[x3d-public] Humanoid interface description

[Don Brutzman]

[cc: HAnim list and Dick Puk]

Thanks for your continuing review Andreas.

On 6/28/2018 8:09 PM, Andreas Plesch wrote:
> The Humanoid interface description at
> 
> http://www.web3d.org/documents/specifications/19774-1/V2.0/HAnim/ObjectInterfaces.html#Humanoid
> 
> includes this paragraph:
> 
> 'The jointBindingPositions, jointBindingRotations, and
> jointBindingScales fields specify arrays of positions, rotations, and
> scale values, respectively. These sets of attributes are associated
> with the array of Joint objects contained in the joints field. If only
> one value is provided (such as the default value) then it is applied
> to all listed Joint objects equivalently. Applying each set of these
> translation, rotation, and scale values, in order, to the
> corresponding Joint objects maps a skeleton to the binding pose.'
> 
> I believe there is a small grammar oversight in that a doubled plural
> is used in the first sentence, in 'positions/rotations values'.
> 
> 'The jointBindingPositions, jointBindingRotations, and
> jointBindingScales fields specify arrays of position, rotation, and
> scale values, respectively.' may read better.

agreed.  not yet applied pending resolution of next issue.

> Perhaps more significantly, the last sentence uses 'translation' in
> place of 'position' since only translations can be applied to an
> existing position. Consequently, it seems the field
> 'jointBindingPositions' perhaps should be termed
> 'jointBindingTranslations'.

Great catch.  Am not aware of any good answer to the question "Why is the field called jointBindingPositions instead of jointBindingTranslations?" and so think we should make the change for reasons of clarity, consistency and correctness.

Dick please review.

Myeong Won Lee, please add "Review of Reported HAnim DIS Specification Issues" and we will present it then.  Or perhaps just resolve this one via email to reduce delay if all are agreed.  TIA.

Mantis 1240, "HAnim specification: misnamed field"
http://www.web3d.org/member-only/mantis/view.php?id=1240

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 http://faculty.nps.edu/brutzman