Dragging in mosaic modifies projection.

[rew]

When trying to see what dragging in mosaic mode (in fast-preview) would do (new feature that I don't know), It suddenly modified my pano from a 360 degree pano to a 180 degree one.

This is on Linux, with a recent (nov 2010) mercurial pull....

[tmodes (tmodes)]

Translation parameters/mosaic mode works only for HFOV <180 deg. So this is not bug.
Also the projection is not changed, only the output is cropped to below 180 deg.

[rew (r-e-wolff)]

Then it's a bug that the button isn't grayed out.

What I saw happening with mosaic is that I could distort part of the pano. I have a pano where I took a full 360 degrees, with the church tower in one direction. Turns out that to get the church tower in the picture I tilted the camera up a bit. So now I have the tip of the church sticking out so high that I didn't photograph any sky in all the other images. So using mosaic to drag the whole church down a bit would work. But now I'm restricted to < 180 degrees. I don't understand. Leave the rest of the 360 degree FOV alone, and only operate on the 180 degrees around the affected area.

Or gray out the button when it isn't available. And show a message next to it: "reduce FOV to < 180 to use mosaic".

Or post a message: "FOV must be reduced to 180 because you want to use mosaic// Cancel? OK?".

[Yuv (yuv)]

On November 26, 2010 05:14:04 am rew wrote:
> Then it's a bug that the button isn't grayed out.

agree this is a usability issue and we should warn/prevent the user from
messing up their own work.

As a quick fix I would put a check when switching drag mode to mosaic. If the
pano is >180, issue a warning (but still activate mosaic drag mode). No
graying out for now.

Longer term it may be worth to determine if the project is
(a) a mosaic
(b) a panorama
(c) undetermined
but this is not as easy as it sounds.

Every project starts undetermined.

X/Y/Z can be used in panoramas (e.g. for the nadir shot of a full spherical)
input > 180° can be used for a mosaic, eg. when a series of equirects shot
along a street is used to generate a mosaic of the fassade.

 status confirmed
 importance wishlist
 tag usability mosaic hugin

[tmodes (tmodes)]

This is fixed with the new translation plane parameters.