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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "common/streamdebug.h"
#include "math/angle.h"
#include "math/utils.h"
namespace Math {
Angle::Angle(float degrees) :
_degrees(degrees) {
}
Angle::Angle(const Angle &a) :
_degrees(a._degrees) {
}
Angle &Angle::normalize(float low) {
_degrees = getDegrees(low);
return *this;
}
Angle &Angle::clampDegrees(float mag) {
_degrees = getDegrees(-180.f);
if (_degrees >= mag)
setDegrees(mag);
if (_degrees <= -mag)
setDegrees(-mag);
return *this;
}
Angle &Angle::clampDegrees(float min, float max) {
_degrees = getDegrees(-180.f);
if (_degrees >= max)
setDegrees(max);
if (_degrees <= min)
setDegrees(min);
return *this;
}
void Angle::setDegrees(float degrees) {
_degrees = degrees;
}
void Angle::setRadians(float radians) {
_degrees = rad2deg(radians);
}
float Angle::getDegrees() const {
return _degrees;
}
float Angle::getRadians() const {
return deg2rad(getDegrees());
}
float Angle::getDegrees(float low) const {
float degrees = _degrees;
if (degrees >= low + 360.f) {
float x = floor((degrees - low) / 360.f);
degrees -= 360.f * x;
} else if (degrees < low) {
float x = floor((degrees - low) / 360.f);
degrees -= 360.f * x;
}
return degrees;
}
float Angle::getRadians(float low) const {
float d = getDegrees(low);
return deg2rad(d);
}
float Angle::getCosine() const {
return cosf(getRadians());
}
float Angle::getSine() const {
return sinf(getRadians());
}
float Angle::getTangent() const {
return tanf(getRadians());
}
Angle &Angle::operator=(const Angle &a) {
_degrees = a._degrees;
return *this;
}
Angle &Angle::operator=(float degrees) {
setDegrees(degrees);
return *this;
}
Angle &Angle::operator+=(const Angle &a) {
setDegrees(_degrees + a._degrees);
return *this;
}
Angle &Angle::operator+=(float degrees) {
setDegrees(_degrees + degrees);
return *this;
}
Angle &Angle::operator-=(const Angle &a) {
setDegrees(_degrees - a._degrees);
return *this;
}
Angle &Angle::operator-=(float degrees) {
setDegrees(_degrees - degrees);
return *this;
}
Angle Angle::fromRadians(float radians) {
return Angle(rad2deg(radians));
}
Angle Angle::arcCosine(float x) {
Angle a;
a.setRadians(acosf(x));
return a;
}
Angle Angle::arcSine(float x) {
Angle a;
a.setRadians(asinf(x));
return a;
}
Angle Angle::arcTangent(float x) {
Angle a;
a.setRadians(atanf(x));
return a;
}
Angle Angle::arcTangent2(float y, float x) {
Angle a;
a.setRadians(atan2f(y, x));
return a;
}
Common::StreamDebug &operator<<(Common::StreamDebug &dbg, const Math::Angle &a) {
dbg.nospace() << "Angle(" << a.getDegrees(-180) << ")";
return dbg.space();
}
}
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