[x3d-public] bindTime specification incomplete

[John Carlson]

This may be total BS.  You’ve beed warned.  bindTime is used in Blender
importer to determine which TimeSensor to use in keyframing (and when to
start animation, I think).  But good luck trying to get XML animation
working in Blender.  Perhaps a .wrl?

WIP, no end in sight as I am developing a Blender loader with an exporter.
I’m not even to animation yet, my demo mostly consists of HAnimSites with
Text, Billboard and TouchSensor, one of which Blender knows about.

I’m not sure what the status of X3D import/export is in Blender.

I have been (slowly) moving X3D non-appearance, non-geometry nodes into
Blender EMPTY objects.  I’ve gotten as far as DEF/USE, and I’m finding I
could revamp the exporter.

Probably Viewpoints also can be animated, so the bindTime could be when the
eye moves to that Viewpoint.  I will check the links now.

On Tue, Aug 27, 2024 at 10:25 PM Andreas Plesch via x3d-public <
x3d-public at web3d.org> wrote:

> Trying to add bindTime fields in x3dom, I checked the specification
> and found that the field is almost never explained although it appears
> in all bindable node signatures. Perhaps I missed something.
>
> The only place I could find where there is an actual definition of how
> the field operates is in
>
>
> https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/navigation.html#X3DViewpointNode
>
> This section and the tooltips strongly suggest that it comes as a pair
> with the isBound field which is covered in detail here:
>
>
> https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/core.html#BindableChildrenNodes
>
> If confirmed, this section may then be the appropriate place to add
> language similar to what is provided for X3DViewpoint (unless bindTime
> is purposefully left open to browser interpretation for all other
> bindable nodes).
>
> -Andreas
>
>
> --
> Andreas Plesch
> Waltham, MA 02453
>
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