以編程方式在Silverlight中使用C＃繪圖

Question

我正在嘗試使用C＃在Silverlight中創建Aitoff-Hammer網格。它應該看起來像this減去點和數字。

我不是程序員，但已經能夠使用ActionScript文件將this拼在一起做同樣的事情，這是我的前任編寫的。正如你所看到的，我得到了網格和不需要的對角線。我不確定如何避免在我的代碼中繪製對角線。

任何人可以提供幫助解決我的問題或指出我可能會做錯什麼將不勝感激。如果我遺漏了重要信息，請讓我知道。謝謝。

這裏是我的代碼：

PolyLineSegment segment = new PolyLineSegment(); 

PathFigure figure = new PathFigure(); 

figure.StartPoint = new Point(xCenter, yCenter); 

PathGeometry geometry = new PathGeometry(); 

Path path = new Path(); 

path.Stroke = new SolidColorBrush(Colors.Black); 

path.StrokeThickness = 2; 
aitoff coords = new aitoff(); 

for (int ra = 0; ra <= 24; ra = ra + 3) 
{ 
    for (int dec = -90; dec <= 90; dec = dec + 3) 
    { 
     points = coords.GetAitoffCoord(ra, dec); 
     double xCoord = xCenter + points.X * width/2; 
     double yCoord = yCenter + points.Y * height/2; 
     segment.Points.Add(new Point(xCoord, yCoord));     
    } 
}  

for (int dec = -90; dec <= 90; dec = dec + 30) 
{ 
    for (int ra = 0; ra <= 12; ra = ra + 1) 
    { 
     points = coords.GetAitoffCoord(ra, dec); 
     double xCoord = xCenter + points.X * width/2; 
     double yCoord = yCenter + points.Y * height/2;     
     segment.Points.Add(new Point(xCoord, yCoord)); 
    } 
} 

for (int dec = -90; dec <= 90; dec = dec + 30) 
{ 
    for (double ra = 12.01; ra <= 25; ra++) 
    { 
     points = coords.GetAitoffCoord(ra, dec); 
     double xCoord = xCenter + points.X * width/2; 
     double yCoord = yCenter + points.Y * height/2; 
     segment.Points.Add(new Point(xCoord, yCoord)); 
    } 
} 

for (int dec = -90; dec <= 90; dec = dec + 3) 
{ 
    double ra = 12.01; 

    points = coords.GetAitoffCoord(ra, dec); 
    double xCoord = xCenter + points.X * width/2; 
    double yCoord = yCenter + points.Y * height/2; 
    segment.Points.Add(new Point(xCoord, yCoord)); 
} 

figure.Segments.Add(segment); 
geometry.Figures.Add(figure); 
path.Data = geometry; 
LayoutRoot.Children.Add(path); 


// GetAitoff 

public class aitoff 
{ 
    double ra; 
    double dec; 

    Point coords = new Point(); 

    double ra2deg = Math.PI/180.0f; 

    public Point GetAitoffCoord(double raIn, double decIn) 
    { 
     ra = raIn * 360/24; 
     dec = decIn; 
     if (ra > 180) 
      ra = ra - 360; 

     double l = ra * ra2deg; 
     double b = dec * ra2deg; 

     double t = Math.Sqrt(2/(1 + Math.Cos(b) * Math.Cos(l/2))); 
     double x = 2 * t * Math.Cos(b) * Math.Sin(l/2); 
     double y = t * Math.Sin(b); 

     coords.X = x/(-2 * Math.Sqrt(2)); 
     coords.Y = y/(-1 * Math.Sqrt(2)); 

     return coords; 
    } 
} 

Answer 1

對角線多餘的線條，因爲你要添加點和線段的數字相同。筆從不會從紙上擡起。你必須將你的幾何分解成更多的數字。

將您的細分和圖形創建複製到每一個你想讓筆「下去」的地方，然後將figure.Segments.Add（細分）和geometry.Figures.Add（圖）放到你想要筆的每個地方「上」。

這樣，你的幾何圖形將由許多獨立的圖形組成，並且你的對角線不應該再成爲問題。

 for (int ra = 0; ra <= 24; ra = ra + 3) 
     { 
      figure = new PathFigure(); 
      segment = new PolyLineSegment(); 
      for (int dec = -90; dec <= 90; dec = dec + 3)  
      {   
       points = coords.GetAitoffCoord(ra, dec);   
       double xCoord = xCenter + points.X * width/2;   
       double yCoord = yCenter + points.Y * height/2;   
       segment.Points.Add(new Point(xCoord, yCoord));      
      } 
      figure.StartPoint = segment.Points[0]; 
      figure.Segments.Add(segment); 
      geometry.Figures.Add(figure); 
     } 

     for (int dec = -90; dec <= 90; dec = dec + 30) 
     { 
      figure = new PathFigure(); 
      segment = new PolyLineSegment(); 
      for (int ra = 0; ra <= 12; ra = ra + 1) 
      { 
       points = coords.GetAitoffCoord(ra, dec); 
       double xCoord = xCenter + points.X * width/2; 
       double yCoord = yCenter + points.Y * height/2; 
       segment.Points.Add(new Point(xCoord, yCoord)); 
      } 
      figure.StartPoint = segment.Points[0]; 
      figure.Segments.Add(segment); 
      geometry.Figures.Add(figure); 
     } 

     for (int dec = -90; dec <= 90; dec = dec + 30) 
     { 
      figure = new PathFigure(); 
      segment = new PolyLineSegment(); 
      for (double ra = 12.01; ra <= 25; ra++) 
      { 
       points = coords.GetAitoffCoord(ra, dec); 
       double xCoord = xCenter + points.X * width/2; 
       double yCoord = yCenter + points.Y * height/2; 
       segment.Points.Add(new Point(xCoord, yCoord)); 
      } 
      figure.StartPoint = segment.Points[0]; 
      figure.Segments.Add(segment); 
      geometry.Figures.Add(figure); 
     } 

     figure = new PathFigure(); 
     segment = new PolyLineSegment(); 
     for (int dec = -90; dec <= 90; dec = dec + 3) 
     { 
      double ra = 12.01; 
      points = coords.GetAitoffCoord(ra, dec); 
      double xCoord = xCenter + points.X * width/2; 
      double yCoord = yCenter + points.Y * height/2; 
      segment.Points.Add(new Point(xCoord, yCoord)); 
     } 
     figure.StartPoint = segment.Points[0]; 
     figure.Segments.Add(segment); 
     geometry.Figures.Add(figure);