// Simple three-vector class
// Glen Cowan, RHUL Physics Dept., 4 December 2001.

#ifndef THREEVECTOR_H
#define THREEVECTOR_H

class ThreeVector {
public:
  ThreeVector();
  ThreeVector (float, float, float);
  float x();
  float y();
  float z();
  void set(float, float, float);
  float r();
  float cosTheta();
  float theta();
  float rho();             // sqrt (x^2 + y^2)
  float cosPhi();
  float sinPhi();
  float phi();
private:
  float xVal;
  float yVal;
  float zVal;
};

float dotProd (ThreeVector, ThreeVector);

#endif