Calculate the field of view for a camera to draw on the map

[BrMisha]

Hello!
I have a camera installed on a drone and need to draw a field of view on the map.

So, i have next data:

1. Angle of a camera lens and a current zoom.
2. Coordinate of a camera.
3. Tilt and pan of a camera.
4. Altitude (sea level) of a ground.

Has Qt some components to calculate a FOV in my case?

Thanks!

[Pl45m4]

@BrMisha said in Calculate the field of view for a camera to draw on the map:

Has Qt some components to calculate a FOV in my case?

It's called math :)

In Qt 3D you can get the current field of view from your virtual camera, but for a real camera with real data you have to calculate it by yourself.

There are a lot of guides that show how to achieve this. And you know all parameters you need to make these calculations (camera/lens specs etc.)

• https://www.scantips.com/lights/fieldofviewmath.html
• https://www.scantips.com/lights/fieldofview.html

[BrMisha]

@Pl45m4 Thanks for reply. I found many Qt classes with methods "fieldOfView". Those will not help for me?

[Pl45m4]

@BrMisha said in Calculate the field of view for a camera to draw on the map:

I found many Qt classes with methods "fieldOfView". Those will not help for me?

These are most likely Qt 3D / QML classes for virtual /rendered scenes with a virtual camera to manage the perspective (POV / FOV).

eg.

• https://doc.qt.io/qt-5/qml-qtquick3d-perspectivecamera.html#fieldOfView-prop
• https://doc.qt.io/qt-5/qt3drender-qcamera.html#fieldOfView-prop

I don't know if one of those classes above would help you at all (unless you want to render your image in some virtual 3D environment).

I could be wrong, but in my opinion, you dont need any framework or class for this, since it's just plain math / physics.