Struct Simulation 

pub struct Simulation { /* private fields */ }

The world’s state and rules, with no terminal in sight so it can be tested.

Positions are in cells: x along, y down in rows. Rows are twice as tall as cells are wide, so wherever distance matters y is doubled first and a ball is round.

Implementations

impl Simulation

pub fn positions(&self) -> Vec<(f32, f32)>

Where the centre of every ball is, as (column, row).

pub fn resize(&mut self, width: u32, height: u32)

Tells the simulation the window size. Does nothing if it is unchanged.

pub fn step(&mut self, pointer: &Pointer)

Moves everything one frame.

pub fn render(&self, display: &mut Display)

Draws the balls and their trails into display.