source: cpp/common/Convert.h @ 271

// This file is a part of the Framsticks GDK.
// Copyright (C) 1999-2014  Maciej Komosinski and Szymon Ulatowski.  See LICENSE.txt for details.
// Refer to http://www.framsticks.com/ for further information.

#ifndef _CONVERT_H_
#define _CONVERT_H_

#include "nonstd.h"
#include "nonstd_math.h"
#include "nonstd_stl.h"
#include "2d.h"
#include <stdint.h>


typedef XY<double> Pt2D;


struct Convert
{
public:
        static int toInt(string s);
        static float toFloat(string s);
        static string toLowerCase(string s);
        static string toUpperCase(string s);
        static char toLowerCase(char c);
        static char toUpperCase(char c);
        template<class T> static string _toString(const T& value);
        static string toString(unsigned int v);
        static string toString(int v);
        static string toString(short v);
        static string toString(float v);
        static string toString(double v);
        static string zeroPad(string s, int l) { while ((int)s.length() < l) s = string("0") + s; return s; }
        static uint32_t hexToInt(const string& col);

        static double toRadians(double angle) { return angle*M_PI / 180; }
        static double toDegrees(double angle) { return angle / M_PI * 180; }
        static double atan_2(double y, double x) { if (x == 0 && y == 0) return 0; else return atan2(y, x); } //needed by borland 5/6 only?

        static double odleglosc_sq(double x1, double y1, double x2, double y2) //odleglosc do kwadratu, wystarczy do porownywania
        {
                double dx = x2 - x1, dy = y2 - y1; return dx*dx + dy*dy;
        }
        static double odleglosc_sq(const Pt2D& p1, const Pt2D& p2) //odleglosc do kwadratu
        {
                return odleglosc_sq(p1.x, p1.y, p2.x, p2.y);
        }

        static double odleglosc(double x1, double y1, double x2, double y2)     { return sqrt(odleglosc_sq(x1, y1, x2, y2)); }
        static double odleglosc(const Pt2D& p1, const Pt2D& p2)
        {
                return sqrt(odleglosc_sq(p1, p2));
        }

        //static float odleglosc(int x1,int y1,int x2,int y2) {float dx=x1-x2; float dy=y1-y2; return sqrt(dx*dx+dy*dy);}
        //static float odleglosc(float x1,float y1,float x2,float y2) {return sqrt(odleglosc_sq(x1,y1,x2,y2));}
        //static float odleglosc_sq(float x1,float y1,float x2,float y2) {float dx=x1-x2; float dy=y1-y2; return dx*dx+dy*dy;}

        static struct tm localtime(const time_t &timep);//jak ::localtime ale zwraca strukture zamiast wskaznika, ref w parametrze dla wygodnego wywolywania
        static string asctime(const struct tm &tm);//jak ::asctime ale thread safe i bez glupiego \n na koncu, ref w parametrze dla wygodnego wywolywania

        static std::wstring strTOwstr(const char *s)
        {
                string str(s);
                return std::wstring(str.begin(), str.end());
        }

        static string wstrTOstr(const wchar_t *s)
        {
                wstring str(s);
                return string(str.begin(), str.end());
        }

        static string wstrTOutf8(const wchar_t *s)
        {
                if (s == NULL) return "";
                string res;
                wchar_t *wcp = (wchar_t*)s;
                while (*wcp != 0)
                {
                        int c = *wcp;
                        if (c < 0x80) res += c;
                        else if (c < 0x800) { res += 192 + c / 64; res += 128 + c % 64; }
                        else if (c - 0xd800u < 0x800) res += "<ERR-CHAR>";
                        else if (c < 0x10000) { res += 224 + c / 4096; res += 128 + c / 64 % 64; res += 128 + c % 64; }
                        else if (c < 0x110000) { res += 240 + c / 262144; res += 128 + c / 4096 % 64; res += 128 + c / 64 % 64; res += 128 + c % 64; }
                        else res += "<ERR-CHAR>";
                        wcp++;
                }
                return res;
        }
        //#endif
};



struct Angle //normalized angle in radians [0,2pi) and degrees [0,360) with pre-computed sine and cosine and degree as integer [0,359]
{
private:
        double angle; //in radians, read-only
public:
        double angle_deg; //read-only
        int angle_deg_int; //read-only

        Angle() { set(0); }
        Angle(double k) { set(k); }
        Angle(Angle &kt) { set(kt.get()); }
        Angle(double dy, double dx) { set(dy, dx); }
        void set(double k) { k = fmod(k, M_PI * 2); if (k < 0) k += M_PI * 2; angle = k; sine = sin(k); cosine = cos(k); angle_deg = Convert::toDegrees(angle); angle_deg_int = roundToInt(angle_deg); angle_deg_int %= 360; }
        void set(double dy, double dx) { set(Convert::atan_2(dy, dx)); }
        void add(double dk) { set(angle + dk); }
        void add(Angle &kt) { set(angle + kt.get()); }
        double get() { return angle; }
        double sine, cosine;
};


#endif