Comments on: Trigonometry in Flash http://www.justgooddesign.com/blog/trigonometry-in-flash.htm Just Blog Fri, 12 Mar 2010 05:17:51 +0000 http://wordpress.org/?v=2.0.5 by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-21347 Mon, 17 Dec 2007 21:23:53 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-21347 // DIRECTION var b:Number = 0; addEventListener ( Event.ENTER_FRAME, loop ); function loop ( e:Event ) { b-= 3 var rad:Number = b * Math.PI / 180; var sin:Number = Math.sin ( rad ); var cos:Number = Math.cos( rad ); var d:String = ( ( sin > 0 && cos > 0 ) || ( cos > 0 && sin < 0 ) ) ? "r" : "l"; trace( d+ " : " + (b)+ " > " + cos + " > " +sin) } // DIRECTION
var b:Number = 0;
addEventListener ( Event.ENTER_FRAME, loop );
function loop ( e:Event )
{
b-= 3

var rad:Number = b * Math.PI / 180;
var sin:Number = Math.sin ( rad );
var cos:Number = Math.cos( rad );
var d:String = ( ( sin > 0 && cos > 0 ) || ( cos > 0 && sin < 0 ) ) ? "r" : "l";
trace( d+ " : " + (b)+ " > ” + cos + ” > ” +sin)
}

]]> by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-2896 Thu, 31 May 2007 22:51:11 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-2896 http://www.kirupa.com/developer/actionscript/trigonometry.htm http://www.senocular.com/flash/source.php?id=0.114 http://www.actionscript.org/resources/articles/155/1/trigonometry-and-flash/Page1.html http://www.peachpit.com/articles/article.asp?p=30617&seqNum=5&rl=1 http://www.kirupa.com/developer/actionscript/trigonometry.htm

http://www.senocular.com/flash/source.php?id=0.114

http://www.actionscript.org/resources/articles/155/1/trigonometry-and-flash/Page1.html

http://www.peachpit.com/articles/article.asp?p=30617&seqNum=5&rl=1

]]> by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-2560 Wed, 23 May 2007 17:38:37 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-2560 Flash 9 - Drawing lines using Circle-Circle Intersection http://www.nocircleno.com/experiments/circle_intercepts/index.html Circle-Circle Intersection http://mathworld.wolfram.com/Circle-CircleIntersection.html Flash 9 - Drawing lines using Circle-Circle Intersection
http://www.nocircleno.com/experiments/circle_intercepts/index.html

Circle-Circle Intersection
http://mathworld.wolfram.com/Circle-CircleIntersection.html

]]> by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1780 Mon, 23 Apr 2007 18:15:16 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1780 http://www.krazydad.com/bestiary/circle.swf http://www.krazydad.com/bestiary/circle.swf

]]> by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1779 Mon, 23 Apr 2007 18:12:15 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1779 http://www.sodaplay.com/index.htm http://www.sodaplay.com/index.htm

]]> by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1778 Mon, 23 Apr 2007 18:11:50 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1778 http://www.gaffer.org/ http://www.gaffer.org/

]]> by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1769 Sun, 22 Apr 2007 22:43:58 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1769 http://www.geocities.com/SiliconValley/2151/math2d.html http://www.geocities.com/SiliconValley/2151/math2d.html

]]> by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1712 Fri, 20 Apr 2007 01:47:30 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1712 http://www.ogre3d.org/docs/api/html/OgreVector2_8h-source.html http://www.ogre3d.org/docs/api/html/OgreVector2_8h-source.html

]]> by: jgraup http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1711 Fri, 20 Apr 2007 01:46:59 +0000 http://www.justgooddesign.com/blog/trigonometry-in-flash.htm#comment-1711 Couple of notes so far. <ol> <li>return { prop: func() }is slower thanvar prop = func(); return {prop:prop}</li> <li>/2 is faster than *.5 - dividing is faster than multiplying to divide</li> <li>my perpoint function is based on scrollbar math, probably just a hack, and my brother points out you should use normalize: pX = somePoint + normalize(p1-p2) * someDistance;.</li> </ol> Couple of notes so far.

  1. return { prop: func() }is slower thanvar prop = func();
    return {prop:prop}
  2. /2 is faster than *.5 - dividing is faster than multiplying to divide
  3. my perpoint function is based on scrollbar math, probably just a hack, and my brother points out you should use normalize: pX = somePoint + normalize(p1-p2) * someDistance;.
]]>