[general]
name = SeaShell;
comments = Sea-Shell surface;
a1_min = 0;
a1_max = 2;
a1_steps = 40;
a2_min = 0; 
a2_max = 2;
a2_steps = 100;


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

[param]
name = c;
title = Outer Radius;
default = 1;
min = 0.01;
max = 10;

[param]
name = a;
title = Inner Radius;
default = 1;
min = 0.1;
max = 10;

[param]
name = d;
title = Windings;
default = 3;
min = 0.1;
max = 10;


[formula]
T1 = deg(A1 * pi);
T2 = deg(d * A2 * pi);
T3 = a * (1 - A2 / 2);
C1 = 1 + cos(T1);
C2 = cos(T2);
S2 = sin(T2);

X = T3 * C2 * C1 + 0.5 * c * C2;
Y = b * A2 * 3 + T3 * sin(T1);
Z = T3 * S2 * C1 + 0.5 * c * S2;

[preset]
name = default;
b = 1;
c = 1;
a = 1;
d = 3;
a1_min = 0;
a1_max = 2;
a1_steps = 40;
a2_min = 0; 
a2_max = 2;
a2_steps = 100;