[ptx] Sluggish behaviour of the preview window

[Pablo d'Angelo]

Hi Ulf,

all suggestions are welcome :-)

The soon to be released hugin 0.6.1 fixes some bugs in the preview window,
to avoid some unnessecary image remapping, and disabling user interaction
during remapping. This should solve most of the issues below (well, except
that it still could be faster ;).

Switching images on and off should be very fast now, but dragging the fov
slider will still remap all images. The outline mode you suggested might be
a good idea, however I don't have time to implement it

As a workaround you can disable the auto-update (not that nice though...).

ciao
  Pablo

Ulf Wilhelmson schrieb:
> Hi.
> 
> I have seen a very sluggish behavior of the preview window when dragging the 
> fov-sliders. The remapping of the images do not seam to be very efficient and 
> thus takes some time to perform.
> 
> This leads to another rather-annoying effect. During the remapping the program 
> seams to be blind for mouse button actions and often miss the release of the 
> button. The problem naturally increases with the number of images and possible 
> also the original image size, this I'm not sure about though.
>  
> When the button release is missed the remapping starts over again when the 
> mouse is moved outside the image area. I'm running the OSX versions and do not 
> know whether it is a mac-only issue.
> 
> May I suggest two possible solutions:
> 
> It seams like the preview are using versions of all original images separately 
> and preform a remapping every time on each of them, regardless if it is a 
> result of a re-optimization, a change of projection or 
> a change of fov. 
> 
> If all shape-changing operations instead created a common image for previewing, 
> this image might be more efficient for rescaling when changing the fov. 
> 
> An even faster alternative might be to use the outline of the combined image 
> during the slider operation to show the resulting edge, and performing the 
> remapping after mouse button release is detected.
> 
> Sorry for the wordy post.  
> I also hope I'm not annoying anybody by suggestions in an area I have little 
> knowledge about.
> 
> Ulf
> 
> 
>