Unreal Engine 5 – C++ Plugin – Realtime Camera Transform Data to JSON

/*  
    This C++ script, "VP Camera Recorder", (v2.1.7),  
    is part of a project created by Jonathan DeLeon.

    Copyright (C) 2025 Jonathan DeLeon (contact@JonathanDeLeon.com)

    This script is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This script is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "Camera/CameraComponent.h"
#include "CameraRecorder.generated.h"

USTRUCT(BlueprintType)
struct FRecordedCameraFrame
{
GENERATED_BODY()

UPROPERTY() int32 FrameNumber;
UPROPERTY() FVector Location;
UPROPERTY() FRotator Rotation;
UPROPERTY() float FocalLength;
UPROPERTY() float Timestamp;

FRecordedCameraFrame()
        : FrameNumber(0), Location(FVector::ZeroVector), Rotation(FRotator::ZeroRotator), FocalLength(0.0f), Timestamp(0.0f) {
    }
};

UCLASS()
class GS_VIRTUALPRODSTUDIO_API ACameraRecorder : public AActor
{
GENERATED_BODY()

public:
ACameraRecorder();

protected:
virtual void BeginPlay() override;

public:
virtual void Tick(float DeltaTime) override;

UFUNCTION(BlueprintCallable, Category = "Camera Recording")
void StartRecording();

UFUNCTION(BlueprintCallable, Category = "Camera Recording")
void StopRecording();

UFUNCTION(BlueprintCallable, Category = "Camera Recording")
void SaveToJson();

private:
bool bIsRecording;
    int32 FrameCounter;
float LastRecordedTime;
    TArray<FRecordedCameraFrame> RecordedFrames;
};