Dear list,
I am transcribing some code from C to Pd expressions, and I am wondering
how I might best get the tri function working since it's not native to expr.
I have been using this expression as my triangle function:
(min($v1, 1- $v1) - 0.25) * 4
So for this example:
wave_x = .5-triangle((phasor-9/16)/(2/16))*.5;
I have tried the following, which doesn't function correctly compared
with the original C:
[phasor~ 200]
|
[expr~ ($v1-9./16.)/(2./16.)]
|
[expr~ (0.5 - (min($v1, 1.- $v1) - 0.25) * 4.) * 0.5]
|
[s~ wave_x]
I am quite sure I have made some errors in the syntax somewhere, and I
did trial-and-error many other combinations before arriving at this one.
Would someone more math-literate than me care to help work this out?
SIDENOTE: when is it necessary to force expr~ to consider a number as a
float by using a decimal?
(9/16) doesn't work but (9./16.) does.
((min($v1, 1- $v1) - 0.25) * 4) works regardless of whether the 1 and
the 4 have a decimal point following them or not.
Thanks much!
Derek
--
derek holzer
noise.art.technology
http://macumbista.net
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