Hey,

I have some problems in PD (again).
I attached a patch that is not everything I made, but I deleted everything that does not beong to my problem.

I want to change the volume by a color controlled detection. That is made with processing and the information is send via OSC to pd. These are numbers between 0 and 240. The transmission is made by "/y".

BUT the volume should only be changable when it is activated by chlicking that key "n". I solved all the things till this moment. But if the n is pressed again the last number that was transmitted should be fixed. I tried to use a toogle, but after it was deactivated the toggle sends 0 and so the volume is 0.

In other programming languages I would you if then else expressions and a variable that saves the number, but no idea how to this in PD.

The patch is maybe a bit complicated, because I tried things that didn´t work, but I didn´t deleted them to show you what I´ve tried. Hope the patch is useful.

Thanks a lot,
Anna

http://www.pdpatchrepo.info/hurleur/patch2.pd

In Pd, there is [expr] object that works the best for such operations. For example:

[expr $f1;
if ($f1 < 0, ($f1+5) * 2, 0);
if ($f1 > 0, $f1 * 2, 0)]

It is explained as:
For the variable $f1;
if $f1 is smaller than 0, then add 5 and multiply the sum by 2, else 0;
if $f1 is bigger than 0, then multiply by 2, else 0.

When you put this formula into [expr], you will see three outlets, first one simply outputs the variable number without any applying any operation, second one is the second line, and so on.

Hi,
thanks a lot for the really fast help.

That looks really good! I just tried a bit and I think that could handle my problem.
But one question to the expr object: Is it possible to have more than one input variable? I searched in the help files but I havn´t found an example like that.

I want a variable for the toggle and one for the incoming numbers.
"if toggle = 1, number/240, the last checked number"

Thanks a lot!

of course: $f1, $f2 ,...
for example, the following expr would multiply the values at the first inlet with those at the second inlet:

[expr $f1*$f2]

by the way: ony the first inlet bangs a calculation, so you'd have to send bangs to first inlet, if you change the values for $f2 (with [t b f] for example...)

@Keiko said:

Hi,
thanks a lot for the really fast help.

That looks really good! I just tried a bit and I think that could handle my problem.
But one question to the expr object: Is it possible to have more than one input variable? I searched in the help files but I havn´t found an example like that.

I want a variable for the toggle and one for the incoming numbers.
"if toggle = 1, number/240, the last checked number"

Thanks a lot!

what do you mean with "last checked number"? if it should just pass the numbers in case the toggle is NOT 1, then this would be the expr you are searching , i guess:

[expr if ($f1==1, $f2/240, $f2)]

(where $f1 is the inlet for the toggle and $f2 is the inlet for the numbers)

Hi,
thanks for the answers.
I tried to work that out and attached a very small patch that tests what toxonic wrote.

It´s getting better, but it´s still not exactly what I want.

What it does now:
if I change the number (right inlet) and then activate the toggle, it divides the number 240. But if the toggle is still activated and I change the number it does nothing until I deactivate the toggle and activate it again.
Another problem: If I deactivate the toggle the number is send.

What I want it to do:
At the moment I deactivate the toggle the last number with the activated toggle should be fixed.
For example:
The number is 120 and the toggle is activated, the outlet gives 0.5. After deactivating the toggle it should still be 0.5 no matter if I change the number or not.
AND the outlet should be changable by changing the number at the moment when the toggle is activated.

Is that possible?
It looks much better now, thanks.
I thought I have to declare the variables before using that, but it works, not correctly, but I´m working on that.

Thx,
Anna

http://www.pdpatchrepo.info/hurleur/patch3.pd

See the updated version of your patch with comments.

http://www.pdpatchrepo.info/hurleur/patch3_updated-1.pd

Hi,
thanks for your work.
I read the comments and I will have a deeper look into the topics you mentioned.

Should the patch as you attached it work? Because now it does the operation (devide with 240) always... it does not check the toggle I think.

You both don´t know how much you help me

if i got you right now, you only want to output the result of the calculation x/240 in case the toggle is switched on, right? then you won't need the [expr] object, you can fix that with spigot. see the attachment, hope that's what you wanted...

http://www.pdpatchrepo.info/hurleur/patch3_updated-2.pd

Wow, it´s only one object and it does exactly what I want.

Thanks a lot.
On the one hand it works, and on the other hand I learned how to work with variables

thankful regards,
Anna

i asked myself i you may wanted to change the numbers, while the toggle is off and then, when switching it on again it should output the actual result!? if so, you should take a look at this patch:

http://www.pdpatchrepo.info/hurleur/patch3_updated-3.pd

Hey,

thanks a lot for your help.
After some time I made a big patch. I used the last one you posted to make it work, thanks for that.

But now I mentioned that I need to send two numbers (variables) via OSC over a network to another PC.

A attached another really small patch to show what I want to do.
I don`t know how to tell PD what /key and /keyname is.
I looked at the helpfile, but it didn´t solved this question. I also found this post:
http://puredata.hurleur.com/sujet-2942-osc-messages
But there I can´t find a variable like mine.

I hope you can help me (hopefully the last time, I need it ).

http://www.pdpatchrepo.info/hurleur/osc.pd

i don't know nothing about osc and don't have a second computer to check how the patch is working, but maybe check out the attached modification of your patch and see if it's working.

edit: tried it out again with a localhost connection. i must concede, i don't really got the OSC objects, but this way it should be possible to get it to work. i deleted my last patch and attached the new one.

http://www.pdpatchrepo.info/hurleur/osc.pd

That looks great. I will use this kind of patch in my version.

Thanks a lot