[x3d-public] Texturing3D > RST > handedness > left (Mantis 978)

[Roy Walmsley]

Doug and Leonard,

 

Yes. I agree. I have now submitted a specification comment and created a
Mantis issue (number 978) for this.

 

Great catch, Doug. Thank you.

 

Regards,

 

Roy

 

From: x3d-public [mailto:x3d-public-bounces at web3d.org] On Behalf Of Leonard
Daly
Sent: 04 September 2016 01:38
To: x3d-public at web3d.org
Subject: Re: [x3d-public] Texturing3D > RST > handedness > left

 

On 9/3/2016 10:30 AM, doug sanden wrote:

http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components
/texture3D.html#Texturecoordinates
"right-handed coordinate system"
should read
"left-handed coordinate system"
?


Doug, this is a good catch.

The text specifies right-handed coordinate system; however, the references
for the coordinate system in Figure 33.1 and text in 33.2.3 that it is
left-handed. A RHS would be (r,s,t), but the text indicates that the
coordinate system is (s,t,r). It appears that the image plane coordinates
are (s,t) and R is the plane layer. The diagram appears to be logically
correct implying a LHS, but that is not consistent with the general use of
RHS throughout X3D.



-- 
Leonard Daly
3D Systems & Cloud Consultant
X3D Co-Chair on Sabbatical
LA ACM SIGGRAPH Chair
President, Daly Realism - Creating the Future 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://web3d.org/pipermail/x3d-public_web3d.org/attachments/20160905/44e6d421/attachment.html>