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

[Brutzman, Donald (Don) (CIV)]

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

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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