UKismetRenderingLibrary::ReadRenderTargetUV
#include "Kismet/KismetRenderingLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintCallable
Description
Reads a single pixel from a render target using normalized UV [0,1]x[0,1] coordinates, returning it as an 8-bit sRGB FColor.
Caveats & Gotchas
- • Same performance warning as ReadRenderTargetPixel — this is described as "incredibly inefficient and slow" in the engine source; avoid calling it per-frame.
- • U and V are not clamped for you before use; passing values outside [0,1] samples outside the target's bounds and produces undefined results.
- • As with the pixel-coordinate variant, LDR targets are treated as sRGB and HDR targets as linear before conversion to the returned sRGB FColor.
Signature
static FColor ReadRenderTargetUV(UObject* WorldContextObject, UTextureRenderTarget2D* TextureRenderTarget, float U, float V);Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| WorldContextObject | UObject* | Object used to resolve the current world. | — |
| TextureRenderTarget | UTextureRenderTarget2D* | The render target to sample from. | — |
| U | float | Normalized horizontal coordinate in the [0,1] range. | — |
| V | float | Normalized vertical coordinate in the [0,1] range. | — |
Return Type
FColor Example
Sample the center pixel by UV C++
FColor CenterColor = UKismetRenderingLibrary::ReadRenderTargetUV(this, HeightmapRT, 0.5f, 0.5f);Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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