Functions available from code:
abs(value)
  = returns the absolute value of 'value'

sin(value)
  = returns the sine of the radian angle 'value'

cos(value)
  = returns the cosine of the radian angle 'value'

tan(value)
  = returns the tangent of the radian angle 'value'

asin(value)
  = returns the arcsine (in radians) of 'value'

acos(value)
  = returns the arccosine (in radians) of 'value'

atan(value)
  = returns the arctangent (in radians) of 'value'

atan2(value,value2)
  = returns the arctangent (in radians) of 'value'/'value2'

sqr(value)
  = returns the square of 'value'

sqrt(value)
  = returns the square root of 'value'

invsqrt(value)
  = returns the reciprocal of the  square root of 'value' (1/sqrt(value))
    (uses a fast approximation, may not always = 1/sqrt(value) :)

pow(value,value2)
  = returns 'value' to the power of 'value2'

exp(value)
  = returns e to the power of 'value'

log(value)
  = returns the log in base e of 'value'

log10(value)
  = returns the log in base 10 of 'value'

floor(value)
  = returns the largest integer less than or equal to 'value'

ceil(value)
  = returns the smallest integer greater than or equal to 'value'

			"sign(value)
  = returns the sign of 'value' (-1.0 or 1.0, or 0.0 or -0.0 for 0.0 or -0.0)

			"min(value,value2)
  = returns the smallest of 'value' and 'value2'

			"max(var,var2)
  = returns the greatest of 'value' and 'value2'

			"sigmoid(value,value2)
  = returns sigmoid function value of x='value' ('value2'=constraint)

			"rand(value)
  = returns a random integer between 0 and 'value'

			"band(value,value2)
  = returns a boolean AND of 'value' and 'value2'

			"bor(value,value2)
  = returns a boolean OR of 'value' and 'value2'

			"bnot(value)
  = returns a boolean NOT of 'value'

			"if(condition,valtrue,valfalse)
  = returns 'valtrue' if 'condition' is nonzero, returns 'valfalse' otherwise.
    new in AVS 2.8+: only one of valtrue/valfalse is evaluated, depending on condition

			"assign(dest, source)
  = if 'dest' is a variable, assigns the value of 'source' to it. returns the value of 'source'.
    a little trick: assign(if(v,a,b),1.0); is like if V is true, a=1.0, otherwise b=1.0. :)

			"exec2(parm1, parm2)
  = evaluates parm1, then parm2, and returns the value of parm2.

			"equal(value,value2)
  = returns 1.0 if 'value' is equal to 'value2', otherwise returns 0.0

			"above(value,value2)
  = returns 1.0 if 'value' is greater than 'value2', otherwise returns 0.0

			"below(value,value2)
  = returns 1.0 if 'value' is less than 'value2', otherwise returns 0.0

			"getosc(band,width,channel)
  = returns waveform data centered at 'band', (0..1), sampled 'width' (0..1) wide.
    'channel' can be: 0=center, 1=left, 2=right. return value is (-1..1)    

			"getspec(band,width,channel)
  = returns spectrum data centered at 'band', (0..1), sampled 'width' (0..1) wide.
    'channel' can be: 0=center, 1=left, 2=right. return value is (0..1)    

gettime(start_time)
  = returns time in seconds since start_time (start_time can be 0 for time since boot)
    (start_time can be -1.0 for current play time in seconds
    (start_time can be -2.0 for current play length in seconds

getkbmouse(which_parm)
  = returns information about the location and state of the keyboard or mouse
    which_parm = 1: mouse X position (-1..1 is onscreen)
    which_parm = 2: mouse Y position (-1..1 is onscreen)
    which_parm = 3: mouse left button state (0 up, 1 down)
    which_parm = 4: mouse right button state (0 up, 1 down)
    which_parm = 5: mouse middle button state (0 up, 1 down)
    which_parm > 5: (GetAsyncKeyState(which_parm)&0x8000)?1:0

megabuf(index)
  = can be used to get or set an item from the 1 million item temp buffer
    to get, use:   val=megabuf(index);
    to set, use:   assign(megabuf(index),val);

gmegabuf(index)
  = can be used to get or set an item from the global 1 million item buffer
    to get, use:   val=gmegabuf(index);
    to set, use:   assign(gmegabuf(index),val);

loop(count, statement)
  = executes <statement> <count> times. count is evaluated once and clamped
    to 0..4096. best used with exec2() and exec3() and assign(). Note that
    the return value of loop() is undefined and should not be used.