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Re: Proposal for a new Matrix API

From: João Eiras <joaoe@opera.com>
Date: Fri, 21 Oct 2011 17:28:17 +0200
To: public-webapps@w3.org
Message-ID: <op.v3pjxfy52q99of@joaoe>
On Thu, 20 Oct 2011 16:39:56 +0200, Igor Oliveira  
<igor.oliveira@openbossa.org> wrote:

> Hello,
>
> Currently CSSMatrix and SVGMatrix has an immutable API. None of the
> method calls change the Matrix, instead, it creates a new Matrix with
> the changed value. It can be a problem specially when CSSMatrix is
> used together with WebGL. [1]
>

I would suggest that the matrix should not be a host object. Instead is  
should be a pure ecmascript object so it can run closer to the metal (be  
jitted easily).

I did suggest previously extending array a bit, like

{length: 6, height: 2, width:3, 0. ..., 1: ..., 2: ..., 3: ..., 4: ..., 5:  
...,  }

which represents a 2x3 matrix. The matrix would not have any kind of side  
effects or limitations, possibly being of any arbitrary size, hence usable  
not only by graphical APIs, but by any algebra you throw at it.

The methods you suggest, would then be on the prototype, or in the Math  
object.
Received on Friday, 21 October 2011 15:28:56 GMT

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