osPid front end 3870e68 compile problem

[Brett]

#3564

the frontend was written using controlP5 v0.5. newer versions of controlp5 do not seem to be backwards compatible. try using this version from their google code site.

[Brett]

#3894

it was built for windows, but I thought I had taken care of all those “” by using file.separator instead. where are you getting your error?

[ragaRew]

#3895

I couldn’t see the question to you about the compile problem, but I’m getting the same problem.

When I compile the processing script, I get a null pointer exception in call to ReadProfiles().

I believe this is because the call in osPID_FrontEnd
ReadProfiles(curDir+ File.separator + “profiles”);
contains a null string – String curDir = System.getProperty(“user.dir”);

If I place a copy of the profiles directory at c: and change the offending line to
String curDir = “c:”;

it compiles and runs correctly.

I have experimented with System.getProperty(“user.dir”) in other programs and it works fine. I have installed the code in several different directories with same result.

Thx,
Mike

[hairykiwi]

#3896

I’m experiencing the same problem. ragaRew’s solution works, but maybe this shed’s some light on the source of the problem.

in osPID_FrontEnd.pde (in a folder D:osPID_FrontEnd)
I inserted

System.out.println(System.getProperty("user.dir"));

just before:

    String curDir = System.getProperty("user.dir");

Then, (click run and) in the processing IDE console window, just before the null pointer debug message(s) it prints your ‘user directory’:

D:Processingprocessing-1.5.1 – i.e. the location of processing.exe

So it seems that the “user.dir” is the directory of processing.exe, not the sketch (osPID_FrontEnd.pde) folder.

Perhaps the getProperty(“user.dir”) needs to be replaced with either getMainFilePath() or getFolder() method?
as detailed here:
http://processing.googlecode.com/svn/trunk/processing/build/javadoc/everything/processing/app/Sketch.html#getPrimaryFile%28%29
But using Processing v1.5.1 those methods are not recognised – and Processing is completely new to me.

I’ll try and find a solution, but Brett will be way more up to speed on this stuff than me.

BTW, thanks Brett/Lim – I’m really enjoying playing with osPID for controlling my Rancilio Silvia coffee machine. Will post some pics of that real soon.

[hairykiwi]

#3897

I just discovered Brett already posted the solution to this problem in the following thread:
viewtopic.php?f=4&t=266&p=407#p407 (The one dated Mon Apr 30, 2012 5:19 pm)
In it, he says, ‘…you’ll need to copy the “profiles” folder to the folder containing your processing.exe’

After some searching, I still don’t understand why the methods getMainFilePath() or getFolder(), which appear in the code linked to in my previous post, are not available in processing version 2.0b3 (Java). Any ideas?

– Hamish

[Author]

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