[OASIS Issue Tracker] Commented: (OFFICE-2854) 18.3.39 Vector3D -normalized?

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    [ http://tools.oasis-open.org/issues/browse/OFFICE-2854?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=19576#action_19576 ] 

Dennis Hamilton commented on OFFICE-2854:
-----------------------------------------

I suspect that, in this context,normalized means a vector of unit length.  That is, the x, y, and z coordinates of the end-point are transformed so that the vector length is 1, but the direction from the origin (0,0,0) is unchanged.  That is what it usually means to normalize a vector.

Since it only says "should," this is also not a particularly significant distinction, and consumers for which it is important will need to conduct the normalization with whatever vector is given.

A normal vector is, in one usage, one that defines the direction of lines that pass perpendicularly through a surface at a given point on the surface.  (If the surface is a plane, all of the normals are parallel to each other.)

Edge case: Life is not good when x = y = z = 0.  There must be at least one non-zero coordinate (whether positive or negative).

> 18.3.39 Vector3D - normalized? 
> -------------------------------
>
>                 Key: OFFICE-2854
>                 URL: http://tools.oasis-open.org/issues/browse/OFFICE-2854
>             Project: OASIS Open Document Format for Office Applications (OpenDocument) TC
>          Issue Type: Bug
>    Affects Versions: ODF 1.2 Part 1 CD 5
>            Reporter: Patrick Durusau
>             Fix For: ODF 1.2 Part 1 CD 5
>
>
> Now reads: " If this value represents a normal, then it should be normalized."
> normal in our 3D attributes says: "only the front sides of planes are displayed."
> Ignoring that we use "normal" to mean several other things, I don't know what it means here? 
> Clearly the language implies some operation on the x,y,z coordinates but it isn't clear what that operation would be. 

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