C++ (Cpp) CSG_Vector::Get_Length示例

示例#1

文件： mat_matrix.cpp 项目： johanvdw/saga-debian

//---------------------------------------------------------
double CSG_Vector::Get_Angle(const CSG_Vector &Vector) const
{
	if( Get_N() > Vector.Get_N() )
	{
		return( Vector.Get_Angle(*this) );
	}

	int		i;
	double	A, B, z, *Z	= Get_Data();

	if( (A = Get_Length()) > 0.0 && (B = Vector.Get_Length()) > 0.0 )
	{
		for(i=0, z=0.0; i<Get_N(); i++)
		{
			z	+= Vector[i] * Z[i];
		}

		for(i=Get_N(); i<Vector.Get_N(); i++)
		{
			z	+= Vector[i];
		}

		return( acos(z / (A * B)) );
	}

	return( 0.0 );
}

示例#2

//---------------------------------------------------------
std::pair<double,double> minmax(CSG_Vector v)
{
	double min = v[0];
	double max = v[0];

	for (int i = 0; i < v.Get_Length(); i++) {
		if (v[i] > v[0]) {
			max = v[i];
		}
		else if (v[i] < v[0]) {
			min = v[i];
		}
	}

	return std::make_pair(min, max);
}