gistfile1.rs

use std::iter;

static MAP_SIZE: uint = 10;
static TILE_SIZE: f32 = 10.;

pub struct Map {
    tiles: [[u8,..MAP_SIZE],..MAP_SIZE],
    view: Vec<(f32,f32,u8)>,
    view_y: uint, 
    view_x: uint, 
    view_height: uint, 
    view_width: uint
}

impl Map {
    fn new() -> Map {
        Map {
            tiles: [[0,..MAP_SIZE],..MAP_SIZE],
            view: Vec::new(),
            view_y: 0, 
            view_x: 0, 
            view_height: 0, 
            view_width: 0
        }
    }
    fn set_view(&mut self, y: uint, x: uint, height: uint, width: uint) {
        self.view_y = y;
        self.view_x = x;
        self.view_height = height;
        self.view_width = width;
    }
    fn update_view(&mut self) {
        self.view = self.tiles
            .iter()
            .skip(self.view_y)
            .take(self.view_height)
            .enumerate()
            .flat_map(|(y, row)| row
                .iter()
                .skip(self.view_x)
                .take(self.view_width)
                .zip(iter::Repeat::new(y))
                .enumerate()
                .map(|(x, (tile, y))| (x as f32 * TILE_SIZE, y as f32 * TILE_SIZE, *tile)))
            .collect()
    }

}