[X3D-Public] X3D Followers meeting Wednesday please

Don Brutzman brutzman at nps.edu
Mon Feb 6 09:08:45 PST 2012

Some minor but longstanding action items are to address comments on
the Followers (chasers and dampers) component.  Herbert, we need your
feedback please.

Primary points:
- shouldn't there be a ScalarDamper node to correspond to ScalarChaser?
	(InstantReality has also implemented this)
- getting consistent browser support for example scenes

Can we address these points on this Wednesday's X3D conference call?
0800 pacific, 1700 Berlin time.  Please attend if possible.  TIA.

> On 12/9/2011 5:49 AM, Don Brutzman wrote:
>> Herbert, we are still hoping to hear from you regarding Followers.
>> Two key messages follow. Please advise if you can help us
>> - confirm status of BS Contact support for Followers
>> - finish our update of your early examples to match the specification,
>> they only work in Instant Reality
>> - confirm if you agree that adding ScalarChaser (to match ScalarDamper)
>> is an important missing step that needs to be fixed
>> Hope you are well, thanks for looking at this. Your contributions
>> of these nodes are important and essential, we are trying to finish
>> the job fully. Please call my cell +1.831.402.4809 if that can help.

> Subject:
> [X3D-Public] new version of X3D-Edit: support for Followerscomponent
> From:
> Don Brutzman <brutzman at nps.edu>
> Date:
> 2/10/2010 9:00 AM
> To:
> X3D Graphics public mailing list <x3d-public at web3d.org>
> X3D-Edit is an open-source Extensible 3D (X3D) Graphics authoring tool
> for simple error-free editing, authoring and validation of X3D scenes.
> Online at
>         https://savage.nps.edu/X3D-Edit
> We are happy to announce a new version of X3D-Edit that includes support for
> the X3D Followers component, namely Chaser and Damper nodes.  These nodes
> help provide superior animation support by rapidly following (Chaser) or
> smoothly following (Damper) a target value.  For all such follower animation,
> the follower node smoothly tracks between an initialValue field and a
> corresponding initialDestination field.
> Chasers/damper nodes are provided for simple single-valued and array types:
> SFFloat         ScalarChaser
> SFVec2f         PositionChaser2D, PositionDamper2D
> SFVec3f         PositionChaser, PositionDamper
> SFColor         ColorDamper
> SFRotation      OrientationChaser, OrientationDamper
> MFVec3f         CoordinateDamper
> Of note is that there are only a few public Web3D examples available for
> testing follower nodes.  I will be working with Herbert Stocker of
> BitManagement on adding and testing his examples to the public
> Basic examples archive.  Additional contributions will also be welcome.
> His Web3D Symposium paper and preliminary examples are online:
> http://www.web3d.org/x3d/content/examples/Basic/Followers/Stocker_06_Followers.pdf
> http://www.hersto.net/VRML/DampersHowto/?lay=2
> Of related interest:  X3D component support for the many components
> in X3D version 3.2 are documented for 4 different authoring tools at
> http://www.web3d.org/x3d/wiki/index.php/Tool_support_for_X3D_components
> Comments and questions welcome, hope you like it.

all the best, Don
Don Brutzman  Naval Postgraduate School, Code USW/Br       brutzman at nps.edu
Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA   +1.831.656.2149
X3D graphics, virtual worlds, navy robotics http://faculty.nps.edu/brutzman

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