Multiple Movement Modifier

lib/classes/movement_parameters.gd

@@ -27,12 +27,12 @@ export var debug_name :String
 func modify(_movement_parameters :MovementParameters):
 	pass
 
-func apply_multiple_modifiers( _modifiers: Array):
+func apply_multiple_modifiers( _modifiers: Array, _movement_direction :Vector2):
 	for m in _modifiers:
 		if m is StateModifierMovement:
-			apply_state_modifier(m)
+			apply_state_modifier(m, _movement_direction)
 
-func apply_state_modifier(_modifier :StateModifierMovement):
+func apply_state_modifier(_modifier :StateModifierMovement, _movement_direction :Vector2):
 	#_modifier.direction == _modifier.APPLIED_DIRECTIONS.LEFT_OR_UP
 	match _modifier.modifier_type:
 		StateModifierMovement.SUB_TYPE.NEGATIVE_CONSTRAINT:

lib/classes/movement_state_receiver.gd

@@ -153,9 +153,9 @@ func apply_state_modifier(movement_parameters :MovementParameters) -> MovementPa
 #			movement_parameters.apply_state_modifier(modifier)
 
 	var active_mods :bool= true
-	var mods :Array = get_state_machine_modifiers.call_func('StateModifierMovement', active_mods)
+	var mods :Array = get_state_machine_modifiers.call_func('StateModifierMovement', active_mods, current_state.is_grounded)
 	if (mods.size() > 0):
-		movement_parameters.apply_multiple_modifiers(mods)
+		movement_parameters.apply_multiple_modifiers(mods, Vector2(0,0))
 	return movement_parameters
 
 

lib/classes/state_machine.gd

@@ -77,11 +77,16 @@ func merge_modifiers():
 				this_mod_type.merge(m)
 
 ## When trying to get multiple modifiers
-func get_modifiers_of_type(_modifier_type :String, _only_active: bool = false) -> Array:
+func get_modifiers_of_type(_modifier_type :String, 
+		_only_active: bool = false, 
+		_first_condition :bool = true,
+		_second_condition :bool = true) -> Array:
 	var mod_array :Array = []
 	for m in state_modifiers:
 		if m.to_string() == _modifier_type:
 			if (_only_active and m.is_active) or _only_active == false:
+				## invoke additional status checks if they're implemented for this modifier
+				if m.status_check_1(_first_condition) and m.status_check_2(_first_condition):
 					mod_array.append(m)
 	return mod_array
 

lib/classes/state_modifier.gd

@@ -114,6 +114,11 @@ func copy(_copy_state: StateModifier):
 	name = _copy_state.name
 	modifier_type = _copy_state.modifier_type
 
+func status_check_1(condition :bool) -> bool:
+	return true
+
+func status_check_2(condition :bool) -> bool:
+	return true
 
 func merge(_merge_from_modifier: StateModifier):
 	pass

lib/classes/state_modifier_movement.gd

@@ -59,6 +59,16 @@ func copy(_copy_state: StateModifier):
 		_copy_state.horizontal_speed = horizontal_speed
 		_copy_state.horizontal_acceleration = horizontal_acceleration
 
+## Overrident to check whether this state is a grounded and this modifier 
+## should only apply while in the air.
+func status_check_1(condition :bool) -> bool:
+	var is_grounded :bool = condition
+	if only_grounded == true and is_grounded == false:
+		return false
+	else:
+		return true 
+
+
 func merge(_merge_from_modifier: StateModifier):
 	.merge(_merge_from_modifier)
 	is_active = _merge_from_modifier.is_active