Distance From Point To Line : Geometry « Development Class « C# / C Sharp

1. C# / C Sharp
2. Development Class
3. Geometry

Distance From Point To Line

         

using System;

namespace ComputationalGeometry.Shapes
{
    public static class MathUtility
    {


        public static double DistanceFromPointToLine(Point2D point, Line2D line)
        {
            // given a line based on two points, and a point away from the line,
            // find the perpendicular distance from the point to the line.
            // see http://mathworld.wolfram.com/Point-LineDistance2-Dimensional.html
            // for explanation and defination.
            Point2D l1 = line.InitialPoint;
            Point2D l2 = line.TerminalPoint;

            return Math.Abs((l2.X - l1.X)*(l1.Y - point.Y) - (l1.X - point.X)*(l2.Y - l1.Y))/
                    Math.Sqrt(Math.Pow(l2.X - l1.X, 2) + Math.Pow(l2.Y - l1.Y, 2));
        }
    }
}

   
    
    
    
    
    
    
    
    
  

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