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bitart: Pick a random corner as the origin

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This commit is contained in:
Juergen Stuber
2026-03-18 19:38:16 +01:00
parent e1baf1eb66
commit 18025b76a5
1 changed files with 7 additions and 2 deletions
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9
src/bin/bitart/main.rs
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@@ -21,6 +21,7 @@ mod expression;
use expression::Env; use expression::Env;
use expression::RandomExpressionBuilder; use expression::RandomExpressionBuilder;
use expression::Variable; use expression::Variable;
use rand::seq::IndexedRandom;
fn random_color<R: Rng>(rng: &mut R) -> Color { fn random_color<R: Rng>(rng: &mut R) -> Color {
let a = 255; let a = 255;
@@ -122,12 +123,16 @@ fn main() -> std::io::Result<()> {
if time_count >= frame_time_count { if time_count >= frame_time_count {
time_count = 0; time_count = 0;
// Pick a random corner as the origin.
let &(x0, xk) = [(0, 1), (bbox.x_max(), -1)].choose(&mut rng).unwrap();
let &(y0, yk) = [(0, 1), (bbox.y_max(), -1)].choose(&mut rng).unwrap();
// Pick a random expression. // Pick a random expression.
loop { loop {
let expression = RandomExpressionBuilder::build(&mut rng); let expression = RandomExpressionBuilder::build(&mut rng);
let values = Array2d::with(bbox, |p| { let values = Array2d::with(bbox, |p| {
let x = p.x(); let x = x0 + xk * p.x();
let y = p.y(); let y = y0 + yk * p.y();
let env = Env { x, y }; let env = Env { x, y };
expression.eval(&env) expression.eval(&env)
}); });