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use ggez;
use ggez::event;
use ggez::graphics::{
self, spritebatch::SpriteBatch, DrawParam, FilterMode, Image, Rect, WrapMode,
};
use ggez::nalgebra::{Point2, Vector2};
use rand::{
distributions::{Distribution, Standard},
Rng,
};
pub const TILE_SCALE: f32 = 3.0;
pub const TILE_HEIGHT: f32 = 16.0;
pub const TILE_WIDTH: f32 = 16.0;
enum Occupant {
None,
Green,
Yellow,
Diamond,
Red,
}
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,
}
}
}
struct Cell {
occupant: Occupant,
position: Point2<f32>,
}
impl Cell {
pub fn new(position: Point2<f32>) -> Cell {
Cell {
occupant: rand::random(),
position: position,
}
}
pub fn draw(&self, spritebatch: &mut SpriteBatch) {
let source = match self.occupant {
Occupant::None => None,
Occupant::Green => Some(Rect::new(0.0, 0.0, 0.25, 1.0)),
Occupant::Yellow => Some(Rect::new(0.25, 0.0, 0.25, 1.0)),
Occupant::Diamond => Some(Rect::new(0.50, 0.0, 0.25, 1.0)),
Occupant::Red => Some(Rect::new(0.75, 0.0, 0.25, 1.0)),
};
if let Some(source) = source {
spritebatch.add(
DrawParam::default()
.src(source)
.dest(self.position)
.scale(Vector2::new(TILE_SCALE, TILE_SCALE)),
);
}
}
}
struct Game {
spritebatch: SpriteBatch,
grid: Vec<Vec<Cell>>,
}
impl Game {
fn new(context: &mut ggez::Context) -> ggez::GameResult<Game> {
let mut image = Image::new(context, "/gem.png")?;
image.set_filter(FilterMode::Nearest);
image.set_wrap(WrapMode::Mirror, WrapMode::Mirror);
let mut grid = Vec::new();
let mut y = 0.0;
for _ in 0..8 {
let mut column = Vec::new();
column.push(Cell::new(Point2::new(0.0, y)));
column.push(Cell::new(Point2::new(TILE_WIDTH * TILE_SCALE, y)));
column.push(Cell::new(Point2::new(2.0 * TILE_WIDTH * TILE_SCALE, y)));
column.push(Cell::new(Point2::new(3.0 * TILE_WIDTH * TILE_SCALE, y)));
column.push(Cell::new(Point2::new(4.0 * TILE_WIDTH * TILE_SCALE, y)));
column.push(Cell::new(Point2::new(5.0 * TILE_WIDTH * TILE_SCALE, y)));
column.push(Cell::new(Point2::new(6.0 * TILE_WIDTH * TILE_SCALE, y)));
column.push(Cell::new(Point2::new(7.0 * TILE_WIDTH * TILE_SCALE, y)));
y += TILE_HEIGHT * TILE_SCALE;
grid.push(column);
}
Ok(Game {
grid: grid,
spritebatch: SpriteBatch::new(image),
})
}
}
impl event::EventHandler for Game {
fn update(&mut self, _context: &mut ggez::Context) -> ggez::GameResult {
Ok(())
}
fn draw(&mut self, context: &mut ggez::Context) -> ggez::GameResult {
graphics::clear(context, [0.1, 0.2, 0.3, 1.0].into());
for row in self.grid.iter() {
for cell in row.iter() {
cell.draw(&mut self.spritebatch)
}
}
graphics::draw(context, &self.spritebatch, DrawParam::default())?;
self.spritebatch.clear();
graphics::present(context)?;
Ok(())
}
}
pub fn main() -> ggez::GameResult {
let cb = ggez::ContextBuilder::new("super_simple", "ggez");
let (context, event_loop) = &mut cb.add_resource_path("./resources").build()?;
let game = &mut Game::new(context)?;
event::run(context, event_loop, game)
}
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