Intermediate C++ Game Programming Tutorial 18 - Revision history

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 * The performance impact of using Virtual Functions [https://youtu.be/cdOB_gKnJOM?t=19m36s 19:36]
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-** The direct impact: If you use virtual functions in a class, all objects of that class will have to store a (hidden) pointer to a virtual function table ("v-table")
+** The direct impact: If you use virtual functions in a class, all objects of that class will have to store a (hidden) pointer to a virtual function table ("vtable")
 ** The v-table holds pointers to code for each virtual function supported by the object. It is used as a lookup table to determine which functions are being called at runtime
 ** An indirect impact: because the compiler does not know which function will be called at runtime, it can't inline any virtual functions that are being dynamically bound

@@ Line 111: / Line 111: @@
 ** In theory, virtual functions would be nicer, as you could swap out different effects dynamically at runtime (can't do that with a functor).
 ** However, in that scenario the use of virtual functions would introduce performance issues
-** The choice depends on the estimated frequency of function calls (relevant when greater than O(1E6 calls/second)
+** The choice depends on the estimated frequency of function calls (relevant when greater than O(1E6) calls/second)
 </div>
 </div>

@@ Line 92: / Line 92: @@
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 * Presenting the template class <code>Behavior</code> within the class <code>Entity</code> [https://youtu.be/cdOB_gKnJOM?t=15m22s 15:22]
-* How to transtion between behavioral states? [https://youtu.be/cdOB_gKnJOM?t=16m35s 16:35]
+* How to transition between behavioral states? [https://youtu.be/cdOB_gKnJOM?t=16m35s 16:35]
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 ** Associate each state with a stack of successor states that are consecutively called

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 * [[Intermediate C++ Game Programming Tutorial 19|Next in series (Tutorial 19)]]
 * [[Intermediate C++ Game Programming Series]]
-* [[RPG Project Twin|RPG Project Twin (concrete examples of design implementations of polymorphism start at Tutorial 13)]]
+* [[RPG Project Twin]]

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 ** The SpriteEffect system (see [[Intermediate C++ Game Programming Tutorial 14|Intermediate Tutorial 14]]) uses functors to define drawing behavior. These functors are called on heavily as they contain PutPixel calls
-** In theory, virtual functions would be nicer, as you could swap out different effects dynamically at runtime (can't do that with functors).
+** In theory, virtual functions would be nicer, as you could swap out different effects dynamically at runtime (can't do that with a functor).
 ** However, in that scenario the use of virtual functions would introduce performance issues
 ** The choice depends on the estimated frequency of function calls (relevant when greater than O(1E6 calls/second)

@@ Line 106: / Line 106: @@
 ** The difference in performance is generally not problematic, except for specific (rare) cases
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-* An example of where performance actually matters: The SpriteEffect system using functors that are called on heavily as they contain PutPixel calls [https://youtu.be/cdOB_gKnJOM?t=21m07s 21:07]
+* An example of where performance actually matters: The SpriteEffect system [https://youtu.be/cdOB_gKnJOM?t=21m07s 21:07]
 <div class="mw-collapsible-content">
 ** In theory, virtual functions would be nicer, as you could swap out different effects dynamically at runtime (can't do that with functors).
 ** However, in that scenario the use of virtual functions would introduce performance issues

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 * [[Intermediate C++ Game Programming Tutorial 19|Next in series (Tutorial 19)]]
 * [[Intermediate C++ Game Programming Series]]
-* [[RPG Project Twin]] (concrete examples of design implementations of polymorphism start at episode 13)
+* [[RPG Project Twin|RPG Project Twin (concrete examples of design implementations of polymorphism start at episode 13)]]