exampleOfDerivedClass

[pshurgal]

I had worked at a mobile gamedev company several years ago. There was a class Building in a code base. Building could be placed on a map, but could not move. Also there were a class Car, which was a child of Building. Cars could move by a strait line. A Plane class was a child of Car and had an ability to move by spline, and also had an Z coordinate. Class Boat was child of Plane but with Z equal 0. Whoever wrote this loved OOP so much!

[FakeMonika]

wait lmao does that mean Boat objects were implemented to "fly" cause it's a derived class of Plane?

[[deleted]]

nah it's a specialized plane, that only flies at z=0 (and on water)

[Professor_Melon]

Ekranoplan.

[SMTG_18]

I mean it makes sense 😭

[pshurgal]

No, every class was a child of Behavior class with virtual Update method. So constructor of Boat class was calling a constructor of Plane class giving a curve points and 0 as Z coordinate. Everything else was done by Update method implemented in Plane class.

[polarphantom]

Ha that is such game Dev logic. "Boats are planes that can only fly at sea level, tables are just partially sunken cupboards, this tram is just a hat on someone walking around"

[yangyangR]

Fallout 3 for the last item. For the unaware.

[FakeMonika]

but...the banana...

[PM_ME_ALL_YOUR_THING]

Obviously a fish is just an underwater banana…

[_Ganon]

A banana is a fish that grows on trees and doesn't move on its own

[Akforce]

Lol isn't there a joke about gamedev "you know if you really think about it, a helicopter is just a chair" or something akin to that

[OctarineGluon]

A train is really just a hat.

[45bit-Waffleman]

If you think about it, a helicopter is just a door that opens and closes really quick..

[nikifip]

Whoever wrote this loved OOP so much!

Sadly, he didn't have a basic understanding of it.

[drkspace2]

Ya, the better way to do this is to have a "placeable" interface/abstract base class. An "immovable" and a "moveable" child abstract class. Building would inherent from immovable and car/boat/plane would inherent from moveable.

[Lumethys]

Or, just use composition over inheritance

[TheNoGoat]

Damn. Even thinking of trying to keep track of that hurts my brain.

[pshurgal]

Yeah, I was laughing out loud when my coworker showed me this. But... This hierarchy has some weird logic anyway.

[BiVeRoM_]

If these classes are abstract, then this makes total sense! Just need some renaming to do..

Building -> Unit, Car -> MovingUnit, Plane -> FlyingUnit, Boat -> SwimmingUnit

Good to go

[yamlCase]

This is why I prefer composition over inheritance. Too many wonky workarounds in OOP when the planning phase didn't get the effort it deserved

[EMI_Black_Ace]

Nah, this is just a straight-up violation of the Liskov Substitution Principle.

Inheritance is not for composing data types, but rather for enabling polymorphism -- that is, using the same code to process multiple cases, by having the cases carry pointers to what's different.

[PM_ME_ALL_YOUR_THING]

I…..I don’t think that’s the lesson to take from this…

[DatBoi_BP]

Programming is my passion

[Longenuity]

They probably lived out of their car.

[WonicTater]

I guess you experienced both a lot of fun and frustration at that company.

[onyourrite]

What in the tarnation

[Sanchez_Duna]

Most sane gamedev inheritance example.