[general]
name = Umbilic Torus;
comments = ;
a1_min = -180;
a1_max = 180;
a1_steps = 60;
a2_min = -180; 
a2_max = 180;
a2_steps = 60;


[formula]
T1 = A1 / 3;
T2 = 7 + cos(T1 - 2 * A2) + 2 * cos(T1 + A2);
X = 0.1 * sin(A1) * T2;
Y = -0.1 * (sin(T1 - 2 * A2) + 2 * sin(T1 + A2));
Z = -0.1 * cos(A1) * T2;