topic Re: Find active camera viewport in 3ds Max Programming Forum

Find active camera viewport

w.haak — Wed, 14 Aug 2024 09:57:36 GMT

My script needs to work in the viewport which has the only camera assigned to it in the scene, but this may be a viewport in a different viewpanel than the default opening state of the scene.

Right now I'm creating an array of visible viewpanels and then loop over the viewports in each panel until I find my camera when getActiveCamera() returns 'true', I'll set that viewport to active. Seems super clunky, loops within loops.
Is there a more direct version?

Betreff: Find active camera viewport

wernienst — Wed, 14 Aug 2024 10:57:01 GMT

If there is only one camera in the scene you can switch the active viewport to that camera by executing

max vpt camera

If there are more cameras, the Select Camera dialog opens.

MaxScript Help

Re: Find active camera viewport

w.haak — Wed, 14 Aug 2024 13:23:56 GMT

Pretty neat! Didn't know that one.
I was trying to find the viewport so that Background, Safe Frame etc was preserved.
I'll keep my ugly code for now. Learned in the process that viewport.activeViewportID is a unique ID for a viewport across all panels, while viewport.activeViewport is the index of the viewport in the current panel.
So that makes it bit easier, by cycling over the viewports until getActiveCamera() != undefined and then returning the viewport.activeViewportID to so that viewport.activeViewportID = id can then set it up correctly.

As usual maxscript irritates with inconsistent syntax.

ViewPanelManager.SetActiveViewPanel pID

sets the Viewpanel while
viewport.activeViewportID = fID

sets the Viewport.

Re: Find active camera viewport

denisT.MaxDoctor — Thu, 15 Aug 2024 00:39:51 GMT

for panel = 1 to ViewPanelManager.GetViewPanelCount() do ( for index = 1 to viewport.numviews do ( id = viewport.getid index viewPanelIndex:panel cam = viewport.getCamera index:index viewPanelIndex:panel format "panel:% viewport:% id:% camera:%\n" panel index id cam ) )

So, the only way is to iterate through all views in all panels. Of course, you can check if a panel is visible and the viewport is valid.

Re: Find active camera viewport

w.haak — Thu, 15 Aug 2024 09:05:22 GMT

@denisT.MaxDoctor
That's quite elegant. Learning a lot, thanks!