Angle.h

// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0.If a copy of the MPL was not distributed with this
// file, You can obtain one at https ://mozilla.org/MPL/2.0/.
 
#ifndef ANGLE_H
#define ANGLE_H
 
namespace Passer {
namespace LinearAlgebra {
 
static float pi = 3.1415927410125732421875F;
 
static float Rad2Deg = 360.0f / (pi * 2);
static float Deg2Rad = (pi * 2) / 360.0f;
 
template <typename T> class AngleOf {
public:
  AngleOf<T>();
 
  const static AngleOf<T> zero;
  // const static AngleOf<T> deg90;
  // const static AngleOf<T> deg180;
 
  static AngleOf<T> Degrees(float degrees);
  static AngleOf<T> Radians(float radians);
 
  static AngleOf<T> Binary(T rawValue);
 
  float InDegrees() const;
  float InRadians() const;
 
  T GetBinary() const;
  void SetBinary(T rawValue);
 
  bool operator==(const AngleOf<T> angle) const;
  bool operator>(AngleOf<T> angle) const;
  bool operator>=(AngleOf<T> angle) const;
  bool operator<(AngleOf<T> angle) const;
  bool operator<=(AngleOf<T> angle) const;
 
  static signed int Sign(AngleOf<T> angle);
  static AngleOf<T> Abs(AngleOf<T> angle);
 
  AngleOf<T> operator-() const;
  AngleOf<T> operator-(const AngleOf<T> &angle) const;
  AngleOf<T> operator+(const AngleOf<T> &angle) const;
  AngleOf<T> operator+=(const AngleOf<T> &angle);
 
  friend AngleOf<T> operator*(const AngleOf<T> &angle, float factor) {
    return AngleOf::Degrees((float)angle.InDegrees() * factor);
  }
  friend AngleOf<T> operator*(float factor, const AngleOf<T> &angle) {
    return AngleOf::Degrees((float)factor * angle.InDegrees());
  }
 
  void Normalize();
  static AngleOf<T> Normalize(AngleOf<T> angle);
  static AngleOf<T> Clamp(AngleOf<T> angle, AngleOf<T> min, AngleOf<T> max);
  // static AngleOf<T> Difference(AngleOf<T> a, AngleOf<T> b) {
  //   AngleOf<T> r = Normalize(b.InDegrees() - a.InDegrees());
  //   return r;
  // };
 
  static AngleOf<T> MoveTowards(AngleOf<T> fromAngle, AngleOf<T> toAngle,
                                float maxAngle);
 
  static float Cos(AngleOf<T> angle);
  static float Sin(AngleOf<T> angle);
  static float Tan(AngleOf<T> angle);
 
  static AngleOf<T> Acos(float f);
  static AngleOf<T> Asin(float f);
  static AngleOf<T> Atan(float f);
  static AngleOf<T> Atan2(float y, float x);
 
  static float CosineRuleSide(float a, float b, AngleOf<T> gamma);
  static AngleOf<T> CosineRuleAngle(float a, float b, float c);
 
  static AngleOf<T> SineRuleAngle(float a, AngleOf<T> beta, float c);
 
private:
  T value;
 
  AngleOf<T>(T rawValue);
};
 
using AngleSingle = AngleOf<float>;
using Angle16 = AngleOf<signed short>;
using Angle8 = AngleOf<signed char>;
 
} // namespace LinearAlgebra
} // namespace Passer
using namespace Passer::LinearAlgebra;
 
#endif