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:
π/2, if y is positive.
-π/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 454. 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