Difference between revisions of "Intermediate C++ Game Programming Tutorial 18"
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=== Part 2 === | === Part 2 === | ||
* Using inheritance and composition together | * Using inheritance and composition together | ||
| + | * Basic idea of a polymorphic state machine and its application to entity behavior | ||
== Video Timestamp Index == | == Video Timestamp Index == | ||
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* Forgot the virtual destructor for <code>class Weapon</code>! (this one hurts) | * Forgot the virtual destructor for <code>class Weapon</code>! (this one hurts) | ||
* In the children, the function signatures should be: <code>int CalculateDamage( const Attributes& attr,Dice& d ) const override</code> | * In the children, the function signatures should be: <code>int CalculateDamage( const Attributes& attr,Dice& d ) const override</code> | ||
| − | * 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) | + | * Though not technically an error, it might have been a better decision to make <code>Weapon::GetName()</code> and <code>Weapon::GetRank()</code> (pure) virtual functions (this would reduce the amount of per-instance data to just the vtable ptr) |
== See also == | == See also == | ||
* [[Intermediate C++ Game Programming Tutorial 19|Next in series (Tutorial 19)]] | * [[Intermediate C++ Game Programming Tutorial 19|Next in series (Tutorial 19)]] | ||
* [[Intermediate C++ Game Programming Series]] | * [[Intermediate C++ Game Programming Series]] | ||
Revision as of 11:21, 13 December 2017
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.
Contents
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
Source Code
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()andWeapon::GetRank()(pure) virtual functions (this would reduce the amount of per-instance data to just the vtable ptr)
