Function find_segment_covering_x

src/plot_state.rs:1020–1035

(points: &[[f64; 2]], x: f64)

    data_min: Option<DVec2>,
    data_max: Option<DVec2>,
) -> Option<(f64, f64)> {
    if let Some((min, max)) = widget.y_lim
        && let (Some(min), Some(max)) = (
            widget.y_axis_scale.data_to_plot(min),
            widget.y_axis_scale.data_to_plot(max),
        )
    {
        return (min < max).then_some((min, max));
    }
    match (data_min, data_max) {
        (Some(min), Some(max)) if min.y < max.y => Some((min.y, max.y)),
        _ => None,
    }
}

fn transformed_series_points(
    series: &crate::Series,
    x_axis_scale: AxisScale,
    y_axis_scale: AxisScale,