Game Development Patterns and Best Practices

The trouble with using a factory for game objects

In Chapter 5, Decoupling Code via the Factory Method Pattern we learned how to use a Dynamic Factory to decouple our stages, components, and objects from higher level modules. We did this by placing the dependencies of each derived class into a separate builder class instead of a high-level module. Let's look at an example of creating a derived type stage builder:

//SplashStageBuilder.h-------------------- #include "M5StageBuilder.h"  class SplashStageBuilder: public M5StageBuilder { public:   virtual M5Stage* Build(void); };  //SplashStageBuilder.cpp-------------------- #include "SplashStageBuilder.h" #include "SplashStage.h"  M5Stage* SplashStageBuilder::Build(void) {  return new SplashStage(); ...