[vtk-developers] vtkAnimationScene

[Utkarsh Ayachit]

Hi John,

You are correct about the looping. Your fix makes perfect sense for
sequence mode playing. The difficulty is in real-time mode. The problem
being how to define looping when playing the real-time mode. If delta
time passes after the end time, should we interpret as delta time from
start time when looping? If not, what is the delta that concides with
the start time? I went for treating time as a cycle begining and ending
at the same point (when looping). That being said, it's not correct to
enforce similar limitation in sequence mode (where deltas are
well-defined). I can fix that, unless you already have a patch for it.

I don't think anyone "feels strongly" about the animation scene and
cues, however, since they are used in ParaView, any substantial
behavioural changes may have repercussions there. It would be nice if we
could discuss these adjustments.

Utkarsh.


John Biddiscombe wrote:
> At the end of a loop, animation scene decrements its counted by "span"
> which is (say)
> 134-130=4
> but the counter goes 135-4 putting it back to 131 at the start of the
> next loop.
> 
> Is this intentional? I think it's the wrong behaviour, if I tell my
> animation to run from a to b and loop, I expect it to honour those
> bounds (inclusive). In sequence mode this seems fine, in realtime mode,
> perhaps there is something else to consider?
> 
> I have some other tweaks I'd like to make to animation cue and animation
> scene. Does anyone feel strongly about these classes and if I make
> adjustments does anyone want to take this off list and discuss them.
> 
> thanks
> 
> JB
> 
> 
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