Re: [expr ] help needed

it works here, double check your order of operations:

#N canvas 131 195 450 300 12;
#X msg 119 70 1 0 1.5708;
#X floatatom 119 140 15 0 0 0 - - - 0;
#X floatatom 361 137 5 0 0 0 - - - 0;
#X obj 119 95 expr ($f1*cos($f3))-($f2*sin($f3)) \;
($f1*sin($f3))+($f2*cos($f3));
#X connect 0 0 3 0;
#X connect 3 0 1 0;
#X connect 3 1 2 0;

Antoine


Le dim. 14 déc. 2025 à 11:56, Hrvoje Radnic via Pd-list <
[email protected]> a écrit :

> Thank you Miller for your suggestion. I don't think that's the case, I
> checked the order of operations with [print] and everything looks like it
> should. I even made the signal version of the whole [expr] computation in
> order to bypass the possibility of wrong order and the result is repeated
> there as well. So, it must be math inside [expr], but I really struggle to
> find any clue.
>
> Hrvoje Radnic
>
> https://www.instagram.com/singlecycled/
>
> https://pdvrecords.bandcamp.com/album/umovi-protiv-valova
> https://soundcloud.com/sumovi-protiv-valova
> 00385(0)915225162
>
>
> On Saturday, November 29, 2025 at 04:40:48 PM GMT+1, Miller Puckette via
> Pd-list <[email protected]> wrote:
>
>
> Are you by any chance updating x before running the y calculation? If
> you do that, y will be
> calculated using the updated x and not the correct (original) one.
>
> cheers
> Miller
>
> On 11/29/25 6:49 AM, Hrvoje Radnic via Pd-list wrote:
> > Dear group,
> >
> > I cannot figure out why the calculations inside
> >  [expr (x*cos(theta))-(y*sin(theta));
> > (x*sin(theta))+(y*cos(theta))] gives me wrong results.
> >
> > The above mentioned formula for rotation is correct. I initialize the
> > values through [value] object before preforming computation. The
> > initial values are: x=1, y=0, theta=1/2pi. I expect  the new x and new
> > y to be (0,1) respectively after the rotation. But, for some reason, I
> > get (-1,1). I checked the help files for [value] and [expr] and it
> > looks like I am doing everything right.
> > Anyone have an idea where's the mistake?
> > Thank you!
> > Hrvoje Radnic
> >
> > https://www.instagram.com/singlecycled/
> > <
> https://urldefense.com/v3/__https://www.instagram.com/singlecycled/__;!!Mih3wA!DfrXKhsjBltnmdIUutLHu6UcsuMDJK4Q2d1t_PgsPezZ7FFjjwd46jjfXesqm2Rx6ggHKPDjhNcNbhmE$
> >
> >
> > https://pdvrecords.bandcamp.com/album/umovi-protiv-valova
> > <
> https://urldefense.com/v3/__https://pdvrecords.bandcamp.com/album/umovi-protiv-valova__;!!Mih3wA!DfrXKhsjBltnmdIUutLHu6UcsuMDJK4Q2d1t_PgsPezZ7FFjjwd46jjfXesqm2Rx6ggHKPDjhEqqX9g8$
> >
> > https://soundcloud.com/sumovi-protiv-valova
> > <
> https://urldefense.com/v3/__https://soundcloud.com/sumovi-protiv-valova__;!!Mih3wA!DfrXKhsjBltnmdIUutLHu6UcsuMDJK4Q2d1t_PgsPezZ7FFjjwd46jjfXesqm2Rx6ggHKPDjhLRt9iry$
> >
> > 00385(0)915225162
> >
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