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use ggez::filesystem::File;
use ggez::graphics::{spritebatch::SpriteBatch, DrawParam};
use ggez::nalgebra::{Point2, Vector2};
use std::io::BufReader;
use xml::reader::{EventReader, XmlEvent};
use crate::constants;
use crate::tileset::Tileset;
pub struct Map {
pub width: usize,
pub height: usize,
pub layers: Vec<Layer>,
}
impl Map {
pub fn new(file: File) -> Map {
let mut width = None;
let mut height = None;
let mut layers = Vec::new();
for e in EventReader::new(BufReader::new(file)) {
if let Ok(XmlEvent::StartElement {
name, attributes, ..
}) = e
{
if name.local_name == "map" {
for attribute in attributes {
match attribute.name.local_name.as_str() {
"width" => width = Some(attribute.value.parse::<usize>().unwrap()),
"height" => height = Some(attribute.value.parse::<usize>().unwrap()),
_ => (),
}
}
}
} else if let Ok(XmlEvent::Characters(text)) = e {
layers.push(Layer::new(text));
}
}
Map {
layers,
width: width.unwrap(),
height: height.unwrap(),
}
}
pub fn draw(&mut self, spritebatch: &mut SpriteBatch, tileset: &Tileset) {
for layer in self.layers.iter() {
for x in 0..self.width {
for y in 0..self.height {
let draw_param = DrawParam::default()
.src(tileset.tiles[layer.data[x + (y * self.height)]])
.dest(Point2::new(
tileset.tile_width * constants::TILE_SCALE * x as f32,
tileset.tile_height * constants::TILE_SCALE * y as f32,
))
.scale(Vector2::new(constants::TILE_SCALE, constants::TILE_SCALE));
spritebatch.add(draw_param);
}
}
}
}
}
pub struct Layer {
pub data: Vec<usize>,
}
impl Layer {
pub fn new(text: String) -> Layer {
Layer {
data: text
.replace("\n", "")
.split(',')
.map(|s| s.parse().unwrap())
.collect(),
}
}
}
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