1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
use ggez::filesystem::File;
use ggez::graphics::{spritebatch::SpriteBatch, DrawParam};
use ggez::nalgebra::{Point2, Vector2};
use std::f32::consts::PI;
use xml::reader::XmlEvent::Characters;
use crate::constants;
use crate::tileset::Tileset;
use crate::xmlelements::XMLElements;
pub struct Map {
pub width: usize,
pub height: usize,
pub layers: Vec<Layer>,
}
impl Map {
pub fn new(file: File) -> Map {
let elements = XMLElements::new(file);
let width = elements.get_element_attribute("map", "width").unwrap();
let height = elements.get_element_attribute("map", "height").unwrap();
let layers = elements
.events
.iter()
.filter_map(|e| {
if let Characters(text) = e {
Some(Layer::new(text.to_string()))
} else {
None
}
})
.collect();
Map {
layers,
width,
height,
}
}
pub fn draw(&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 tile_id = layer.data[x + (y * self.height)];
let (tile_id, rotate) = self.decode(tile_id as u32);
let offset = (constants::TILE_WIDTH / 2.0) * constants::TILE_SCALE;
let draw_param = DrawParam::default()
.src(tileset.tiles[tile_id as usize])
.rotation(rotate)
.offset(Point2::new(0.5, 0.5))
.dest(Point2::new(
(constants::TILE_WIDTH * constants::TILE_SCALE * x as f32) + offset,
(constants::TILE_HEIGHT * constants::TILE_SCALE * y as f32) + offset,
))
.scale(Vector2::new(constants::TILE_SCALE, constants::TILE_SCALE));
spritebatch.add(draw_param);
}
}
}
}
pub fn get_dimensions(&self) -> (f32, f32) {
(
(constants::TILE_WIDTH * constants::TILE_SCALE) * self.width as f32,
(constants::TILE_HEIGHT * constants::TILE_SCALE) * self.height as f32,
)
}
fn decode(&self, tile_id: u32) -> (u32, f32) {
//let flip_d = (tile_id & constants::FLIP_DIAGONALLY_FLAG) == constants::FLIP_DIAGONALLY_FLAG;
let flip_h =
(tile_id & constants::FLIP_HORIZONTALLY_FLAG) == constants::FLIP_HORIZONTALLY_FLAG;
let flip_v = (tile_id & constants::FLIP_VERTICALLY_FLAG) == constants::FLIP_VERTICALLY_FLAG;
let new_tile_id = if flip_h | flip_v {
tile_id & !constants::ALL_FLIP_FLAGS
} else {
tile_id
};
let rotate = match (flip_h, flip_v) {
(true, false) => self.convert_angle_to_rad(90.0),
(true, true) => self.convert_angle_to_rad(180.0),
(false, true) => self.convert_angle_to_rad(270.0),
(false, false) => 0.0,
};
(new_tile_id, rotate)
}
fn convert_angle_to_rad(&self, angle: f32) -> f32 {
angle * (PI / 180.0)
}
}
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(),
}
}
}
|
