require 'toxiclibs'
require_relative 'attractor'
require_relative 'particle'

attr_reader :particles, :attractor, :physics

def settings
  size 640, 360
end

def setup
  sketch_title "Attract Repel"
  @physics = Physics::VerletPhysics2D.new
  physics.setDrag(0.01)
  @particles = (0..50).map { Particle.new(TVec2D.new(rand(width), rand(height))) }
  @attractor = Attractor.new(TVec2D.new(width / 2, height / 2))
end

def draw
  background(255)
  physics.update
  attractor.display
  particles.each(&:display)
  if mouse_pressed?
    attractor.lock
    attractor.set(mouse_x, mouse_y)
  else
    attractor.unlock
  end
end