F32 Aabb::testPlane(const Plane& p) const
{
const Aabb& aabb = *this;
#if ANKI_SIMD == ANKI_SIMD_SSE
__m128 gezero = _mm_cmpge_ps(p.getNormal().getSimd(), _mm_setzero_ps());
Vec4 diagMin;
diagMin.getSimd() =
_mm_or_ps(_mm_and_ps(gezero, aabb.getMin().getSimd()), _mm_andnot_ps(gezero, aabb.getMax().getSimd()));
#else
Vec4 diagMin(0.0), diagMax(0.0);
// set min/max values for x,y,z direction
for(U i = 0; i < 3; i++)
{
if(p.getNormal()[i] >= 0.0)
{
diagMin[i] = aabb.getMin()[i];
diagMax[i] = aabb.getMax()[i];
}
else
{
diagMin[i] = aabb.getMax()[i];
diagMax[i] = aabb.getMin()[i];
}
}
#endif
// minimum on positive side of plane, box on positive side
ANKI_ASSERT(diagMin.w() == 0.0);
F32 test = p.test(diagMin);
if(test > 0.0)
{
return test;
}
#if ANKI_SIMD == ANKI_SIMD_SSE
Vec4 diagMax;
diagMax.getSimd() =
_mm_or_ps(_mm_and_ps(gezero, aabb.getMax().getSimd()), _mm_andnot_ps(gezero, aabb.getMin().getSimd()));
#endif
ANKI_ASSERT(diagMax.w() == 0.0);
test = p.test(diagMax);
if(test >= 0.0)
{
// min on non-positive side, max on non-negative side, intersection
return 0.0;
}
else
{
// max on negative side, box on negative side
return test;
}
}
//==============================================================================
F32 Aabb::testPlane(const Plane& p) const
{
const Aabb& aabb = *this;
Vec4 diagMin(0.0), diagMax(0.0);
// set min/max values for x,y,z direction
for(U i = 0; i < 3; i++)
{
if(p.getNormal()[i] >= 0.0)
{
diagMin[i] = aabb.getMin()[i];
diagMax[i] = aabb.getMax()[i];
}
else
{
diagMin[i] = aabb.getMax()[i];
diagMax[i] = aabb.getMin()[i];
}
}
// minimum on positive side of plane, box on positive side
F32 test = p.test(diagMin);
if(test > 0.0)
{
return test;
}
test = p.test(diagMax);
// min on non-positive side, max on non-negative side, intersection
if(test >= 0.0)
{
return 0.0;
}
// max on negative side, box on negative side
else
{
return test;
}
}
