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Small optimization.

This commit is contained in:
Dario Manesku 2013-11-13 16:55:07 +01:00
parent c0c62570ea
commit d7647a4cb7
1 changed files with 18 additions and 13 deletions
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31
examples/14-shadowvolumes/shadowvolumes.cpp
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@ -849,20 +849,25 @@ struct Group
{
bool operator()(const f6_t& _a, const f6_t& _b)
{
if (_a.f[0] < _b.f[0]) return true;
if (_a.f[0] > _b.f[0]) return false;
if (_a.f[1] < _b.f[1]) return true;
if (_a.f[1] > _b.f[1]) return false;
if (_a.f[2] < _b.f[2]) return true;
if (_a.f[2] > _b.f[2]) return false;
if (_a.f[3] < _b.f[3]) return true;
if (_a.f[3] > _b.f[3]) return false;
if (_a.f[4] < _b.f[4]) return true;
if (_a.f[4] > _b.f[4]) return false;
if (_a.f[5] < _b.f[5]) return true;
/*if (_a.f[5] > _b.f[5]) return false;*/
const uint8_t t0 = 0
| ( (_a.f[0] < _b.f[0]) << 5)
| ( (_a.f[1] < _b.f[1]) << 4)
| ( (_a.f[2] < _b.f[2]) << 3)
| ( (_a.f[3] < _b.f[3]) << 2)
| ( (_a.f[4] < _b.f[4]) << 1)
| ( (_a.f[5] < _b.f[5]) << 0)
;
return false;
const uint8_t t1 = 0
| ( (_a.f[0] > _b.f[0]) << 5)
| ( (_a.f[1] > _b.f[1]) << 4)
| ( (_a.f[2] > _b.f[2]) << 3)
| ( (_a.f[3] > _b.f[3]) << 2)
| ( (_a.f[4] > _b.f[4]) << 1)
| ( (_a.f[5] > _b.f[5]) << 0)
;
return t0 > t1;
}
};