//空间两点的距离
public Double dexz(Pointz a, Pointz b)
{
double x = System.Math.Abs(b.x - a.x);
double y = System.Math.Abs(b.y - a.y);
double z = System.Math.Abs(b.z - a.z);
return(Math.Sqrt(x * x + y * y + z * z));
}
private void 计算空间面积ToolStripMenuItem_Click(object sender, EventArgs e)
{
Pointz[] pointz = new Pointz[points.Length];
for (int i = 0; i < points.Length; i++)
{
pointz[i].x = points[i].X;
pointz[i].y = points[i].Y;
pointz[i].z = points[i].Z;
}
MessageBox.Show("" + area1.kongmianji(pointz));
}
//空间三角形的面积
public Double mianjiz(Pointz a, Pointz b, Pointz c)
{
double ab = dexz(a, b);
double bc = dexz(b, c);
double ac = dexz(a, c);
if (ab + bc > ac & ab + ac > bc & ac + bc > ab)
{
double s = (ab + ac + bc) / 2;
return(Math.Sqrt(s * (s - ab) * (s - ac) * (s - bc)));
}
else
{
return(0);
}
}
