[general]
name = Fresnel Wave2;
comments = Fresnel's wave-surface. Auguste Jean Fresnel (1788-1827).;
a1_min = 0;
a1_max = 360;
a1_steps = 80;
a2_min = -90; 
a2_max = 90;
a2_steps = 80;

[param]
name = a;
title = Amplitude;
default = 10;
min = 0;
max = 15;

[formula]
S1 = sin(A1);
C1 = cos(A1);
S2 = sin(A2);
C2 = cos(A2);

T1 = (pow(C1,4) + pow(S1,4)) * pow(C2,4) + pow(S2,4);
T2 = sqrt(0.965 / 3 - 0.935 / 3 * T1);
T3 = -2 * a * 0.1 * T2 * cos((acos(-(-0.941 / 6 + 0.374 * T1 - 1.309 / 6 * ((pow(C1,6) + pow(S1,6)) * pow(C2,6) + pow(S2,6)) - 1.221 * sqr(C1) * pow(C2,4) * sqr(S1) * sqr(S2)) / pow(T2,3)) - 180) / 3) + 0.8;

X = 0.5 * C1 * C2 / T3;
Y = 0.5 * S2 / T3;
Z = -0.5 * S1 * C2 / T3;


[preset]
name = default;
a = 10;
a1_min = 0;
a1_max = 360;
a1_steps = 80;
a2_min = -90; 
a2_max = 90;
a2_steps = 80;