ActionCondition()

override bool ActionBuildPartHandsGeneric::ActionCondition	(	PlayerBase	player,
		ActionTarget	target,
		ItemBase	item )

См. определение в файле ActionBuildPart.c строка 434

        {
            if (!PositioningCheck(player, target))
                return false;
            
            if (MiscGameplayFunctions.ComplexBuildCollideCheckClient(player, target, item, m_VariantID))
                return GatherInfoData(player,target,item);
            
            return false;
        }
        return true;
    }
    
    override bool ActionConditionContinue(ActionData action_data)
    {
        EntityAI ent = EntityAI.Cast(action_data.m_Target.GetObject());
        ConstructionBase construction = ConstructionBase.Cast(ent.GetConstructionBasic());
        string part_name = BuildPartActionData.Cast(action_data).m_PartType;
        CollisionCheckData check_data = new CollisionCheckData;
        
        check_data.m_PartName = part_name;

Перекрестные ссылки GatherInfoData(), m_VariantID и PositioningCheck().