derpbot9000.rb

class Derpbot9000 < RTanque::Bot::Brain
  NAME = 'derpbot9000'
  include RTanque::Bot::BrainHelper
  TURRET_FIRE_RANGE = RTanque::Heading::ONE_DEGREE * 1.0

  def tick!
    turn_randomly
    command.speed = MAX_BOT_SPEED
    if (target = self.nearest_target)
      self.fire_upon(target)
    else
      self.detect_targets
    end
  end

  def fire_upon(target)
    self.command.radar_heading = target.heading
    self.command.turret_heading = target.heading
    if self.sensors.turret_heading.delta(target.heading).abs < TURRET_FIRE_RANGE
      self.command.fire(1)
    end
  end

  def nearest_target
    self.sensors.radar.min { |a,b| a.distance <=> b.distance }
  end

  def detect_targets
    self.command.radar_heading = self.sensors.radar_heading + MAX_RADAR_ROTATION
    self.command.turret_heading = self.sensors.heading + RTanque::Heading::HALF_ANGLE
  end

  def turn_randomly
    @ticker ||= 0
    options = [0.1, 0.0, -0.1] 
    @offset ||= options.sample

    if sensors.ticks > @ticker
      # set a new turn direction: left, right, or straight
      @offset = options.sample
      @ticker = @ticker + rand(120) + 120
    end

    new_heading = sensors.heading.radians + @offset
    command.heading = RTanque::Heading.new(new_heading)
  end
end