bool float4::IsPerpendicular(const float4 &other, float epsilonSq) const
{
float dot = Dot(other);
return dot*dot <= epsilonSq * LengthSq() * other.LengthSq();
}
float4 float4::ProjectTo(const float4 &target) const
{
assume(!target.IsZero());
assume(this->IsWZeroOrOne());
return target * (this->Dot(target) / target.LengthSq());
}
