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.

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...