[Bf-vfx] Bundle display orientation

[Sergey I. Sharybin]

Hi all,

Answers are inlined.

Ton Roosendaal wrote:
> Hi Seb,
>
> I'm not sure how to interpret this request; but to me it seems very sane and predictable to only draw bundles inside the camera transformation. Camera tracking is based on camera-space, it can only give camera-space results. There's no information in video/film footage to derive where 'up' or 'down' is, or how a camera is tilted.
Yes, there's no such information came from camera solver directly, but 
it's what definitely known after you oriented camera in scene (defining 
origin, floor, axis direction).
> What you do by positioning/rotating/scaling camera is to provide a mapping from 'video/camera space' into Blender's scene (world space). A user can decide to either scale or rotate the objects in a scene into the camera, or the other way around. All very basic, predictable and nice I think. :)
Currently bundles are used as a "reference" to place objects in 
Blender's scene, you can't actually parent something to bundle and, 
anyway, if it was possible i don't think having bundles oriented in 
camera space was so helpful. Look at bundles as representation of real 
features -- real features are in global space, not in camera space and 
usual workflow is to orient solved camera in a way, that scene's floor 
respects real floor and X axis respects some "axis" from real world and 
all objects placed in scene respects things happening on the footage. 
That's why bundles which are used as reference are nicer not follow 
camera rotation.

It's not difficult to achieve and it should be more useful than current 
behavior.
> -Ton-
>
> ------------------------------------------------------------------------
> Ton Roosendaal  Blender Foundation   ton at blender.org    www.blender.org
> Blender Institute   Entrepotdok 57A  1018AD Amsterdam   The Netherlands
>
> On 18 Sep, 2011, at 11:16, Sebastian König wrote:
-- 
With best regards, Sergey I. Sharybin

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