[general]
name = Fermat Spiral;
comments = Pierre de Fermat (1601-1665).;
a1_min = -3;
a1_max = 3;
a1_steps = 200;
a2_min = 0; 
a2_max = 1;
a2_steps = 10;


[param]
name = a;
title = Radius;
default = 1;
min = 0.1;
max = 2;


[formula]
I1 = linstep(-0.000001,0,A1);
I2 = 1 - I1;
u = A1 * pi;
C1 = sqrt(u) * cos(deg(abs(u))) * a;
S1 = sqrt(u) * sin(deg(abs(u))) * a;

X = (I1 - I2) * C1;
Y = A2;
Z = (I1 - I2) * S1;


[preset]
name = default;
a = 1;
a1_min = -3;
a1_max = 3;
a1_steps = 200;
a2_min = 0; 
a2_max = 1;
a2_steps = 10;