OpenGL always reports error

mvt · #1 03-Jun-2004, 10:03

The following code has been reduced to the minimum necessary to produce the error:

CPP / C++ / C Code:

#include <iostream>
#include <FL/Fl.h>
#include <FL/gl.h>

using namespace std;

int main(int argc, char** argv) {
  cout << "error value = " << glGetError() << endl;
  cout << "error value = " << glGetError() << endl;
  cout << "error value = " << glGetError() << endl;
  cout << "error value = " << glGetError() << endl;
  cout << "error value = " << glGetError() << endl;
  cout << "error value = " << glGetError() << endl;
  system("pause");
  return 0;
}

The output is:

Code:

error value = 1282
error value = 1282
error value = 1282
error value = 1282
error value = 1282
error value = 1282
Press any key to continue . . .

My full program produces the desired 3D drawing, except with some texture mapping errors that I am trying to locate using glGetError(). However, no matter where I make the call I get this same error, 1282 = 0x502 = GL_INVALID_OPERATION. Even if I make an OpenGL call that I know is in error and should produce a different error code, I still get this one.

Any ideas?

Thanks,
Mark

mvt · #2 03-Jun-2004, 10:07

I forgot to mention:
I am using the DevC++ compiler environment under WindowsXP and using the FLTK GUI toolkit.

Garth Farley · #3 04-Jun-2004, 07:42

From what little I've seen on this, this is one of those vague errors that pop up for a multitude of reasons. I can suggest is to try updating your graphics drivers, as I've heard some drivers don't get on well with gl.

Invalid Operation errors sound like you're calling something inside glBegin() and glEnd()that you shouldn't be, or somethign outside that should be inside.

I'm afraid I know nothing else to help, so I suggest you visit the www.opengl.org for more expert advice! Sorry

GF

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