lut_cube/
cube.rs

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type InputRange = std::ops::RangeInclusive<f32>;

pub struct Cube {
    pub(crate) dim: u8,
    pub(crate) size: u16,
    pub(crate) input_range: Option<InputRange>,
    pub(crate) rgbs: Box<[f32]>,
}

pub(crate) fn parse_input_range(s: &str, delimiter: &[char]) -> crate::Result<InputRange> {
    let Some((min, max)) = s.split_once(delimiter) else {
        return Err("invalid input range".into());
    };
    Ok(min.parse()?..=max.parse()?)
}

impl Cube {
    pub fn one_d(size: u16) -> Self {
        Self {
            dim: 1,
            size,
            input_range: None,
            rgbs: vec![0.0; size as usize * 3].into(),
        }
    }

    pub fn three_d(size: u16) -> Self {
        Self {
            dim: 3,
            size,
            input_range: None,
            rgbs: vec![0.0; (size as usize).pow(3) * 3].into(),
        }
    }

    pub fn dim(&self) -> u8 {
        self.dim
    }

    pub fn size(&self) -> u16 {
        self.size
    }

    pub fn input_range(&self) -> Option<&InputRange> {
        self.input_range.as_ref()
    }

    pub fn set_input_range(&mut self, val: Option<InputRange>) {
        self.input_range = val;
    }

    pub fn r_len(&self) -> usize {
        self.rgbs.len()
    }

    pub fn raw(&self) -> &[f32] {
        &self.rgbs
    }
}