Function graph_layout::fruchterman_reingold

pub fn fruchterman_reingold<F, V>(
    step_fn: F, 
    max_iter: usize, 
    converge_eps: f32, 
    k_r: f32, 
    k_s: f32, 
    min_pos: &V, 
    max_pos: &V, 
    node_positions: &mut [V], 
    node_neighbors: &[Vec<usize>]
) where
    V: Vector<Scalar = f32>,
    F: Fn(usize) -> f32,