Find layouts using randomness

This commit is contained in:
Arne Keller 2019-04-25 21:56:39 +02:00
parent 7e05556e99
commit 43c6eb4298
3 changed files with 316 additions and 1 deletions

137
Cargo.lock generated
View File

@ -5,6 +5,7 @@ name = "aufgabe2"
version = "0.1.0" version = "0.1.0"
dependencies = [ dependencies = [
"geo 0.12.0 (git+https://github.com/FliegendeWurst/geo)", "geo 0.12.0 (git+https://github.com/FliegendeWurst/geo)",
"rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
"svg 0.5.12 (registry+https://github.com/rust-lang/crates.io-index)", "svg 0.5.12 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
@ -35,6 +36,11 @@ dependencies = [
"libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)", "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]]
name = "bitflags"
version = "1.0.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]] [[package]]
name = "cc" name = "cc"
version = "1.0.35" version = "1.0.35"
@ -45,6 +51,14 @@ name = "cfg-if"
version = "0.1.7" version = "0.1.7"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "cloudabi"
version = "0.0.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]] [[package]]
name = "failure" name = "failure"
version = "0.1.5" version = "0.1.5"
@ -65,6 +79,11 @@ dependencies = [
"synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)", "synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]]
name = "fuchsia-cprng"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]] [[package]]
name = "geo" name = "geo"
version = "0.12.0" version = "0.12.0"
@ -124,6 +143,110 @@ dependencies = [
"proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)", "proc-macro2 0.4.27 (registry+https://github.com/rust-lang/crates.io-index)",
] ]
[[package]]
name = "rand"
version = "0.6.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
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"winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand_chacha"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
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"autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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[[package]]
name = "rand_core"
version = "0.3.1"
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dependencies = [
"rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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name = "rand_core"
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[[package]]
name = "rand_isaac"
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[[package]]
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]
[[package]]
name = "rand_os"
version = "0.1.3"
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"rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rand_pcg"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
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"autocfg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
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[[package]] [[package]]
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"checksum fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
"checksum geo 0.12.0 (git+https://github.com/FliegendeWurst/geo)" = "<none>" "checksum geo 0.12.0 (git+https://github.com/FliegendeWurst/geo)" = "<none>"
"checksum geo-types 0.4.1 (git+https://github.com/FliegendeWurst/geo)" = "<none>" "checksum geo-types 0.4.1 (git+https://github.com/FliegendeWurst/geo)" = "<none>"
"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917" "checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
@ -213,6 +339,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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View File

@ -7,3 +7,4 @@ edition = "2018"
[dependencies] [dependencies]
geo = { git = "https://github.com/FliegendeWurst/geo" } geo = { git = "https://github.com/FliegendeWurst/geo" }
svg = "0.5.12" svg = "0.5.12"
rand = "0.6.5"

View File

@ -1,4 +1,6 @@
use geo::prelude::*; use geo::prelude::*;
use rand::distributions::{Bernoulli, Distribution};
use rand::prelude::*;
use std::cmp; use std::cmp;
use std::collections::BinaryHeap; use std::collections::BinaryHeap;
@ -35,8 +37,183 @@ impl cmp::PartialOrd for World {
} }
} }
#[allow(clippy::cyclomatic_complexity)] fn random_world(rng: &mut SmallRng, tris: &mut [Triangle], angles: &mut [f32], flips: &mut [bool]) -> World {
tris.shuffle(rng);
let mut world = World { tris: Vec::with_capacity(tris.len()), width: 0.0 };
for (idx, tri) in tris.iter().enumerate() {
let mut tri = *tri;
flips[idx] = rng.gen();
if flips[idx] {
tri.0.x *= -1.0;
tri.1.x *= -1.0;
tri.2.x *= -1.0;
}
angles[idx] = rng.gen_range(0.0, 2.0*PI);
tri = rotate(tri, angles[idx]);
let minx = min(min(tri.0.x, tri.1.x), tri.2.x);
tri.0.x -= minx;
tri.1.x -= minx;
tri.2.x -= minx;
let miny = min(min(tri.0.y, tri.1.y), tri.2.y);
tri.0.y -= miny;
tri.1.y -= miny;
tri.2.y -= miny;
if world.tris.is_empty() {
world.tris.push((0, tri));
world.normalize();
} else {
tri.0.x += 1.0;
tri.1.x += 1.0;
tri.2.x += 1.0;
for &delta in &[
/*10.0, 5.0,*/ 1.0, 0.6, 0.32, 0.18, 0.1, 0.06, 0.03, 0.01
] {
//println!("moving {:?}", tri);
//println!("world {:?}", world);
let initial_state = world.tris[0..idx].iter().any(|(_, x)| x.intersects(&tri));
let dx = if initial_state { delta } else { -delta };
while world.tris[0..idx].iter().any(|(_, x)| x.intersects(&tri)) == initial_state {
tri.0.x += dx;
tri.1.x += dx;
tri.2.x += dx;
}
}
world.tris.push((0, tri));
world.normalize();
}
}
world.calc_width();
world
}
fn construct_world(tris: &[Triangle], angles: &[f32], flips: &[bool]) -> World {
let mut world = World { tris: Vec::with_capacity(tris.len()), width: 0.0 };
for (idx, tri) in tris.iter().enumerate() {
let mut tri = *tri;
if flips[idx] {
tri.0.x *= -1.0;
tri.1.x *= -1.0;
tri.2.x *= -1.0;
}
tri = rotate(tri, angles[idx]);
let minx = min(min(tri.0.x, tri.1.x), tri.2.x);
tri.0.x -= minx;
tri.1.x -= minx;
tri.2.x -= minx;
let miny = min(min(tri.0.y, tri.1.y), tri.2.y);
tri.0.y -= miny;
tri.1.y -= miny;
tri.2.y -= miny;
if world.tris.is_empty() {
world.tris.push((0, tri));
world.normalize();
} else {
tri.0.x += 1.0;
tri.1.x += 1.0;
tri.2.x += 1.0;
for &delta in &[
/*10.0, 5.0,*/ 1.0, 0.6, 0.32, 0.18, 0.1, 0.06, 0.03, 0.01
] {
let initial_state = world.tris[0..idx].iter().any(|(_, x)| x.intersects(&tri));
let dx = if initial_state { delta } else { -delta };
while world.tris[0..idx].iter().any(|(_, x)| x.intersects(&tri)) == initial_state {
tri.0.x += dx;
tri.1.x += dx;
tri.2.x += dx;
}
}
world.tris.push((0, tri));
world.normalize();
}
}
world.calc_width();
world
}
fn main() { fn main() {
let mut tris = input::read_input();
let mut angles = vec![0.0; tris.len()];
let mut flips = vec![false; tris.len()];
let mut rng = SmallRng::from_entropy();
let save_prefix = "rand_";
let mut save_counter = 0;
let mut last_improvement = 0;
let mut best_width = f32::MAX;
let mut best_all = f32::MAX;
let mut random = random_world(&mut rng, &mut tris, &mut angles, &mut flips);
loop {
save_counter += 1;
if save_counter % 100_000 == 0 {
eprint!("\r[{}]", save_counter);
}
if random.width < best_width {
best_width = random.width;
last_improvement = save_counter;
if best_width < best_all {
best_all = best_width;
println!("[{}] BEST: {}", save_counter, random.width);
display::save_world(&format!("{}{}.svg", save_prefix, save_counter), &random);
optimize(99999, &mut best_all, &mut best_width, &tris, &mut angles, &mut flips, &mut rng, save_prefix, save_counter);
} else {
//eprint!("[{}] best: {} (min: {})", save_counter, random.width, best_all);
eprint!(".");
optimize(24999, &mut best_all, &mut best_width, &tris, &mut angles, &mut flips, &mut rng, save_prefix, save_counter);
}
}
random = random_world(&mut rng, &mut tris, &mut angles, &mut flips);
if save_counter - last_improvement > 200_000 {
// "restart"
best_width += 5.0;
}
}
}
#[allow(clippy::too_many_arguments)]
fn optimize(iters: usize, best_all: &mut f32, best_width: &mut f32, tris: &[Triangle], best_angles: &mut Vec<f32>, best_flips: &mut Vec<bool>, rng: &mut SmallRng, save_prefix: &'static str, save_counter: usize) {
let mut found_better = true;
let mut iteration = 0;
let flip_choice = Bernoulli::from_ratio(1, 11);
while found_better {
found_better = false;
// slightly modify angles
let start_angles = best_angles.clone();
let start_flips = best_flips.clone();
let mut angles = start_angles.clone();
let mut flips = start_flips.clone();
for i in 0..iters {
for a in &mut angles {
*a += rng.gen_range(-0.2, 0.2);
}
for f in &mut flips {
if flip_choice.sample(rng) {
*f = !*f;
}
}
// construct new world
let new = construct_world(tris, &angles, &flips);
if new.width < *best_width {
if new.width < *best_all {
*best_all = new.width;
println!("[{}O{}o{}] BEST: {}", save_counter, iteration, i, new.width);
display::save_world(&format!("{}{}_{}_{}.svg", save_prefix, save_counter, iteration, i), &new);
} else {
//eprint!("[{}O{}o{}] best: {} (min: {})", save_counter, iteration, i, new.width, best_all);
eprint!(".");
}
*best_width = new.width;
found_better = true;
*best_angles = angles;
*best_flips = flips;
}
angles = start_angles.clone();
flips = start_flips.clone();
}
iteration += 1;
}
}
#[allow(clippy::cyclomatic_complexity)]
pub fn main_old() {
let tris = input::read_input(); let tris = input::read_input();
let count_tris = tris.len(); let count_tris = tris.len();
let tris = transformations(&tris); let tris = transformations(&tris);