Introduction

[Noah Vawter]

Hello, everyone.

I'm new. I'm glad I stumbled onto this little project. It looks like
it's off to a good start.

I'm currently a Ph.D. student, researching electronic musical
instruments with built-in electrical generators. As part of the
project, I am curious about browser-based (online and offline) musical
instrument design applications. Your program seems to strike me as
similar to CAD programs like xfig, Illustrator, MAX/MSP, CorelDraw,
etc.

I'm not very experienced with Javascript, but I am interested in
developing JSVE further. Specifically, I'd like to add an "Info"
window like Info(F10) in PhotoShop, or the coords in CorelDraw.

BTW, here is my project's wiki http://exertion.pbworks.com/ and

Here's sneak preview of what I have so far:
http://exertion.pbworks.com/f/1266312338/CoordinateDemo.png

[Kevin]

That's really cool!

[charles thomas]

Hi you want to make you application sensitive to keystrokes.. function changeKey(which, to){     switch (which){         case 65:case 37: key[0]=to; break; // 'traps ASCII A & Left arrow key         case 87: case 38: key[2]=to; break; // up         case 68: case 39: key[1]=to; break; // right         case 83: case 40: key[3]=to; break;// down     } } document.onkeydown=function(e){changeKey((e||window.event).keyCode, 1);}; document.onkeyup=function(e){changeKey((e||window.event).keyCode, 0);}; Regards Charles. --- On Tue, 2/16/10, Kevin <antima...@gmail.com> wrote:

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[Noah Vawter]

That is awesome, Charles.  BTW, do you know how to detect shifted cursor keys?

[charles thomas]

Noah, You can probably trap the keycode you want by playing with the keyboard and this script: http://javascript.internet.com/miscellaneous/ascii-character-code.html Regards Charles http://www.irunmywebsite.com/ --- On Tue, 2/16/10, Noah Vawter <nva...@media.mit.edu> wrote:

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[Kevin]

The event object normally includes a .shiftKey part,

document.onkeydown=function(e){changeKey((e||window.event).keyCode, 1, (e||window.event));};

document.onkeyup=function(e){changeKey((e||window.event).keyCode, 0, (e||window.event));};

function changeKey(which, to, event){

  if(event.shiftKey){

//shifted stuff

[Noah Vawter]

Hello, everyone. 

Here are my diffs and editor.js for a basic implementation of drawing objects' position and size.  I understand my code may be overly simplistic, but if you would please consider including it, then I will continue to streamline it.

In particular, I would like to add angle of rotation to the display, but please help me understand: is this not currently tracked in the object properties?   I just wanted to make sure before I started adding it.

(also, I would like make it reflect the object properties rather than its bounding box, but we'll get there one step at a time)

great project guys, epic potential!  

Sincerely,

Noah

[Kevin]

You can look at the underlying graphics library, raphael: http://raphaeljs.com/reference.html#attr

The rotation is accessible through .attr('rotation')

Does anyone want commit access? I don't really have the time to really do much more to improve the app.

[Noah Vawter]

Yes please, Kevin, what would be very nice of you.

Thank you.

Sincerely,

Noah

[charles thomas]

Noah I'm thinking you need to understand the transformation aspect of SVG. The most complex of which is transform Matrix. Here is a URL to study... http://www.w3.org/TR/SVG/coords.html#TransformAttribute It's about performing all transforms using SVG Matrix math. Sometimes simpler transforms can be used and sometimes the transforms affect a group rather than an individual object. Regards Charles

--- On Wed, 2/17/10, Noah Vawter <nva...@media.mit.edu> wrote:

From: Noah Vawter <nva...@media.mit.edu> Subject: Re: Introduction To: jsvecto...@googlegroups.com

On Feb 16, 2010, at 8:17 AM, Kevin wrote: That's really cool! On Tue, Feb 16, 2010 at 4:29 AM, Noah Vawter <nva...@media.mit.edu> wrote: Hello, everyone. I'm new.  I'm glad I stumbled onto this little project.  It looks like it's off to a good start. I'm currently a Ph.D. student, researching electronic musical instruments with built-in electrical generators.  As part of the project, I am curious about browser-based (online and offline) musical instrument design applications.  Your program seems to strike me as similar to CAD programs like xfig, Illustrator, MAX/MSP, CorelDraw, etc. I'm not very experienced with Javascript, but I am interested in developing JSVE further.  Specifically, I'd like to add an "Info" window like  Info(F10) in PhotoShop, or the coords in CorelDraw. BTW, here is my project's wiki http://exertion.pbworks.com/ and Here's sneak preview of what I have so far: http://exertion.pbworks.com/f/1266312338/CoordinateDemo.png

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