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MathGroup Archive 2007

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Re: Stopping Automatic Animation in v6

  • To: mathgroup at smc.vnet.net
  • Subject: [mg76861] Re: Stopping Automatic Animation in v6
  • From: "Brian Gladman" <brg at nowhere.org>
  • Date: Tue, 29 May 2007 04:49:04 -0400 (EDT)
  • References: <f36d9n$5q2$1@smc.vnet.net> <f38s5g$icv$1@smc.vnet.net> <f3bgth$366$1@smc.vnet.net> <f3dpr5$g1a$1@smc.vnet.net>

"Szabolcs" <szhorvat at gmail.com> wrote in message 
news:f3dpr5$g1a$1 at smc.vnet.net...
> Brian Gladman wrote:
>> "Jean-Marc Gulliet" <jeanmarc.gulliet at gmail.com> wrote in message
>> The very first time this is evaluated after starting up Mathematica, it 
>> is
>> static but all subsequent evaluations, for example, with a change of one 
>> of
>> the lines, are then immediately dynamic. That is, animation starts as 
>> soon
>> as the expression is re-evaluated.  Moreover if I make a change in the
>> expression and re-evaluate it, the graphic animation continues from the 
>> last
>> position it reached and not from the initial position set by the 
>> expression
>> re-evaluation.
>
> What do you mean when you say "animation"? Does the plot start to *move*
> and change by itself as soon as it appears? I don't see this behaviour
> ... Do you have any special definitions in your init.m file? Please
> check that $DisplayFunction is set to Identity.

I have not modified init.m manually since I installed Mathematica 6 and I 
have not changed any default settings.

$DisplayFunction is set to Identity

> Or do you mean the ability to rotate the graphic with the mouse? If the
> problem is the latter, then simply set the ViewPoint option explicitly:
> this way the view point will be reset every time you re-evaluate.

I have tried this but it does not suppress the automatic animation.

> Or use PreserveImageOptions -> False.

I have not tried this explicitly but this is the default set by my init.m 
file.

> You may also be interested in the RotationAction option.

I looked at this but as far as I can see it changes how the animation is 
undertaken but not whether it is undertaken.

> But please try to be more specific about the problem ...

1. Save a notebook with the expressions I gave earlier in its only two cells

2. Start Mathematica 6 from scratch (i.e with a completely 'clean' kernel 
and front end).

3. Load the notebook, select the two cells and select 'evaluate cells' from 
the evaluation menu.

4. Make no further input.

On my system the graphic is produced and then it is immediately animated by 
showing it with a continuously changing (random?) viewpoint.

>> What I am looking for is a switch to simply say that for this particular
>> object animation should not be undertaken.
>>
>>> Or are you talking about the new real-time feature that allows the user
>>> to rotate or expand or shrink 3D graphics with the mouse?
>>
>> I think it is related to this in some way. These are great new 
>> capabilities
>> but it is not obvious to me how I can switch them on and off.
>
> I really don't see why would anyone want to switch off the ability to
> rotate graphics with the mouse ... if you don't touch them, they don't
> change anyway ... just like in version 5.2 ...

I suspect that it is because you are not seeing the behaviour that I am 
seeing that you don't understand what it is that I want to switch off.

The ability to move the graphic around with the mouse is fine and I do not 
want to switch this feature off.

The 'feature' I wan't to turn off - if it is a feature and not a bug - is 
the automatic animation of the graphic after it is produced.   I must admit 
that I thought this was a feature, which is why I have been looking for an 
option to turn it off.

But the fact that I am seeing this behaviour and others are not now suggests 
that it is a bug and not a feature.

My thanks to you and others who have provided input on this.

    best regards,

         Brian Gladman



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