/*
 * PVVMUD a 3D MUD
 * Copyright (C) 1998-1999  Programvareverkstedet (pvv@pvv.org)
 *
 * 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.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#include <math.h>
#include "pvvmud.H"
#include "direction.H"

#define NORMALIZE(index)   \
  direction[index] -= floor(direction[index]/360.0) * 360.0;


CDirection::CDirection(){
  direction[0] = 0;
  direction[1] = 0;
  direction[2] = 0;
}

CDirection::CDirection(double * direction){
  this->direction[0] = direction[0];
  this->direction[1] = direction[1];
  this->direction[2] = direction[2];
  normalize();
}


CDirection::CDirection(double h, double r, double p){
  direction[0] = h;
  direction[1] = r;
  direction[2] = p;
  normalize();
}

CDirection& CDirection::operator= (const CDirection& direction) {
  this->direction[0] = direction.direction[0];
  this->direction[1] = direction.direction[1];
  this->direction[2] = direction.direction[2];
  return *this;
}

CDirection& CDirection::operator+= (const CDirection& direction) {
  this->direction[0] += direction.direction[0];
  this->direction[1] += direction.direction[1];
  this->direction[2] += direction.direction[2];
  normalize();
  return *this;
}

CDirection CDirection::operator+ (const CDirection& direction) {
  CDirection result;
  result.direction[0] = this->direction[0] + direction.direction[0];
  result.direction[1] = this->direction[1] + direction.direction[1];
  result.direction[2] = this->direction[2] + direction.direction[2];
  result.normalize();
  return result;
}

CDirection CDirection::operator- () const {
  CDirection result;
  result.direction[0] = -direction[0];
  result.direction[1] = -direction[1];
  result.direction[2] = -direction[2];
  result.normalize();
  return result;
}

CDirection CDirection::operator* (double scale) const {
  CDirection result;
  result.direction[0] = direction[0]*scale;
  result.direction[1] = direction[1]*scale;
  result.direction[2] = direction[2]*scale;
  result.normalize();
  return result;
}

void CDirection::normalize(){
  NORMALIZE(0);
  NORMALIZE(1);
  NORMALIZE(2);
}

double * CDirection::getVector(){
  return direction;
}

double CDirection::getValue(int ii) const {
  return direction[ii];
}

void CDirection::setValue(int ii,double value) {
  direction[ii] += value;
  NORMALIZE(ii);
}

double CDirection::rotateHeading(double deltaHeading){
  direction[0] += deltaHeading;
  NORMALIZE(0);
  return direction[0];
}

double CDirection::rotateRoll(double deltaRoll){
  direction[1] += deltaRoll;
  NORMALIZE(1);
  return direction[1];
}

double CDirection::rotatePitch(double deltaPitch){
  direction[2] += deltaPitch;
  NORMALIZE(2);
  return direction[2];
}

ostream& operator<<(ostream&s,const CDirection& d){
  return s << "(" << d.getHeading() << "," << d.getRoll() 
           << "," << d.getPitch() << ")";
}