Hi Jason, to translate the Wikipedia page:
var c = Math.pow( (1 + Math.sqrt( 5 )) / 2, 2 / Math.PI ); var a = aPositiveRealNumber; // like, 1 // in your loop: var radius = Math.pow( a * c, angle ); var x = Math.cos( angle ) * radius; var y = -Math.sin( angle ) * radius; You keep incrementing angle, obviously. If the spiral seems to go into the wrong direction, remove the minus in the y line. Adjust 'a' to in-/decrease growth. HTH, Mark On 9/10/07, Merrill, Jason <[EMAIL PROTECTED]> wrote: > \I'm no math whiz, does anyone know how I can draw a golden spiral and > position and move sprites/movieClips along a golden spiral path? > > What is a golden spiral? > http://en.wikipedia.org/wiki/Golden_spiral > "In geometry, a golden spiral is a logarithmic spiral whose growth factor b > is related to φ, the golden ratio. Specifically, a golden spiral gets wider > (or further from its origin) by a factor of φ for every quarter-turn it > makes." > > Or a spiral shape in general? I want to position a point along the spiral > based on numerical data. Then as things change, animate the object along the > path of the spiral. I need this to be dynamic, not hand-drawn guide layers. > Anyone know how to translate this math to Actionscript? > > Thanks, > > > Jason Merrill > Bank of America > GT&O Learning & Leadership Development > eTools & Multimedia Team > > > > _______________________________________________ > Flashcoders@chattyfig.figleaf.com > To change your subscription options or search the archive: > http://chattyfig.figleaf.com/mailman/listinfo/flashcoders > > Brought to you by Fig Leaf Software > Premier Authorized Adobe Consulting and Training > http://www.figleaf.com > http://training.figleaf.com >
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