vect.cpp

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/*  Ekos guide tool
    Copyright (C) 2012 Andrew Stepanenko

    Modified by Jasem Mutlaq <mutlaqja@ikarustech.com> for KStars.

    This application 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 "vect.h"

#include <math.h>
#include <stdlib.h>

//---------------------------------------------------------------------------


Vector operator ^ (const Vector& u, const Vector& v)
{
  return Vector ( u.y*v.z - u.z*v.y,
                  u.z*v.x - u.x*v.z,
                  u.x*v.y - u.y*v.x
                );
}

Vector RndVector ()
{
 Vector v (rand() - 0.5*RAND_MAX, rand() - 0.5*RAND_MAX,
           rand() - 0.5*RAND_MAX
          );
 return Normalize( v );         
}

Vector& Clip( Vector& v)
{
  if( v.x < 0.0 ) v.x = 0.0;
  else
      if( v.x > 1.0 ) v.x = 1.0;
  if( v.y < 0.0 ) v.y = 0.0;
  else
      if( v.y > 1.0 ) v.y = 1.0;
  if( v.z < 0.0 ) v.z = 0.0;
  else
      if( v.z > 1.0 ) v.z = 1.0;

  return v;
}