[X3D-Public] camera, random path on a sphere around the center

[Joe D Williams]

Also consider use of the ProximitySensor. For example, try using
the sensor located at the center of interest. The sensor orientation 
output can tell you which way to look as you move the view.
Notice the possible relationship between the ProximitySensor
orientation_changed output and the ViewPoint orientation input. I have
an example around somewhere but also consider the Viewpoint 
CenterOfRotation if the interactor can also use manual navigation.
Good Luck,
Joe
http://www.hypermultimedia.com/x3d/viewpoint/SixViewpointTour2box.x3dv
http://www.hypermultimedia.com/x3d/viewpoint/SixViewpointTour2.txt


----- Original Message ----- 
From: "Bederov, Sergey" <bederov at cortona3d.com>
To: "John Carlson" <john.carlson3 at sbcglobal.net>
Cc: <x3d-public at web3d.org>
Sent: Thursday, November 03, 2011 2:05 AM
Subject: Re: [X3D-Public] camera, random path on a sphere around the
center


> Hello John,
>
> Obviously no interpolator can produce anything random. A couple of
> ideas:
>
>  -  Generate a reasonably long interpolator using many random
> numbers and save it to the X3D file;
>
>  -  Create a script which employs a random-number generator to move
> the camera in real time;
>
>  -  Create several simple interpolators and apply them to nested
> Transforms the innermost of which contains the camera; if you guess
> good relationship of rotation axes and speeds, the motion will
> appear random.
>
> To rotate the camera in a sphere while pointing to the center, I
> would recommend putting the camera into a Transform and rotate the
> Transform around the sphere center. This is simpler than separately
> moving and rotating the camera and will allow to avoid some motion
> artifacts.
>
>
>                                           Sergey Bederov
>
>
>
>> -----Original Message-----
>> From: x3d-public-bounces at web3d.org
>> [mailto:x3d-public-bounces at web3d.org] On
>> Behalf Of John Carlson
>> Sent: Thursday, November 03, 2011 8:51 AM
>> To: x3d-public at web3d.org
>> Subject: [X3D-Public] camera, random path on a sphere around the
>> center
>>
>> I'd like to take the camera, put it on an invisible sphere, and
>> have it take
>> a random path on the sphere while the camera is focused on the
>> center
>> (0,0,0) of the scene.  Is there an Interpolator that will do this?
>> I'd like
>> to do this in X3DOM (preferred) or JavaScript (okay).
>>
>> John
>> _______________________________________________
>> X3D-Public mailing list
>> X3D-Public at web3d.org
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>
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