[PD] minus; bug or feature?

Frank Barknecht barknech at ph-cip.uni-koeln.de
Mon Apr 15 17:39:13 CEST 2002


Andre Schmidt hat gesagt: // Andre Schmidt wrote:

> uuuups, (how stupid from me)
> yep, i calculated wrong way :)
> 
> but i wanted to subtract x from y (x = dynamic, y = static) so i had
> to bang y every time x changes to get result... or (what i now use,
> THNX) just multiply with -1 (so i dont need to bang y)

A common idiom for this in PD is to use a [t b f] object like in the
attached patch on the left. But beware of the common mistake using
triggers as illustrated on the right.

Ciao,
-- 
                                                 __    __
 Frank Barknecht       ____ ______   ____ __ trip\ \  / /wire ______
                      / __// __  /__/ __// // __  \ \/ /  __ \\  ___\	
                     / /  / ____/  / /  / // ____// /\ \\  ___\\____ \	
                    /_/  /_____/  /_/  /_//_____// /  \ \\_____\\_____\
                                                /_/    \_\ 
-------------- next part --------------
#N canvas 364 323 420 302 10;
#X obj 130 87 t b f;
#X floatatom 70 64 5 0 0;
#X floatatom 130 64 5 0 0;
#X obj 70 146 -;
#X floatatom 70 175 5 0 0;
#X floatatom 254 65 5 0 0;
#X floatatom 314 65 5 0 0;
#X obj 254 147 -;
#X floatatom 254 176 5 0 0;
#X obj 314 104 t b;
#X text 280 33 Don't;
#X text 97 29 Do;
#X connect 0 0 3 0;
#X connect 0 1 3 1;
#X connect 1 0 3 0;
#X connect 2 0 0 0;
#X connect 3 0 4 0;
#X connect 5 0 7 0;
#X connect 6 0 9 0;
#X connect 6 0 7 1;
#X connect 7 0 8 0;
#X connect 9 0 7 0;


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