use bevy::{ ecs::schedule::StageLabel, prelude::{ResMut, SystemLabel, Vec3, Windows}, }; pub mod action; pub mod bike; pub mod camera; pub mod glamor; pub mod input; pub mod lights; pub mod planet; pub mod ui; #[derive(Clone, Debug, Hash, PartialEq, Eq, SystemLabel, StageLabel)] pub enum Label { Geometry, Glamor, Input, Action, } pub fn disable_mouse_trap(mut windows: ResMut) { let window = windows.get_primary_mut().unwrap(); window.set_cursor_grab_mode(bevy::window::CursorGrabMode::None); window.set_cursor_visibility(true); } pub fn random_unit_vec(r: &mut impl rand::prelude::Rng) -> Vec3 { // https://mathworld.wolfram.com/SpherePointPicking.html // Marsaglia (1972) for picking x1 and x2 from (-1, 1) and generating surface // points directly if their sum is less than 1. let mut x1: f32 = 0.0; let mut x2: f32 = 0.0; let mut ssum = std::f32::MAX; while ssum >= 1.0 { x1 = r.gen_range(-1.0..=1.0); x2 = r.gen_range(-1.0..=1.0); ssum = x1.powi(2) + x2.powi(2); } let sqrt = (1.0 - ssum).sqrt(); let x = 2.0 * x1 * sqrt; let y = 2.0 * x2 * sqrt; let z = 1.0 - 2.0 * ssum; Vec3::new(x, y, z).normalize() }