C# 如何在完整多边形的两点之间添加点
我有一份要点清单。我取第一个点和下一个点(第二个点),在第一个点和第二个点之间画一条线 我想在现有点之间添加另一个顶点 这是我的方法C# 如何在完整多边形的两点之间添加点,c#,line,polygon,point,point-in-polygon,C#,Line,Polygon,Point,Point In Polygon,我有一份要点清单。我取第一个点和下一个点(第二个点),在第一个点和第二个点之间画一条线 我想在现有点之间添加另一个顶点 这是我的方法 当用户双击该行时,应在该行添加一个点。 找到多边形生成的所有形状点。 检查e.位置是否在点列表中 如果存在,则检查该点的下限和上限。 在下边界旁边插入e.位置 用更新的列表重新绘制线条 我正在计算直线的所有点。通过使用y=mx+c 我的问题是我能得到所有垂直点x=a,一些对角线点和水平点,但不是全部。我需要知道原因是什么以及如何修复它? 我正在创建一个由ICIma
我正在计算直线的所有点。通过使用y=mx+c 我的问题是我能得到所有垂直点x=a,一些对角线点和水平点,但不是全部。我需要知道原因是什么以及如何修复它?
我正在创建一个由ICImaging视频抓取程序库提供的位图覆盖。所以我只能通过整数点在屏幕上绘制
private void btnAddPoint_Click(object sender, EventArgs e)
{
//IsLineSelected = true;
Debug.Print("Current Points in List ");
foreach (System.Drawing.Point P in PathPoints)
{
Debug.Print(P.ToString());
}
for (int IndexI = 0; IndexI != PathPoints.Count - 1; IndexI++)
{
if (IndexI == PathPoints.Count-1)
{
break;
}
else
{
Debug.Print("P1:" + PathPoints[IndexI].ToString() + "P2:"+ PathPoints[IndexI+1].ToString());
ShapeDirectory.AllLinePoints(PathPoints[IndexI], PathPoints[IndexI + 1]);
}
}
foreach (System.Drawing.Point P in ShapeDirectory.LinePoints)
{
PathPoints3.Add(P);
}
drawLinePoints = true;
}
public static void AllLinePoints(Point p1, Point p2)
{
double YDiff = p2.Y - p1.Y;
double XDiff = p2.X - p1.X;
double SlopM = Math.Round(Math.Abs(YDiff / XDiff));
double YinterceptB = Math.Round(Math.Abs(p1.Y - (SlopM * p1.X)));
Debug.Print("Slop: " + SlopM.ToString() + "Y Intercept: " + YinterceptB.ToString());
if (SlopM == 0)
{
}
if (Double.IsNegativeInfinity(SlopM) || Double.IsPositiveInfinity(SlopM))
{
int LowerBoundX = 0;
int LowerBoundY = 0;
int upperBoundX;
int upperBoundY;
double distanceBetwwenP1andp2 = GetDistanceBetween2points(p1, p2);
if (p1.X == p2.X )
{
LowerBoundX = p1.X;
upperBoundX = p2.X;
}
if (p1.Y <= p2.Y)
{
LowerBoundY = p1.Y;
upperBoundY = p2.Y;
}
else
{
LowerBoundY = p2.Y;
upperBoundY = p1.Y;
}
//Vertical
for (int YIndex = LowerBoundY; YIndex <= upperBoundY; YIndex++)
{
TempLinePoint.X = LowerBoundX;
TempLinePoint.Y = YIndex;
//Debug.Print("Current Line Points X: " + XIndex.ToString() + "Y: " + YIndex.ToString());
LinePoints.Add(TempLinePoint);
}
}
else
{
int LowerBoundX;
int LowerBoundY;
int upperBoundX;
int upperBoundY;
double distanceBetwwenP1andp2 = GetDistanceBetween2points(p1, p2);
if (p1.X <= p2.X && p1.Y <= p2.Y)
{
LowerBoundX = p1.X;
upperBoundX = p2.X;
LowerBoundY = p1.Y;
upperBoundY = p2.Y;
}
else
{
LowerBoundX = p2.X;
upperBoundX = p1.X;
LowerBoundY = p2.Y;
upperBoundY = p1.Y;
}
//if Vertical
for (int YIndex = LowerBoundY; YIndex <= upperBoundY; YIndex++)
{
for (int XIndex = LowerBoundX; XIndex <= upperBoundX; XIndex++)
{
if (YIndex == (SlopM * XIndex) + YinterceptB)
{
TempLinePoint.X = XIndex;
TempLinePoint.Y = YIndex;
//Debug.Print("Current Line Points X: " + XIndex.ToString() + "Y: " + YIndex.ToString());
LinePoints.Add(TempLinePoint);
}
}
}
}
private void btnAddPoint_单击(对象发送者,事件参数e)
{
//IsLineSelected=true;
调试.打印(“列表中的当前点”);
foreach(路径点中的System.Drawing.Point P)
{
Debug.Print(P.ToString());
}
for(int IndexI=0;IndexI!=PathPoints.Count-1;IndexI++)
{
if(IndexI==PathPoints.Count-1)
{
打破
}
其他的
{
Debug.Print(“P1:+PathPoints[IndexI].ToString()+”P2:+PathPoints[IndexI+1].ToString());
所有线点(路径点[IndexI],路径点[IndexI+1]);
}
}
foreach(System.Drawing.Point P在ShapeDirectory.LinePoints中)
{
路径点3.Add(P);
}
drawLinePoints=真;
}
公共静态无效所有线点(点p1、点p2)
{
双YDiff=p2.Y-p1.Y;
双XDiff=p2.X-p1.X;
double slop=Math.Round(Math.Abs(YDiff/XDiff));
double-YinterceptB=Math.Round(Math.Abs(p1.Y-(SlopM*p1.X));
Debug.Print(“Slop:+Slop.ToString()+”Y截距:“+YinterceptB.ToString());
如果(斜率=0)
{
}
if(Double.IsNegativeInfinity(SlopM)| | Double.IsPositiveInfinity(SlopM))
{
int LowerBoundX=0;
int LowerBoundY=0;
int上限x;
int上界;
double DistanceBetween p1和p2=获取两点之间的距离(p1,p2);
如果(p1.X==p2.X)
{
LowerBoundX=p1.X;
上限X=p2.X;
}
如果(p1.Ypublic static double GetAngleBetweenPoints)(点p1,点p2)
{
双xDiff=p2.X-p1.X;
双yDiff=p1.Y-p2.Y;
双角度=数学Atan2(yDiff,xDiff)*(180/数学PI);
如果(角度<0.0)
角度=角度+360.0;
返回角;
}
公共静态GenericList点AddingByAngle(GenericList LinePoints2)
{
列表角度从中心点到形状点=新建列表();
List Linepoints3=新列表(LinePoints2);
List LinePoints=Linepoints3.Distinct().ToList();
点中心点=新点();
CenterPoint.X=PolygonCenterX;
CenterPoint.Y=多克隆中心;
对于(int index=0;index2)
{
添加(路径点[0]);
IsPathComplete=true;
IsPointSelected=false;
起始点=路径点[0];
EndingPoint=PathPoints[PathPoints.Count-1];
}
if(IsPathComplete&&NewPointAdd)
{
System.Drawing.Point Centerpoint=新的System.Drawing.Point();
路径点。添加(例如位置);
MinMaxFinder(路径点);
Centerpoint.X=PolygonCenterX;
Centerpoint.Y=多克隆中心;
lblAngle.Text=Convert.ToString(Math.Round(ShapeDirectory.GetAngleBetweenPoints(Centerpoint,e.Location));
路径点3.Clear();
PathPoints3=ShapeDirectory.PointAddingByAngle(路径点);
PathPoints.Clear();
foreach(路径点S3中的System.Drawing.Point p)
{
路径点。添加(p);
}
PathPoints.Add(PathPoints3[0]);
NewPointAddDraw=true;
}
}
public static double GetAngleBetweenPoints(Point p1, Point p2)
{
double xDiff = p2.X - p1.X;
double yDiff = p1.Y - p2.Y;
double Angle = Math.Atan2(yDiff, xDiff) * (180 / Math.PI);
if (Angle < 0.0)
Angle = Angle + 360.0;
return Angle;
}
public static GenericList<Point> PointAddingByAngle(GenericList<Point> LinePoints2)
{
List<int> AnglefromCenterPointsofShapePoint = new List<int>();
List<Point> Linepoints3 = new List<Point>(LinePoints2);
List<Point> LinePoints = Linepoints3.Distinct().ToList();
Point CenterPoint = new Point();
CenterPoint.X = PolygonCenterX;
CenterPoint.Y = PolygonCenterY;
for (int index = 0; index < LinePoints.Count; index++)
{
AnglefromCenterPointsofShapePoint.Add((int) Math.Round(GetAngleBetweenPoints(CenterPoint, LinePoints[index])));
}
AnglefromCenterPointsofShapePoint.Sort();
int currentPointAngle = 0;
for (int AngleListIndex = 0; AngleListIndex < AnglefromCenterPointsofShapePoint.Count; AngleListIndex++)
{
currentPointAngle = AnglefromCenterPointsofShapePoint[AngleListIndex];
for (int index = 0; index < LinePoints.Count; index++)
{
if ((Math.Round(GetAngleBetweenPoints(CenterPoint, LinePoints[index]))) == currentPointAngle)
{
SortedPoints.Add(LinePoints[index]);
break;
}
}
}
SortedPoints.Add(SortedPoints[0]);
return SortedPoints;
}
private void pictureBox_MouseDoubleClick(object sender, MouseEventArgs e)
{
if (PathPoints.Count > 2)
{
PathPoints.Add(PathPoints[0]);
IsPathComplete = true;
IsPointSelected = false;
StartingPoint = PathPoints[0];
EndingPoint = PathPoints[PathPoints.Count - 1];
}
if (IsPathComplete && NewPointAdd)
{
System.Drawing.Point Centerpoint = new System.Drawing.Point();
PathPoints.Add(e.Location);
MinMaxFinder(PathPoints);
Centerpoint.X = PolygonCenterX;
Centerpoint.Y = PolygonCenterY;
lblAngle.Text = Convert.ToString(Math.Round(ShapeDirectory.GetAngleBetweenPoints(Centerpoint, e.Location)));
PathPoints3.Clear();
PathPoints3 = ShapeDirectory.PointAddingByAngle(PathPoints);
PathPoints.Clear();
foreach (System.Drawing.Point p in PathPoints3)
{
PathPoints.Add(p);
}
PathPoints.Add(PathPoints3[0]);
NewPointAddDraw = true;
}
}