Use command line instructions in sketch

daGom

Hello everyone,

I'm trying to use https://github.com/fogleman/primitive go sketch for image. I've set it up on my mac environment I'd like to add some feature via processing.

Would it be possible to have the following sequence :

1 - Capture camera pic via processing (I know it is and how :)

2 - run the go program via command line in my sketch, in order to process the captured pic #1. Result is stored in folder on my harddrive.

3 - display the result as output of #2 and add a funny message.

The only isssue is #2 as the other steps are classical processing made.

Regards

TfGuy44

Use exec().

exec
public static Process exec(String... args)
Pass a set of arguments directly to the command line. Uses Java's Runtime.exec() method. This is different from the launch() method, which uses the operating system's launcher to open the files. It's always a good idea to use a full path to the executable here.
 exec("/usr/bin/say", "-v", "Pipe Organ", "welcome to the command line");

Or if you want to wait until it's completed, something like this:
 Process p = exec("/usr/bin/say", "waiting until done");
 try {
   int result = p.waitFor();
   println("the process returned " + result);
 } catch (InterruptedException e) { }

You can also get the system output and error streams from the Process object, but that's more that we'd like to cover here.
Returns:
a Process object

http://processing.github.io/processing-javadocs/core/

https://processing.org/reference/launch_.html

daGom

Hello TfGuy44

and sorry for the late answer

... I think reading the output and error streams would be helpful my process calls returns nothing. If I set up the waiter like you suggested, it ends up with return 1 as int return value, but still nothing happens really

just a catch catch (IOException e) { System.err.println(e); } returned two numbers. Respectivly 56 and 95

daGom

Working my way through with https://forum.processing.org/one/topic/execute-terminal-commands-again.html

koogs

pointlessly continued here:

https://forum.processing.org/two/discussion/23085/use-command-line-instructions-in-sketch

koogs

alright, it's here:

https://forum.processing.org/two/discussion/23085/use-command-line-instructions-in-sketch

THIS IS WHY we try to keep all the information in one place and not start pointless duplicate threads.

in the babash script try adding a 2>/tmp/errors to capture stderr, see if it prints anything. you could also call env to get it to print the environment if you think something is missing