double uscslsFunc(double x) { if (x >= 1.6) return 0.065 * x + 0.704; if (x > -0.8) { var x2 = x * x; var x3 = x2 * x; return 0.125 * (x2 - x3) + 0.625 * x; } return 0.185 * x - 0.208; }