pub fn gen_points_circle(radius: isize, n: usize) -> Vec<Vec2>Expand description
Generate random Vec2 within a circle range
Examples found in repository?
examples/vortex.rs (line 82)
73fn gen_vortex_firework(center: Vec2) -> Firework {
74 let colors = vec![
75 (6, 55, 63),
76 (24, 90, 96),
77 (47, 123, 119),
78 (92, 174, 166),
79 (200, 255, 255),
80 ];
81 let mut particles = Vec::new();
82 for p in gen_points_circle(30, 45).iter() {
83 particles.push(ParticleConfig::new(
84 center + *p,
85 Vec2::new((*p).y, -(*p).x).normalize() * 15.,
86 thread_rng().gen_range(28..40),
87 Duration::from_secs_f32(thread_rng().gen_range(4.5..7.0)),
88 *colors.iter().choose(&mut thread_rng()).unwrap(),
89 ));
90 }
91 let mut config = FireworkConfig::default()
92 .with_ar_scale(0.05)
93 .with_gravity_scale(0.)
94 .with_gradient_scale(gradient)
95 .with_additional_force(move |particle| {
96 (center - particle.pos).normalize() * (1. / center.distance(particle.pos)) * 150.
97 });
98 config.set_enable_gradient(true);
99 Firework {
100 init_time: SystemTime::now(),
101 spawn_after: Duration::ZERO,
102 center,
103 particles,
104 config,
105 form: ExplosionForm::Sustained {
106 lasts: Duration::from_secs(10),
107 time_interval: Duration::from_secs_f32(0.01),
108 timer: Duration::ZERO,
109 },
110 ..Default::default()
111 }
112}