What is the problem that only one function doesn't work when a sketch is exported to Mac or Windows?

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fari

What is the problem that only one function doesn't work when a sketch is exported to Mac or Windows?

in General Discussion • Other • 2 months ago

Hi everyone :)

I have got a lot of functions and classes in my application. When I exported it to Mac and Windows, everything works except one user-defined function. I don't really understand why? It works just fine in Processing IDE.

When this function is called, the entire sketch becomes to a halt. It looks like noLoop() is called. But there isn't any function that would stop execution of the code.

I know it would be sensible to post the code here, but believe me it is a very big application. I am afraid I cannot share it at this time.

I would love to hear the common problems in such cases and how to fix them. I would be glad to provide more information if needed.

Thanks in advance!

Replies(3)

dimkir

Re: What is the problem that only one function doesn't work when a sketch is exported to Mac or Windows?

2 months ago

As there's no source, I can only guess, but here's some hints:

The way Processing works, is that when you run or export your sketch all *.pde files are "glued together" in a large .java file. Which later is compiled. This "gluing" stage is called preprocessing. During that stage Processing preprocessor also does some minuscule conversions and adjustments to your source sketch.

There may be a chance that there's some kind of name confilict of your function (function name is same as some system function) or there's an issue with visibility of your function (after being preprocessed it becomes too visible or smth) or it's overriding something wrong.

But basically you need to find this .java file (see https://forum.processing.org/topic/how-to-access-generated-java-files) and look at your function there. Or if you feel comfortable posting your .java file here or on http://pastebin.com/ if you want to share it only for limited amount of time.

fari

Re: Re: What is the problem that only one function doesn't work when a sketch is exported to Mac or Windows?

2 months ago

After struggling a lot with too much of my code, I solved the problem. It was so surprising! The problem was that I had two conditional statements for the same flag in Draw() method:

For example:

if(FlagA == true) {
//do something
}
if(FlagA == true && FlagB == false) {
//do something else
}

This was understood by Processing. But when the sketch was exported, these two If statements conflicted and resulted in hanging the program.

I spent a lot of time on this problem. But it was a silly mistake.

GoToLoop

Re: What is the problem that only one function doesn't work when a sketch is exported to Mac or Windows?

2 months ago

if they are exclusive, (that is, if 1 happen the other must not), use this following model:

boolean flagA, flagB;

if (flagA & !flagB) {
  // Do thing #2
}

else if (flagA) {
  // Do thing #1
}

However, if they are inclusive, (that is, 2nd one can happen, even if 1st one did too), use this 1 instead:

boolean flagA, flagB;

if (flagA) {
  // Do thing #1

  if (!flagB) {
    // Do thing #2
  }
}

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