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Merge branch 'tmj-dev' into lua

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milek7
2017-09-05 20:20:28 +02:00
parent 316584b8d3 2446468038
commit b69a34b157
15 changed files with 254 additions and 179 deletions
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19
usefull.h
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@@ -96,4 +96,23 @@ bounding_box( VecType_ &Mincorner, VecType_ &Maxcorner, Iterator_ First, Iterato
Maxcorner = glm::max( Maxcorner, VecType_{ point } ); } );
}
// finds point on specified segment closest to specified point in 3d space. returns: point on segment as value in range 0-1 where 0 = start and 1 = end of the segment
template <typename VecType_>
typename VecType_::value_type
nearest_segment_point( VecType_ const &Segmentstart, VecType_ const &Segmentend, VecType_ const &Point ) {
auto const v = Segmentend - Segmentstart;
auto const w = Point - Segmentstart;
auto const c1 = glm::dot( w, v );
if( c1 <= 0.0 ) {
return 0.0;
}
auto const c2 = glm::dot( v, v );
if( c2 <= c1 ) {
return 1.0;
}
return c1 / c2;
}
//---------------------------------------------------------------------------