[x3d-public] X3D meeting agenda 18 FEB 2022: SpotLight angles, Volume Rendering component

Thu Feb 17 03:34:18 PST 2022

Nicholas, please also advise what to do with the following issue.  Defer to
v4.1?  Nevertheless seems simple to implement so if it has value, especially
possible medical value as indicated in issue, then please let's consider
adding these fields.

*	Mantis 499: 41.4.8 ProjectionVolumeStyle - add Fields
intensityThresholdFloor, intensityThresholdCeiling
*	https://www.web3d.org/member-only/mantis/view.php?id=499

all the best, Don

-- 

Don Brutzman  Naval Postgraduate School, Code USW/Br        brutzman at nps.edu

Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA    +1.831.656.2149

X3D graphics, virtual worlds, Navy robotics https://
faculty.nps.edu/brutzman

From: Brutzman, Donald (Don) (CIV) <brutzman at nps.edu> 
Sent: Thursday, February 17, 2022 3:18 AM
To: Nicholas Polys <npolys at vt.edu>; Michalis Kamburelis
(michalis.kambi at gmail.com) <michalis.kambi at gmail.com>
Cc: X3D Public Mailing List (x3d-public at web3d.org) <x3d-public at web3d.org>;
Brutzman, Donald (Don) (CIV) <brutzman at nps.edu>
Subject: RE: X3D meeting agenda 18 FEB 2022: SpotLight angles, Volume
Rendering component

Nicholas and Michalis, also need you to reconcile mismatched enumeration
naming within specification:

*	Mantis 867: 41.4.1 BlendedVolumeStyle - Inconsistent enumerations,
ALPHA0 ALPHA1 or ALPHA1 ALPHA2
*	https://www.web3d.org/member-only/mantis/view.php?id=867

all the best, Don

-- 

Don Brutzman  Naval Postgraduate School, Code USW/Br        brutzman at nps.edu
<mailto:brutzman at nps.edu> 

Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA    +1.831.656.2149

X3D graphics, virtual worlds, Navy robotics https://
faculty.nps.edu/brutzman

From: Brutzman, Donald (Don) (CIV) <brutzman at nps.edu
<mailto:brutzman at nps.edu> > 
Sent: Tuesday, February 15, 2022 8:53 PM
To: Nicholas Polys <npolys at vt.edu <mailto:npolys at vt.edu> >; Michalis
Kamburelis (michalis.kambi at gmail.com <mailto:michalis.kambi at gmail.com> )
<michalis.kambi at gmail.com <mailto:michalis.kambi at gmail.com> >
Cc: X3D Public Mailing List (x3d-public at web3d.org
<mailto:x3d-public at web3d.org> ) <x3d-public at web3d.org
<mailto:x3d-public at web3d.org> >; Brutzman, Donald (Don) (CIV)
<brutzman at nps.edu <mailto:brutzman at nps.edu> >
Subject: X3D meeting agenda 18 FEB 2022: SpotLight angles, Volume Rendering
component

0.	Regular Friday meeting 08-0900 Friday, call information below.

Videoconference Connectivity:

*
https://us02web.zoom.us/j/81634670698?pwd=a1VPeU5tN01rc21Oa3hScUlHK0Rxdz09 
*	https://zoom.us/j/148206572  Password 483805 
*	https://www.web3d.org/member/teleconference-information 

1.	Spiraling questions about SpotLight field relationships and default
values, beamwidth and cutoffAngle

*	X3D4 Architecture, Lighting component, clause 17.4.4 SpotLight
*
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/
components/lighting.html#SpotLight

excerpted

SpotLight : X3DLightNode {

  SFFloat [in,out] beamWidth        π/4      (0,π/2]

  SFFloat [in,out] cutOffAngle      π/2      (0,π/2]

}

*	X3D4 Architecture, Lighting component, Figure 17.1 - SpotLight node
*
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/
components/lighting.html#f-SpotLightnode

*	[x3d-public] Defaults of SpotLight.cutOffAngle, beamWidth changed
(maybe by mistake) in X3D 3.3
*
https://web3d.org/pipermail/x3d-public_web3d.org/2022-February/016744.html

*	Mantis 441: 17.4.3 SpotLight -- Default Values (resolved 2009)
*	https://www.web3d.org/member-only/mantis/view.php?id=441

Michalis has agreed to walk us through this.  Goal outcomes for
confirmation:

a.	is figure OK?
b.	Is relationship correct, typically beamWidth <= cutoffAngle
c.	Should we modify default values?
d.	Should we improve prose for clarity?

= = =

2.	Working on Mantis issues for Volume Rendering component

*
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/
Architecture.html

*	X3D4 Architecture, Volume rendering component
*
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-CD1/Part01/
Architecture.html

Nicholas and Michalis: please comment on following issues:

*	Mantis 917: Table 41.7 Volume rendering component support levels -
ShadedVolumeStyle shadows support unclear
*	https://www.web3d.org/member-only/mantis/view.php?id=917

and

*	Mantis 709: 41.4.4 ComposedVolumeStyle - Remove reference to ordered
field
*	https://www.web3d.org/member-only/mantis/view.php?id=709

Can we remove 'ordered' field from table?

= = =

3.	Other topics of group interest. are always welcome.

Membership has value! Please consider joining Web3D Consortium.  

*	https://www.web3D.org/join 

Thanks for all preparations and inputs.  Have fun with X3D!   8)

all the best, Don

-- 

Don Brutzman  Naval Postgraduate School, Code USW/Br        brutzman at nps.edu
<mailto:brutzman at nps.edu> 

Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA    +1.831.656.2149

X3D graphics, virtual worlds, Navy robotics https://
faculty.nps.edu/brutzman

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