Struct LayoutState 

pub struct LayoutState {
    pub pos: Vec<[f32; 2]>,
    pub vel: Vec<[f32; 2]>,
}

The mutable layout state: one position + velocity per node (the ping-pong the GPU iterates in VRAM; here, the CPU mirror). Positions are the DATA a test reads.

Fields

pos: Vec<[f32; 2]>

vel: Vec<[f32; 2]>

Implementations

impl LayoutState

pub fn seed(n: usize, scale: f32) -> Self

The deterministic seed: a golden-angle (sunflower) spiral of radius scale, zero velocity. No RNG ⇒ the whole sim is reproducible (FC-7).

pub fn kinetic_energy(&self) -> f32

Total kinetic energy Σ |vᵢ|² — the convergence metric: a settling layout’s energy decays toward zero (read it as DATA to prove it converged).

pub fn total_edge_len(&self, g: &GraphCsr) -> f32

Total edge length over g — the layout-quality metric the FDEB / structure tests read (connected nodes pulled together shrink this).

Trait Implementations

impl Clone for LayoutState

fn clone(&self) -> LayoutState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LayoutState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for LayoutState

fn eq(&self, other: &LayoutState) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for LayoutState