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vector: add is_normalised

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This commit is contained in:
Danny Robson 2015-04-15 13:48:51 +10:00
parent f87481c5e0
commit 6f1278767f
3 changed files with 21 additions and 3 deletions
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9
test/vector.cpp
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@ -64,8 +64,13 @@ test_polar (void)
int
main ()
{
util::TAP::logger test;
test.skip ("convert to TAP");
test_polar ();
util::TAP::logger test;
test.skip ("convert to TAP");
test.expect (!util::vector3f::ZERO.is_normalised (), "zero isn't normalised");
test.expect (!util::vector3f::UNIT.is_normalised (), "unit is normalised");
return test.status ();
}

10
vector.cpp
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@ -71,6 +71,16 @@ util::vector<S,T>::difference2 (const util::vector<S,T> &rhs) const
return sum;
}
///////////////////////////////////////////////////////////////////////////////
template <size_t S, typename T>
bool
vector<S,T>::is_normalised (void) const
{
return almost_equal (magnitude (), 1.f);
}
//-----------------------------------------------------------------------------
template <size_t S, typename T>
util::vector<S,T>&

5
vector.hpp
View File

@ -30,15 +30,18 @@ namespace util {
{
using coord::base<S,T,util::vector,coord::xyzw,coord::stpq>::base;
// vector size
bool is_zero (void) const;
// vector operators
T magnitude (void) const;
T magnitude2 (void) const;
T difference (const vector<S,T>&) const;
T difference2 (const vector<S,T>&) const;
// normalisation
bool is_normalised (void) const;
vector<S,T>& normalise (void);
vector<S,T> normalised [[gnu::warn_unused_result]] (void) const;