StelUtils.hpp   StelUtils.hpp 
skipping to change at line 258 skipping to change at line 258
return M_PI_2 - (x + x*x*x * (1.f/6.f + x*x * (3.f/40.f + 5. f/112.f * x*x)) ); return M_PI_2 - (x + x*x*x * (1.f/6.f + x*x * (3.f/40.f + 5. f/112.f * x*x)) );
} }
//! Compute exp(x) for small exponents x //! Compute exp(x) for small exponents x
inline float fastExp(float x) inline float fastExp(float x)
{ {
return (x>=0)? return (x>=0)?
(1.f + x*(1.f+ x/2.f*(1.f+ x/3.f*(1.f+x/4.f*(1.f+x/5 .f))))): (1.f + x*(1.f+ x/2.f*(1.f+ x/3.f*(1.f+x/4.f*(1.f+x/5 .f))))):
1.f / (1.f -x*(1.f -x/2.f*(1.f- x/3.f*(1.f-x /4.f*(1.f-x/5.f))))); 1.f / (1.f -x*(1.f -x/2.f*(1.f- x/3.f*(1.f-x /4.f*(1.f-x/5.f)))));
} }
//! Get a night mode version of a color. That is find the brightnes
s of a color and set that in the
//! red channel only
inline Vec3f getNightColor(const Vec3f& dayColor)
{
float max = 0.0;
for(int i=0; i<3; i++)
{
max = dayColor[i] > max ? dayColor[i] : max;
}
return Vec3f(max, 0, 0);
}
//! Calculate and getting orbital period in days from semi-major axi
s (in AU)
double calculateOrbitalPeriod(double SemiMajorAxis);
} }
#endif // _STELUTILS_HPP_ #endif // _STELUTILS_HPP_
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