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$> > 00385(0)915225162 > > --- > [email protected] - the Pure Data mailinglist > https://urldefense.com/v3/__https://lists.iem.at/hyperkitty/list/[email protected]/message/FVTCX5A323GUEEZXZWNLAY5YFNK7GP74/__;!!Mih3wA!DfrXKhsjBltnmdIUutLHu6UcsuMDJK4Q2d1t_PgsPezZ7FFjjwd46jjfXesqm2Rx6ggHKPDjhNKdlmmG$ > > To unsubscribe send an email to [email protected] mailing list > UNSUBSCRIBE and account-management -> > https://urldefense.com/v3/__https://lists.iem.at/__;!!Mih3wA!DfrXKhsjBltnmdIUutLHu6UcsuMDJK4Q2d1t_PgsPezZ7FFjjwd46jjfXesqm2Rx6ggHKPDjhGLejGa2$ --- [email protected] - the Pure Data mailinglist https://lists.iem.at/hyperkitty/list/[email protected]/message/HB5NXTYHAOSMVFG7BAWDEA62HF5W4KXG/ To unsubscribe send an email to [email protected] mailing list UNSUBSCRIBE and account-management -> https://lists.iem.at/
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