private static double workoutY1(double x, double y, int i, int allnum) {
if (x != Ox) {
double tana = (y - Oy) / (x - Ox) * R / r;
alpha = Math.atan(tana);
if (x <= Ox) alpha = alpha + Math.PI;
} else alpha = Math.PI / 2;
return (r * Math.sin(alpha - 2 * Math.PI * i / (allnum)) + Oy);
}
private static double workoutX(double x, double y, int i, int allnum) {
if (x != Ox) {
double tana = (y - Oy) / (x - Ox) * R / r;
alpha = Math.atan(tana);
if (x <= Ox) alpha = alpha + Math.PI;
} else alpha = Math.PI / 2;
return (R * Math.cos(alpha - 2 * Math.PI * i / (allnum) + theta - beta) + Ox);
}