[general]
name = Snail;
comments = Snail surface;
a1_min = 0;
a1_max = 3;
a1_steps = 40;
a2_min = -1; 
a2_max = 1;
a2_steps = 40;

[formula]
T1 = deg(A1);
T2 = deg(A2 * pi);
C2 = cos(T2);

X = -A1 * sin(T2);
Y = A1 * C2 * sin(T1);
Z = A1 * cos(T1) * C2;