Use 2d stuff in predator & prey animation.
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3389551f05
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de52bca34e
@ 9,6 +9,9 @@ use rand::thread_rng;


use rand::Rng;




use pixelfoo::color::Color;


use pixelfoo::p2;


use pixelfoo::point2d::Point2d;


use pixelfoo::vec2d::Vec2d;




#[derive(Clone, Copy, Debug, PartialEq, Eq)]


enum Square {


@ 37,16 +40,13 @@ fn send<T: Write>(w: &mut T, board: &Board) > std::io::Result<()> {




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];


fn grow(board: &Board, pos: Point2d, grow: Square, die: Square) > Square {


let x_size = board[0].len() as i32;


let y_size = board.len() as i32;


for dir in Vec2d::directions() {


let pos1 = pos + dir;


if 0 <= pos1.x && pos1.x < x_size && 0 <= pos1.y && pos1.y < y_size {


let neigh_sq = board[pos1.y as usize][pos1.x as usize];


if neigh_sq == grow {


return grow;


}


@ 92,9 +92,13 @@ fn main() > std::io::Result<()> {


let t_frame = 0.040; // s


let delay = Duration::new(0, (1_000_000_000.0 * t_frame) as u32);




// mid point of the board


let x_mid = (x_size  1) as f64 / 2.0;


let y_mid = (y_size  1) as f64 / 2.0;




// radius of the death zone in the middle


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);


@ 114,13 +118,15 @@ fn main() > std::io::Result<()> {


} else {


Square::Empty


};


let pos = p2!(x as i32, y as i32);


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::Empty => grow(&board, pos, Square::Grass, new_sq),


Square::Grass => grow(&board, pos, Square::Rabbit, new_sq),


Square::Rabbit => grow(&board, pos, 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)?;



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