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42 lines
3.0 KiB
Plaintext
42 lines
3.0 KiB
Plaintext
Availability:Public
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Title: Unreal Architecture
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Crumbs:%ROOT%, Programming
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Description:Reference to creating and implementing gameplay classes.
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Version: 4.9
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When programming gameplay elements using C++ code, each module can contain many C++ classes.
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[REGION:raw]
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[/REGION]
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Each class defines a template for a new Actor or Object. Within the class header file, the class and any class [functions](Programming\UnrealArchitecture\Reference\Functions) and [properties](Programming\UnrealArchitecture\Reference\Properties)
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are declared. Classes can also contain [structs](Programming\UnrealArchitecture\Reference\Structs), data structures that help with organization and manipulation of related properties. Structures can also be defined on their own.
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[interface](Programming\UnrealArchitecture\Reference\Interfaces) allow additional gameplay behavior to be implemented by different classes.
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When programming with Unreal Engine, it is possible to have standard C++ classes, functions, and variables. These can be defined using standard C++ syntax. However, `UCLASS()`, `UFUNCTION()`, and
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`UPROPERTY()` macros can be used to make Unreal Engine aware of the new classes, functions, and variables. For instance, a variable with a declaration prefaced by a `UPROPERTY()` macro can
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be garbage collected by the engine, and can be displayed and edited within Unreal Editor. There are also `UINTERFACE()` and `USTRUCT()` macros, and keywords for each macro that can be used
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to specify the [class](Programming\UnrealArchitecture\Reference\Classes\Specifiers)'s, [function](Programming\UnrealArchitecture\Reference\Functions\Specifiers)'s, [property](Programming\UnrealArchitecture\Reference\Properties\Specifiers)'s,
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[interface](Programming\UnrealArchitecture\Reference\Interfaces\Specifiers)'s, or [struct](Programming\UnrealArchitecture\Reference\Structs\Specifiers)'s behavior within Unreal Engine and Unreal Editor.
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In addition to the above macros, there is a UPARAM() macro that is primarily used when exposing C++ code to Blueprints. To see examples of UPARAM() being used, see the [](Engine/Blueprints/TechnicalGuide/ExtendingBlueprints) documentation.
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[OBJECT:TopicButtonList]
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[PARAM:icon]
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(convert:false)
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[/PARAM]
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[PARAM:title]
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Gameplay Programming Reference Directory
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[/PARAM]
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[PARAM:description]
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[/PARAM]
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[PARAM:links]
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* [](Programming\UnrealArchitecture\Reference\Classes "%Programming/UnrealArchitecture/Reference/Classes:Description% ")
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* [](Programming\UnrealArchitecture\Reference\Functions "%Programming/UnrealArchitecture/Reference/Functions:Description% ")
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* [](Programming\UnrealArchitecture\Reference\Properties "%Programming/UnrealArchitecture/Reference/Properties:Description% ")
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* [](Programming\UnrealArchitecture\Reference\Structs "%Programming/UnrealArchitecture/Reference/Structs:Description% ")
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* [](Programming\UnrealArchitecture\Reference\Interfaces "%Programming/UnrealArchitecture/Reference/Interfaces:Description% ")
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[/PARAM]
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[/OBJECT]
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