pub fn bounce(
  entity: entity.Entity,
  bounds: Bounds,
) -> entity.Entity

pub fn clamp_x(x: Float, radius: Float, bounds: Bounds) -> Float

pub const genuine_impact_velocity: Float

pub fn resolve_axis(
  position: Float,
  velocity: Float,
  min: Float,
  max: Float,
  on_low: fn(Float) -> Float,
  on_high: fn(Float) -> Float,
) -> #(Float, Float)

pub fn resolve_high_only(
  position: Float,
  velocity: Float,
  max: Float,
  on_high: fn(Float) -> Float,
) -> #(Float, Float)

pub const restitution: Float

pub fn x_fraction(world_x: Float, bounds: Bounds) -> Float

pub fn x_from_canvas_pixel(
  pixel_x: Float,
  canvas_width: Float,
  bounds: Bounds,
) -> Float

pub fn y_fraction_from_top(
  world_y: Float,
  bounds: Bounds,
) -> Float