gistfile1.rb

  VTM = {
    :dice => 10,
    :critical_failure => 1,
    :critical_success => 10,
    :success => 5
  }

  def calculate_dices(attacker, victim)
    attack_points = attacker.attack_points
    defence_points = victim.defence_points
    attack_bonus = 1
    defence_bonus = 1

    # Считаем считаем наносимые повреждения
    attack = []

    # Бросаем кости
    attack_dices = attack_points.d(VTM[:dice])

    # Выбираем критичные успехи и бросаем на каждый дополнительный кубик
    attack_dices.select { |value| value == VTM[:critical_success] }.each do
      attack_dices << 1.d(VTM[:dice]).to_a
    end

    # Собираем все успешные броски
    attack_dices.each do |value|
      attack.push(value) if value >= VTM[:success]
    end

    # Выбираем критичные неудачи и на каждую вычитаем один успех
    attack_dices.select { |value| value == VTM[:critical_failure] }.each do
      attack.pop
    end

    # Считаем считаем компенсируемые повреждения
    defence = []

    # Бросаем кости
    defence_dices = defence_points.d(VTM[:dice])

    # Выбираем критичные успехи и бросаем на каждый дополнительный кубик
    defence_dices.select { |value| value == VTM[:critical_success] }.each do
      defence_dices << 1.d(VTM[:dice]).to_a
    end

    # Собираем все успешные броски
    defence_dices.each do |value|
      defence.push(value) if value >= VTM[:success]
    end

    # Выбираем критичные неудачи и на каждую вычитаем один успех
    defence_dices.select { |value| value == VTM[:critical_failure] }.each do
      defence.pop
    end

    # Summarize successful dices
    attack  = attack.summarize.to_f * attack_bonus
    defence = defence.summarize.to_f * defence_bonus

    # Make sure that both attack and defence are at least 1
    attack = 1 if attack == 0
    defence = 1 if defence == 0

    logger.debug <<-CODE
      Attack: #{attack_points} * #{attack_bonus} = #{attack} 
      Defence Points: #{defence_points} * #{defence_bonus} = #{defence}
CODE

    attacker_won = (attack >= defence)

    if attacker_won
      attack_damage   = rand(victim.health) * 0.3
      defence_damage  = rand(attack_damage * defence / attack)
    else
      defence_damage  = rand(attacker.health) * 0.3
      attack_damage   = rand(defence_damage * attack / defence)
    end

    return [attacker_won, attack_damage.ceil, defence_damage.ceil]
  end