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Prepare the code factorization with the static filter of Do_intersect_3

This commit is contained in:
Laurent Rineau 2012-03-21 13:59:45 +00:00
parent 0e6dbc4b40
commit e940d97a75
1 changed files with 28 additions and 6 deletions
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34
Intersections_3/include/CGAL/internal/Intersections_3/Bbox_3_Segment_3_do_intersect.h
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@ -41,6 +41,16 @@ namespace CGAL {
namespace internal {
template <bool use_static_filters = false>
struct Do_intersect_bbox_segment_aux_is_greater {
typedef bool result_type;
template <typename FT>
bool operator()(const FT& a, const FT& b) const {
return a > b;
}
};
template <typename FT,
bool bounded_0,
bool bounded_1>
@ -257,29 +267,39 @@ namespace internal {
CGAL_assertion(dzmin >= 0);
CGAL_assertion(dzmax >= 0);
typedef Do_intersect_bbox_segment_aux_is_greater<false> Is_greater;
typedef typename Is_greater::result_type Is_greater_value;
Is_greater is_greater;
// If t1 > tymax/dymax || tymin/dymin > t2, return false.
if( py != qy && px != qx) { // dmin > 0, dymax >0, dmax > 0, dymin > 0
if( (dymax* tmin) > ( dmin*tymax) ) return false; // TEST TO FILTER
if( ( dmax*tymin) > (dymin* tmax) ) return false; // TEST TO FILTER
const Is_greater_value b1 = is_greater(dymax* tmin, dmin*tymax);
if(possibly(b1)) return !b1; // if(is_greater) return false; // or uncertain
if( is_greater(dymax* tmin, dmin*tymax) ) return false;
const Is_greater_value b2 = is_greater( dmax*tymin, dymin* tmax);
if(possibly(b2)) return !b2;
}
Is_greater_value b;
// If tymin/dymin > t1, set t1 = tymin/dymin.
if( (px == qx) || // <=> (dmin == 0)
( (py != qy) && // <=> (dymin > 0)
( dmin*tymin) > (dymin* tmin) ) ) // TEST TO FILTER
certainly(b = is_greater( dmin*tymin, dymin* tmin)) ) )
{
tmin = tymin;
dmin = dymin;
}
if(is_indeterminate(b)) return b;
// If tymax/dymax < t2, set t2 = tymax/dymax.
if( (px == qx) || // <=> (dmax > 0)
( (py != qy) && // <=> dymax > 0
(dymax* tmax) > ( dmax*tymax) ) ) // TEST TO FILTER
certainly(b = is_greater(dymax* tmax, dmax*tymax)) ) )
{
tmax = tymax;
dmax = dymax;
}
if(is_indeterminate(b)) return b;
CGAL_assertion(dmin >= 0);
CGAL_assertion(dmax >= 0);
@ -291,8 +311,10 @@ namespace internal {
py != qy ) &&
(pz != qz) ) // dmin > 0, dmax > 0, dzmax > 0, dzmin > 0
{
if( (dzmax* tmin) > ( dmin*tzmax) ) return false; // TEST TO FILTER
if( ( dmax*tzmin) > (dzmin* tmax) ) return false; // TEST TO FILTER
const Is_greater_value b1 = is_greater(dzmax* tmin, dmin*tzmax);
if(possibly(b1)) return !b1; // if(is_greater) return false; // or uncertain
const Is_greater_value b2 = is_greater( dmax*tzmin, dzmin* tmax);
if(possibly(b2)) return !b2; // if(is_greater) return false; // or uncertain
}
return true;
}