public static double Area(MySpace a, MySpace b, MySpace c)
{
double s1;
double s2;
double s3;
double sin;
double cos;
s1 = Math.Sqrt(Math.Pow(a.x - b.x, 2) + Math.Sqrt(Math.Pow(a.y - b.y, 2) + Math.Sqrt(Math.Pow(a.z - b.z, 2))));
s2 = Math.Sqrt(Math.Pow(c.x - b.x, 2) + Math.Sqrt(Math.Pow(c.y - b.y, 2) + Math.Sqrt(Math.Pow(c.z - b.z, 2))));
s3 = Math.Sqrt(Math.Pow(a.x - c.x, 2) + Math.Sqrt(Math.Pow(a.y - c.y, 2) + Math.Sqrt(Math.Pow(a.z - c.z, 2))));
cos = (Math.Pow(s1, 2) + Math.Pow(s2, 2) - Math.Pow(s3, 2));
sin = Math.Sqrt(1 - Math.Pow(cos, 2));
return(1 / 2 * s1 * s2 * sin);
}
public static void MaxMin(out MySpace a, out MySpace b, MySpace[] c, int d)
{
a = c[0];
b = c[0];
for (int i = 0; i < d; i++)
{
if (Distance(a) <= Distance(c[i]))
{
a = c[i];
}
if (Distance(b) >= Distance(c[i]))
{
b = c[i];
}
}
}
public static void MaxTriangle(MySpace a, MySpace[] b, int c)
{
double area = Area(b[0], b[1], b[3]);
for (int i = 0; i < c; i++)
{
for (int m = i + 1; m < c; m++)
{
for (int k = m + 1; k < c; k++)
{
if (area < Area(b[i], b[m], b[k]))
{
area = Area(b[i], b[m], b[k]);
}
}
}
}
Console.WriteLine(area);
}
public static double Distance(MySpace a, MySpace b)
{
return(Math.Sqrt(Math.Pow(a.x - b.x, 2) + Math.Pow(a.y - b.y, 2) + Math.Pow(a.z - b.z, 2)));
}
public static void Print(MySpace a)
{
Console.WriteLine("X=" + a.x + "Y=" + a.y + "Z=" + a.z);
}