File indexing completed on 2024-06-16 04:16:10

 /*
     SPDX-FileCopyrightText: 2011 Silvio Heinrich <plassy@web.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #ifndef H_KIS_RADIAN_H
 #define H_KIS_RADIAN_H
 
 #include <cmath>
 
 #define PI       3.14159265358979323846
 #define PI2      6.28318530717958647693 // PI * 2.0
 #define TO_DEG   57.2957795130823208768 // 180.0 / PI
 #define TO_RAD   0.01745329251994329577 // PI / 180.0
 #define RAD_360  6.28318530717958647693 // 360  = 2.0*PI
 #define RAD_270  4.71238898038468985769 // 270° = 3.0*PI / 2.0
 #define RAD_180  3.14159265358979323846 // 180° = PI
 #define RAD_90   1.57079632679489661923 // 90°  = PI/2.0
 
 
 template<class TReal> class KisRadian;
 
 namespace _Private
 {
 struct Value
 {
     template<class T>
     inline static const T& get(const T& value) { return value; }
 
     template<class T>
     inline static const T& get(const KisRadian<T>& rad) { return rad.value(); }
 };
 }
 
 template<class TReal>
 class KisRadian
 {
 public:
 
     KisRadian():
         m_value(TReal(0)) { }
 
     template<class U>
     KisRadian(const KisRadian<U>& rad):
         m_value(rad.m_value) { }
     
     template<class U>
     KisRadian(const U& rad) {
         m_value = normalizeRadians(_Private::Value::get(rad));
     }
     
     static TReal normalizeRadians(TReal rad) {
         rad = std::fmod((TReal)rad, (TReal)PI2);
         return rad < TReal(0) ? (rad + PI2) : rad;
     }
     
     static TReal normalizeDegrees(TReal deg) {
         deg = std::fmod(deg, TReal(360));
         return deg < TReal(0) ? (deg + TReal(360)) : deg;
     }
     
     static KisRadian from90Deg() {
         KisRadian rad;
         rad.m_value = RAD_90;
         return rad;
     }
     
     static KisRadian from180Deg() {
         KisRadian rad;
         rad.m_value = RAD_180;
         return rad;
     }
     
     static KisRadian from270Deg() {
         KisRadian rad;
         rad.m_value = RAD_270;
         return rad;
     }
     
     static KisRadian fromDegrees(const TReal& deg) { return KisRadian(deg * TO_RAD); }
     static TReal     toRadians  (const TReal& deg) { return normalizeDegrees(deg) * TO_RAD; }
     static TReal     toDegrees  (const TReal& rad) { return normalizeRadians(rad) * TO_DEG; }
     
     const TReal& value  () const { return m_value;          }
     TReal        degrees() const { return m_value * TO_DEG; }
     
     TReal scaled(const TReal& min, const TReal& max) const {
         return min + (m_value / PI2) * (max - min);
     }
     
     // ------ operator = ---------------------------------------------------- //
     
     template<class U>
     KisRadian& operator = (const U& rad) {
         m_value = normalizeRadians(_Private::Value::get(rad));
         return *this;
     }
     
     template<class U>
     KisRadian& operator = (const KisRadian<U>& rad) {
         m_value = rad.m_value;
         return *this;
     }
     
     // ------ operator + ---------------------------------------------------- //
     
     template<class U>
     KisRadian& operator += (const U& rad) {
         m_value = normalizeRadians(m_value + _Private::Value::get(rad));
         return *this;
     }
     
     
     friend KisRadian operator + (const KisRadian& l, const KisRadian& r) {
         KisRadian rad(l);
         rad += r;
         return rad;
     }
     
     // ------ operator - ---------------------------------------------------- //
     
     template<class U>
     KisRadian& operator -= (const U& rad) {
         m_value = normalizeRadians(m_value - _Private::Value::get(rad));
         return *this;
     }
     
     friend KisRadian operator - (const KisRadian& l, const KisRadian& r) {
         KisRadian rad(l);
         rad -= r;
         return rad;
     }
     
     // ------ operator * ---------------------------------------------------- //
     
     template<class U>
     KisRadian& operator *= (const U& rad) {
         m_value = normalizeRadians(m_value * _Private::Value::get(rad));
         return *this;
     }
 
     friend KisRadian operator * (const KisRadian& l, const KisRadian& r) {
         KisRadian rad(l);
         rad *= r;
         return rad;
     }
     
     // ------ operator / ---------------------------------------------------- //
     
     template<class U>
     KisRadian& operator /= (const U& rad) {
         m_value = normalizeRadians(m_value / _Private::Value::get(rad));
         return *this;
     }
 
     friend KisRadian operator / (const KisRadian& l, const KisRadian& r) {
         KisRadian rad(l);
         rad /= r;
         return rad;
     }
     
     // ------ operator % ---------------------------------------------------- //
     
     template<class U>
     KisRadian& operator %= (const U& rad) {
         m_value = normalizeRadians(std::fmod(m_value, TReal(_Private::Value::get(rad))));
         return *this;
     }
     
     
     friend KisRadian operator % (const KisRadian& l, const KisRadian& r) {
         KisRadian rad(l);
         rad %= r;
         return rad;
     }
     
 private:
     TReal m_value;
 };
 
 #endif // H_KIS_RADIAN_H