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use crate::nn::Nn;
use crate::game::{Game, JumpGame};
use crate::gui::Gui;
use rand::Rng;
fn randto(x: f32) -> f32 {
rand::thread_rng().gen_range(0.0, x)
}
pub struct Trainer {
}
pub fn train() {
let (cols, rows) = (20, 16);
//let colony_size = 64;
let colony_size = 64;
let thread_count = colony_size;
let mut seed = 42;
let mut best: Option<Nn> = None;
for generation in 0.. {
println!("Generation #{}", generation);
println!("===============");
println!("generating colony");
let nn_colony: Vec<Nn> = if generation == 0 {
let gen = || Nn::new_by_game_res(cols, rows, &Nn::new_random);
std::iter::repeat_with(gen)
.take(colony_size).collect()
} else if let Some(nn) = best.clone() {
let gen = || {let mut nn = nn.clone(); nn.add_noise(randto(2.0), randto(0.18), randto(1.0), 0.06); nn};
std::iter::repeat_with(gen)
.take(colony_size - 1).chain(std::iter::once(nn.clone())).collect()
} else {
panic!("no colony")
};
println!(" ...done");
let points: Vec<u64> = nn_colony.chunks(thread_count).flat_map(|chunk| {
println!("begin chunk");
let threads: Vec<std::thread::JoinHandle<u64>> = chunk.iter().enumerate().map(|(i, nn)| {
println!("nn #{}", i);
let nn = nn.clone();
std::thread::spawn(move || {
let game = JumpGame::new(cols, rows, seed);
nn.execute(game)
}
)}).collect();
let mut results = Vec::with_capacity(threads.len());
for thread in threads {
results.push(thread.join().unwrap());
}
results
}).collect();
best = points.iter().zip(nn_colony.iter())
.max_by_key(|(ref p, _)| p.clone())
.map(|(_, n)| n.clone());
println!("points: {:?}", points);
println!("max: {:?}", points.iter().max());
if (generation % 25) == 0 {
let game = JumpGame::new(cols, rows, seed);
Gui::run(best.clone().unwrap().execute_logged(game));
seed += 1;
}
}
}
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