Comments on: What are you doing with Sylvester? http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/ This dirt was a building before Thu, 29 Jul 2010 06:08:58 +0000 hourly 1 http://wordpress.org/?v=3.0.1-alpha-15443 By: Lanza (nextime) Franco http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/comment-page-1/#comment-4371 Lanza (nextime) Franco Thu, 03 Jun 2010 22:57:20 +0000 http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/#comment-4371 I'm considering to use sylvester to write a js library to manipulate astronomic fits images and to build a fits image viewer/reduction web based software. Thanks for your work! I’m considering to use sylvester to write a js library to manipulate astronomic fits images and to build a fits image viewer/reduction web based software. Thanks for your work!

]]> By: Zoltan Hawryluk http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/comment-page-1/#comment-4297 Zoltan Hawryluk Tue, 09 Mar 2010 11:44:32 +0000 http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/#comment-4297 I have been using Sylvester do make <a href="http://www.w3.org/TR/css3-2d-transforms/" rel="nofollow">CSS3 transform property</a> work in Internet Explorer 6+ like it does in the other top browsers. Sylvester has <strong>really</strong> shortened the amount of development work and I thank you. If you are interested in the result of my work, please see my article, <a href="http://www.useragentman.com/blog/2010/03/09/cross-browser-css-transforms-even-in-ie/" rel="nofollow">Cross Browser CSS Transforms – even in IE</a>. I have been using Sylvester do make CSS3 transform property work in Internet Explorer 6+ like it does in the other top browsers. Sylvester has really shortened the amount of development work and I thank you.

If you are interested in the result of my work, please see my article, Cross Browser CSS Transforms – even in IE.

]]> By: Jan Theodore Galkowski http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/comment-page-1/#comment-3460 Jan Theodore Galkowski Wed, 04 Mar 2009 15:49:16 +0000 http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/#comment-3460 What would be really cool is if the Matrix class had methods for SVD and QR decomposition as well. I may take that on, but I can't promise any kind of schedule. What would be really cool is if the Matrix class had methods for SVD and QR decomposition as well.

I may take that on, but I can’t promise any kind of schedule.

]]> By: Jan Theodore Galkowski http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/comment-page-1/#comment-3459 Jan Theodore Galkowski Tue, 03 Mar 2009 21:47:15 +0000 http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/#comment-3459 It's always nice to find a sensibly implemented package for numerics in another, popular language. There are just too few of them out there. That's why quant wonks like me tend towards R or even C because there are well-vetted libraries. In my case, Sylvester is being tried as a means of implementing spatial algorithms designed in and for R in ActionScript, often supporting displays and the like. It’s always nice to find a sensibly implemented package for numerics in another, popular language. There are just too few of them out there. That’s why quant wonks like me tend towards R or even C because there are well-vetted libraries.

In my case, Sylvester is being tried as a means of implementing spatial algorithms designed in and for R in ActionScript, often supporting displays and the like.

]]> By: orion elenzil http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/comment-page-1/#comment-3363 orion elenzil Thu, 20 Nov 2008 00:46:24 +0000 http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/#comment-3363 i'm thinking of implementing Kass and Miller's 1991 paper "Rapid, Stable Fluid Dynamics for Computer Graphics" in javascript, and i've finally tired of one-offing my vector routines for every little app, so i'll be looking at Sylvester. especially since the paper deals with an arbitrary nxn matrix. hmm, although it only has values in the main diagonal and the two adjacent diagonals, so custom code is probably called for anyhow. i was wondering if sylvester is optimized at all for the common matrix sizes: 2x2, 3x3, and 4x4. while nxm is certainly nice to have available, making those base cases speedy would be nice as well. i’m thinking of implementing Kass and Miller’s 1991 paper “Rapid, Stable Fluid Dynamics for Computer Graphics” in javascript, and i’ve finally tired of one-offing my vector routines for every little app, so i’ll be looking at Sylvester. especially since the paper deals with an arbitrary nxn matrix. hmm, although it only has values in the main diagonal and the two adjacent diagonals, so custom code is probably called for anyhow.

i was wondering if sylvester is optimized at all for the common matrix sizes: 2×2, 3×3, and 4×4. while nxm is certainly nice to have available, making those base cases speedy would be nice as well.

]]> By: Michael Deal http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/comment-page-1/#comment-3023 Michael Deal Fri, 14 Mar 2008 09:50:18 +0000 http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/#comment-3023 I've enjoyed this package as well :) I’ve enjoyed this package as well :)

]]> By: Chris Cavanagh http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/comment-page-1/#comment-2457 Chris Cavanagh Fri, 11 Jan 2008 05:41:03 +0000 http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/#comment-2457 James, I'm working on using Sylvester with Silverlight 1.0. Any further improvements you do would be much appreciated! James,

I’m working on using Sylvester with Silverlight 1.0. Any further improvements you do would be much appreciated!

]]> By: Vladimir Vukicevic http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/comment-page-1/#comment-2367 Vladimir Vukicevic Thu, 03 Jan 2008 09:19:22 +0000 http://blog.jcoglan.com/2007/11/28/what-are-you-doing-with-sylvester/#comment-2367 Hey James, I've used Sylvester in some Canvas 3D demos -- see http://blog.vlad1.com/2007/11/26/canvas-3d-gl-power-web-style/ -- and it's worked out quite well for me as-is. I added a few helper functions to get matrices out in slightly different object layouts, but no issues other than that. Unfortunately I haven't had time to do much C3D-related work for a while, but I hope to get back to it soon. I disagree with you that a 3D engine written in JavaScript will never perform as well as native code, though; if you have access to native 3D acceleration (through OpenGL or a similar API), you should eventually be able to get very close to native performance with a good enough JS JIT/interpreter. Conveniently, Mozilla's working on such a beast as part of the Tamarin/ES4 work. :) Hey James,

I’ve used Sylvester in some Canvas 3D demos — see http://blog.vlad1.com/2007/11/26/canvas-3d-gl-power-web-style/ — and it’s worked out quite well for me as-is. I added a few helper functions to get matrices out in slightly different object layouts, but no issues other than that. Unfortunately I haven’t had time to do much C3D-related work for a while, but I hope to get back to it soon.

I disagree with you that a 3D engine written in JavaScript will never perform as well as native code, though; if you have access to native 3D acceleration (through OpenGL or a similar API), you should eventually be able to get very close to native performance with a good enough JS JIT/interpreter. Conveniently, Mozilla’s working on such a beast as part of the Tamarin/ES4 work. :)

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