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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
#![deny(missing_docs)]
extern crate ggez;
extern crate nalgebra;
use ggez::graphics::{self, spritebatch::SpriteBatch, Color, DrawParam, Image, Rect};
use nalgebra::{Point2, Vector2};
use std::{collections::HashMap, hash::Hash};
pub struct TileSet<Key: Hash + Eq> {
tile_size: Vector2<i32>,
tile_cache: HashMap<Key, Point2<i32>>,
sheet_dimensions: Vector2<i32>,
spritebatch: SpriteBatch,
}
impl<Key: Hash + Eq> TileSet<Key> {
pub fn new<S: Into<Vector2<i32>>>(sheet: Image, tile_size: S) -> Self {
let tile_size = tile_size.into();
let sheet_dimensions = Vector2::new(
sheet.width() as i32 / tile_size.x,
sheet.height() as i32 / tile_size.y);
Self {
tile_size,
tile_cache: HashMap::new(),
sheet_dimensions,
spritebatch: SpriteBatch::new(sheet),
}
}
pub fn register_tile<I: Into<Point2<i32>>>(
&mut self,
key: Key,
index: I,
) -> Result<(), TileSetError> {
let index = index.into();
if index.x > self.sheet_dimensions.x || index.y > self.sheet_dimensions.y {
return Err(TileSetError::OutOfRange);
}
self.tile_cache.insert(key, index);
Ok(())
}
pub fn queue_tile<P: Into<Point2<i32>>, TP: Into<TileParams>>(
&mut self,
key: Key,
draw_location: P,
options: Option<TP>,
) -> Result<(), TileSetError> {
let tile = self.tile_cache.get(&key).ok_or(TileSetError::TileNotFound)?;
let options = options.map(|tp| tp.into()).unwrap_or(TileParams {
color: None,
scale: None,
});
let coords = draw_location.into();
let normal_x = 1.0 / self.sheet_dimensions.x as f32;
let normal_y = 1.0 / self.sheet_dimensions.y as f32;
let d = DrawParam::default().dest(nalgebra::Point2::new(
(coords.x * self.tile_size.x) as f32,
(coords.y * self.tile_size.y) as f32,
)).src(Rect::new(
normal_x * tile.x as f32,
normal_y * tile.y as f32,
normal_x,
normal_y,
)).color(options.color.unwrap_or(graphics::WHITE)).scale(options.scale.unwrap_or(Vector2::new(1.0, 1.0)));
self.spritebatch.add(d);
Ok(())
}
pub fn clear_queue(&mut self) {
self.spritebatch.clear();
}
pub fn draw(&self, ctx: &mut ggez::Context) -> ggez::GameResult {
graphics::draw(ctx, &self.spritebatch, DrawParam::default())
}
}
pub struct TileParams {
pub color: Option<Color>,
pub scale: Option<Vector2<f32>>,
}
impl From<(Option<Color>, Option<Vector2<f32>>)> for TileParams {
fn from((color, scale): (Option<Color>, Option<Vector2<f32>>)) -> TileParams {
TileParams { color, scale }
}
}
impl From<(Option<Color>, Vector2<f32>)> for TileParams {
fn from((color, scale): (Option<Color>, Vector2<f32>)) -> TileParams {
TileParams {
color,
scale: Some(scale),
}
}
}
impl From<(Color, Option<Vector2<f32>>)> for TileParams {
fn from((color, scale): (Color, Option<Vector2<f32>>)) -> TileParams {
TileParams {
color: Some(color),
scale,
}
}
}
impl From<(Color, Vector2<f32>)> for TileParams {
fn from((color, scale): (Color, Vector2<f32>)) -> TileParams {
TileParams {
color: Some(color),
scale: Some(scale),
}
}
}
#[derive(Debug, Clone, Copy)]
pub enum TileSetError {
OutOfRange,
TileNotFound,
}
impl std::fmt::Display for TileSetError {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(
f,
"{}",
match self {
TileSetError::OutOfRange => "Position out of range of tilesheet dimensions",
TileSetError::TileNotFound => "Tile not found during lookup",
}
)
}
}
impl std::error::Error for TileSetError {}