Re: your mail

[christos%zoulas.com@localhost (Christos Zoulas)]

On May 25,  3:28pm, bouyer%antioche.eu.org@localhost (Manuel Bouyer) wrote:
-- Subject: Re: your mail

| On Wed, May 25, 2016 at 08:59:12AM -0400, Christos Zoulas wrote:
| > On May 25,  1:36pm, bouyer%antioche.eu.org@localhost (Manuel Bouyer) wrote:
| > -- Subject: 
| > 
| > | Hello,
| > | in xsrc/external/mit/glu/dist/include/GL/glu.h:
| > | revision 1.2
| > | date: 2014/12/19 19:07:46;  author: christos;  state: Exp;  lines: +6 -0
| > | branches:  1.2.2;
| > | use DBL_MAX instead of 1.0e150...
| > | +/* GLdouble is double in gl.h so we are DBL_MAX */
| > | +#include <limits.h>    /* Not a good place to do that, but... */
| > | +#ifndef DBL_MAX
| > |  #define GLU_TESS_MAX_COORD 1.0e150
| > | +#else
| > | +#define GLU_TESS_MAX_COORD DBL_MAX
| > | +#endif
| > | 
| > | can you explain why ?
| > | In libtess, values like -2 * GLU_TESS_MAX_COORD, 4 * GLU_TESS_MAX_COORD
| > | are used, which ends up being +/-inf and causes bad things to happen.
| > 
| > Well, DBL_MAX is supposed to be defined... This was for the vax (it does
| > not fit e150).
| 
| yes it's defined but it's way too large. 2 * DBL_MAX and 4 * DBL_MAX
| both gives inf, and then ((2 * DBL_MAX) < (4 * DBL_MAX)) is false
| when it should be true. Or ((2 * DBL_MAX) == (4 * DBL_MAX)) is
| true when it should be false.

Then we should use DBL_MAX / 32?

christos