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[fxtf-drafts] [geometry] DOMPointReadonly matrixTransform() is poorly specified

From: Simon Fraser via GitHub <sysbot+gh@w3.org>
Date: Sat, 03 Jun 2017 18:35:55 +0000
To: public-fxtf-archive@w3.org
Message-ID: <issues.opened-233387392-1496514954-sysbot+gh@w3.org>
smfr has just created a new issue for https://github.com/w3c/fxtf-drafts:

== [geometry] DOMPointReadonly  matrixTransform() is poorly specified ==
https://drafts.fxtf.org/geometry/#dom-dompointreadonly-matrixtransform

Step 3 says "Post-multiply point with matrixObject." but what does that mean exactly? Specifically, it's unclear how to handle the w value.

Does it mean just initialize a matrix with the x, y, z, w values as:

`[1 0 0 x]
[0 1 0 y]
[0 0 1 z]
[0 0 w 1]`

and then post-multiply that with 'matrix'?

Please view or discuss this issue at https://github.com/w3c/fxtf-drafts/issues/183 using your GitHub account
Received on Saturday, 3 June 2017 18:36:02 UTC

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