Debugging OpenGL code

OpenGL Development
#1

I’m writing a Batcher currently and having nothing displayed on the screen. I haven’t understood what’s the problem, I’ve rewritten the class more than a 20 times and still the same result. So I’ve tried using [icode]glGetError()[/icode] and put calls to it after every call to a opengl function and set break-points on those instances. The output said that there are errors when I’m updating the VBOs, so here is my code where I update my VBOs.


glBindBuffer(GL_ARRAY_BUFFER, vboVertID);
checkForErrors();
glBufferSubData(GL_ARRAY_BUFFER, 0, vBuffer);
checkForErrors();// Unacceptable value, Specified operation is not allowed in current state
        
glBindBuffer(GL_ARRAY_BUFFER, vboNormID);
checkForErrors();// Numeric argument is out of range
glBufferSubData(GL_ARRAY_BUFFER, 0, nBuffer);
checkForErrors();
        
glBindBuffer(GL_ARRAY_BUFFER, vboColID);
checkForErrors();// Numeric argument is out of range
glBufferSubData(GL_ARRAY_BUFFER, 0, cBuffer);
checkForErrors();
        
glBindBuffer(GL_ARRAY_BUFFER, vboTexID);
checkForErrors();// Numeric argument is out of range
glBufferSubData(GL_ARRAY_BUFFER, 0, tBuffer);
checkForErrors();

And my method to print the error messages is


public void checkForErrors()
{
    int error = GL_NO_ERROR;
        
    while ((error = glGetError()) != GL_NO_ERROR)
    {
        switch (error)
        {
            case GL_INVALID_ENUM:
                System.err.println("An unacceptable value is specified for an enumerated argument.");
                break;
            case GL_INVALID_VALUE:
                System.err.println("A numeric argument is out of range.");
                break;
            case GL_INVALID_OPERATION:
                System.err.println("The specified operation is not allowed in the current state.");
                break;
            default:
                System.err.println("Unknown OpenGL Error");
        }
    }
}

I’m now confused on where the error is. The complete class is here.

Thanks.