RE: [cgmo-webcgm] What to do with WebCGMMatrix

[Lofton Henderson <lofton@rockynet.com>]

I tend to agree with Dieter, although I am not an
experienced practitioner in DOM programming.

However, I also have a procedural/timing concern.  I'm thinking that
this is not best timing to discuss removing getTransform() -- unless
everyone were enthusiastically unanimous to do so -- as we are trying to
prepare CD02 text.  (Recall that there are small windows for
technical adjustment in the WG; and then the TC approves any substantive
changes when the work comes back from the W3C.)

If we don't remove the getTransform() now, then we need to have a
parameterization of the return value.  Which means either array
matrix[6] or interface WebCGMMatrix.  (Rob has concerns about
whether such return type as matrix[6] is supported by IE, regardless of
whether it is valid in IDL and ECMAScript.)

Let's discuss further (on Wednesday, if not here).

-Lofton.

At 02:39 PM 6/9/2008 -0400, Weidenbrueck, Dieter wrote:

Benoit,
 
I think it is needed. If you request the current transform of an object you have no idea what it might be, and very easily it may be a complex matrix resulting from multiple transforms (in fact, this should be the default case for even a simple rotation).
So if you want to concatenate transforms (e.g. a rotation) and be able to restore the result before the concatenation, you can only use a matrix IMO.
 
Regards,
Dieter

---

From: Bezaire, Benoit [mailto:bbezaire@ptc.com]
Sent: Montag, 9. Juni 2008 13:58
To: cgmo-webcgm@lists.oasis-open.org
Subject: [cgmo-webcgm] What to do with WebCGMMatrix

Hi All,
 
I honestly don't know if we need WebCGMMatrix. The methods (translate, rotate, scale, matrix) may not the "prettiest" from a coding stand-point, but I think they get the job done.
 
Personally, I think very few users will use matrix() and getTransform(), so I don't know if it justifies a new WebCGMMatrix interface.
 
I think it makes more sense to add a WebCGMRect interface than a WebCGMMatrix interface.
 
Thoughts on this?
 
If many of you want WebCGMMatrix in, I can add it; but I get the impression I'm alone on this one.
 
Benoit.

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