pub fn gen_points_fan(
radius: f32,
n: usize,
st_angle: f32,
ed_angle: f32,
) -> Vec<Vec2>Expand description
Generate random Vec2 within a fan-shape range
Examples found in repository?
examples/fountain.rs (lines 77-82)
74fn gen_fountain_firework(center: Vec2) -> Firework {
75 let colors = vec![(226, 196, 136), (255, 245, 253), (208, 58, 99)];
76 let mut particles = Vec::new();
77 for v in gen_points_fan(
78 300.,
79 45,
80 5 as f32 / 12 as f32 * PI,
81 7 as f32 / 12 as f32 * PI,
82 )
83 .iter()
84 {
85 particles.push(ParticleConfig::new(
86 center,
87 *v,
88 thread_rng().gen_range(28..38),
89 Duration::from_secs_f32(thread_rng().gen_range(2.5..3.8)),
90 *colors.iter().choose(&mut thread_rng()).unwrap(),
91 ));
92 }
93 let mut config = FireworkConfig::default()
94 .with_ar_scale(0.15)
95 .with_gravity_scale(0.5)
96 .with_gradient_scale(gradient);
97 config.set_enable_gradient(true);
98 Firework {
99 init_time: SystemTime::now(),
100 spawn_after: Duration::ZERO,
101 center,
102 particles,
103 config,
104 form: ExplosionForm::Sustained {
105 lasts: Duration::from_secs(5),
106 time_interval: Duration::from_secs_f32(0.08),
107 timer: Duration::ZERO,
108 },
109 ..Default::default()
110 }
111}More examples
examples/heart.rs (line 85)
74fn gen_heart_firework(center: Vec2) -> Firework {
75 let colors = vec![
76 (233, 232, 237),
77 (254, 142, 130),
78 (200, 27, 72),
79 (86, 18, 31),
80 ];
81 let mut particles = Vec::new();
82 let trail_length = thread_rng().gen_range(100..105);
83 let life_time = Duration::from_secs_f32(thread_rng().gen_range(3.0..3.2));
84 let init_pos = center - Vec2::NEG_Y * 15.;
85 for v in gen_points_fan(300., 45, 0.2 * PI, 0.3 * PI).iter() {
86 particles.push(ParticleConfig::new(
87 init_pos,
88 *v,
89 trail_length,
90 life_time,
91 *colors.iter().choose(&mut thread_rng()).unwrap(),
92 ));
93 }
94 for v in gen_points_fan(300., 45, 0.7 * PI, 0.8 * PI).iter() {
95 particles.push(ParticleConfig::new(
96 init_pos,
97 *v,
98 trail_length,
99 life_time,
100 *colors.iter().choose(&mut thread_rng()).unwrap(),
101 ));
102 }
103 let mut config = FireworkConfig::default()
104 .with_ar_scale(0.1)
105 .with_gravity_scale(0.1)
106 .with_gradient_scale(gradient)
107 .with_additional_force(move |particle| (center - particle.pos) * 2.);
108 config.set_enable_gradient(true);
109 Firework {
110 init_time: SystemTime::now(),
111 spawn_after: Duration::ZERO,
112 center,
113 particles,
114 config,
115 form: ExplosionForm::Instant { used: false },
116 ..Default::default()
117 }
118}