 1);
        assert!(!game.add_player_before_launch());
        assert_eq!(game.players.len(), 1);
    }

    #[test]
    fn ball_starts_in_the_recovered_shooter_lane() {
        let game = Game::new(1);

        assert_eq!(game.ball.position, Vec2::new(325.0, 413.0));
        assert!(game.ball.in_launcher);
    }

    #[test]
    fn launcher_charges_while_held_and_fires_on_release() {
        let mut game = Game::new(1);
        game.update(
            1.0 / 60.0,
            3,
            Controls {
                launch_down: true,
                ..Controls::default()
            },
        );

        assert!(game.ball.in_launcher);
        assert!(game.launcher_charge > 0.0);

        let events = game.update(1.0 / 60.0, 3, Controls::default());

        assert!(events.contains(&Event::Launch));
        assert!(!game.ball.in_launcher);
        assert!(game.ball.velocity.y < 0.0);
    }

    #[test]
    fn holding_the_launcher_produces_a_faster_shot() {
        let mut quick = Game::new(1);
        launch_ball(&mut quick, 1);
        let quick_speed = -quick.ball.velocity.y;

        let mut charged = Game::new(1);
        launch_ball(&mut charged, 60);
        let charged_speed = -charged.ball.velocity.y;

        assert!(charged_speed > quick_speed + 80.0);
    }

    #[test]
    fn maximum_launch_requires_a_deliberate_hold() {
        let mut game = Game::new(1);
        let held = Controls {
            launch_down: true,
            ..Controls::default()
        };

        for _ in 0..30 {
            game.update(1.0 / 60.0, 3, held);
        }
        assert!((0.09..0.11).contains(&game.launcher_charge));
        assert_eq!(game.launcher_frame(), 1);

        for _ in 0..30 {
            game.update(1.0 / 60.0, 3, held);
        }
        assert!(game.launcher_charge >= 0.95);
        assert_eq!(game.launcher_frame(), 10);
    }

    #[test]
    fn charged_ball_clears_the_shooter_lane() {
        for detail in 1..=5 {
            let mut game = Game::new(1);
            launch_ball(&mut game, 60);
            let mut entered_table = false;
            let mut returned_to_launcher = false;
            let mut minimum_y = game.ball.position.y;

            for _ in 0..480 {
                game.update(1.0 / 120.0, detail, Controls::default());
                minimum_y = minimum_y.min(game.ball.position.y);
                if game.ball.position.x < 280.0 && game.ball.position.y > 30.0 {
                    entered_table = true;
                }
                returned_to_launcher |= game.ball.in_launcher;
            }

            assert!(
                entered_table,
                "detail {detail}: the shooter curve should guide the ball onto the table; position={:?}, velocity={:?}, minimum_y={minimum_y}",
                game.ball.position, game.ball.velocity
            );
            assert!(
                !returned_to_launcher,
                "detail {detail}: a launched ball must not rebound into the launcher"
            );
        }
    }

    #[test]
    fn shooter_stop_rearms_a_returning_ball() {
        let mut game = Game::new(1);
        game.ball.in_launcher = false;
        game.ball.position = Vec2::new(325.0, 410.0);
        game.ball.velocity = Vec2::new(0.0, 180.0);

        for _ in 0..8 {
            game.update(1.0 / 120.0, 5, Controls::default());
            if game.ball.in_launcher {
                break;
            }
        }

        assert!(game.ball.in_launcher);
        assert_eq!(game.ball.position, LAUNCHER_POSITION);
        assert_eq!(game.ball.velocity, Vec2::ZERO);
    }

    #[test]
    fn completed_diamond_doubles_score() {
        let mut game = Game::new(1);
        game.players[0].diamond_segments = 9;
        game.add_score(1_000);
        assert_eq!(game.players[0].score, 2_000);
    }

    #[test]
    fn recovered_target_banks_deactivate_and_rearm_their_line_groups() {
        let mut game = Game::new(1);
        let mut events = Vec::new();

        for object_id in [90, 93, 96, 99, 102] {
            game.apply_wall_rule(object_id, &mut events);
        }
        assert_eq!(game.player().bumper_value, 2_000);
        assert!(game.object_active[90..=104].iter().all(|active| *active));

        for object_id in [109, 112, 115, 118] {
            game.apply_wall_rule(object_id, &mut events);
        }
        assert_eq!(game.player().diamond_segments, 1);
        assert!(game.object_active[109..=120].iter().all(|active| *active));
    }

    #[test]
    fn center_drain_advances_to_a_fresh_ball() {
        let mut game = Game::new(1);
        game.ball.in_launcher = false;
        game.ball.position = vec2(157.0, 450.0);
        game.ball.velocity = vec2(0.0, 300.0);

        let events = game.update(1.0 / 30.0, 5, Controls::default());

        assert!(events.contains(&Event::Drain));
        assert_eq!(game.players[0].balls, 2);
        assert!(game.ball.in_launcher);
    }

    #[test]
    fn fast_ball_cannot_tunnel_through_the_top_rail() {
        let mut game = Game::new(1);
        game.ball.in_launcher = false;
        game.ball.position = vec2(270.0, 30.0);
        game.ball.velocity = vec2(0.0, -380.0);

        for _ in 0..5 {
            game.fixed_update(STEP_SECONDS, &mut Vec::new());
        }

        assert!(game.ball.position.y >= 15.0);
        assert!(game.ball.velocity.y > 0.0);
    }

    #[test]
    fn tilt_latches_and_disables_flippers_and_scoring() {
        let mut game = Game::new(1);
        assert!(launch_ball(&mut game, 1).contains(&Event::Launch));
        game.bonus = 4_000;
        for _ in 0..4 {
            game.nudge_cooldown = 0.0;
            game.update(
                1.0 / 60.0,
                3,
                Controls {
                    nudge: 1.0,
                    ..Controls::default()
                },
            );
        }
        assert!(game.tilted);
        assert_eq!(game.bonus, 0);

        game.flippers.left_raised = true;
        game.flippers.right_raised = true;
        let score = game.player().score;
        game.ball.in_launcher = false;
        game.ball.position = vec2(201.0, 285.0);
        game.ball.velocity = Vec2::ZERO;
        game.update(
            1.0 / 30.0,
            5,
            Controls {
                left_flipper: true,
                right_flipper: true,
                ..Controls::default()
            },
        );

        assert!(!game.flippers.left_raised);
        assert!(!game.flippers.right_raised);
        assert_eq!(game.player().score, score);
    }

    #[test]
    fn flippers_use_the_recovered_binary_positions() {
        let mut game = Game::new(1);
        let wall = |id| {
            WALLS
                .iter()
                .find(|wall| wall.id == id)
                .expect("flipper wall exists")
                .segment
        };
        let left_leading = game.live_wall_segment(66, wall(66));
        let right_leading = game.live_wall_segment(81, wall(81));
        assert_eq!(
            (left_leading.start, left_leading.end),
            (vec2(112.0, 386.0), vec2(141.0, 413.0))
        );
        assert_eq!(
            (right_leading.start, right_leading.end),
            (vec2(216.0, 411.0), vec2(177.0, 427.0))
        );

        let events = game.update(
            1.0 / 60.0,
            3,
            Controls {
                left_flipper: true,
                right_flipper: true,
                ..Controls::default()
            },
        );
        assert_eq!(
            events
                .iter()
                .filter(|event| **event == Event::FlipperMove)
                .count(),
            2
        );
        let left_leading = game.live_wall_segment(66, wall(66));
        let left_trailing = game.live_wall_segment(68, wall(68));
        let right_leading = game.live_wall_segment(81, wall(81));
        let right_trailing = game.live_wall_segment(83, wall(83));
        assert_eq!(
            (left_leading.start, left_leading.end),
            (vec2(98.0, 382.0), vec2(131.0, 369.0))
        );
        assert_eq!(
            (left_trailing.start, left_trailing.end),
            (vec2(137.0, 384.0), vec2(116.0, 405.0))
        );
        assert_eq!(
            game.live_circle_center(67, LEFT_FLIPPER_REST_TIP),
            vec2(133.0, 377.0)
        );
        assert_eq!(
            (right_leading.start, right_leading.end),
            (vec2(197.0, 405.0), vec2(171.0, 378.0))
        );
        assert_eq!(
            (right_trailing.start, right_trailing.end),
            (vec2(183.0, 368.0), vec2(217.0, 383.0))
        );
        assert_eq!(
            game.live_circle_center(82, RIGHT_FLIPPER_REST_TIP),
            vec2(181.0, 376.0)
        );
    }

    #[test]
    fn each_flipper_edge_has_the_recovered_movement_sound() {
        let mut game = Game::new(1);
        let raised = Controls {
            left_flipper: true,
            right_flipper: true,
            ..Controls::default()
        };

        let press_events = game.update(1.0 / 60.0, 3, raised);
        assert_eq!(
            press_events,
            [Event::FlipperMove, Event::FlipperMove],
            "each original move_flipper call starts WAVE 2021"
        );
        assert!(game.update(1.0 / 60.0, 3, raised).is_empty());

        let release_events = game.update(1.0 / 60.0, 3, Controls::default());
        assert_eq!(
            release_events,
            [Event::FlipperMove, Event::FlipperMove],
            "the original also plays the sound while returning"
        );
        assert_eq!(Event::FlipperMove.sound_resource(), 2021);
    }

    #[test]
    fn raising_flipper_matches_the_live_swept_transfer_probe() {
        let mut game = Game::new(1);
        game.ball.in_launcher = false;
        game.ball.position = vec2(125.0, 390.0);
        game.ball.velocity = Vec2::ZERO;
        game.pending_flipper_kicks[0] = true;

        game.apply_flipper_kicks();
        let velocity_after_edge = game.ball.velocity;
        assert!(game.ball.position.distance(vec2(138.182, 355.0)) < 0.002);
        let raw_velocity = MilliVec::from_velocity_per_second(velocity_after_edge);
        assert!((raw_velocity.x - 2_217).abs() <= 2);
        assert!((raw_velocity.y - -5_889).abs() <= 2);
        assert_eq!(game.pending_flipper_kicks, [false, false]);

        game.apply_flipper_kicks();
        assert_eq!(
            game.ball.velocity, velocity_after_edge,
            "holding a raised flipper must not add another impulse"
        );
    }

    #[test]
    fn returning_flipper_moves_and_sounds_without_queueing_a_kick() {
        let mut game = Game::new(1);
        game.flippers.left_raised = true;

        let events = game.update(0.0, 3, Controls::default());

        assert_eq!(events, [Event::FlipperMove]);
        assert_eq!(game.pending_flipper_kicks, [false, false]);
    }

    #[test]
    fn recovered_control_sounds_use_the_original_resource_numbers() {
        assert_eq!(Event::Launch.sound_resource(), 2002);
        assert_eq!(Event::Wheel.sound_resource(), 2011);
        assert_eq!(Event::Nudge.sound_resource(), 2019);
        assert_eq!(Event::Tilt.sound_resource(), 2020);
        assert_eq!(Event::Drain.sound_resource(), 2008);
        assert_eq!(Event::ClawCapture.sound_resource(), 2015);
        assert_eq!(Event::ClawRelease.sound_resource(), 2016);
    }

    #[test]
    fn claw_sprite_rects_follow_the_recovered_four_row_sheet() {
        let source = |frame, bank| {
            Claw {
                active: true,
                frame,
                bank,
                ..Claw::default()
            }
            .sprite_source()
            .map(|rect| (rect.x, rect.y, rect.w, rect.h))
        };

        assert_eq!(
            source(1, ClawSpriteBank::Closing),
            Some((0.0, 0.0, 100.0, 74.0))
        );
        assert_eq!(
            source(9, ClawSpriteBank::Closing),
            Some((800.0, 0.0, 100.0, 74.0))
        );
        assert_eq!(
            source(10, ClawSpriteBank::Closing),
            Some((0.0, 74.0, 100.0, 74.0))
        );
        assert_eq!(
            source(18, ClawSpriteBank::Closing),
            Some((800.0, 74.0, 100.0, 74.0))
        );
        assert_eq!(
            source(1, ClawSpriteBank::Opening),
            Some((0.0, 148.0, 100.0, 74.0))
        );
        assert_eq!(
            source(18, ClawSpriteBank::Opening),
            Some((800.0, 222.0, 100.0, 74.0))
        );
        assert_eq!(Claw::default().sprite_source(), None);
    }

    #[test]
    fn claw_capture_holds_releases_and_returns_in_original_frame_order() {
        let mut game = Game::new(1);
        game.ball.in_launcher = false;
        game.ball.position = CLAW_TRIGGER_CENTER;
        game.ball.velocity = vec2(120.0, -40.0);
        let held_position = game.ball.position;
        let mut events = Vec::new();

        game.begin_claw_capture(6, &mut events);
        assert_eq!(events, [Event::ClawCapture]);
        assert_eq!(game.claw.frame, 10);
        assert_eq!(game.claw.bank, ClawSpriteBank::Closing);
        assert!(game.claw.ball_suspended);
        assert_eq!(game.ball.velocity, Vec2::ZERO);

        game.fixed_update(CLAW_FRAME_SECONDS / 3.0, &mut events);
        assert_eq!(game.ball.position, held_position);
        assert_eq!(game.claw.frame, 10);

        for expected_frame in [9, 8, 7, 6] {
            game.update_claw(CLAW_FRAME_SECONDS, &mut events);
            assert_eq!(game.claw.frame, expected_frame);
            assert!(game.claw.ball_suspended);
        }

        game.update_claw(CLAW_FRAME_SECONDS, &mut events);
        assert_eq!(events.last(), Some(&Event::ClawRelease));
        assert_eq!(game.claw.frame, 6);
        assert_eq!(game.claw.bank, ClawSpriteBank::Opening);
        assert!(!game.claw.ball_suspended);
        assert_eq!(game.ball.position, vec2(270.0, 94.0));
        assert!((game.ball.velocity.x - -50.666_668).abs() < 0.001);
        assert!((game.ball.velocity.y - 76.0).abs() < 0.001);

        for expected_frame in [7, 8, 9, 10] {
            game.update_claw(CLAW_FRAME_SECONDS, &mut events);
            assert_eq!(game.claw.frame, expected_frame);
            assert!(game.claw.active);
        }
        game.update_claw(CLAW_FRAME_SECONDS, &mut events);
        assert_eq!(game.claw.frame, 10);
        assert!(!game.claw.active);
    }

    #[test]
    fn claw_uses_the_original_circular_trigger_not_a_broad_rectangle() {
        let mut game = Game::new(1);
        game.ball.in_launcher = false;
        game.ball.position = CLAW_TRIGGER_CENTER + vec2(CLAW_TRIGGER_RADIUS + 0.1, 0.0);
        game.check_sensor_objects(
            MilliVec::from_position(game.ball.position),
            MilliVec::default(),
            &mut Vec::new(),
        );
        assert!(!game.claw.active);

        game.ball.position = CLAW_TRIGGER_CENTER;
        let mut events = Vec::new();
        game.check_sensor_objects(
            MilliVec::from_position(game.ball.position),
            MilliVec::default(),
            &mut events,
        );
        assert!(game.claw.active);
        assert_eq!(events, [Event::ClawCapture]);
        assert!(CLAW_TERMINAL_FRAMES.contains(&game.claw.target_frame));
    }

    #[test]
    fn top_sensor_uses_the_original_score_and_contact_latch() {
        let mut game = Game::new(1);
        game.ball.in_launcher = false;
        game.ball.position = vec2(205.0, 55.0);
        let mut events = Vec::new();

        game.check_sensor_objects(
            MilliVec::from_position(vec2(205.0, 60.0)),
            MilliVec { x: 0, y: -5_000 },
            &mut events,
        );
        assert_eq!(game.player().score, 500);
        assert_eq!(events, [Event::Target]);
        assert!((game.magnets - 0.3).abs() < f32::EPSILON);

        game.check_sensor_objects(
            MilliVec::from_position(game.ball.position),
            MilliVec::default(),
            &mut events,
        );
        assert_eq!(game.player().score, 500, "contact must score only once");

        game.ball.position = vec2(205.0, 70.0);
        game.check_sensor_objects(
            MilliVec::from_position(game.ball.position),
            MilliVec::default(),
            &mut events,
        );
        game.ball.position = vec2(205.0, 55.0);
        game.check_sensor_objects(
            MilliVec::from_position(vec2(205.0, 60.0)),
            MilliVec { x: 0, y: -5_000 },
            &mut events,
        );
        assert_eq!(game.player().score, 1_000);
    }

    #[test]
    fn claw_release_table_decodes_the_original_thousandth_pixel_coordinates() {
        for (frame, expected) in [
            (1, vec2(258.0, 78.0)),
            (6, vec2(270.0, 94.0)),
            (7, vec2(275.0, 97.0)),
            (18, vec2(325.0, 92.0)),
        ] {
            assert_eq!(claw_release(frame).0, expected);
        }
    }

    #[test]
    fn drain_clears_latched_tilt() {
        let mut game = Game::new(1);
        game.tilted = true;
        game.ball.in_launcher = false;
        game.ball.position = vec2(157.0, 454.0);
        game.ball.velocity = vec2(0.0, 200.0);

        game.update(1.0 / 60.0, 3, Controls::default());

        assert!(!game.tilted);
        assert!(game.ball.in_launcher);
    }

    #[test]
    fn waiting_ball_cannot_be_tilted() {
        let mut game = Game::new(1);

        for _ in 0..12 {
            game.nudge_cooldown = 0.0;
            let events = game.update(
                1.0 / 60.0,
                3,
                Controls {
                    nudge: 1.0,
                    ..Controls::default()
                },
            );
            assert!(!events.contains(&Event::Nudge));
            assert!(!events.contains(&Event::Tilt));
        }

        assert!(!game.tilted);
        assert!(launch_ball(&mut game, 1).contains(&Event::Launch));
    }
}