[general]
name = Dini;
comments = Dini surface. Ulisse Dini (1845-1918).;
a1_min = 0;
a1_max = 1440;
a1_steps = 100;
a2_min = 1; 
a2_max = 115;
a2_steps = 40;

[param]
name = b;
title = Spacing;
default = 1;
min = 0.1;
max = 10;


[formula]
S2 = sin(A2);

X = cos(A1) * S2;
Y = cos(A2) + log(tan(A2/2)) + b * 0.1 * rad(A1);
Z = sin(A1) * S2;


[preset]
name = default;
b = 1;
a1_min = 0;
a1_max = 1440;
a1_steps = 100;
a2_min = 1; 
a2_max = 115;
a2_steps = 40;