/usr/include/glm/gtx/perpendicular.inl is in libglm-dev 0.9.5.1-1.
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// OpenGL Mathematics Copyright (c) 2005 - 2014 G-Truc Creation (www.g-truc.net)
///////////////////////////////////////////////////////////////////////////////////////////////////
// Created : 2005-12-21
// Updated : 2009-03-06
// Licence : This source is under MIT License
// File : glm/gtx/perpendicular.inl
///////////////////////////////////////////////////////////////////////////////////////////////////
namespace glm
{
template <typename vecType>
GLM_FUNC_QUALIFIER vecType perp
(
vecType const & x,
vecType const & Normal
)
{
return x - proj(x, Normal);
}
}//namespace glm
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