Can someone explain what is wrong with this code please?

Development Programming & Scripting C++
1

Straight up, I don’t have a great understanding of C++. I found a solution I really need for locating the frustum edges of my ortho camera, but when I include it in my project, it fails to rebuild with an MSB3073 error (meaning I can no longer start the editor). I have no idea why.

The code:

CameraUtils.h


#pragma once

#include "Camera/CameraActor.h"
#include "CameraUtils.generated.h"

/**
 * 
 */
UCLASS()
class PROJECTNAME_API ACameraUtils : public ACameraActor
{
    GENERATED_BODY()


public:

    UFUNCTION(BlueprintPure,
        meta = (
            DisplayName = "Get Camera Edges from Frustum",
            Keywords = "Camera Edges Frustum"
            ),
        Category = "Camera|Utility")
        static void GetCameraFrustumEdges(UCameraComponent* camera, FVector& topCenter, FVector& leftCenter, FVector& bottomCenter, FVector& rightCenter);


};

CameraUtils.cpp


#include "ProjectName.h"
#include "CameraUtils.h"


void ACameraUtils::GetCameraFrustumEdges(UCameraComponent* camera, FVector& topCenter, FVector& leftCenter, FVector& bottomCenter, FVector& rightCenter)
{
    // Assumptions: Camera is orthographic, Z axis is upwards, Y axis is right, X is forward

    FMinimalViewInfo cameraView;
    camera->GetCameraView(0.0f, cameraView);

    float width = cameraView.OrthoWidth;
    float height = width / cameraView.AspectRatio;

    topCenter.Set(cameraView.Location.X,
                  cameraView.Location.Y,
                  cameraView.Location.Z + height/2.0f);

    bottomCenter.Set(cameraView.Location.X,
                     cameraView.Location.Y,
                     cameraView.Location.Z - height / 2.0f);

    leftCenter.Set(cameraView.Location.X,
                   cameraView.Location.Y - width / 2.0f,
                   cameraView.Location.Z);

    rightCenter.Set(cameraView.Location.X,
                    cameraView.Location.Y + width / 2.0f,
                    cameraView.Location.Z);

}

Firstly, I have changed #include “ProjectName.h” to my actual project name when trying this.
Secondly, on trying to figure out what’s going wrong VS15 is telling me that I need to declare GetCameraFrustumEdges in CameraUtils.h, but I am doing so… I don’t get it. Can someone help me please?

2

Are you breaking up your UFUNCTION macro into multiple lines? Iirc, that ain’t gonna fly with the Unreal Build Tool. Keep it all on one line i.e.

UFUNCTION(BlueprintPure, meta = (DisplayName = “Get Camera Edges from Frustum”,Keywords = “Camera Edges Frustum”), Category = “Camera|Utility”)

Not sure if that’s it, but I’ve had that break things for me before.

3
4

Oh you absolute KINGS AMONGST MEN… Thank you! Gracias! Merci! Danke! :smiley:

5

I love you guys so much right now :smiley:

Code working, both in terms of loading and actually doing as needed… hours of frustration over…