[general]
name = Helicoid Spherical;
comments = ;
a1_min = 0;
a1_max = 4;
a1_steps = 80;
a2_min = 0; 
a2_max = 0.5;
a2_steps = 40;


[param]
name = a;
title = Shape;
default = 0;
min = -1;
max = 2;

[param]
name = b;
title = Spacing;
default = 0.5;
min = 0.1;
max = 2;

[param]
name = c;
title = Center Offset;
default = 0;
min = 0;
max = 5;


[formula]
u = deg(A1 * pi);
v = A2 * pi;
T1 = 1 + a * sin(deg(v)); 

X = c * T1 * sin(u) - T1 * A2 * cos(u);
Y = cos(deg(v + pi)) + b * A1;
Z = c * T1 * cos(u) + T1 * A2 * sin(u)


[preset]
name = default;
a = 0;
b = 0.5;
c = 0;
a1_min = 0;
a1_max = 4;
a1_steps = 80;
a2_min = 0;
a2_max = 0.5;
a2_steps = 40;