Please pardon a basic question from a beginner about ofLog()

beginners
#1

So I’m very new to OpenFrameworks I have a little background in Processing and I’m wondering how the ofLog() funciton works. I just want to be able to print some values out to the console and it seems like ofLog would do it but I dont understand the parameters its taking and what they are doing for me. Also its not printing anything to the console when i run it. if someone can explain that to me, it would be awesome!

#2

Hi. If you look at the file ofLog.h, you’ll see

  
  
enum ofLogLevel{  
	OF_LOG_VERBOSE,  
	OF_LOG_NOTICE,  
	OF_LOG_WARNING,  
	OF_LOG_ERROR,  
	OF_LOG_FATAL_ERROR,  
	OF_LOG_SILENT	//this one is special and should always be last - set ofSetLogLevel to OF_SILENT to not recieve any messages  
};  
  
//--------------------------------------------------  
void ofSetLogLevel(ofLogLevel logLevel);  
void ofLog(ofLogLevel logLevel, string message);  
void ofLog(ofLogLevel logLevel, const char* format, ...);

With ofSetLogLevel you can set which log events should be displayed (so OF_LOG_VERBOSE, OF_LOG_NOTICE, OF_LOG_WARNING, OF_LOG_ERROR, OF_LOG_FATAL_ERROR or OF_LOG_SILENT)

So you could try something like this

  
  
ofSetLogLevel(OF_LOG_VERBOSE);  
ofLog(OF_LOG_VERBOSE, "I SHOULD BE PRINTED");  
ofSetLogLevel(OF_LOG_ERROR);  
ofLog(OF_LOG_VERBOSE, "I SHOULD NOT BE PRINTED");

But if you only want to have some debugging or whatsoever messages, you can also go with iostream to print something in your console:

  
  
int i=4;  
cout << "the value of i is " << i << endl;

That should print: “the value of i is 4”.

Hope this helps
lg.ph