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  1. using System;
  2. using System.Numerics;
  3.  
  4. public class Test
  5. {
  6.     static float LinearFormula(float x, Vector2 a, Vector2 b)
  7.     {
  8.         float slope = (b.Y - a.Y) / (b.X - a.X);
  9.         float dx = x - a.X;
  10.         float dy = slope * dx; 
  11.         return dy + a.Y;
  12.     }
  13.  
  14.     static float CossineFormula(float x)
  15.     {
  16.         return Math.Abs(x) - (float) Math.Cos(x * 3);
  17.     }
  18.  
  19.     static float MyFormula(float x, Vector2 a, Vector2 b)
  20.     {
  21.         return CossineFormula(x) - LinearFormula(x, a, b);
  22.     }
  23.  
  24.     static Vector2 FindIntersection(Vector2 a, Vector2 b)
  25.     {
  26.         float x1 = 2;
  27.         float x2 = 3;
  28.  
  29.         for (int i = 0; i < 100; i++)
  30.         {
  31.             float d = (x2 + x1) / 2;
  32.             if (d == x1 || d == x2) break;
  33.             float v3 = MyFormula(d, a, b);
  34.             if (v3 > 0)
  35.             {
  36.                 x2 = d;
  37.             }
  38.             else
  39.             {
  40.                 x1 = d;
  41.             }
  42.         }
  43.         return new Vector2(x1, CossineFormula(x1));
  44.     }
  45.  
  46.     public static void Main()
  47.     {
  48.         Console.WriteLine(FindIntersection(new Vector2(0, 4), new Vector2(1, 3)));
  49.     }
  50. }
Success #stdin #stdout 0.02s 16572KB
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<2.354912, 1.645088>
https://ideone.com/zKnx83
language:
C# (gmcs 5.20.1)
created:
4 years ago
visibility:
public

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