//重载加法"+"操作符，可以把两个线连接在一起成为一个新的线要素
//重载操作符"+",把二个在首或尾有关联的线连接成一个新的线段
public static CLine operator +(CLine ln1, CLine ln2)
{
CLine tempLine = null; //新的线段
int m = ln1.POINTS.GetLength(0); //第一条线的点数
int n = ln2.POINTS.GetLength(0); //第二条线的点数
CPoint firstStart = ln1.POINTS[0]; //第一条线的起点
CPoint firstEnd = ln1.POINTS[m - 1]; //第一条线的终点
CPoint secondStart = ln2.POINTS[0]; //第二条线的起点
CPoint secondEnd = ln2.POINTS[m - 1]; //第二条线的终点
double ss = CPoint.GetDistanceBetweenTwoPoints(firstStart, secondStart); //第一条线起点与第二条线起点之间的距离
double se = CPoint.GetDistanceBetweenTwoPoints(firstStart, secondEnd); //第一条线起点与第二条线终点之间的距离
double es = CPoint.GetDistanceBetweenTwoPoints(firstEnd, secondStart); //第一条线终点与第二条线起点之间的距离
double ee = CPoint.GetDistanceBetweenTwoPoints(firstEnd, secondEnd); //第一条线终点与第二条线终点之间的距离
if (ss < Tolerance) //在容限范围内
{
CPoint[] pts = new CPoint[m + n - 1];
for (int i = m - 1; i >= 0; i--)
{
pts[m - i - 1] = ln1.POINTS[i]; //逆序拷贝第一个线要素的点
}
Array.Copy(ln2.POINTS, 0, pts, m, n); //顺序拷贝第二个线要素的点
tempLine = new CLine(pts);
}
else if (se < Tolerance)
{
CPoint[] pts = new CPoint[m + n - 1];
for (int i = m - 1; i >= 0; i--)
{
pts[m - i - 1] = ln1.POINTS[i]; //逆序拷贝第一个线要素的点
}
for (int j = n - 1; j >= 0; j--)
{
pts[m + n - j - 1] = ln2.POINTS[j]; //逆序拷贝第二个线要素的点
}
tempLine = new CLine(pts);
}
else if (es < Tolerance)
{
CPoint[] pts = new CPoint[m + n - 1];
Array.Copy(ln1.POINTS, 0, pts, 0, m); //顺序拷贝第一个线要素的点
Array.Copy(ln2.POINTS, 0, pts, m, n); //顺序拷贝第二个线要素的点
tempLine = new CLine(pts);
}
else if (ee < Tolerance)
{
CPoint[] pts = new CPoint[m + n - 1];
Array.Copy(ln1.POINTS, pts, m); //顺序拷贝第一个线要素的点
for (int i = n - 1; i >= 0; i--)
{
pts[m + n - i - 1] = ln2.POINTS[i]; //逆序拷贝第二个线要素的点
}
tempLine = new CLine(pts);
}
return(tempLine);
}
//重载Moveto方法，考虑只移动指定顶点到目标位置
public void Moveto(CPoint destinationPos, int ptIndex)
{
double distanceX = destinationPos.PX - _Points[ptIndex].PX;
double distanceY = destinationPos.PY - _Points[ptIndex].PY;
foreach (CPoint pt in _Points)
{
pt.PX += distanceX;
pt.PY += distanceY;
}
}
//判断两个点是否相等
public bool IsIdentical(CPoint buddyPoint)
{
double dis = GetDistanceBetweenTwoPoints(this, buddyPoint);
if (dis < Tolerance)
{
return(true);
}
else
{
return(false);
}
}
//函数GetLineLength计算线的长度
public double GetLineLength()
{
if (_Points.Length < 2)
{
return(0);
}
double totalDistance = 0;
int n = _Points.GetLength(0); //取得点的数目
for (int i = 1; i < n; i++)
{
CPoint p1 = _Points[i - 1];
CPoint p2 = _Points[i];
totalDistance += CPoint.GetDistanceBetweenTwoPoints(p1, p2); //注意计算两点之间的距离，累加
}
return(totalDistance);
}
//移动点到指定位置
public void Moveto(CPoint destinationPos)
{
x = destinationPos.x;
y = destinationPos.y;
}
//静态方法GetDistanceBetweenTwoPoints计算两点之间的距离
public static double GetDistanceBetweenTwoPoints(CPoint Pt1, CPoint Pt2)
{
double dis = System.Math.Sqrt((Pt1.PX - Pt2.PX) * (Pt1.PX - Pt2.PX) + (Pt1.PY - Pt2.PY) * (Pt1.PY - Pt2.PY));
return(dis);
}
static void Main(string[] args)
{
bool bExit = false; //退出标识
int ptCounts = 0; //点计数器
int lnCounts = 0; //线计数器
ArrayList points = new ArrayList(); //点对象数组
List <CLine> lines = new List <CLine>(); //线对象数组
//输入一组点，组成线，输入格式为：x y，当输入字符为“;”时，表示结束一条线的输入，当输入字符为“#”时表示结束所有输入
Console.WriteLine("Please input points' coordination one by one,the format is x y");
do
{
string instr = Console.ReadLine(); //读入坐标值
if (instr.IndexOf(";") >= 0 && points.Count > 1) //发现“;”,用已输入的坐标值产生新的线
{
int m = points.Count; //已有点数
CLine ln = new CLine(); //产生新的线对象
ln.POINTS = new CPoint[m]; //为线对象的点数组分配空间
for (int n = 0; n < m; n++)
{
ln.POINTS[n] = (CPoint)points[n]; //为每个点赋值
}
ln.SetValidation(); //设置有效性
ln.ID = lnCounts++;
lines.Add(ln); //把线对象加入列表
points.Clear(); //清空点数组对象
}
else if (instr.IndexOf("#") >= 0) //结束输入
{
bExit = true;
}
else
{
string[] ts = instr.Split(' '); //分解输入字符串
double x = double.Parse(ts[0]); //取得x
double y = double.Parse(ts[1]); //取得y
CPoint p = new CPoint(x, y); //产生新的点对象
p.ID = ptCounts++;
points.Add(p); //将点加入点数组中
}
} while (!bExit);
bExit = false;
Console.WriteLine("------Options------");
Console.WriteLine(@"1 表示打印信息
2 表示比较两条线要素
3 表示两条线相加
4 表示移动线
5 表示插入点
6 表示删除点");
Console.WriteLine("-------------------");
do
{
Console.Write("Please choose one business: ");
string key = Console.ReadLine();
switch (key)
{
case "1":
for (int i = 0; i < lines.Count; i++)
{
Console.WriteLine("line {0} contains {1} points and {2} meters long",
i + 1, lines[i].POINTS.Length, lines[i].GetLineLength());
for (int j = 0; j < lines[i].POINTS.Length; j++)
{
Console.WriteLine("({0},{1})", lines[i].POINTS[j].PX, lines[i].POINTS[j].PY);
}
}
break;
case "2":
if (lines[0].isValid && lines[1].isValid)
{
if (lines[0] > lines[1])
{
Console.WriteLine("The first line is longer than the second one");
}
else
{
Console.WriteLine("The first line is not longer than the second one");
}
}
break;
case "3":
Console.Write("Please choose the first line's number: ");
int numLn1 = int.Parse(Console.ReadLine());
Console.Write("Please choose the first line's number: ");
int numLn2 = int.Parse(Console.ReadLine());
if ((lines[numLn1 - 1] + lines[numLn2 - 1]) != null)
{
lines.Add(lines[numLn1 - 1] + lines[numLn2 - 1]);
}
else
{
Console.WriteLine("ERROR!");
}
break;
case "4":
Console.Write("Please choose the line's number: ");
int numLn = int.Parse(Console.ReadLine()) - 1;
Console.Write(@"1 Select Center Point to Move to
2 Select one Point to Move to
Please select the choice:");
string myChoice = Console.ReadLine();
switch (myChoice)
{
case "1":
Console.Write("Input your destination points: ");
string destinationPt1 = Console.ReadLine();
string[] dp1 = destinationPt1.Split(' '); //分解输入字符串
double x1 = double.Parse(dp1[0]); //取得x
double y1 = double.Parse(dp1[1]); //取得y
CPoint p1 = new CPoint(x1, y1); //产生新的点对象
lines[numLn].Moveto(p1);
break;
case "2":
Console.Write("Input the point's index you choose: ");
int selectedIndex = int.Parse(Console.ReadLine());
Console.Write("Input your destination points: ");
string destinationPt2 = Console.ReadLine();
string[] dp2 = destinationPt2.Split(' '); //分解输入字符串
double x2 = double.Parse(dp2[0]); //取得x
double y2 = double.Parse(dp2[1]); //取得y
CPoint p2 = new CPoint(x2, y2); //产生新的点对象
lines[numLn].Moveto(p2, selectedIndex - 1);
break;
default:
Console.WriteLine("ERROR!");
break;
}
break;
case "5":
Console.Write("Please choose the line's number: ");
int addLn = int.Parse(Console.ReadLine()) - 1;
Console.Write("Which location do you want to insert: ");
int addLoc = int.Parse(Console.ReadLine()) - 1;
Console.Write("Input your destination points");
string Pt = Console.ReadLine();
string[] add = Pt.Split(' '); //分解输入字符串
double addx = double.Parse(add[0]); //取得x
double addy = double.Parse(add[1]); //取得y
CPoint addPt = new CPoint(addx, addy); //产生新的点对象
lines[addLn].AddPoint(addLoc, addPt);
break;
case "6":
//在此处填写代码
break;
default:
bExit = true;
break;;
}
Console.WriteLine("-----------------------------");
} while (!bExit);
}