#[derive(Debug, Clone)]
pub struct Buf {
    width: usize,
    height: usize,
    pub buf: Vec<f32>,
}

impl Buf {
    pub fn new(width: usize, height: usize) -> Self {
        Buf {
            width,
            height,
            buf: vec![0.0; height * width],
        }
    }

    // Truncate x and y and return a corresponding index into the data slice.
    const fn index(&self, x: f32, y: f32) -> usize {
        crate::util::index(self.width, self.height, x, y)
    }

    // Get the buffer value at a given position. The implementation effectively treats data as periodic, hence any finite position will produce a value.
    pub fn get_buf(&self, x: f32, y: f32) -> f32 {
        self.buf[self.index(x, y)]
    }
}