[x3d-public] Viewpoint (clipBoundary); missing from X3DUOM view on iPhone via google drive

[John Carlson]

You can use this example of clipBoundary, in the archives, if you replace
the shaders and images:

https://github.com/coderextreme/X3DJSONLD/blob/master/src/main/data/bumpyx_itesliders.x3d

I was working on a version with different shaders and no images.  The
sliders didn’t work in FreeWRL, so I shelved it.  It’s available on this
page, and you can use in the archives.

https://coderextreme.net/X3DJSONLD/src/main/html/bumpyrefs.html

I don’t know if the sliders work on these as I am on my phone.   Try
dragging the grey/white letters next to the = sign with the mouse.

Again, much of this is Christoph Valentin and Doug Sanden’s work, with a
new face!

John

On Sun, Jan 4, 2026 at 10:42 AM Don Brutzman <don.brutzman at gmail.com> wrote:

> John, we do not have a simple example demonstrating proper use of the
> Viewport node in the X3D Example Archives, and so it is difficult to test
> what you are reporting.
>
> all the best, Don
> --
> X3D Graphics, Maritime Robotics, Distributed Simulation
> Relative Motion Consulting  https://RelativeMotion.info
>
>
> On Sun, Jan 4, 2026 at 8:31 AM John Carlson via x3d-public <
> x3d-public at web3d.org> wrote:
>
>> One of the gotchas in adding strict mode to Ajv JSON schema validation is
>> Viewport.clipBoundary:
>>
>> Viewport : X3DViewportNode, X3DBoundedObject {
>>   MFNode  [in]     addChildren             [X3DChildNode]
>>   MFNode  [in]     removeChildren          [X3DChildNode]
>>   MFNode  [in,out] children       []       [X3DChildNode]
>>   MFFloat [in,out] clipBoundary   0 1 0 1  [0,1]
>>   SFBool  [in,out] bboxDisplay    FALSE
>>   SFNode  [in,out] metadata       NULL     [X3DMetadataObject]
>>   SFBool  [in,out] visible        TRUE
>>   SFVec3f []       bboxCenter     0 0 0    (-∞,∞)
>>   SFVec3f []       bboxSize       -1 -1 -1 [0,∞) or -1 -1 -1
>> }
>>
>> I don’t recall if this was discussed on the mailing list before.
>>
>> The error reported was:
>>
>> strict mode: "prefixItems" is 4-tuple, but minItems or maxItems/items are not specified or different at path "#/oneOf/1/properties/%40clipBoundary"
>>
>>
>> I don’t know if # prefixItems = 4 is appropriate here, since clipBoundary
>> is an MFFloat.  I don’t know how to set a default for MFFloat without
>> prefixItems.  I could set minItems = 0
>>
>> The JSON schema says:
>>
>> "@clipBoundary": {
>> "$comment": "MFFloat inputOutput",
>> "type": "array",
>> "prefixItems": [
>> {
>> "default": 0,
>> "maximum": 1,
>> "minimum": 0,
>> "type": "number"
>> },
>> {
>> "default": 1,
>> "maximum": 1,
>> "minimum": 0,
>> "type": "number"
>> },
>> {
>> "default": 0,
>> "maximum": 1,
>> "minimum": 0,
>> "type": "number"
>> },
>> {
>> "default": 1,
>> "maximum": 1,
>> "minimum": 0,
>> "type": "number"
>> }
>> ],
>> "items": {
>> "maximum": 1,
>> "minimum": 0,
>> "type": "number"
>> }
>> },
>>
>>
>> X3DUOM 4.0 says:
>>
>> ConcreteNode name="Viewport">
>> <InterfaceDefinition specificationUrl="
>> https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/layering.html#Viewport
>> "
>> appinfo="Viewport is a Grouping node that can contain most nodes.">
>> <componentInfo name="Layering" level="1"/>
>> <Inheritance baseType="X3DViewportNode"/>
>> [snip]
>> <field name="clipBoundary"
>> type="MFFloat"
>> accessType="inputOutput"
>> default="0 1 0 1"
>> minInclusive="0"
>> maxInclusive="1"
>> description="clipBoundary is specified in fractions of the normal render
>> surface in the sequence left/right/bottom/top."/>
>> [snip]
>>
>> An addition, such as min/max length, if needed, would be a welcome
>> addition to X3DUOM.
>>
>> Also X3DUOM 4.0 XML ConcreteNode Viewport wasn’t viewable on my iPhone in
>> Google drive as downloaded from web3d.org (there was no way to view the
>> full XML in safari, chrome or on sourceforge or drive).  I probably
>> could have downloaded from sourceforge.
>>
>> So I used my old copy on GitHub.
>>
>> John
>>
>>
>> _______________________________________________
>> x3d-public mailing list
>> x3d-public at web3d.org
>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
>>
>
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