tests/test_prog/rpg/combat.nit

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   3 # Licensed under the Apache License, Version 2.0 (the "License");
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   9 # Unless required by applicable law or agreed to in writing, software
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  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # COmbat interactions between characters.
  16 module combat
  17
  18 import character
  19
  20 # Something that can be used to attack someone and inflict damage.
  21 interface Weapon
  22         # Damage per second inflicted by this weapon.
  23         fun dps: Float is abstract
  24 end
  25
  26 # Something that can be combatted, it can `attack` and `defend`.
  27 #
  28 # World items can also be `Combatable`.
  29 # `defend` method is then used to determines how the object react to an attack
  30 # Some magical items can even `attack`.
  31 interface Combatable
  32         fun hit_points: Int is abstract
  33
  34         # A `Combatable` can attack a `target` that is also a `Combatable`.
  35         #
  36         # Attack the `target` using `wepaon` and returns the number of inflicted hit points.
  37         fun attack(target: Combatable, weapon: Weapon): Int is abstract
  38
  39         # Like `attack` but cannot be defended.
  40         fun direct_attack(target: Combatable, weapon: Weapon): Int is abstract
  41
  42         # `Combatable` can defend against attacks.
  43         #
  44         # Defends against a number of received hit points and return the number of pared hit points.
  45         #
  46         # @param hit: damage received.
  47         fun defend(hit: Int): Int is abstract
  48
  49         # Is the character still have hit_points?
  50         fun is_dead: Bool do return hit_points > 0
  51 end
  52
  53 # Characters are now `Comabatable`
  54 redef class Character
  55         super Combatable
  56
  57         # Use character `health` to determines hit_points.
  58         redef fun hit_points do return health
  59 end
  60
  61 # Dwarves can be used as weapons.
  62 redef class Dwarf
  63         super Weapon
  64
  65         # Dwarf `dps` are based on the dwarf `base_endurance` (represents weight here)
  66         redef fun dps do return base_endurance.to_f / 10.0
  67 end