FLASH: greetings

[Damien Morton]

Hi,


	Just heard about this list after months of poring over MM newsgroups trying

to glean information from amongst the endless unanswered questions. I see

from the volume of mail, and the kinds of questions and answers on the list

that I have found the right place.


Heres a little gift, my maths library:


just call Init to set everything up

x is the parameter for sqrt() and sin()

result is the result


Note to any MM Flash developers lurking on this list:

Are numbers represented as strings internally by Flash? If so, then please

fix this

How about exposing basic maths/trig functions for use by ActionScripts

How about exposing matrix math for use by ActionScripts

How about more comprehensive string manipulation functions

How about compound variables for Flash 5, e.g. Lists

How about introspection facilities of some kind


Frame:Init

Set Variable: "a1" = 0.387298334620742

Set Variable: "a2" = 0.5

Set Variable: "a3" = 0.591607978309962

Set Variable: "a4" = 0.670820393249937

Set Variable: "a5" = 0.741619848709566

Set Variable: "a6" = 0.806225774829855

Set Variable: "a7" = 0.866025403784438

Set Variable: "a8" = 0.921954445729288

Set Variable: "a9" = 0.974679434480896

Set Variable: "ex0" = 1

Set Variable: "ex1" = 3.16227766016838

Set Variable: "i" = 2

Loop While (i < 30)

      Set Variable: "ex"&i = eval("ex"&(i-2)) * 10

      Set Variable: "ex"&(i+1) = eval("ex"&(i-1))*10

      Set Variable: "i" = i + 2

End Loop

Stop


Frame:Sqrt

If (x = 1)

      Set Variable: "result" = 1

Else If (x = 0)

      Set Variable: "result" = 0

Else If (x < 1)

      Set Variable: "e" = length(int(1/x))-1

      Set Variable: "n" = x * eval("ex"&(e*2))

      Set Variable: "a" = eval("a"&substring(n, 3, 1))

      Set Variable: "x0" = 0.5 * (a + n/a)

      Set Variable: "x2n" = (x0 * x0) + n

      Set Variable: "result" = (x2n *x2n  + 4 * x0 * x0 * n) / (4 * x0  *

x2n * eval("ex"&e) )

Else

      Set Variable: "e" = length(int(x))

      Set Variable: "n" = x / eval("ex"&(e*2))

      Set Variable: "a" = eval("a"&substring(n, 3, 1))

      Set Variable: "x0" = 0.5 * (a + n/a)

      Set Variable: "x2n" = (x0 * x0) + n

      Set Variable: "result" = eval("ex"&e) * (x2n *x2n  + 4 * x0 * x0 * n)

/ (4 * x0  * x2n)

End If


Frame:Sin

If ((x < -6.28318530718) or (x > 6.28318530718))

      Set Variable: "x" = x - int(x / 6.28318530718)*6.28318530718

End If

Set Variable: "x2" = x * x

Set Variable: "x4" = x2 * x2

Set Variable: "x6" = x2 * x4

Set Variable: "result" = x * (1 - (0.1425234545069255813 * x2) +

(0.0045855159115865352 * x4) + (0.00004163277313164616 * x6)) / (1 +

(0.024143212159741085361 * x2) + (0.000276051271543382738 * x4) +

(.000001595035873773665 * x6))




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