[x3d-public] web3d working group demos > HAnim > CrowdSystem Component

GPU Group gpugroup at gmail.com
Sat Jul 4 13:01:21 PDT 2020

Thanks for feedback Don and best wishes on your 4July.
Q. is there a handy Proto version of particle systems? Can be old .
out of date if it has the basic idea/design pattern
Then particle emitters -> people emitters
various physics models and trajectories -> crowd patterns on walk areas
Otherwise might be easier and faster to copy & paste and hack particle
emitters till idea gels, then convert to proto.
.Freewrl prototyping is bullet proof. What's not implemented is
shorthand syntax for X3D language binding ie
ProtoDeclare name='funny'
ProtoInstance name='funny' ...
could be
ProtoDeclare name='funny'
funny ...
Or any other shorthand syntax - is that in version 4?

On Sat, Jul 4, 2020 at 1:07 PM Don Brutzman <brutzman at nps.edu> wrote:
> Hi Doug, this sounds like an excellent potential application.  Several reactions, outlining strategy for summer.
> a. Sounds like work would need to be done to demonstrate this effectively before trying to make a component out of it.
> b. We are working hard to get the X3D4/HAnim2 examples working well.  Steady progress continues, oriented around Quality Assurance (QA) to detect issues in these highly complex models, with X3dTidy automatically fixing when possible.  More to be announced soon.
> * https://www.web3d.org/x3d/content/examples/HumanoidAnimation
> c. We will next turn our attention to HAnimMotion and the excellent suggestions you have posted there.
> d. We will then focus on BVH conversions for Motion Animation.
> d. One way to deliberately tackle X3D implementation of crowd systems is with prototypes, experimenting with simple designs first.  Meanwhile it is very encouraging to see X3DOM prototypes (and even scripting) taking form.  Wondering, how robust do you think FreeWrl is with prototypes?  Are there any prototyping questions during our current activity that might help you further?
> Thanks (as ever) for all your constructive thinking and many efforts.  Onward we go...  8)
> On 7/3/2020 4:54 PM, GPU Group wrote:
> >
> > web3d has a ParticleSystem Component, and  a very fuzzy / blurry
> > thought is there could be something for crowds. If you have sidewalks,
> > maybe stairs and crosswalks, and a central plaza with a fountain, then
> > a CrowdSystemNode -like particle system- could generate people and
> > have them move around in various patterns, and without colliding or
> > breaking crosswalk light rules. Maybe pandemic spacing rules could be
> > adjustable.
> > What do you think?
> > -Doug Sanden
> 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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