fork(1) download
copy 
  1. #include <cmath>
  2. #include <iostream>
  3.  
  4. struct Obj
  5. {
  6. 	double x, y, dir;
  7. 	Obj(double x, double y, double dir) :x{ x }, y{ y }, dir{ dir } {}
  8. 	double GetHeadingAngle(Obj const &other)
  9. 	{
  10. 		double heading = std::atan2(other.x - this->x, other.y - this->y) * 180 / 3.1415926535897 - this->dir;
  11. 		if (heading < -180) heading += 360;
  12. 		if (heading > 180) heading -= 360;
  13. 		return heading;
  14. 	}
  15. };
  16.  
  17.  
  18. int main() 
  19. {
  20. 	Obj A(10, 10, 90);
  21.  
  22. 	Obj B(15, 5, 0);
  23. 	std::cout << A.GetHeadingAngle(B) << std::endl; // 45
  24.  
  25. 	Obj C(10, 15, 0);
  26. 	std::cout << A.GetHeadingAngle(C) << std::endl; // -90
  27.  
  28. 	Obj D(5, 5, 0);
  29. 	std::cout << A.GetHeadingAngle(D) << std::endl; // 135
  30.  
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 4572KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
45
-90
135
https://ideone.com/MyKdOy
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!