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rotation.cpp from FreePop at Krugle

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/***************************************************************************
                          rotation.cpp  -  description
                             -------------------
    begin                : Fri Sep 6 2002
    copyright            : (C) 2002 by Brendon Higgins
    email                : freepop-devel@lists.sourceforge.net
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include <rotation.h>

const Rotation Rotation::CLOCKWISE(1);
const Rotation Rotation::ANTICLOCKWISE(3);

Rotation::Rotation() {
    n = 0;
}

Rotation::Rotation(int r) {
    n = r;
}

Rotation::Rotation(const Rotation& r) {
    n = r.n;
}

void Rotation::setClock(int r) {
    // Works for both positive and negative numbers!
    n = r & 3;
}
    
int Rotation::getClock() const {
    return n;
}

void Rotation::setAnti(int r) {
    setClock(-r);
}
    
int Rotation::getAnti() const {
    // We & 3 so that if n == 0, return != 4
    return (4 - n) & 3;
}

Rotation& Rotation::incClock() {
    setClock(n + 1);
    return *this;
}

Rotation& Rotation::decClock() {
    setClock(n - 1);
    return *this;
}

Rotation& Rotation::incAnti() {
    setClock(n - 1);
    return *this;
}

Rotation& Rotation::decAnti() {
    setClock(n + 1);
    return *this;
}

Rotation& Rotation::operator+=(const Rotation& r) {
    setClock(n + r.n);
    return *this;
}

Rotation Rotation::operator-() const {
    return Rotation((4 - n) & 3);
}

See more files for this project here

FreePop

FreePop is a multi-platform tile-based game based on the great old game Populous 2 by Bullfrog Productions Ltd., but much improved.

Project homepage: http://sourceforge.net/projects/freepop
Programming language(s): C++
License: other

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  server/
    Makefile.am
    contagion.cpp
    contagion.h
  Makefile.am
  common.cpp
  common.h
  corner.cpp
  corner.h
  crops.cpp
  crops.h
  entity.cpp
  entity.h
  entityfactory.cpp
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  peepmagnet.cpp
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  rock.cpp
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  rotation.cpp
  rotation.h
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  swamp.cpp
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