[x3d-public] Viewpoint (clipBoundary); missing from X3DUOM view on iPhone via google drive
Holger Seelig
holger.seelig at yahoo.de
Sun Jan 4 13:20:08 PST 2026
Please not that this Viewport.x3d test is from the freewrl tests directory and will look same in freewrl.
https://create3000.github.io/Library/Tests/Components/Layering/Viewport.x3d
https://freewrl.sourceforge.io/tests/35_Layering/
Best regards,
Holger
—
Holger Seelig
holger.seelig at yahoo.de
> Am 04.01.2026 um 21:52 schrieb John Carlson <yottzumm at gmail.com>:
>
> Holger’s example here has a rich use of clipBoundary!
>
> https://github.com/create3000/Library/blob/main/Tests/Components/Layering/Viewport.x3d
>
> Hopefully, you’ll get a donation!
>
>
> John
>
> On Sun, Jan 4, 2026 at 12:14 PM Don Brutzman <don.brutzman at gmail.com <mailto:don.brutzman at gmail.com>> wrote:
>> Appreciate your offer of a sophisticated example, but that is not what the archives and implementer community need right now.
>>
>> In addition to LayerSet Layer Viewport, you have prototypes (which overly complicate a simple test) and Script code (which is not well supported by all X3D browsers).
>>
>> ComposedCubeMapTexture and ComposedShader and ShaderPart add further complications that are not widely supported.
>>
>> The request remains, for anyone: simple example demonstrating Viewport (perhaps with Layer LayerSet and no other more-complex nodes).
>>
>> I recently sent everyone a long explanation of why simple examples are important, especially for issue requests.
>> [x3d-public] Request for X3D encoding comment output from X3DPSAIL
>> https://web3d.org/pipermail/x3d-public_web3d.org/2025-December/022165.html
>> Hope this helps.
>>
>> all the best, Don
>> --
>> X3D Graphics, Maritime Robotics, Distributed Simulation
>> Relative Motion Consulting https://RelativeMotion.info <https://relativemotion.info/>
>>
>> On Sun, Jan 4, 2026 at 9:48 AM John Carlson <yottzumm at gmail.com <mailto:yottzumm at gmail.com>> wrote:
>>> 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 <mailto: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 <https://relativemotion.info/>
>>>>
>>>> On Sun, Jan 4, 2026 at 8:31 AM John Carlson via x3d-public <x3d-public at web3d.org <mailto: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 <http://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 <mailto:x3d-public at web3d.org>
>>>>> http://web3d.org/mailman/listinfo/x3d-public_web3d.org
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