not linear rotation of images

[Fabio Marconi]

Hello 4A

Testing this faboulous tools, i note an excessive jerky of the images during the rotation.
I think that would be better a continue mouvent of the images.
Similar problem appear during the regulation of the manual degree of rotation, too fast, impossible to obtain the wished result.
Good regulation of zoom with mouse weel.
Drag and mouvement seems ok.
good work
njin
---
Architecture: amd64
CheckboxSubmission: 24bfda22985f9f37974801ac35af0af3
CheckboxSystem: 4ed15c40009aa6f7770f606350a390a2
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
Package: a4 0.03~alpha~73-0~lucid1
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=it:en_GB:it_IT:en
 LANG=it_IT.utf8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-24.41-generic 2.6.32.15+drm33.5
Tags: lucid
Uname: Linux 2.6.32-24-generic x86_64
UnreportableReason: Questo non è un pacchetto Ubuntu genuino
UserGroups: adm admin audio cdrom dialout dip disk fuse libvirtd lpadmin netdev plugdev sambashare video

[Fabio Marconi (fabiomarconi)]

apport information

[Andrea Gualano (andrea-gualano)]

Hi Fabio, thanks for your bug report.

There are a few additional informations that would help us debug this one:
- is this something you can reproduce every time you play an A4 presentation, or something that happens randomly?
- is the bug related to the size of your A4 window (e.g. default size vs. full screen)?
- is the bug specific to one of the sample files or do you experience the same problem on all presentations?
- do you have the same problem when seeing a transition without rotation (e.g. the first time you click "Forward" in roi.svg)?

[Fabio Marconi (fabiomarconi)]

Hello guys

- is this something you can reproduce every time you play an A4 presentation, or something that happens randomly?

Yes, it happens everytime, obviously in the default size is not cleary visible, but due to the nature of this apps that probably will be used to show on large screen i prefer to test on fullscreen mode, with roi.svg it is more accentuated, but with nested_transform it is more confortable (not considering the aggressive red three).
Considering http://it.wikipedia.org/wiki/Video#Caratteristiche_principali_del_video seems clear that the jercky of images in rotation is due to an excessive velocity of rotation that make the caracteristics jumping ( brain construct an image in one position, but the second image that construct is not very near to the precedent because it is too advanced ).
E.G. you upload roi.svg, full screen mode, and rotate with arrows key, looking the corner of the green near the centre of the screen you see that it mouves lineary, but looking at opposite corner you can see that it mouves jumping, same happens when focusing blocks ( clicks on the arrow)
I've noted too an excessive use of cpu (xorg >70% when rotating) [Intel(R) Core(TM) i3 CPU 530 @ 2.93GHz 4 cpu] 2GBram

- is the bug related to the size of your A4 window (e.g. default size vs. full screen)?

Yes

- is the bug specific to one of the sample files or do you experience the same problem on all presentations?

Nestest-transform is more confortable but the red is too aggressive (IMHO)

- do you have the same problem when seeing a transition without rotation (e.g. the first time you click "Forward" in roi.svg)?

Yes, image enlarge jumping

Thanks guys, now don't tell me that my brain run slow and cannot construct the needed images ;-9