//----------------------------------------------------------------------------------------------------------------------
float vecAngle(const ngl::Vec3 &_vec1, const ngl::Vec3 &_vec2)
{
// calculate the angle between two vectors using the dot product
float angle;
angle=_vec1.dot(_vec2)/_vec1.length()*_vec2.length();
angle=ngl::degrees(acos(angle));
return angle;
}
Ray::Ray(ngl::Vec3 _origin, ngl::Vec3 _direction)
{
m_origin = _origin;
// check that it is unit length, if not, normalize
if (_direction.length() > 1.1 || _direction.length() < 0.9) {_direction.normalize();}
m_direction = _direction;
}
//----------------------------------------------------------------------------------------------------------------------
ngl::Vec3 lenClamp(ngl::Vec3 io_inVec, const float &_maxLen)
{
// check if given vector is longer than the given maximum
if(io_inVec.length()>_maxLen)
{
// normalize and multiply by the maximum length to clamp
io_inVec.normalize();
io_inVec=io_inVec*_maxLen;
return io_inVec;
}
return io_inVec;
}
void Ray::setDirection(ngl::Vec3 _direction)
{
// check that it is unit length, if not, normalize
if (_direction.length() > 1.1 || _direction.length() < 0.9) {_direction.normalize();}
m_direction = _direction;
}