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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along
with this program. If not, see https://www.gnu.org/licenses/.
*/
use rand::Rng;
use std::vec;
pub struct Config {
pub height: u16,
pub width: u16,
pub frames: u16,
pub out_file: String,
}
impl Config {
pub fn build(mut args: impl Iterator<Item = String>) -> Result<Self, &'static str> {
args.next();
let width: u16 = match args.next() {
Some(arg) => match arg.parse() {
Ok(num) => num,
Err(_) => return Err("Width is not a number"),
},
None => return Err("Didn't get a width"),
};
let height: u16 = match args.next() {
Some(arg) => match arg.parse() {
Ok(num) => num,
Err(_) => return Err("Height is not a number"),
},
None => return Err("Didn't get a height"),
};
let frames: u16 = match args.next() {
Some(arg) => match arg.parse() {
Ok(num) => num,
Err(_) => return Err("Frames is not a number"),
},
None => return Err("Didn't get a frame count"),
};
let out_file = match args.next() {
Some(arg) => arg,
None => return Err("Didn't get an output file"),
};
Ok(Config {
height,
width,
frames,
out_file,
})
}
}
#[derive(Clone)]
struct PointData {
min_dist: f64,
closest_point: Point,
}
impl PointData {
fn get_point_data(gif: &Gif, p: Point) -> Self {
let mut pd = PointData {
min_dist: gif.cross_distance,
closest_point: Point { x: 0, y: 0 },
};
for point in &gif.points {
let d = distance(&p, point);
if d < pd.min_dist {
pd.min_dist = d;
pd.closest_point = point.clone();
}
}
pd
}
}
pub struct Gif {
pub height: u16,
pub width: u16,
pub frames: u16,
pub pixels: Vec<u8>,
point_data: Vec<PointData>,
cross_distance: f64,
points: Vec<Point>,
}
impl Gif {
pub fn create_from_config(config: &Config, num_cells: usize) -> Self {
Gif {
height: config.height,
width: config.width,
frames: config.frames,
pixels: vec![0; config.height as usize * config.width as usize * 3],
point_data: vec![
PointData {
min_dist: 0.0,
closest_point: Point { x: 0, y: 0 }
};
config.height as usize * config.width as usize
],
cross_distance: distance(
&Point { x: 0, y: 0 },
&Point {
x: config.width - 1,
y: config.height - 1,
},
),
points: generate_points(config.width, config.height, num_cells),
}
}
}
#[derive(Clone)]
struct Point {
pub x: u16,
pub y: u16,
}
pub fn fill_canvas(gif: &mut Gif) {
generate_noise(gif);
}
fn set_pixel(gif: &mut Gif, r: u8, g: u8, b: u8, x: u16, y: u16) {
gif.pixels[3 * (gif.width as usize * y as usize + x as usize)] = r;
gif.pixels[3 * (gif.width as usize * y as usize + x as usize) + 1] = g;
gif.pixels[3 * (gif.width as usize * y as usize + x as usize) + 2] = b;
}
fn generate_noise(gif: &mut Gif) {
let mut max_dist = 0.0;
// Get distance and nearest point for each point on the canvas
for y in 0..gif.height {
for x in 0..gif.width {
let index = y as usize * gif.width as usize + x as usize;
gif.point_data[index] = PointData::get_point_data(gif, Point { x, y });
max_dist = f64::max(max_dist, gif.point_data[index].min_dist);
}
}
// normalize distances to [0,1]
for y in 0..gif.height {
for x in 0..gif.width {
let index = y as usize * gif.width as usize + x as usize;
gif.point_data[index].min_dist /= max_dist;
}
}
for y in 0..gif.height {
for x in 0..gif.width {
let index = y as usize * gif.width as usize + x as usize;
let val = 0xFF - (0xFF as f64 * gif.point_data[index].min_dist) as u8;
set_pixel(gif, val, val, val, x, y)
}
}
}
fn generate_points(width: u16, height: u16, num_cells: usize) -> Vec<Point> {
let mut points = vec![Point { x: 0, y: 0 }; num_cells];
for p in &mut points {
p.x = rand::thread_rng().gen_range(0..width);
p.y = rand::thread_rng().gen_range(0..height);
}
points
}
fn distance(p1: &Point, p2: &Point) -> f64 {
let x_dist: f64 = p2.x as f64 - p1.x as f64;
let y_dist: f64 = p2.y as f64 - p1.y as f64;
(x_dist * x_dist + y_dist * y_dist).sqrt()
}
|
