mirror of
https://port.numenaute.org/aleajactaest/khanat-code-old.git
synced 2024-12-02 08:15:59 +00:00
125 lines
4.9 KiB
C++
125 lines
4.9 KiB
C++
// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
|
|
// Copyright (C) 2010 Winch Gate Property Limited
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as
|
|
// published by the Free Software Foundation, either version 3 of the
|
|
// License, or (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
|
|
|
|
#ifndef RY_ANGLE_H
|
|
#define RY_ANGLE_H
|
|
|
|
#include "nel/misc/types_nl.h"
|
|
#include "nel/misc/vector_2d.h"
|
|
|
|
#include <string>
|
|
|
|
class CAngle
|
|
{
|
|
public:
|
|
// enum for pseudo contante
|
|
enum
|
|
{
|
|
// the pi value
|
|
PI = 0x8000
|
|
};
|
|
|
|
CAngle(): _data(0) {}
|
|
|
|
inline CAngle(const CAngle &other) : _data(other._data) {}
|
|
inline CAngle(const sint16 &val) : _data(val) {}
|
|
inline CAngle(const sint32 &val) : _data((sint16)val) {}
|
|
inline CAngle(const uint16 &val) : _data((sint16)val) {}
|
|
inline CAngle(const uint32 &val) : _data((sint16)val) {}
|
|
inline CAngle(const double &val)
|
|
{
|
|
// This code correct a nasty bug :
|
|
// GCC and MSVC don't handle the cast from a float
|
|
// into a 16 bit signed interger when the
|
|
// float value overflow inside the integer.
|
|
// It seeems that GCC bound the value to 0x8000 (-32768) and 0x7fff (32767)
|
|
// but MSVC just truncate the exedent bits (as if it perform a float
|
|
// to 32 bit interger conversion first).
|
|
// NB : Fundamentaly, the problem is that it is bad to cast something with an overflow... ;)
|
|
sint32 a = sint32(val*(PI/NLMISC::Pi));
|
|
while (a >= PI)
|
|
a-=2*PI;
|
|
while (a < -PI)
|
|
a+=2*PI;
|
|
|
|
_data = sint16(a);
|
|
}
|
|
|
|
#ifdef NL_COMP_VC6
|
|
inline CAngle(const sint &val) : _data((sint16)val) {}
|
|
inline CAngle(const uint &val) : _data((sint16)val) {}
|
|
#endif
|
|
|
|
template <class C> bool operator>(const C &other) const { return _data>CAngle(other)._data; }
|
|
template <class C> bool operator<(const C &other) const { return _data<CAngle(other)._data; }
|
|
template <class C> bool operator>=(const C &other) const { return _data>=CAngle(other)._data; }
|
|
template <class C> bool operator<=(const C &other) const { return _data<=CAngle(other)._data; }
|
|
template <class C> bool operator==(const C &other) const { return _data==CAngle(other)._data; }
|
|
template <class C> bool operator!=(const C &other) const { return _data!=CAngle(other)._data; }
|
|
|
|
template <class C> CAngle &operator=(const C &val) { _data=CAngle(val)._data; return *this; }
|
|
template <class C> CAngle &operator+=(const C &val) { _data+=CAngle(val)._data; return *this; }
|
|
template <class C> CAngle &operator-=(const C &val) { _data-=CAngle(val)._data; return *this; }
|
|
template <class C> CAngle &operator*=(const C &val) { _data*=val; return *this; }
|
|
template <class C> CAngle &operator/=(const C &val) { _data/=val; return *this; }
|
|
|
|
template <class C> CAngle operator+(const C &val) { return CAngle(_data+CAngle(val)._data); }
|
|
template <class C> CAngle operator-(const C &val) { return CAngle(_data-CAngle(val)._data); }
|
|
template <class C> CAngle operator*(const C &val) { return CAngle(sint16(_data*val)); }
|
|
|
|
CAngle operator/(const double &val) const { return CAngle((sint16)(_data/val)); }
|
|
float operator/(const CAngle &val) const { return (float)_data/(float)val._data; }
|
|
|
|
CAngle &operator-() { _data=-_data; return *this; }
|
|
|
|
float asRadians() const { return (float)((float)_data*(NLMISC::Pi/PI)); }
|
|
sint16 asRawSint16() const { return _data; }
|
|
int asDegrees() const { return (360*(uint16)_data+PI)/(2*PI); }
|
|
|
|
const char* asCompassHeading() { return "NOT IMPLEMENTED YET"; }
|
|
NLMISC::CVector2d asVector2d() const { float radians=asRadians();return NLMISC::CVector2d(cos(radians), sin(radians)); }
|
|
|
|
inline static const CAngle &pi() { static CAngle p(PI); return p; }
|
|
|
|
private:
|
|
sint16 _data;
|
|
};
|
|
|
|
|
|
//-----------------------------------------------
|
|
// computeShortestAngle :
|
|
// Compute the angle between a source and a destination using the shortest way.
|
|
// \param from : angle between -Pi and Pi;
|
|
// \param to : angle between -Pi and Pi;
|
|
//-----------------------------------------------
|
|
inline double computeShortestAngle(double from, double to)
|
|
{
|
|
double difAngle = to - from;
|
|
if (difAngle<-NLMISC::Pi) // Angle in the wrong direction.
|
|
return difAngle+2.0*NLMISC::Pi;
|
|
else
|
|
{
|
|
if (difAngle>NLMISC::Pi) // Angle in the wrong direction.
|
|
return difAngle-2.0*NLMISC::Pi;
|
|
else
|
|
return difAngle;
|
|
}
|
|
}// computeShortestAngle //
|
|
|
|
#endif
|
|
|