[x3d-public] Proposed Standard additions. MFStringSequencer and MFNodeSequncer

[John Carlson]

Good suggestion, Vince.  We still need a place to discuss forming such a
group.

I propose we use the Sunrize editor/authoring system GitHub project for
discussion.  Holger?

https://github.com/create3000/sunrize

Can we add wiki or forums to the sunrize github project?



On Mon, Sep 11, 2023 at 10:31 AM Vincent Marchetti <vmarchetti at kshell.com>
wrote:

> I don't want to discourage anyone from trying any idea in programming, or
> even discuss potential design of a system which take the current X3D as a
> jump off point for a much different type of architecture, but I judge that
> making the ROUTE statements in a scene description modifiable via events.
> should be far over the horizon for the X3D development and maintenance
> team, and to be blunt should be pursued in a separate forum such as a
> github project or Slack channel.
>
> We have several X3D viewers which are open source and lend themselves to
> being forked and modified to allow modifying the ROUTEs in real time, but
> these projects should be identified as no longer X3D viewers but a
> different (possibly much better, I allow) 3D authoring system.
>
> I refer anyone to an interesting document on the design of VRML 2, this
> document is at https://mitra.biz/vrml/vrml2/sgi_design_15jan96.html . It
> gives specific reasons for the design and abilities of ROUTEs which I think
> are still valid.
>
> Vince Marchetti
>
>
> > On Sep 11, 2023, at 11:14 AM, Joe D Williams <joedwil at earthlink.net>
> wrote:
> >
> > Great, another way to be able to do without scripting. AddChild, remove
> child, addroute removeroute.
> > Joe
> >
> > -----Original Message-----
> > From: GPU Group <gpugroup at gmail.com>
> > Sent: Sep 11, 2023 7:01 AM
> > To: X3D Graphics public mailing list <x3d-public at web3d.org>
> > Subject: Re: [x3d-public] Proposed Standard additions. MFStringSequencer
> and MFNodeSequncer
> >
> >
> > Or rely on integerSequencer to generate integer index, and have a
> packed/contiguous list:
> >
> >
> > StringSwitch - inputOnly SFInt32 set_index, outputOnly SFString
> value_changed, field MFString values
> >
> > NodeSwitch - inputOnly SFInt32 set_index, outputOnly SFNode
> value_changed, field MFNode values?
> >
> > Benefit, can generate more node types as needed with fewer lines of code.
> >
> > Or could combine into one giant FieldChoice node with fields MFNode
> node_values, MFString string_values, MFDouble, MFFloat, MFTime, MFImage,
> MFMatrix3f ...
> >
> > and outputOnly node_changed, string_changed, double_changed,
> float_changed, time_changed, image_changed, matrix3f_changed output fields,
> >
> > and when set_index, it outputs any SF that are within the corresponding
> MF range?
> >
> > Benefit: only one new node needed.
> >
> > -Doug
> >
> >
> > On Sun, Sep 10, 2023 at 11:36 PM John Carlson <yottzumm at gmail.com>
> wrote:
> > We can do this with SAI by adding and removing routes.  But the question
> is, can we do it declaratively, without script?
> >
> > John
> >
> > On Mon, Sep 11, 2023 at 12:23 AM John Carlson <yottzumm at gmail.com>
> wrote:
> > Say I want to take a [0,1] fraction key and map it to an MFString
> keyValue.  How do I do that in X3D?
> >
> > This might be used for alternating Text nodes, or ROUTEs (as nodes), see
> below.
> >
> > Also, can I take a similar key fraction and map to keyValue MFNodes?
> >
> > I realize that Switch plus and ScalarInterpolator would satisfy the
> latter.
> >
> > I’m not clear on how to do the former. This would be key to sending
> events to ROUTEs, changing the from/to node names and fields.
> >
> > This seems like a very powerful feature!  I just don’t know how to route
> SFString events to route statements.  Is there an alternative?
> >
> > Maybe I should create an Uber X3D?  Can we add DEF and name to ROUTEs,
> and make them first class nodes?
> >
> > I’m not sure how performant this would be, or even how implementable.
> >
> > It’s probably an idea to throw in the trash!  It’s derived from trying
> to reduce source code size.
> >
> > Thanks!
> >
> > John
> >
> >
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