ar taninv2 ay, ax
ir taninv2 iy, ix
kr taninv2 ky, kx
Returns the arctangent of iy/ix, ky/kx, or ay/ax. If y is zero, taninv2 returns zero regardless of the value of x. If x is zero, the return value is:
PI/2, if y is positive.
-PI/2, if y is negative.
0, if y is 0.
ky, kx -- control rate signals to be converted
ay, ax -- audio rate signals to be converted
Here is an example of the taninv2 opcode. It uses the files taninv2.orc and taninv2.sco.
Example 1. Example of the taninv2 opcode.
/* taninv2.orc */
/* Written by Kevin Conder */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Instrument #1.
instr 1
; Returns the arctangent for 1/2.
i1 taninv2 1, 2
print i1
endin
/* taninv2.orc */
/* taninv2.sco */
/* Written by Kevin Conder */
; Play Instrument #1 for one second.
i 1 0 1
e
/* taninv2.sco */
instr 1: i1 = 0.464