smart_led_effects 0.1.8

A collection of effects for LED strips
Documentation 
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use crate::strip::EffectIterator;
use palette::{FromColor, Hsv, ShiftHue, Srgb};

pub struct Cycle {
    last_state: Vec<Hsv>,
    step_size: f32,
}

impl Cycle {
    pub fn new(count: usize, steps: Option<usize>) -> Self {
        let color = Hsv::new(0.0, 1.0, 1.0);
        let last_state = vec![color; count];

        let step = steps.unwrap_or(360);
        let step_size = 360.0 / step as f32;

        Cycle {
            last_state,
            step_size,
        }
    }
}

impl EffectIterator for Cycle {
    fn name(&self) -> &'static str {
        "Cycle"
    }

    fn next(&mut self) -> Option<Vec<Srgb<u8>>> {
        if let Some(pixel) = self.last_state.first() {
            self.last_state = vec![pixel.shift_hue(self.step_size); self.last_state.len()];
            Some(
                self.last_state
                    .iter()
                    .map(|x| Srgb::from_color(*x).into_format::<u8>())
                    .collect::<Vec<Srgb<u8>>>(),
            )
        } else {
            None
        }
    }
}