Re: FLASH: anyone written an arctangent function for flash?

[Matt Wobensmith]

Hi Kurt -


You wrote:


>I need arctangent



Try this (taken from www.zincroe.com/flash - "distance" sample):



Comment: one big taylor series to calculate arctan

Set Variable: "x" = input

Set Variable: "arctan" =

x-(x*x*x/3)+(x*x*x*x*x/5)-(x*x*x*x*x*x*x/7)+(x*x*x*x*x*x*x*x*x/9)-(x*x*x*x*x

*x*x*x*x*x*x/11)+(x*x*x*x*x*x*x*x*x*x*x*x*x/13)-(x*x*x*x*x*x*x*x*x*x*x*x*x*x

*x/15)+(x*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x/17)-(x*x*x*x*x*x*x*x*x*x*x*x*x*x*x

*x*x*x*x/19)+(x*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x/21)-(x*x*x*x*x*x*x*x

*x*x*x*x*x*x*x*x*x*x*x*x*x*x*x/23)

Set Variable: "output" = arctan



Fun!


Matt




---------------

Matt Wobensmith

Macromedia


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