Method estimate_bounds

egui_plot/src/data.rs:202–241

(&self)

impl ExplicitGenerator<'_> {
    fn estimate_bounds(&self) -> PlotBounds {
        let mut bounds = PlotBounds::NOTHING;

        let mut add_x = |x: f64| {
            // avoid infinities, as we cannot auto-bound on them!
            if x.is_finite() {
                bounds.extend_with_x(x);
            }
            let y = (self.function)(x);
            if y.is_finite() {
                bounds.extend_with_y(y);
            }
        };

        let min_x = *self.x_range.start();
        let max_x = *self.x_range.end();

        add_x(min_x);
        add_x(max_x);

        if min_x.is_finite() && max_x.is_finite() {
            // Sample some points in the interval:
            const N: u32 = 8;
            for i in 1..N {
                let t = i as f64 / (N - 1) as f64;
                let x = lerp(min_x..=max_x, t);
                add_x(x);
            }
        } else {
            // Try adding some points anyway:
            for x in [-1, 0, 1] {
                let x = x as f64;
                if min_x <= x && x <= max_x {
                    add_x(x);
                }
            }
        }

        bounds
    }
}