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rename fn

This commit is contained in:
Joe Ardent 2022-01-19 16:02:17 -08:00
parent c0227f4203
commit f951b7b96b
2 changed files with 3 additions and 3 deletions
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4
src/lib.rs
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@ -25,7 +25,7 @@ pub fn disable_mouse_trap(mut windows: ResMut<Windows>) {
window.set_cursor_visibility(true); window.set_cursor_visibility(true);
} }
pub fn random_sphere_vec(r: &mut impl rand::prelude::Rng) -> Vec3 { pub fn random_unit_vec(r: &mut impl rand::prelude::Rng) -> Vec3 {
// https://mathworld.wolfram.com/SpherePointPicking.html // https://mathworld.wolfram.com/SpherePointPicking.html
// Marsaglia (1972) for picking x1 and x2 from (-1, 1) and generating surface // Marsaglia (1972) for picking x1 and x2 from (-1, 1) and generating surface
// points directly if their sum is less than 1. // points directly if their sum is less than 1.
@ -38,7 +38,7 @@ pub fn random_sphere_vec(r: &mut impl rand::prelude::Rng) -> Vec3 {
x2 = r.gen_range(-1.0..=1.0); x2 = r.gen_range(-1.0..=1.0);
ssum = x1.powi(2) + x2.powi(2); ssum = x1.powi(2) + x2.powi(2);
} }
let sqrt = (1.0 - x1.powi(2) - x2.powi(2)).sqrt(); let sqrt = (1.0 - ssum).sqrt();
let x = 2.0 * x1 * sqrt; let x = 2.0 * x1 * sqrt;
let y = 2.0 * x2 * sqrt; let y = 2.0 * x2 * sqrt;
let z = 1.0 - 2.0 * ssum; let z = 1.0 - 2.0 * ssum;

2
src/lights.rs
View File

@ -25,7 +25,7 @@ fn spawn_moving_lights(
// spawn 200 orbiting bisexual lights // spawn 200 orbiting bisexual lights
for _ in 0..255 { for _ in 0..255 {
// mechanics // mechanics
let axis = crate::random_sphere_vec(rng); let axis = crate::random_unit_vec(rng);
let angle = rng.gen_range(0.0..TAU); let angle = rng.gen_range(0.0..TAU);
let rate: f32 = rng.gen_range(7.0..10.0); let rate: f32 = rng.gen_range(7.0..10.0);
let rate = rate.to_radians(); let rate = rate.to_radians();