taninv2 — Returns an arctangent.
ares taninv2 ay, ax
ires taninv2 iy, ix
kres 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 file taninv2.csd.
Example 384. Example of the taninv2 opcode.
See the sections Real-time Audio and Command Line Flags for more information on using command line flags.
<CsoundSynthesizer>
<CsOptions>
; Select audio/midi flags here according to platform
; Audio out Audio in
-odac -iadc ;;;RT audio I/O
; For Non-realtime ouput leave only the line below:
; -o taninv2.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>
; 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
</CsInstruments>
<CsScore>
; Play Instrument #1 for one second.
i 1 0 1
e
</CsScore>
</CsoundSynthesizer>
Its output should include a line like this:
instr 1: i1 = 0.464