How to match FOV of Sequencer Camera Actor to FOV of PIE Camera Actor

Development Rendering
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1

Hi,​

I spawned a camera in PIE to make a sequence the same FOV of PIE. But I found that FOV of PIE camera(left side in the figure) is different to FOV of spawned Camera Actor(right side).

Could you please tell me how to match FOV of Camera in the sequencer to FOV of the PIE camera?

Thanks

Yiwen

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2

Hi There,

You can match the CineCamera view to the Editor Viewport by adjusting the values of FieldOfView, Filmback Sensor width and height and the Min and Max settings of the Lens Focal Length.

These values have a relationship to the viewport. For example if the viewport has an aspect ratio of 1.3, a CineCamera can approximate this view by setting :

  • FOV to 90
  • Filmback SensorWidth and SensorHeight to values having the same aspect ratio
  • Lens Min and Max Focal length using the equation for focal length e.g. (Filmback.SensorWidth /2 ) / FMath::Tan(FMath::DegreesToRadians( FOV / 2.f));

`float EditorAspecRatio = (GCurrentLevelEditingViewportClient->Viewport->GetSizeXY().X * 1.0) / GCurrentLevelEditingViewportClient->Viewport->GetSizeXY().Y;

float EditorSensorHeight = 20;
GetCineCameraComponent()->Filmback.SensorWidth = editorSensorHeight * editorAspecRatio;
GetCineCameraComponent()->Filmback.SensorHeight = editorSensorHeight ;

float EditorCurrentFocalLength = (GetCineCameraComponent()->Filmback.SensorWidth /2 ) / FMath::Tan(FMath::DegreesToRadians(EditorCameraFieldOfView / 2.f));
GetCineCameraComponent()->LensSettings.MinFocalLength = EditorCurrentFocalLength;
GetCineCameraComponent()->LensSettings.MaxFocalLength = EditorCurrentFocalLength;
GetCineCameraComponent()->SetFieldOfView( EditorCameraFieldOfView );`Also, make sure to select appropriate values for ‘Constrain Aspect Ratio’ and FOV 'Aspect Ratio Axis Constraint '. These values will need adjusted for different viewport sizes as the effective field of view is affected by the viewport size.