Unrecognized type 'FInterval'

Development Programming & Scripting
1

I am declaring a struct as following:

#pragma once

#include "Math/Interval.h"
#include "ChargeSettings.generated.h"

USTRUCT()
struct FChargeSettings
{
    GENERATED_USTRUCT_BODY()

    FChargeSettings();

    UPROPERTY(EditAnywhere, Category = "Charge")
    FInterval Power;
}

This gives me the following error:

Error: In TemporaryUHTHeader_ChargeSettings: Unrecognized type 'FInterval'

I’m not sure why? FInterval is even defined in the Core module, which is used inside my Build.cs.

2

It turned out, that FInterval is not a USTRUCT, and therefore cannot be a UPROPERTY. The only alternative two a Min/Max kind of tuple is FVector2D, but that’s a bit overkill. I ended up storing my min and max values as separate values, as I did not feel the need to create a new USTRUCT for this.

3

In UE 4.14+ You can use Interval data type that shows in inspectors.

#include "Interval.h"

...

UPROPERTY(EditAnywhere, BlueprintReadWrite, AssetRegistrySearchable, Category = "MyCategory", meta = (Tooltip = "My lnteger Range."))
		FInt32Interval MyRange;
...

Then in initialization you can construct your range like this:

MyRange = FInt32Interval();
MyRange.Min = 2;
MyRange.Max = 10;

Same stuff should work for float as well. Look into source for more info. UE4 documentation is the weakest point of this engine… :slight_smile: