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  3. UThumbnailRenderer

UThumbnailRenderer

This is an abstract base class that is used to define the interface that UnrealEd will use when rendering a given object's thumbnail.

Unreal Engine C++ API Reference > Editor > UnrealEd > ThumbnailRendering

Inheritance Hierarchy

References

   
Module UnrealEd
Header /Engine/Source/Editor/UnrealEd/Classes/ThumbnailRendering/ThumbnailRenderer.h
Include #include "ThumbnailRendering/ThumbnailRenderer.h"

Syntax

UCLASS (Abstract, MinimalAPI)  
class UThumbnailRenderer : public UObject

Remarks

This is an abstract base class that is used to define the interface that UnrealEd will use when rendering a given object's thumbnail. The editor only calls the virtual rendering function.

Constructors

  Type Name Description
Public function  

UThumbnailRenderer ( const FObjectInitializer& ObjectInitializer
)

  

Functions

  Type Name Description
Public function Virtual Const bool Checks to see if the specified asset supports realtime thumbnails, which will cause them to always be rerendered to reflect any changes made to the asset.
Public function Virtual bool Returns true if the renderer is capable of producing a thumbnail for the specified asset.
Public function Virtual void

Draw ( UObject* Object,
int32 X,
int32 Y,
uint32 Width,
uint32 Height,
FRenderTarget* Viewport,
FCanvas* Canvas
)

 Draws a thumbnail for the object that was specified.
Public function Virtual void

Draw ( UObject* Object,
int32 X,
int32 Y,
uint32 Width,
uint32 Height,
FRenderTarget* Viewport,
FCanvas* Canvas,
bool bAdditionalViewFamily
)

 Draws a thumbnail for the object that was specified.
Public function Virtual Const EThumbnailRenderFrequency Override this method to control the render frequency for thumbnails in your editor Generally speaking you should use Realtime if you want an animated thumbnail, but if not it is expensive to use (per-frame draws) If not using realtime, the next best default is OnAssetSave, which updates the thumbnail only save.
Public function Virtual Const void

GetThumbnailSize ( UObject* Object,
float Zoom,
uint32& OutWidth,
uint32& OutHeight
)

 Calculates the size the thumbnail would be at the specified zoom level
Protected function Static FGameTime

GetTime ()

  
Protected function Static void

RenderViewFamily ( FCanvas* Canvas,
FSceneViewFamily* ViewFamily
)

  
Protected function Static void

RenderViewFamily ( FCanvas* Canvas,
FSceneViewFamily* ViewFamily,
FSceneView* View
)

 Renders the thumbnail's view family.

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