[general]
name = Bonan-Jeener-Klein;
comments = Bonan-Jeener-Klein surface;
a1_min = 0;
a1_max = 360;
a1_steps = 100;
a2_min = 0; 
a2_max = 360;
a2_steps = 100;

[param]
name = s;
title = Frequency;
default = 3;
min = 1;
max = 8;

[param]
name = t;
title = Curvature;
default = 1.5;
min = 1;
max = 10;


[formula]
W1 = sin((s-1) * A1) + t;
T1 = ((s-1) / s) * W1;
T2 = (s+1) * A1 / 2;
C2 = cos(A2);

X = s * cos(A1) - cos(s * A1) - T1 * sin(T2) * C2;
Y = W1 * sin(A2);
Z = s * sin(A1) - sin(s * A1) + T1 * cos(T2) * C2;


[preset]
name = default;
s = 3;
t = 1.5;
a1_min = 0;
a1_max = 360;
a1_steps = 100;
a2_min = 0; 
a2_max = 360;
a2_steps = 100;