Difference between revisions of "Intermediate C++ Game Programming Tutorial 18"

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(Video Timestamp Index)
(Video Timestamp Index)
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== Video Timestamp Index ==
 
== Video Timestamp Index ==
 
[https://www.youtube.com/watch?v=4Vvc1YurUYA Tutorial 18.1]
 
[https://www.youtube.com/watch?v=4Vvc1YurUYA Tutorial 18.1]
* Create free function that calls <code>SpecialMove()</code> on the instances of derived classes [https://youtu.be/4Vvc1YurUYA?t=1m17s 0:23]
+
* Create a free function that calls <code>SpecialMove()</code> on the instances of derived classes of MemeFighter [https://youtu.be/4Vvc1YurUYA?t=1m17s 0:23]
  
 
[https://youtu.be/cdOB_gKnJOM Tutorial 18.2]
 
[https://youtu.be/cdOB_gKnJOM Tutorial 18.2]

Revision as of 03:25, 12 October 2019

Another two-parter here, and we got the real stuff now. Virtual functions allow you to unlock the true potential of inheritance in C++. You need to know this shit.

Topics Covered

Part 1

  • How to create a virtual function
  • Using the override keyword
  • Creating a pure virtual function
  • Using a container of pointers to manage a heterogeneous collection of objects
  • virtual destructors

Part 2

  • Using inheritance and composition together
  • Basic idea of a polymorphic state machine and its application to entity behavior

Video Timestamp Index

Tutorial 18.1

  • Create a free function that calls SpecialMove() on the instances of derived classes of MemeFighter 0:23

Tutorial 18.2

  • WORK-IN-PROGRESS

Source Code

Inheritance Github Repository

Errata

  • Forgot the virtual destructor for class Weapon! (this one hurts)
  • In the children, the function signatures should be: int CalculateDamage( const Attributes& attr,Dice& d ) const override
  • Though not technically an error, it might have been a better decision to make Weapon::GetName() and Weapon::GetRank() (pure) virtual functions (this would reduce the amount of per-instance data to just the vtable ptr)

See also