double Angle(coor a, coor b, coor c)
{
double ang;
double l1 = Math.Sqrt((b.x - c.x) * (b.x - c.x) + (b.y - c.y) * (b.y - c.y));
double l2 = Math.Sqrt((a.x - c.x) * (a.x - c.x) + (a.y - c.y) * (a.y - c.y));
double l3 = Math.Sqrt((b.x - a.x) * (b.x - a.x) + (b.y - a.y) * (b.y - a.y));
ang = Math.Acos((l1 * l1 + l2 * l2 - l3 * l3) / (2 * l1 * l2));
return(ang);
}
double Volume(int id1, int id2, int id3, double Height)
{
//coor zb = new coor();
coor a = zbArray[id1];
coor b = zbArray[id2];
coor c = zbArray[id3];
//double h1 = a.z;
//double h2 = b.z;
//double h3 = c.z;
//double minHeight = a.z;
//double maxHeight = a.z;
#region
//double maxHeight = (a.z > b.z ? a.z : b.z) > c.z ? (a.z > b.z ? a.z : b.z) : c.z;
//double minHeight = (a.z < b.z ? a.z : b.z) < c.z ? (a.z < b.z ? a.z : b.z) : c.z;
//double midHeight;
//if (maxHeight==a.z)
//{
//}
//if (a.z<b.z&&b.z<c.z||c.z<b.z&&b.z<a.z)
//{
// midHeight = b.z;
//}
//else if (b.z<a.z&&a.z<c.z||c.z<a.z&&a.z<b.z)
//{
// midHeight = a.z;
//}
//else
//{
// midHeight = c.z;
//}
//double S = ((a.x * b.y - b.x * a.y) + (b.x * c.y - c.x * b.y) + (c.x * a.y - a.x * c.y)) / 2;
//double V1 = (S * maxHeight) / 3;
#endregion
double ab = Distance(a, b);
double ac = Distance(a, c);
double bc = Distance(b, c);
double p = (ab + ac + bc) / 2;
double S = Math.Sqrt(p * (p - ab) * (p - ac) * (p - bc));
double V1 = (S * (a.z + b.z + c.z) / 3) - Height * S;
return(V1);
}
int ZuoYou(coor a, coor b, coor c)
{
int youbian;
double S;
S = (a.x - c.x) * (b.y - c.y) - (a.y - c.y) * (b.x - c.x);
if (S > 0)
{
youbian = 1;
}
else if (S < 0)
{
youbian = -1;
}
else
{
youbian = 0;
}
return(youbian);
}
private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog open = new OpenFileDialog();
open.Filter = "Txt数据(*.txt)|*.txt";
if (open.ShowDialog() != DialogResult.OK)
{
return;
}
StreamReader sr = new StreamReader(open.FileName, Encoding.Default);
coor zb = new coor();
while (true)
{
string strLine = sr.ReadLine();
if (strLine != null)
{
string[] H = strLine.Split(' ');
zb.x = Convert.ToDouble(H[1]);
zb.y = Convert.ToDouble(H[2]);
zb.z = Convert.ToDouble(H[3]);
zbArray.Add(zb);
}
else
{
break;
}
}
for (int i = 0; i < zbArray.Count; i++)
{
dataGridView1.Rows.Add();
dataGridView1.Rows[i].Cells[0].Value = zbArray[i].x;
dataGridView1.Rows[i].Cells[1].Value = zbArray[i].y;
dataGridView1.Rows[i].Cells[2].Value = zbArray[i].z;
}
}
double Distance(coor a, coor b)
{
return(Math.Sqrt((b.x - a.x) * (b.x - a.x) + (b.y - a.y) * (b.y - a.y)));
}