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|
pub mod command;
pub mod geometry;
pub mod settings;
use self::command::{BuildingType, Command};
use self::geometry::Point;
use self::settings::GameSettings;
use std::ops::Fn;
use std::cmp;
#[derive(Debug, Clone)]
pub struct GameState {
pub status: GameStatus,
pub player: Player,
pub opponent: Player,
pub player_buildings: Vec<Building>,
pub opponent_buildings: Vec<Building>,
pub player_missiles: Vec<Missile>,
pub opponent_missiles: Vec<Missile>
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum GameStatus {
Continue,
PlayerWon,
OpponentWon,
Draw,
InvalidMove
}
impl GameStatus {
fn is_complete(&self) -> bool {
*self != GameStatus::Continue
}
}
#[derive(Debug, Clone)]
pub struct Player {
pub energy: u16,
pub health: u16
}
#[derive(Debug, Clone)]
pub struct Building {
pub pos: Point,
pub health: u16,
pub construction_time_left: u8,
pub weapon_damage: u16,
pub weapon_speed: u8,
pub weapon_cooldown_time_left: u8,
pub weapon_cooldown_period: u8,
pub energy_generated_per_turn: u16
}
impl Building {
fn new(pos: Point, building: BuildingType) -> Building {
match building {
BuildingType::Defense => Building {
pos: pos,
health: 20,
construction_time_left: 3,
weapon_damage: 0,
weapon_speed: 0,
weapon_cooldown_time_left: 0,
weapon_cooldown_period: 0,
energy_generated_per_turn: 0
},
BuildingType::Attack => Building {
pos: pos,
health: 5,
construction_time_left: 1,
weapon_damage: 5,
weapon_speed: 1,
weapon_cooldown_time_left: 0,
weapon_cooldown_period: 3,
energy_generated_per_turn: 0
},
BuildingType::Energy => Building {
pos: pos,
health: 5,
construction_time_left: 1,
weapon_damage: 0,
weapon_speed: 0,
weapon_cooldown_time_left: 0,
weapon_cooldown_period: 0,
energy_generated_per_turn: 3
}
}
}
fn is_constructed(&self) -> bool {
self.construction_time_left == 0
}
fn is_shooty(&self) -> bool {
self.is_constructed() && self.weapon_damage > 0
}
}
#[derive(Debug, Clone)]
pub struct Missile {
pub pos: Point,
pub damage: u16,
pub speed: u8,
}
impl GameState {
pub fn simulate(&self, settings: &GameSettings, player_command: Command, opponent_command: Command) -> GameState {
if self.status.is_complete() {
return self.clone();
}
let mut state = self.clone();
let player_valid = GameState::perform_command(&mut state.player_buildings, player_command, &settings.size);
let opponent_valid = GameState::perform_command(&mut state.opponent_buildings, opponent_command, &settings.size);
if !player_valid || !opponent_valid {
state.status = GameStatus::InvalidMove;
return state;
}
GameState::update_construction(&mut state.player_buildings);
GameState::update_construction(&mut state.opponent_buildings);
GameState::add_missiles(&mut state.player_buildings, &mut state.player_missiles);
GameState::add_missiles(&mut state.opponent_buildings, &mut state.opponent_missiles);
GameState::move_missiles(&mut state.player_missiles, |p| p.move_right(&settings.size),
&mut state.opponent_buildings, &mut state.opponent);
GameState::move_missiles(&mut state.opponent_missiles, |p| p.move_left(),
&mut state.player_buildings, &mut state.player);
GameState::add_energy(&mut state.player, settings, &state.player_buildings);
GameState::add_energy(&mut state.opponent, settings, &state.opponent_buildings);
GameState::update_status(&mut state);
state
}
fn perform_command(buildings: &mut Vec<Building>, command: Command, size: &Point) -> bool {
match command {
Command::Nothing => { true },
Command::Build(p, b) => {
let occupied = buildings.iter().any(|b| b.pos == p);
let in_range = p.x < size.x && p.y < size.y;
buildings.push(Building::new(p, b));
!occupied && in_range
},
}
}
fn update_construction(buildings: &mut Vec<Building>) {
for building in buildings.iter_mut().filter(|b| !b.is_constructed()) {
building.construction_time_left -= 1;
}
}
fn add_missiles(buildings: &mut Vec<Building>, missiles: &mut Vec<Missile>) {
for building in buildings.iter_mut().filter(|b| b.is_shooty()) {
if building.weapon_cooldown_time_left > 0 {
building.weapon_cooldown_time_left -= 1;
} else {
missiles.push(Missile {
pos: building.pos,
speed: building.weapon_speed,
damage: building.weapon_damage,
});
building.weapon_cooldown_time_left = building.weapon_cooldown_period;
}
}
}
fn move_missiles<F>(missiles: &mut Vec<Missile>, move_fn: F, opponent_buildings: &mut Vec<Building>, opponent: &mut Player)
where F: Fn(Point) -> Option<Point> {
for missile in missiles.iter_mut() {
for _ in 0..missile.speed {
match move_fn(missile.pos) {
None => {
let damage = cmp::min(missile.damage, opponent.health);
opponent.health -= damage;
missile.speed = 0;
},
Some(point) => {
missile.pos = point;
for hit in opponent_buildings.iter_mut().filter(|b| b.is_constructed() && b.pos == point && b.health > 0) {
let damage = cmp::min(missile.damage, hit.health);
hit.health -= damage;
missile.speed = 0;
}
}
}
if missile.speed == 0 {
break;
}
}
}
missiles.retain(|m| m.speed > 0);
opponent_buildings.retain(|b| b.health > 0);
}
fn add_energy(player: &mut Player, settings: &GameSettings, buildings: &Vec<Building>) {
player.energy += settings.energy_income;
player.energy += buildings.iter().map(|b| b.energy_generated_per_turn).sum::<u16>();
}
fn update_status(state: &mut GameState) {
let player_dead = state.player.health == 0;
let opponent_dead = state.player.health == 0;
state.status = match (player_dead, opponent_dead) {
(true, true) => GameStatus::Draw,
(true, false) => GameStatus::PlayerWon,
(false, true) => GameStatus::OpponentWon,
(false, false) => GameStatus::Continue,
};
}
}
|
