/// <summary>
/// 生成初始矩形
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
private Tpoint[] Build_Matrix(Tpoint[] p)
{
double[] X = new double[p.Length];
double[] Y = new double[p.Length];
for (int i = 0; i < p.Length; i++)
{
X[i] = p[i].x;
Y[i] = p[i].y;
}
double Xmin, Xmax, Ymin, Ymax;
Xmin = X.Min();
Xmax = X.Max();
Ymax = Y.Max();
Ymin = Y.Min();
Tpoint[] Matrix = new Tpoint[4];
Matrix[0] = new Tpoint();
Matrix[0].Name = "P1";
Matrix[0].x = Xmin - 1;
Matrix[0].y = Ymin - 1;
Matrix[1] = new Tpoint();
Matrix[1].Name = "P2";
Matrix[1].x = Xmin - 1;
Matrix[1].y = Ymax + 1;
Matrix[2] = new Tpoint();
Matrix[2].Name = "P3";
Matrix[2].x = Xmax + 1;
Matrix[2].y = Ymax + 1;
Matrix[3] = new Tpoint();
Matrix[3].Name = "P4";
Matrix[3].x = Xmax + 1;
Matrix[3].y = Ymin - 1;
return(Matrix);
}
public Triangle(Tpoint p1, Tpoint p2, Tpoint p3, double hr)
{
this.p1 = p1;
this.p2 = p2;
this.p3 = p3;
this.hr = hr;
SetV();
}
/// <summary>
/// 打开文件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void toolStripButton2_Click(object sender, EventArgs e)
{
try
{
InputGrid();
tpoints = new Tpoint[data.RowCount];
for (int i = 0; i < data.RowCount; i++)
{
tpoints[i] = new Tpoint(i + 1, data[0, i].Value.ToString(), double.Parse(data[1, i].Value.ToString()),
double.Parse(data[2, i].Value.ToString()), double.Parse(data[3, i].Value.ToString()));
}
GetPic_Point(zoom, go[1]);
}
catch
{
MessageBox.Show("打开数据失败");
}
}
public Triangle(Tpoint p1, Tpoint p2, Tpoint p3)
{
this.p1 = p1;
this.p2 = p2;
this.p3 = p3;
}
public Side(Tpoint p1, Tpoint p2)
{
this.p1 = p1;
this.p2 = p2;
}
public Side(Tpoint p1, Tpoint p2, double hr)
{
this.p1 = p1;
this.p2 = p2;
this.hr = hr;
}
/// <summary>
/// 通过遍历离散点，生成平面三角网
/// </summary>
/// <param name="p"></param>
/// <param name="T1"></param>
/// <param name="S"></param>
/// <returns></returns>
private List <Tpoint> BuildTrinet(Tpoint[] p, List <Tpoint> T1)
{
List <Tpoint> T2 = new List <Tpoint>();
List <Side> S = new List <Side>();
for (int i = 0; i < p.Length; i++)
{
for (int j = 0; j < T1.Count - 2; j += 3)
{
Tpoint A = new Tpoint
{
x = T1[j].x,
y = T1[j].y
};
Tpoint B = new Tpoint
{
x = T1[j + 1].x,
y = T1[j + 1].y
};
Tpoint C = new Tpoint
{
x = T1[j + 2].x,
y = T1[j + 2].y
};
double x0, y0, r, lr;
x0 = ((B.y - A.y) * (C.y * C.y - A.y * A.y + C.x * C.x - A.x * A.x) - (C.y - A.y) * (B.y * B.y - A.y * A.y + B.x * B.x - A.x * A.x))
/ (2 * (C.x - A.x) * (B.y - A.y) - 2 * (B.x - A.x) * (C.y - A.y));
y0 = ((B.x - A.x) * (C.x * C.x - A.x * A.x + C.y * C.y - A.y * A.y) - (C.x - A.x) * (B.x * B.x - A.x * A.x + B.y * B.y - A.y * A.y))
/ (2 * (C.y - A.y) * (B.x - A.x) - 2 * (B.y - A.y) * (C.x - A.x));
r = Math.Sqrt((x0 - A.x) * (x0 - A.x) + (y0 - A.y) * (y0 - A.y));
lr = Math.Sqrt((p[i].x - x0) * (p[i].x - x0) + (p[i].y - y0) * (p[i].y - y0)); //P点到外接圆圆心的距离
if (lr < r) //P点在三角形ABC外接圆的内部
{
T2.Add(T1[j]);
T2.Add(T1[j + 1]);
T2.Add(T1[j + 2]);
T1.RemoveAt(j + 2);
T1.RemoveAt(j + 1);
T1.RemoveAt(j);
j -= 3;
}
}//遍历T1中全部三角形
//三角形用3点排列变为3边排列
for (int k = 0; k < T2.Count; k++)
{
Side si;
if (k % 3 != 2)
{
si = new Side(T2[k], T2[k + 1]);
}
else
{
si = new Side(T2[k], T2[k - 2]);
}
S.Add(si);
}
//删除S中的公共边
for (int k = 0; k < S.Count - 1; k++)
{
int sss = 0;
for (int m = k + 1; m < S.Count; m++)
{
if (S[m] == S[k])
{
sss = 1;
S.RemoveAt(m);
m--;
}
}
if (sss == 1)
{
S.RemoveAt(k);
k--;
}
}
T2.Clear();
for (int k = 0; k < S.Count; k++)
{
T1.Add(S[k].p1);
T1.Add(S[k].p2);
T1.Add(p[i]);
}
S.Clear();
}//遍历所有离散点
return(T1);
}
