[x3d-public] Texturing3D > RST > handedness > left

Leonard Daly Leonard.Daly at realism.com
Sat Sep 3 17:38:28 PDT 2016

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
President, Daly Realism - /Creating the Future/
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