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updated docs on reflection mapping

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Leon van Kammen 2024-10-14 11:52:35 +02:00
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10
doc/RFC_XR_Fragments.html
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@ -1345,7 +1345,15 @@ To apply environment mapping efficiently in a 3D scene, traverse the scene graph
</code></pre>
<p>Most 3D viewers apply one and the same environment map for various models, however this logic
allows a more natural &amp; automatic strategy for reflection mapping.</p>
allows a more natural &amp; automatic strategy for reflection mapping:</p>
<ol>
<li>traverse the scene graph depth-first</li>
<li>remember the most recent parentnode (P) with a texture material</li>
<li>for every non-root node with a texture material
3.1 clone that material (as materials might be shared across objects)
3.2 set the environmentmap to the last known parent texture (P)</li>
</ol>
<h1 id="transclusion-broken-link-resolution">Transclusion (broken link) resolution</h1>

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doc/RFC_XR_Fragments.md
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@ -859,7 +859,13 @@ To apply environment mapping efficiently in a 3D scene, traverse the scene graph
```
Most 3D viewers apply one and the same environment map for various models, however this logic
allows a more natural & automatic strategy for reflection mapping.
allows a more natural & automatic strategy for reflection mapping:
1. traverse the scene graph depth-first
2. remember the most recent parentnode (P) with a texture material
3. for every non-root node with a texture material
3.1 clone that material (as materials might be shared across objects)
3.2 set the environmentmap to the last known parent texture (P)
# Transclusion (broken link) resolution

180
doc/RFC_XR_Fragments.txt
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@ -3,7 +3,7 @@
Jens & Leon Internet Engineering Task Force L.R. van Kammen
Internet-Draft 7 October 2024
Internet-Draft 14 October 2024
Intended status: Informational
@ -53,7 +53,7 @@ Status of This Memo
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Internet-Draft XR Fragments October 2024
@ -63,7 +63,7 @@ Internet-Draft XR Fragments October 2024
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on 10 April 2025.
This Internet-Draft will expire on 17 April 2025.
Copyright Notice
@ -109,7 +109,7 @@ Table of Contents
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Internet-Draft XR Fragments October 2024
@ -125,7 +125,7 @@ Internet-Draft XR Fragments October 2024
23. Topic-based index-less Webrings . . . . . . . . . . . . . . . 32
24. URI Templates (RFC6570) . . . . . . . . . . . . . . . . . . . 33
25. Additional scene metadata . . . . . . . . . . . . . . . . . . 33
26. Accessibility interface . . . . . . . . . . . . . . . . . . . 34
26. Accessibility interface . . . . . . . . . . . . . . . . . . . 35
26.1. Two-button navigation . . . . . . . . . . . . . . . . . 35
26.2. Overlap with fileformat-specific extensions . . . . . . 36
26.3. Vendor Prefixes . . . . . . . . . . . . . . . . . . . . 36
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Most 3D viewers apply one and the same environment map for various
models, however this logic allows a more natural & automatic strategy
for reflection mapping.
for reflection mapping:
1. traverse the scene graph depth-first
2. remember the most recent parentnode (P) with a texture material
3. for every non-root node with a texture material 3.1 clone that
material (as materials might be shared across objects) 3.2 set
the environmentmap to the last known parent texture (P)
22. Transclusion (broken link) resolution
@ -1722,6 +1728,16 @@ Internet-Draft XR Fragments October 2024
src or href values can make a difference
2. mirroring files on another protocol using (HTTP) errorcode tags
in src or href properties
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3. in case of src: nesting a copy of the embedded object in the
placeholder object (embeddedObject) will not be replaced when the
request fails
@ -1730,14 +1746,6 @@ Internet-Draft XR Fragments October 2024
| for client/server communication, non-HTTP protocols easily map to
| HTTP codes (ipfs ERR_NOT_FOUND maps to 404 e.g.)
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For example:
+────────────────────────────────────────────────────────+
@ -1778,6 +1786,14 @@ Internet-Draft XR Fragments October 2024
* href: schoolB.edu/projects.gltf#math&-courses math
* href: university.edu/projects.gltf#math&-theme math
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| This would hide all object tagged with topic, courses or theme
| (including math) so that later only objects tagged with math will
| be visible
@ -1786,14 +1802,6 @@ Internet-Draft XR Fragments October 2024
separate content into separate files, or show/hide things using a
complex logiclayer like javascript.
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24. URI Templates (RFC6570)
XR Fragments adopts Level1 URI *Fragment* expansion to provide safe
@ -1834,22 +1842,18 @@ Internet-Draft XR Fragments October 2024
* BibTex (https://bibtex.eu/fields) when known bibtex-keys exist
with values enclosed in { and },
*ARIA* (aria-description) is the most important to support, as it
promotes accessibility and allows scene transcripts. Please start
aria-description with a verb to aid transcripts.
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*ARIA* (aria-description) is the most important to support, as it
promotes accessibility and allows scene transcripts. Please start
aria-description with a verb to aid transcripts.
| Example: object 'tryceratops' with aria-description: is a huge
| dinosaurus standing on a #mountain generates transcript
| #tryceratops is a huge dinosaurus standing on a #mountain, where
@ -1892,6 +1896,16 @@ Internet-Draft XR Fragments October 2024
| These attributes can be scanned and presented during an href or
| src eye/mouse-over.
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26. Accessibility interface
The addressibility of XR Fragments allows for unique 3D-to-text
@ -1899,13 +1913,6 @@ Internet-Draft XR Fragments October 2024
Spec:
<Br>
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1. The enduser must be able to enable an accessibility-mode (which
persists across application/webpage restarts)
2. Accessibility-mode must contain a text-input for the user to
@ -1948,6 +1955,13 @@ Internet-Draft XR Fragments October 2024
Therefore a 2-button navigation-interface is the bare minimum
interface:
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1. objects with href metadata can be cycled via a key (tab on a
keyboard)
2. objects with href metadata can be activated via a key (enter on a
@ -1955,13 +1969,6 @@ Internet-Draft XR Fragments October 2024
3. the TTS reads the href-value (and/or aria-description if
available)
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26.2. Overlap with fileformat-specific extensions
Some 3D scene-fileformats have support for extensions. What if the
@ -2004,20 +2011,16 @@ Internet-Draft XR Fragments October 2024
3D engines/frameworks, to initialize specific features when loading a
scene/object, in a progressive enhanced way.
Vendor Prefixes allows embedding 3D engines/framework-specific
features a 3D file via metadata:
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Vendor Prefixes allows embedding 3D engines/framework-specific
features a 3D file via metadata:
+===========+===================+==============================+
| what | XR metadata | Lowest common denominator |
+===========+===================+==============================+
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doc/RFC_XR_Fragments.xml
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@ -1191,7 +1191,15 @@ To apply environment mapping efficiently in a 3D scene, traverse the scene graph
]]>
</artwork>
<t>Most 3D viewers apply one and the same environment map for various models, however this logic
allows a more natural &amp; automatic strategy for reflection mapping.</t>
allows a more natural &amp; automatic strategy for reflection mapping:</t>
<ol spacing="compact">
<li>traverse the scene graph depth-first</li>
<li>remember the most recent parentnode (P) with a texture material</li>
<li>for every non-root node with a texture material
3.1 clone that material (as materials might be shared across objects)
3.2 set the environmentmap to the last known parent texture (P)</li>
</ol>
</section>
<section anchor="transclusion-broken-link-resolution"><name>Transclusion (broken link) resolution</name>

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