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155 lines
3.7 KiB
C++
155 lines
3.7 KiB
C++
/* Residual - A 3D game interpreter
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*
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* Residual is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* $URL$
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* $Id$
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*/
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#ifndef MATH_ANGLE_H
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#define MATH_ANGLE_H
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#include "common/scummsys.h"
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namespace Common {
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class Debug;
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}
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namespace Math {
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class Angle {
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public:
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/**
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* Construct an angle object.
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*
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* \param degrees The angle, in degrees. Default is 0.
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*/
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Angle(float degrees = 0);
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/**
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* Construct and angle object, copying an already existing one.
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*
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* \param a The angle to copy.
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*/
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Angle(const Angle &a);
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/**
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* Normalize the angle in a [x; x + 360] range and return the object.
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*
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* \param low The lower bound of the range, in degrees.
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*/
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Angle &normalize(float low);
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void setDegrees(float degrees);
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void setRadians(float radians);
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float getDegrees() const;
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float getRadians() const;
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/**
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* Returns the degrees of the angle, in the defined range.
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*
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* \param low The lower bound of the range, in degrees.
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*/
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float getDegrees(float low) const;
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/**
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* Returns the radianss of the angle, in the defined range.
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*
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* \param low The lower bound of the range, in degrees.
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*/
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float getRadians(float low) const;
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float getCosine() const;
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float getSine() const;
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float getTangent() const;
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Angle &operator=(const Angle &a);
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Angle &operator=(float degrees);
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Angle &operator+=(const Angle &a);
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Angle &operator+=(float degrees);
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Angle &operator-=(const Angle &a);
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Angle &operator-=(float degrees);
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/**
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* Build an angle object.
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*
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* \param radians The angle, in radians.
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*/
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static Angle fromRadians(float radians);
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static Angle arcCosine(float x);
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static Angle arcSine(float x);
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static Angle arcTangent(float x);
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static Angle arcTangent2(float y, float x);
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private:
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float _degrees;
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};
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inline Angle operator-(const Angle &a) {
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return Angle(-a.getDegrees());
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}
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inline Angle operator+(const Angle &a1, const Angle &a2) {
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return Angle(a1.getDegrees() + a2.getDegrees());
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}
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inline Angle operator-(const Angle &a1, const Angle &a2) {
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return Angle(a1.getDegrees() - a2.getDegrees());
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}
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inline Angle operator*(const Angle &a1, float f) {
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return Angle(a1.getDegrees() * f);
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}
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inline Angle operator*(float f, const Angle &a2) {
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return Angle(a2.getDegrees() * f);
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}
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inline Angle operator/(const Angle &a1, float f) {
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return Angle(a1.getDegrees() / f);
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}
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inline Angle operator/(float f, const Angle &a2) {
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return Angle(a2.getDegrees() / f);
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}
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inline bool operator==(const Angle &a1, const Angle &a2) {
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return fabsf(a1.getDegrees() - a2.getDegrees()) < 0.001;
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}
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inline bool operator!=(const Angle &a1, const Angle &a2) {
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return !(a1 == a2);
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}
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inline bool operator<(const Angle &a1, const Angle &a2) {
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return a1.getDegrees() < a2.getDegrees();
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}
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inline bool operator>(const Angle &a1, const Angle &a2) {
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return a1.getDegrees() > a2.getDegrees();
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}
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}
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Common::Debug &operator<<(Common::Debug dbg, const Math::Angle &a);
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#endif
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