cadencii.fft.makect C# (CSharp) Method

        static void makect( int nc, int* ip, double* c ) {
            int j, nch;
            double delta;

            ip[1] = nc;
            if ( nc > 1 ) {
                nch = nc >> 1;
                delta = atan( 1.0 ) / nch;
                c[0] = cos( delta * nch );
                c[nch] = 0.5 * c[0];
                for ( j = 1; j < nch; j++ ) {
                    c[j] = 0.5 * cos( delta * j );
                    c[nc - j] = 0.5 * sin( delta * j );
                }
            }
        }