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pixelfoo
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Juergen Stuber 4 years ago
commit 759c9c4f8a
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3
.gitignore vendored
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/target
**/*.rs.bk
*~

8
Cargo.toml
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[package]
name = "pixelfoo"
version = "0.1.0"
authors = ["juergen <juergen@chaospott.de>"]
edition = "2018"
[dependencies]
rand = "0.6.0"

12
README.txt
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bimood - color cycling mood lamp with two complementary colors
parameter is the seconds for one cycle through the colors
predprey - grass-prey-predator simulation
parameter is number of actions per 40ms frame
maze - draws a maze
parameter is number of actions per 40ms frame
Compile with "cargo build --release".
The binary executables are in the "target/release" subdirectory.

141
src/bin/bimood/main.rs
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use std::env::args;
use std::io::stdout;
use std::io::Write;
use std::iter::repeat;
use std::thread::sleep;
use std::time::Duration;
#[derive(Clone, Copy, Debug)]
struct Color(u8, u8, u8);
impl Color {
fn black() -> Color {
Color(0, 0, 0)
}
fn white() -> Color {
Color(255, 255, 255)
}
fn gray50() -> Color {
Color(128, 128, 128)
}
fn red() -> Color {
Color(255, 0, 0)
}
fn green() -> Color {
Color(0, 255, 0)
}
fn blue() -> Color {
Color(0, 0, 255)
}
fn yellow() -> Color {
Color(255, 255, 0)
}
fn cyan() -> Color {
Color(0, 255, 255)
}
fn magenta() -> Color {
Color(255, 0, 255)
}
fn complement(&self) -> Color {
Color(255 - self.0, 255 - self.1, 255 - self.2)
}
}
fn interpolate_u8(b0: u8, b1: u8, a: f64) -> u8 {
let b0 = b0 as f64;
let b1 = b1 as f64;
((1.0 - a) * b0 + a * b1) as u8
}
fn interpolate(c0: Color, c1: Color, a: f64) -> Color {
Color(
interpolate_u8(c0.0, c1.0, a),
interpolate_u8(c0.1, c1.1, a),
interpolate_u8(c0.2, c1.2, a),
)
}
type Frame = Vec<Vec<Color>>;
fn send<T: Write>(w: &mut T, f: &Frame) -> std::io::Result<()> {
for l in f {
for c in l {
let Color(r, g, b) = c;
let buf = &[*r, *g, *b];
w.write_all(buf)?;
}
}
w.flush()
}
const DEFAULT_LOOP_TIME: usize = 120;
fn main() -> std::io::Result<()> {
let args = args().collect::<Vec<_>>();
eprintln!("executing {}", args[0]);
let x_size = args[1].parse::<usize>().unwrap();
let y_size = args[2].parse::<usize>().unwrap();
let loop_time = args[3].parse::<usize>().unwrap_or(DEFAULT_LOOP_TIME);
eprintln!(
"screen size {}x{}, loop time {:?}s",
x_size, y_size, loop_time
);
let mut border = 0;
while (x_size - 2 * border) * (y_size - 2 * border) > x_size * y_size / 2 {
border += 1;
}
let t_frame = 0.040; // s
let delay = Duration::new(0, (1_000_000_000.0 * t_frame) as u32);
let mut previous_color = Color::blue();
let colors = vec![
Color::red(),
Color::yellow(),
Color::green(),
Color::cyan(),
Color::blue(),
Color::magenta(),
];
let mut color_index = 0;
let mut next_color = colors[color_index];
// time to interpolate from one color to the next
let t_interpolate = (loop_time as f64) / (colors.len() as f64); // s
let delta_a = t_frame / t_interpolate;
let mut a = 0.0;
eprint!("delta_a {}", delta_a);
loop {
let c0 = interpolate(previous_color, next_color, a);
let c1 = c0.complement();
let mut frame = repeat(repeat(c0).take(x_size).collect::<Vec<_>>())
.take(y_size)
.collect::<Vec<_>>();
for x in border..(x_size - border) {
for y in border..(y_size - border) {
frame[y][x] = c1
}
}
a += delta_a;
if a >= 1.0 {
a = 0.0;
color_index += 1;
if color_index >= colors.len() {
color_index = 0;
}
previous_color = next_color;
next_color = colors[color_index];
}
let mut buf = Vec::with_capacity(x_size * y_size * 3);
send(&mut buf, &frame)?;
stdout().write_all(&buf)?;
stdout().flush()?;
sleep(delay);
}
}

225
src/bin/maze/main.rs
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use std::env::args;
use std::io::stdout;
use std::io::Write;
use std::thread::sleep;
use std::time::Duration;
use rand::thread_rng;
use rand::Rng;
#[derive(Clone, Copy, Debug)]
struct Color(u8, u8, u8);
#[allow(unused)]
impl Color {
fn black() -> Color {
Color(0, 0, 0)
}
fn white() -> Color {
Color(255, 255, 255)
}
fn gray50() -> Color {
Color(128, 128, 128)
}
fn red() -> Color {
Color(255, 0, 0)
}
fn green() -> Color {
Color(0, 255, 0)
}
fn blue() -> Color {
Color(0, 0, 255)
}
fn yellow() -> Color {
Color(255, 255, 0)
}
fn cyan() -> Color {
Color(0, 255, 255)
}
fn magenta() -> Color {
Color(255, 0, 255)
}
fn complement(&self) -> Color {
Color(255 - self.0, 255 - self.1, 255 - self.2)
}
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
enum Square {
Unknown,
Corridor,
Wall,
Start,
Finish,
}
struct Board(Vec<Vec<Square>>);
fn send<T: Write>(w: &mut T, board: &Board) -> std::io::Result<()> {
for line in &board.0 {
for square in line {
let Color(r, g, b) = match square {
Square::Unknown => Color::black(),
Square::Corridor => Color::yellow(),
Square::Wall => Color::blue(),
Square::Start => Color::red(),
Square::Finish => Color::green(),
};
let buf = &[r, g, b];
w.write_all(buf)?;
}
}
w.flush()
}
impl Board {
fn new(x_size: i32, y_size: i32, x_maze_size: i32, y_maze_size: i32) -> Board {
Board(
(0..y_size)
.map(move |y| {
(0..x_size)
.map(|x| {
if x < x_maze_size && y < y_maze_size {
if x == 0
|| x == x_maze_size - 1
|| y == 0
|| y == y_maze_size - 1
|| (x % 2 == 0 && y % 2 == 0)
{
Square::Wall
} else {
Square::Unknown
}
} else {
Square::Unknown
}
})
.collect::<Vec<_>>()
})
.collect::<Vec<_>>(),
)
}
fn get(&self, pos: (i32, i32)) -> Square {
let (x, y) = pos;
self.0[y as usize][x as usize]
}
fn set(&mut self, pos: (i32, i32), sq: Square) {
let (x, y) = pos;
self.0[y as usize][x as usize] = sq;
}
}
struct Move {
from: (i32, i32),
dir: (i32, i32),
prio: i32,
}
fn add_move(open: &mut Vec<Move>, arg: isize, from: (i32, i32), dir: (i32, i32)) {
open.push(Move { from, dir, prio: 0 });
open.sort_unstable_by(|Move { prio: pa, .. }, Move { prio: pb, .. }| pa.cmp(pb));
}
const DEFAULT_ARG: isize = 16;
fn main() -> std::io::Result<()> {
let args = args().collect::<Vec<_>>();
eprintln!("executing {}", args[0]);
let x_size = args[1].parse::<usize>().unwrap();
let y_size = args[2].parse::<usize>().unwrap();
let arg = args[3].parse::<isize>().unwrap_or(DEFAULT_ARG);
eprintln!("screen size {}x{}, arg {}", x_size, y_size, arg);
let mut rng = thread_rng();
let t_frame = 0.040; // s
let delay = Duration::new(0, (1_000_000_000.0 * t_frame) as u32);
let mut t_wait = 0.0; // s
let x_size = x_size as i32;
let y_size = y_size as i32;
let x_maze_size = (x_size - 1) / 2 * 2 + 1;
let y_maze_size = (y_size - 1) / 2 * 2 + 1;
let x_maze_mid = (x_maze_size - 1) / 4 * 2 + 1;
let y_maze_mid = (y_maze_size - 1) / 4 * 2 + 1;
let mut board = Board(Vec::new());
let mut open = Vec::new();
loop {
if open.is_empty() {
if t_wait > 0.0 {
t_wait -= t_frame;
} else {
t_wait = 60.0; // s
board = Board::new(x_size, y_size, x_maze_size, y_maze_size);
// start in the middle
let mid = (x_maze_mid, y_maze_mid);
board.set(mid, Square::Corridor);
add_move(&mut open, arg, mid, (1, 0));
add_move(&mut open, arg, mid, (0, 1));
add_move(&mut open, arg, mid, (-1, 0));
add_move(&mut open, arg, mid, (0, -1));
}
} else {
let work = arg.max(1);
let mut count = 0;
while !open.is_empty() && count < work {
let mut start = 0;
let mut limit = 0;
let mut prio = open[limit].prio;
loop {
limit += 1;
if limit >= open.len() {
break;
}
if open[limit].prio > prio {
if rng.gen::<f64>() >= 0.4 {
break;
}
start = limit;
prio = open[limit].prio;
}
}
let r = rng.gen_range(start, limit);
let Move {
from: (x0, y0),
dir: (dx, dy),
..
} = open.remove(r);
let (x1, y1) = (x0 + dx, y0 + dy);
let (x2, y2) = (x1 + dx, y1 + dy);
if board.get((x1, y1)) == Square::Unknown {
board.set((x1, y1), Square::Corridor);
board.set((x2, y2), Square::Corridor);
for (dx, dy) in vec![(1, 0), (0, 1), (-1, 0), (0, -1)] {
let (x3, y3) = (x2 + dx, y2 + dy);
let (x4, y4) = (x3 + dx, y3 + dy);
if board.get((x3, y3)) == Square::Unknown {
if board.get((x4, y4)) == Square::Unknown {
add_move(&mut open, arg, (x2, y2), (dx, dy));
} else {
board.set((x3, y3), Square::Wall);
}
}
}
count += 1;
}
}
if open.is_empty() {
board.set((1, 1), Square::Start);
board.set((x_maze_size - 2, y_maze_size - 2), Square::Finish);
}
}
let mut buf = Vec::with_capacity((x_size * y_size * 3) as usize);
send(&mut buf, &board)?;
stdout().write_all(&buf)?;
stdout().flush()?;
sleep(delay);
}
}

166
src/bin/predprey/main.rs
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use std::env::args;
use std::io::stdout;
use std::io::Write;
use std::iter::repeat_with;
use std::thread::sleep;
use std::time::Duration;
use rand::thread_rng;
use rand::Rng;
#[derive(Clone, Copy, Debug)]
struct Color(u8, u8, u8);
#[allow(unused)]
impl Color {
fn black() -> Color {
Color(0, 0, 0)
}
fn white() -> Color {
Color(255, 255, 255)
}
fn gray50() -> Color {
Color(128, 128, 128)
}
fn red() -> Color {
Color(255, 0, 0)
}
fn green() -> Color {
Color(0, 255, 0)
}
fn blue() -> Color {
Color(0, 0, 255)
}
fn yellow() -> Color {
Color(255, 255, 0)
}
fn cyan() -> Color {
Color(0, 255, 255)
}
fn magenta() -> Color {
Color(255, 0, 255)
}
fn complement(&self) -> Color {
Color(255 - self.0, 255 - self.1, 255 - self.2)
}
}
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
enum Square {
Empty,
Grass,
Rabbit,
Fox,
}
type Board = Vec<Vec<Square>>;
fn send<T: Write>(w: &mut T, board: &Board) -> std::io::Result<()> {
for line in board {
for square in line {
let Color(r, g, b) = match square {
Square::Empty => Color::blue(),
Square::Grass => Color::green(),
Square::Rabbit => Color::yellow(),
Square::Fox => Color::red(),
};
let buf = &[r, g, b];
w.write_all(buf)?;
}
}
w.flush()
}
const DEFAULT_ARG: usize = 10;
fn grow(board: &Board, x: usize, y: usize, grow: Square, die: Square) -> Square {
let x_size = board[0].len() as isize;
let y_size = board.len() as isize;
let x = x as isize;
let y = y as isize;
for (dx, dy) in vec![(1, 0), (0, 1), (-1, 0), (0, -1)] {
let x1 = x + dx;
let y1 = y + dy;
if 0 <= x1 && x1 < x_size && 0 <= y1 && y1 < y_size {
let neigh_sq = board[y1 as usize][x1 as usize];
if neigh_sq == grow {
return grow;
}
}
}
die
}
fn main() -> std::io::Result<()> {
let args = args().collect::<Vec<_>>();
eprintln!("executing {}", args[0]);
let x_size = args[1].parse::<usize>().unwrap();
let y_size = args[2].parse::<usize>().unwrap();
let arg = args[3].parse::<usize>().unwrap_or(DEFAULT_ARG);
eprintln!("screen size {}x{}, arg {}", x_size, y_size, arg);
let mut rng = thread_rng();
let p_empty = 0.25;
let p_grass = 0.25;
let p_rabbit = 0.25;
// p_fox = 0.05
let mut board = repeat_with(|| {
repeat_with(|| {
let p = rng.gen::<f64>();
if p < p_empty {
Square::Empty
} else if p < p_empty + p_grass {
Square::Grass
} else if p < p_empty + p_grass + p_rabbit {
Square::Rabbit
} else {
Square::Fox
}
})
.take(x_size)
.collect::<Vec<_>>()
})
.take(y_size)
.collect::<Vec<_>>();
let t_frame = 0.040; // s
let delay = Duration::new(0, (1_000_000_000.0 * t_frame) as u32);
let x_mid = (x_size - 1) as f64 / 2.0;
let y_mid = (y_size - 1) as f64 / 2.0;
let r = (x_size.min(y_size) - 1) as f64 / 2.5;
loop {
for _ in 0..arg {
let x = rng.gen_range(0, x_size);
let y = rng.gen_range(0, y_size);
let sq = board[y][x];
let dx = (x as f64 - x_mid as f64) / r as f64;
let dy = (y as f64 - y_mid as f64) / r as f64;
let p0 = (dx * dx + dy * dy).min(1.0);
let p_survive = match sq {
Square::Empty => 1.0,
Square::Grass => p0,
Square::Rabbit => p0,
Square::Fox => 0.8 * p0,
};
let new_sq = if rng.gen::<f64>() < p_survive {
sq
} else {
Square::Empty
};
board[y][x] = match sq {
Square::Empty => grow(&board, x, y, Square::Grass, new_sq),
Square::Grass => grow(&board, x, y, Square::Rabbit, new_sq),
Square::Rabbit => grow(&board, x, y, Square::Fox, new_sq),
Square::Fox => new_sq,
};
}
let mut buf = Vec::with_capacity(x_size * y_size * 3);
send(&mut buf, &board)?;
stdout().write_all(&buf)?;
stdout().flush()?;
sleep(delay);
}
}

7
src/lib.rs
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#[cfg(test)]
mod tests {
#[test]
fn it_works() {
assert_eq!(2 + 2, 4);
}
}
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