Function monotonic_increasing_x

src/plot_state.rs:1005–1018

Keep only strictly increasing-x points in their original order. This avoids sorting and lets fill interpolation run in linear time. Out-of-order (or duplicate-x) points are skipped.

(points: Vec<[f64; 2]>)

        && let (Some(min), Some(max)) = (
            widget.x_axis_scale.data_to_plot(min),
            widget.x_axis_scale.data_to_plot(max),
        )
    {
        return (min < max).then_some((min, max));
    }
    match (data_min, data_max) {
        (Some(min), Some(max)) if min.x < max.x => Some((min.x, max.x)),
        _ => None,
    }
}

fn plot_y_domain(
    widget: &PlotWidget,
    data_min: Option<DVec2>,
    data_max: Option<DVec2>,
) -> Option<(f64, f64)> {
    if let Some((min, max)) = widget.y_lim