Commit | Line | Data |
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a6b57e45 TW |
1 | use common::Point2D; |
2 | use core::render::Renderer; | |
3 | use rand::Rng; | |
4 | use sprites::SpriteManager; | |
5 | ||
6 | ////////// LEVEL /////////////////////////////////////////////////////////////// | |
7 | ||
8 | #[derive(Default)] | |
9 | pub struct Level { | |
10 | pub gravity: Point2D<f64>, | |
11 | pub ground: f64, // just to have something | |
12 | pub grid: Grid, | |
13 | iterations: u8, | |
14 | } | |
15 | ||
16 | impl Level { | |
17 | pub fn new(gravity: Point2D<f64>, ground: f64) -> Self { | |
18 | Level { gravity, ground, grid: Grid::generate(10), iterations: 10 } | |
19 | } | |
20 | ||
21 | pub fn regenerate(&mut self) { | |
22 | self.grid = Grid::generate(self.iterations); | |
23 | } | |
24 | ||
25 | pub fn increase_iteration(&mut self) { | |
26 | self.iterations += 1; | |
27 | self.regenerate(); | |
28 | println!("iterate {} time(s)", self.iterations); | |
29 | } | |
30 | ||
31 | pub fn decrease_iteration(&mut self) { | |
32 | self.iterations -= 1; | |
33 | self.regenerate(); | |
34 | println!("iterate {} time(s)", self.iterations); | |
35 | } | |
36 | ||
37 | pub fn render(&mut self, renderer: &mut Renderer, _sprites: &SpriteManager) { | |
38 | let w = renderer.viewport().0 as i32; | |
39 | ||
40 | renderer.canvas().set_draw_color((64, 64, 64)); | |
41 | let size = self.grid.cell_size; | |
42 | for x in 0..self.grid.width { | |
43 | for y in 0..self.grid.height { | |
44 | if self.grid.cells[x][y] { | |
45 | renderer.canvas().fill_rect(sdl2::rect::Rect::new(x as i32 * size as i32, y as i32 * size as i32, size as u32, size as u32)).unwrap(); | |
46 | } | |
47 | } | |
48 | } | |
49 | ||
50 | for i in 1..11 { | |
51 | let y = (i * i - 1) as i32 + self.ground as i32; | |
52 | renderer.canvas().set_draw_color((255 - i * 20, 255 - i * 20, 0)); | |
53 | renderer.canvas().draw_line((0, y), (w, y)).unwrap(); | |
54 | } | |
55 | } | |
56 | } | |
57 | ||
58 | ////////// GRID //////////////////////////////////////////////////////////////// | |
59 | ||
60 | #[derive(Default)] | |
61 | pub struct Grid { | |
62 | pub width: usize, | |
63 | pub height: usize, | |
64 | pub cell_size: usize, | |
65 | pub cells: Vec<Vec<bool>>, | |
66 | } | |
67 | ||
68 | impl Grid { | |
69 | fn generate(iterations: u8) -> Grid { | |
60276654 TW |
70 | let cell_size = 20; |
71 | let (width, height) = (2560 / cell_size, 1440 / cell_size); | |
72 | ||
73 | let mut grid = Grid { | |
74 | cell_size, | |
75 | width, | |
76 | height, | |
77 | cells: vec!(vec!(true; height); width), | |
78 | }; | |
79 | ||
80 | // start with some noise | |
81 | // grid.simplex_noise(); | |
82 | grid.random_noise(); | |
a6b57e45 | 83 | |
60276654 TW |
84 | // smooth with cellular automata |
85 | grid.smooth(iterations); | |
86 | // grid.smooth_until_equilibrium(); | |
87 | ||
88 | // increase resolution | |
89 | for _i in 0..1 { | |
90 | grid = grid.subdivide(); | |
91 | grid.smooth(iterations); | |
92 | } | |
93 | ||
94 | grid | |
95 | } | |
96 | ||
97 | #[allow(dead_code)] | |
98 | fn simplex_noise(&mut self) { | |
99 | use noise::{NoiseFn, OpenSimplex, Seedable}; | |
100 | let noise = OpenSimplex::new().set_seed(std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_secs() as u32); | |
101 | self.set_each(|x, y| noise.get([x as f64 / 12.0, y as f64 / 12.0]) > 0.055, 1); | |
102 | } | |
103 | ||
104 | #[allow(dead_code)] | |
105 | fn random_noise(&mut self) { | |
a6b57e45 | 106 | let mut rng = rand::thread_rng(); |
60276654 TW |
107 | self.set_each(|_x, _y| rng.gen_range(0, 100) > 55, 1); |
108 | } | |
a6b57e45 | 109 | |
60276654 TW |
110 | #[allow(dead_code)] |
111 | fn smooth(&mut self, iterations: u8) { | |
112 | let distance = 1; | |
113 | for _i in 0..iterations { | |
114 | let mut next = vec!(vec!(true; self.height); self.width); | |
115 | for x in distance..(self.width - distance) { | |
116 | for y in distance..(self.height - distance) { | |
117 | match Grid::neighbours(&self.cells, x, y, distance) { | |
118 | n if n < 4 => next[x][y] = false, | |
119 | n if n > 4 => next[x][y] = true, | |
120 | _ => next[x][y] = self.cells[x][y] | |
121 | } | |
122 | } | |
123 | } | |
124 | if self.cells == next { | |
125 | break; // exit early | |
126 | } else { | |
127 | self.cells = next; | |
a6b57e45 TW |
128 | } |
129 | } | |
60276654 | 130 | } |
a6b57e45 | 131 | |
60276654 TW |
132 | #[allow(dead_code)] |
133 | fn smooth_until_equilibrium(&mut self) { | |
134 | let distance = 1; | |
135 | let mut count = 0; | |
136 | loop { | |
137 | count += 1; | |
138 | let mut next = vec!(vec!(true; self.height); self.width); | |
139 | for x in distance..(self.width - distance) { | |
140 | for y in distance..(self.height - distance) { | |
141 | match Grid::neighbours(&self.cells, x, y, distance) { | |
a6b57e45 TW |
142 | n if n < 4 => next[x][y] = false, |
143 | n if n > 4 => next[x][y] = true, | |
60276654 | 144 | _ => next[x][y] = self.cells[x][y] |
a6b57e45 TW |
145 | }; |
146 | } | |
147 | } | |
60276654 | 148 | if self.cells == next { |
a6b57e45 TW |
149 | break; |
150 | } else { | |
60276654 | 151 | self.cells = next; |
a6b57e45 TW |
152 | } |
153 | } | |
60276654 | 154 | println!("{} iterations needed", count); |
a6b57e45 TW |
155 | } |
156 | ||
60276654 | 157 | fn neighbours(grid: &Vec<Vec<bool>>, px: usize, py: usize, distance: usize) -> u8 { |
a6b57e45 | 158 | let mut count = 0; |
60276654 TW |
159 | for x in (px - distance)..=(px + distance) { |
160 | for y in (py - distance)..=(py + distance) { | |
a6b57e45 TW |
161 | if !(x == px && y == py) && grid[x][y] { |
162 | count += 1; | |
163 | } | |
164 | } | |
165 | } | |
166 | count | |
167 | } | |
60276654 TW |
168 | |
169 | fn set_each<F: FnMut(usize, usize) -> bool>(&mut self, mut func: F, walls: usize) { | |
170 | for x in walls..(self.width - walls) { | |
171 | for y in walls..(self.height - walls) { | |
172 | self.cells[x][y] = func(x, y); | |
173 | } | |
174 | } | |
175 | } | |
176 | ||
177 | fn subdivide(&mut self) -> Grid { | |
178 | let (width, height) = (self.width * 2, self.height * 2); | |
179 | let mut cells = vec!(vec!(true; height); width); | |
180 | for x in 1..(width - 1) { | |
181 | for y in 1..(height - 1) { | |
182 | cells[x][y] = self.cells[x / 2][y / 2]; | |
183 | } | |
184 | } | |
185 | Grid { | |
186 | cell_size: self.cell_size / 2, | |
187 | width, | |
188 | height, | |
189 | cells | |
190 | } | |
191 | } | |
a6b57e45 | 192 | } |