Need C# snippet

BAZAg · 30.12.2021

myndeswx сказал(а):
Looking for a smart C # programmer, need to work with some math logic.
Here's what need to be done -

We have a list of coordinates

1. 54.91793; 23.92322
2. 54.91794; 23.92291
3. 54.91796; 23.92244
It would look something like this if we draw a route on the map -
Посмотреть вложение 87250

Sometimes coordinates are close to each other, but sometimes they are far away, for example we take line 1 and line 2
54.917 93 54.917 94 is only incremented by 0.00001 - that is good (distance is close) BUT, 23.92 322 and 23.92 291 has decreased by 31 (difference can be positive or negative because of how coordinates work) and that is too much, we would look for a limit of 0.00020.
The script should generate the missing coordinates in

1.54.91793; 23.92322
2.54.91793; 23.92300 - auto generated
3.54.91794; 23.92291
4.54.91795; 23.92275 - auto generated
5.54.91796; 23.92244

Hope it's understandable, if you think you can do this please write here or telegram - @mindeswx : az:

C#:

System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo("en-EN");

List<string> list = new List<string>();
list.Add("54.91793; 23.92322");
list.Add("54.91794; 23.92291");
list.Add("54.91796; 23.92244");

PointF limit = new PointF(
    float.Parse("0.0002",System.Globalization.NumberStyles.Float, ci),
    float.Parse("0.0002",System.Globalization.NumberStyles.Float, ci));

List<PointF> points = new List<PointF>();
foreach(string line in list) {
    float x = float.Parse(line.Split(';')[0].Trim(),System.Globalization.NumberStyles.Float, ci);
    float y = float.Parse(line.Split(';')[1].Trim(),System.Globalization.NumberStyles.Float, ci);
    PointF p = new PointF((float)Math.Round(x,5),(float)Math.Round(y,5));
    points.Add(p);
}

List<PointF> pointresult = new List<PointF>();

for(int i=0; i<points.Count; i++) {
    PointF a = points[i]; // start
    pointresult.Add(a);
    if( i + 1 >= points.Count) break;
   
    PointF b = points[i+1]; // end
   
    int count_x = (int)Math.Truncate(Math.Abs(b.X - a.X) / limit.X);
    project.SendInfoToLog("count x: " +count_x.ToString());
    int count_y = (int)Math.Truncate(Math.Abs(b.Y - a.Y) / limit.Y);
    project.SendInfoToLog("count y: " +count_y.ToString());
       
    if(count_x == 0 && count_y == 0 ) break;
       
    float axx = a.Y - b.Y;
    float byy = b.X - a.X;
    float c = a.X*b.Y-b.X*a.Y;

    if(count_x == 0 && count_y > 0) {
        float[] new_points_y = Enumerable.Range(1, count_y).Select(m => (float)Math.Round((a.Y + (m * limit.Y)),5)).ToArray();
        for(int yy = 0;yy < new_points_y.Length;yy++) {          
            float newx = (float)Math.Round((-byy*new_points_y[yy]-c)/axx,5);
            if(!(newx >= a.X && newx<=b.X)) newx = (float)Math.Round(((a.X-b.X)/new_points_y.Length) * yy+a.X, 5);
            pointresult.Add(new PointF(  newx , new_points_y[yy]));
        }
    }
    else if(count_x > 0 && count_y == 0) {
        float[] new_points_x = Enumerable.Range(1, count_x).Select(m => (float)Math.Round((a.X + (m * limit.X)),5)).ToArray();
        for(int xx = 0;xx < new_points_x.Length;xx++) {      
            float newy = (float)Math.Round((-axx*new_points_x[xx]-c)/byy,5);
            if(!(newy >= a.Y && newy<=b.Y))  newy = (float)Math.Round(((a.Y-b.Y)/new_points_x.Length) * xx+a.Y, 5);              
            pointresult.Add(new PointF(new_points_x[xx], newy));
        }  
    }
    else if(count_x > count_y){
        float[] new_points_x = Enumerable.Range(1, count_x).Select(m => (float)Math.Round((a.X + (m * limit.X)),5)).ToArray();
        for(int xx = 0;xx < new_points_x.Length;xx++) {          
            float newy = (float)Math.Round((-axx*new_points_x[xx]-c)/byy,5);
            if(!(newy >= a.Y && newy<=b.Y))  newy = (float)Math.Round(((a.Y-b.Y)/new_points_x.Length) * xx+a.Y, 5);              
            pointresult.Add(new PointF(new_points_x[xx], newy));
        }
    }
    else {  
        float[] new_points_y = Enumerable.Range(1, count_y).Select(m => (float)Math.Round((a.Y + (m * limit.Y)),5)).ToArray();
        for(int yy = 0; yy < new_points_y.Length; yy++) {  
            float newx = (float)Math.Round((-byy*new_points_y[yy]-c)/axx,5);
            if(!(newx >= a.X && newx<=b.X))  newx = (float)Math.Round(((a.X-b.X)/new_points_y.Length) * yy+a.X, 5);
            pointresult.Add(new PointF(  newx , new_points_y[yy]));
        }  
    }
}


List<string> list_out = pointresult.Select(p => string.Format("{0}; {1}", p.X, p.Y).Replace(",",".")).ToList();
return string.Join(Environment.NewLine, list_out);

Fixed: it is necessary to replace a line in the code, otherwise the loop may be interrupted prematurely.
if(count_x == 0 && count_y == 0 ) continue;

BAZAg · 30.12.2021

myndeswx сказал(а):
Working like a charm, thank you!!!
Your link in signature is not working

My friend, I am very glad that my solution helped you solve the problem.
Happy New Year!

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Need C# snippet

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