On Nov 8, 2012, at 9:09 PM, Alexander Burger wrote:
> Hi Jon,
>
>> work to make OpenGl.l a little more complete (lots missing). The problem
>> I have right now, is with glutBitmapCharacter and glutStrokeCharacter;
>> they give me "Segmentation fault", and I suspect they'll fail on Linux
>> as well.
>
> Yes. At least 'glutStrokeCharacter' does.
>
>
> I'm wondering whether (or why)
>
> (glutStrokeCharacter 2 (char "A"))
>
> is correct, as the corresponding C function signature is
>
> void glutStrokeCharacter(void *font, int character);
>
> i.e. '2' is a "pointer".
#if defined(_WIN32)
/* Stroke font constants (use these in GLUT program). */
#define GLUT_STROKE_ROMAN ((void*)0)
#define GLUT_STROKE_MONO_ROMAN ((void*)1)
..
#else
..
#define GLUT_STROKE_ROMAN (&glutStrokeRoman)
#define GLUT_STROKE_MONO_ROMAN (&glutStrokeMonoRoman)
..
#endif
>
>
> I faintly remember I saw this usage before (perhaps in your OpenGl /
> ErsatzLisp code?), and it seems passing '2' as a pointer is legal use.
> But then I have no idea why it crashes.
>
> Cheers,
> - Alex
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