U32 get_box_fan_indices(LLCamera* camera, const LLVector4a& center)
{
LLVector4a origin;
origin.load3(camera->getOrigin().mV);
S32 cypher = center.greaterThan(origin).getGatheredBits() & 0x7;
return cypher*8;
}
BOOL LLOcclusionCullingGroup::earlyFail(LLCamera* camera, const LLVector4a* bounds)
{
if (camera->getOrigin().isExactlyZero())
{
return FALSE;
}
static LLCachedControl<F32> vel("SHOcclusionFudge",SG_OCCLUSION_FUDGE);
LLVector4a fudge(vel*2.f);
const LLVector4a& c = bounds[0];
static LLVector4a r;
r.setAdd(bounds[1], fudge);
/*if (r.magVecSquared() > 1024.0*1024.0)
{
return TRUE;
}*/
LLVector4a e;
e.load3(camera->getOrigin().mV);
LLVector4a min;
min.setSub(c,r);
LLVector4a max;
max.setAdd(c,r);
S32 lt = e.lessThan(min).getGatheredBits() & 0x7;
if (lt)
{
return FALSE;
}
S32 gt = e.greaterThan(max).getGatheredBits() & 0x7;
if (gt)
{
return FALSE;
}
return TRUE;
}