static void AddSentinel( TESStesselator *tess, TESSreal smin, TESSreal smax, TESSreal t )
/*
* We add two sentinel edges above and below all other edges,
* to avoid special cases at the top and bottom.
*/
{
TESShalfEdge *e;
ActiveRegion *reg = (ActiveRegion *)bucketAlloc( tess->regionPool );
if (reg == NULL) longjmp(tess->env,1);
e = tessMeshMakeEdge( tess->mesh );
if (e == NULL) longjmp(tess->env,1);
e->Org->s = smax;
e->Org->t = t;
e->Dst->s = smin;
e->Dst->t = t;
tess->event = e->Dst; /* initialize it */
reg->eUp = e;
reg->windingNumber = 0;
reg->inside = FALSE;
reg->fixUpperEdge = FALSE;
reg->sentinel = TRUE;
reg->dirty = FALSE;
reg->nodeUp = dictInsert( tess->dict, reg );
if (reg->nodeUp == NULL) longjmp(tess->env,1);
}
static void AddSentinel( GLUtesselator *tess, GLdouble t )
/*
* We add two sentinel edges above and below all other edges,
* to avoid special cases at the top and bottom.
*/
{
GLUhalfEdge *e;
ActiveRegion *reg = (ActiveRegion *)memAlloc( sizeof( ActiveRegion ));
if (reg == NULL) longjmp(tess->env,1);
e = __gl_meshMakeEdge( tess->mesh );
if (e == NULL) longjmp(tess->env,1);
e->Org->s = SENTINEL_COORD;
e->Org->t = t;
e->Dst->s = -SENTINEL_COORD;
e->Dst->t = t;
tess->event = e->Dst; /* initialize it */
reg->eUp = e;
reg->windingNumber = 0;
reg->inside = FALSE;
reg->fixUpperEdge = FALSE;
reg->sentinel = TRUE;
reg->dirty = FALSE;
reg->nodeUp = dictInsert( tess->dict, reg ); /* __gl_dictListInsertBefore */
if (reg->nodeUp == NULL) longjmp(tess->env,1);
}
