Rework how unit effects work, enabling push/pull

README.md

@@ -6,7 +6,6 @@ This is a work in progress engine for Maleghast, whose main goal currently inclu
 
 Currently missing core mechanics include:
 - Hazards
-- Pushing/Pulling
 - LoS blocking
 - Tyrants
 - Thralls

src/Units/Carcass.hs

@@ -19,7 +19,7 @@ import GameModel
 import Units.Components
   ( AttackT(..)
   , anyTarget
-  , buildAttack
+  , buildAttack, inflictTokens
   )
 
 gunwight :: BaseStats
@@ -49,7 +49,7 @@ gunwightActions =
     , tMelee           = False
     , tDamageType      = Unblockable
     , tDamageAmount    = 2
-    , tHeadshotEffects = [InflictTokens VitalVulnr (-1)]
+    , tHeadshotEffects = [inflictTokens VitalVulnr (-1)]
     , tStandardEffects = []
     }
   ]

src/Units/Components.hs

@@ -1,9 +1,13 @@
 module Units.Components
   ( AttackT(..)
+  , ProtoEffect
   , anyTarget
   , buildAttack
   , SelfAbilityT(..)
   , mkSelfAbility
+  , inflictTokens
+  , push
+  , pull
   )
   where
 
@@ -14,12 +18,15 @@ import GameModel
   , Choice
   , DamageType
   , Effect(..)
-  , mkChoice
+  , mkChoice, Token, forcedMove, ForcedMoveType (..), owner
   )
-import Util ((??))
 
 import Numeric.Natural (Natural)
 
+-------------------------
+-- Attacks & Abilities --
+-------------------------
+
 data AttackT = AttackT
   { tName            :: String
   , tRange           :: (Natural, Natural)
@@ -27,8 +34,8 @@ data AttackT = AttackT
   , tMelee           :: Bool
   , tDamageType      :: DamageType
   , tDamageAmount    :: Natural
-  , tHeadshotEffects :: [CharacterIdentifier -> Effect]
+  , tHeadshotEffects :: [ProtoEffect]
-  , tStandardEffects :: [CharacterIdentifier -> Effect]
+  , tStandardEffects :: [ProtoEffect]
   }
 
 anyTarget :: BoardState -> CharacterIdentifier -> Bool
@@ -37,15 +44,37 @@ anyTarget = const $ const True
 buildAttack :: AttackT -> CharacterIdentifier -> Choice
 buildAttack (AttackT {..}) attacker = mkChoice tName [targetEffect]
   where
-    attackDetails =
+    attackDetails target = Attack
-      Attack <$> sequence tHeadshotEffects ?? tMelee <*> sequence tStandardEffects ?? tDamageType ?? tDamageAmount
+      ((sequence $ sequence tHeadshotEffects attacker) target)
+      tMelee
+      ((sequence $ sequence tStandardEffects attacker) target)
+      tDamageType
+      tDamageAmount
     attackEffect target = [ResolveAttack attacker (attackDetails target) target]
     targetEffect = Target attacker tRange tValidTargets attackEffect
 
 data SelfAbilityT = SelfAbilityT
   { tName    :: String
-  , tEffects :: [CharacterIdentifier -> Effect]
+  , tEffects :: [ProtoEffect]
   }
 
 mkSelfAbility :: SelfAbilityT -> CharacterIdentifier -> Choice
-mkSelfAbility (SelfAbilityT {..}) = mkChoice tName <$> sequence tEffects
+mkSelfAbility (SelfAbilityT {..}) cid = mkChoice tName (sequence (sequence tEffects cid) cid)
+
+-----------------------------
+--------- Effects -----------
+-----------------------------
+
+type ProtoEffect = CharacterIdentifier -> CharacterIdentifier -> Effect
+
+inflictTokens :: Num n => Token n -> n -> ProtoEffect
+inflictTokens tokenType tokenCount _ = InflictTokens tokenType tokenCount
+
+genericShift :: ForcedMoveType -> Natural -> ProtoEffect
+genericShift fmType amount puller = forcedMove fmType amount (owner puller) (Left puller)
+
+push :: Natural -> ProtoEffect
+push = genericShift Push
+
+pull :: Natural -> ProtoEffect
+pull = genericShift Pull

src/Units/Debug.hs

@@ -21,7 +21,7 @@ import Units.Components
   , anyTarget
   , buildAttack
   , SelfAbilityT(..)
-  , mkSelfAbility
+  , mkSelfAbility, inflictTokens, pull, push
   )
 import Lens.Micro
 
@@ -63,7 +63,7 @@ basicActions =
     , tDamageType      = BasicDamage
     , tDamageAmount    = 0
     , tHeadshotEffects = []
-    , tStandardEffects = [InflictTokens VitalVulnr (-1)]
+    , tStandardEffects = [inflictTokens VitalVulnr (-1)]
     }
   , buildAttack $ AttackT
     { tName            = "Slime"
@@ -73,7 +73,7 @@ basicActions =
     , tDamageType      = BasicDamage
     , tDamageAmount    = 0
     , tHeadshotEffects = []
-    , tStandardEffects = [InflictTokens SpeedSlow (-1)]
+    , tStandardEffects = [inflictTokens SpeedSlow (-1)]
     }
   , buildAttack $ AttackT
     { tName            = "Nerf"
@@ -83,7 +83,7 @@ basicActions =
     , tDamageType      = BasicDamage
     , tDamageAmount    = 0
     , tHeadshotEffects = []
-    , tStandardEffects = [InflictTokens StrWeak (-1)]
+    , tStandardEffects = [inflictTokens StrWeak (-1)]
     }
   , buildAttack $ AttackT
     { tName            = "Yoink"
@@ -93,19 +93,29 @@ basicActions =
     , tDamageType      = BasicDamage
     , tDamageAmount    = 0
     , tHeadshotEffects = []
-    , tStandardEffects = [forcedMove Pull 3 Min (Left (Max, 1))]
+    , tStandardEffects = [pull 3]
+    }
+  , buildAttack $ AttackT
+    { tName            = "Yeet"
+    , tRange           = (1, 4)
+    , tValidTargets    = anyTarget
+    , tMelee           = False
+    , tDamageType      = BasicDamage
+    , tDamageAmount    = 0
+    , tHeadshotEffects = []
+    , tStandardEffects = [push 3]
     }
   , mkSelfAbility $ SelfAbilityT
     { tName            = "Calcify"
-    , tEffects         = [InflictTokens VitalVulnr 1]
+    , tEffects         = [inflictTokens VitalVulnr 1]
     }
   , mkSelfAbility $ SelfAbilityT
     { tName            = "Zoomify"
-    , tEffects         = [InflictTokens SpeedSlow 1]
+    , tEffects         = [inflictTokens SpeedSlow 1]
     }
   , mkSelfAbility $ SelfAbilityT
     { tName            = "Get String"
-    , tEffects         = [InflictTokens StrWeak 1]
+    , tEffects         = [inflictTokens StrWeak 1]
     }
   ]