Horisontal AOV?

DavidBoulder

I did a quick little diagram, but its been a while since I have had to use any trig to write a formula. aov triangles.png

TIG

My seemingly convoluted code does return the correct horizontal fovH in degrees from the current fov [i.e. vertical] in degrees...
It uses the focal_length of the current camera to get this...
The results matches what appears [on a PC] with the code snippet Sketchup.send_action(10624) for the fovH value... so I am confident in its efficacy.

Dan Rathbun

On this subject.. FOV a registry question.

I noticed a setting in the registry Tools/FovDisplayMode
my setting is 0

What is this ?

Chris Fullmer

You can switch between horizontal and vertical in the dialog window that pops up with:

Sketchup.send_action(10624)

I wonder if that registry setting controls that? That would be nice to be able to switch the user back and forth from horizontal and vertical as needed maybe?

Otherwise, if its not that, I am out of ideas (for now).

Chris

Chris Fullmer

Though FOV being horizontal or vertical seems to be associated with the model, not as an SU global setting. So it is probably not that then?

Chris

thomthom

The global default?

Chris Fullmer

I suppose it could be, but if it is, the template file is overwriting it.

Dan Rathbun

@chris fullmer said:

You can switch between horizontal and vertical in the dialog window that pops up with:
Sketchup.send_action(10624)
I wonder if that registry setting controls that? That would be nice to be able to switch the user back and forth from horizontal and vertical as needed maybe?

I changed the setting to 1, and see no difference, in the model or in any of the settings in that Camera dialog.
Could be an orphan setting left over from some earlier version.

Why is there no menu choice or constant string to bring up that dialog?? Is this a WIN only feature?

Chris Fullmer

Yes, it seems to be Win only.

thomthom

Think it's a debug dialoge.

But I do wonder why one can set vertical or horisontal AOV from the UI. And why camera.aspect_ratio isn't exposed in the UI.

TIG

camera.fov always returns the 'vertical' fov. Many 3rd party apps you export to need the 'horizontal' fov - so fov = 30 degrees fovV >> ~52 degrees fovH...
My method does return fovH in degrees correctly: it's worked out from the only available bits via the API - i.e. camera.fov [vertical, in degrees] & camera.focal_length & the screen's width [ view.vpwith] or the camera.image_width, if that's set [it's >0 if you are using a specific 'camera type']... which can then be combined to get it...
You can get the camera.aspect_ratio as it's the ratio of the two fov's ??

thomthom

@tig said:

You can get the camera.aspect_ratio as it's the ratio of the two fov's ??

?

You do get camera.aspect_ratio via the ruby API. But I was wondering why it is not part of the Sketchup UI to control.

TIG

The 'aspect_ratio' is both get-able and set-able using the camera methods... but it defaults to 0 and therefore the view's screen sizes come into play in setting other values...
The complex interaction of fov/focal_length/image_width/etc will potentially change it - I was suggesting you could get the ratio from which setting you want to 'fix' and then set the aspect_ratio to suit from that ??