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use crate::constants;
use bevy::prelude::*;
use rand::{
distributions::{Distribution, Standard},
Rng,
};
#[derive(Debug, PartialEq, Clone, Copy)]
pub enum Occupant {
None,
Green,
Yellow,
Red,
Diamond,
Explosion,
}
impl Default for Occupant {
fn default() -> Occupant {
Occupant::None
}
}
impl Occupant {
pub fn to_index(&self) -> u32 {
match self {
Occupant::Green => 0,
Occupant::Yellow => 1,
Occupant::Red => 2,
Occupant::Diamond => 3,
Occupant::Explosion => 4,
Occupant::None => 13,
}
}
}
impl Distribution<Occupant> for Standard {
fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> Occupant {
match rng.gen_range(0..=3) {
0 => Occupant::Green,
1 => Occupant::Yellow,
2 => Occupant::Diamond,
3 => Occupant::Red,
_ => Occupant::None,
}
}
}
#[derive(Debug, Clone, Default, Copy)]
pub struct Cell {
pub x: usize,
pub y: usize,
pub occupant: Occupant,
pub selected: bool,
pub hovered: bool,
}
impl Cell {
pub fn new(x: usize, y: usize) -> Cell {
Cell {
x,
y,
occupant: Occupant::None,
selected: false,
hovered: false,
}
}
}
pub fn insert(mut cell_query: Query<(&mut Cell, &mut TextureAtlasSprite)>) {
for (mut cell, mut sprite) in cell_query.iter_mut() {
if cell.occupant == Occupant::None && cell.y == constants::ROWS - 1 {
cell.occupant = rand::random();
sprite.index = cell.occupant.to_index();
}
}
}
pub fn explosion_animation(
time: Res<Time>,
commands: &mut Commands,
mut cell_query: Query<(
Entity,
&mut Cell,
&mut TextureAtlasSprite,
Option<&mut Timer>,
)>,
) {
for (entity, mut cell, mut sprite, timer) in cell_query.iter_mut() {
if cell.occupant == Occupant::Explosion {
if let Some(mut timer) = timer {
timer.tick(time.delta_seconds());
if timer.finished() {
if sprite.index < 7 && sprite.index >= 4 {
sprite.index += 1;
} else {
cell.occupant = Occupant::None;
sprite.index = cell.occupant.to_index();
commands.remove_one::<Timer>(entity);
}
}
} else {
commands.insert(entity, (Timer::from_seconds(0.1, true),));
}
}
}
}
pub fn check(mut cell_query: Query<(&mut Cell, &mut TextureAtlasSprite)>) {
let mut cells = [[Cell::default(); constants::COLUMNS]; constants::ROWS];
for (cell, _) in cell_query.iter_mut() {
cells[cell.x][cell.y] = *cell;
}
let mut last = Occupant::None;
let mut connected = Vec::new();
for (i, _) in cells.iter().enumerate() {
let mut c = Vec::new();
for j in 0..constants::ROWS {
if cells[i][j].occupant == last && last != Occupant::None {
c.push((i, j));
c.push((i, j - 1));
} else {
connected.push(c.clone());
c.clear();
}
last = cells[i][j].occupant;
}
connected.push(c);
last = Occupant::None;
}
for c in connected.iter() {
if c.len() > 4 {
for (i, j) in c.iter() {
for (mut cell, mut sprite) in cell_query.iter_mut() {
if &cell.x == i && &cell.y == j && cell.occupant != Occupant::Explosion {
cell.occupant = Occupant::Explosion;
sprite.index = cell.occupant.to_index();
}
}
}
}
}
connected.clear();
for (i, row) in cells.iter().enumerate() {
let mut c = Vec::new();
for (j, _) in row.iter().enumerate() {
if cells[j][i].occupant == last && last != Occupant::None {
c.push((j, i));
c.push((j - 1, i));
} else {
connected.push(c.clone());
c.clear();
}
last = cells[j][i].occupant;
}
connected.push(c);
last = Occupant::None;
}
for c in connected.iter() {
if c.len() > 4 {
for (i, j) in c.iter() {
for (mut cell, mut sprite) in cell_query.iter_mut() {
if &cell.x == i && &cell.y == j && cell.occupant != Occupant::Explosion {
cell.occupant = Occupant::Explosion;
sprite.index = cell.occupant.to_index();
}
}
}
}
}
}
pub fn falling(mut cell_query: Query<(&mut Cell, &mut TextureAtlasSprite)>) {
let mut have_gems = Vec::new();
for (cell, _sprite) in cell_query.iter_mut() {
if cell.occupant != Occupant::None {
have_gems.push(*cell);
}
}
let mut moved_gems = Vec::new();
for (mut cell, mut sprite) in cell_query.iter_mut() {
if cell.occupant == Occupant::None {
if let Some(c) = have_gems
.iter()
.find(|&c| (c.x, c.y) == (cell.x, cell.y + 1))
{
cell.occupant = c.occupant;
sprite.index = cell.occupant.to_index();
moved_gems.push(c);
}
}
}
for (mut cell, mut sprite) in cell_query.iter_mut() {
if moved_gems.iter().any(|c| (c.x, c.y) == (cell.x, cell.y)) {
cell.occupant = Occupant::None;
sprite.index = cell.occupant.to_index();
}
}
}
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