fp: Wire up attack chaining

feely_pona_game.cpp

@@ -421,3 +421,31 @@ static Dqn_Rect FP_Game_CalcEntityWorldBoundingBox(FP_Game *game, FP_GameEntityH
     Dqn_Rect result = FP_Game_CalcEntityArrayWorldBoundingBox(game, &handle, 1);
     return result;
 }
+
+// Transition the action into the desire state and set the flag to indicate it
+// has just transitioned
+static void FP_Game_EntityActionSetState(FP_GameEntityAction *action, FP_GameEntityState state)
+{
+    if (!action)
+        return;
+    action->state  = state;
+    action->flags |= FP_GameEntityActionFlag_StateTransition;
+}
+
+// Reset the timers and animation for the current action and set the duration
+// for the new action.
+static void FP_Game_EntityActionReset(FP_GameEntityAction *action, Dqn_f32 new_action_duration, TELY_AssetSpriteAnimation *anim)
+{
+    if (!action)
+        return;
+    action->anim      = anim;
+    action->timer_s   = 0.f;
+    action->end_at_s  = new_action_duration;
+    action->flags     = 0;
+}
+
+static bool FP_Game_EntityActionHasFailed(FP_GameEntityAction const *action)
+{
+    bool result = action ? action->flags & FP_GameEntityActionFlag_Failed : true;
+    return result;
+}