A clone of an active_view.camera

[tomasz]

In my script I want to store an active_view.camera and restore it later on.

When I use regular:

stored_camera=Sketchup.active_model.active_view.camera
...
modifying the view
...
Sketchup.active_model.active_view.camera=stored_camera

This does not restore camera, because the stored_camera just references the current_view.camera

So I have done a copy of the camera object:

stored_camera=Sketchup.active_model.active_view.camera.clone
...
modifying the view
...
Sketchup.active_model.active_view.camera=stored_camera

This gives me an error:
#<TypeError: reference to deleted Camera>

I have tried Marshal::load(Marshal.dump(active_view.camera)) but the camera has no such a method.

The question is : how can I successfully store current_view.camera?
I know that it could be done by doing what Marshal is supposed to do, but we do not have access to all camera parameters (2p perspectives).

[thomthom]

Have you tried .dup ?

[tomasz]

@thomthom said:

Have you tried .dup ?

Same thing. Object already deleted.

[tomasz]

I have found a solution, but will be thankful for a simpler, if such exists.

I can create a temp_scene, make modifications to a view and then set selected_scene=temp_scene and delete it. Can be done with undo as well.

[TIG]

If you remember the current camera's data then later on you can simply make a new camera using those ?
camera = model.active_view.camera eye = camera.eye target = camera.target up = camera.up pers = camera.perspective? fov = camera.fov

change stuff including the view's camera details...###

new_camera = Sketchup::Camera.new(eye, target, up, pers, fov)
The 'new_camera' is now a 'clone' of the original 'camera'...
model.active_view.camera = new_camera
now sets the camera back as it was initially...

[tomasz]

@tig said:

If you remember the current camera's data then later on you can simply make a new camera using those ?

@unknownuser said:

I know that it could be done by doing what Marshal is supposed to do, but we do not have access to all camera parameters (2p perspectives).

[TIG]

The 2pt perspective is not an accessible camera parameter.
No more that Sketchup.send_action("viewTop:") or Sketchup.send_action("viewPerspective:") is... the camera settings only change for the eye/target/up when a '2pt Perspective' is evoked...
A 2pt Perspective is a 3D view with perspective 'off' [parallel projection] with a specific eye point / target / up that gives no distortion in 3D when perspective is 'off' - therefore doesn't saving the settings I listed duplicate a 2pt anyway - IF the camera's view it is one, because the camera is set so ??
If there were a Sketchup.send_action("viewPerspective2pt:") to set it [and there's not] then there's still no way of establishing if the view was in '2pt' anyway - other than the camera's parameters.....

[tomasz]

@tig said:

The 2pt perspective is not an accessible camera parameter.

Unfortunately it is a camera parameter.
cx cy and Scale describe how much the 2d image has been shifted and zoomed in\out.
They are not being accessible from Ruby.

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[TIG]

But it is a transient setting!
If you click in the view it evaporates...
It would be good if it were accessible but it is pretty transient...