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/*
* kis_vec.cc - part of KImageShop
*
* Copyright (c) 1999 Matthias Elter <me@kde.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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "kis_vec.h"
KisVector2D& KisVector2D::normalize()
{
double length, ilength;
length = m_x*m_x + m_y*m_y;
length = sqrt (length);
if (length > epsilon)
{
ilength = 1/length;
m_x *= ilength;
m_y *= ilength;
}
return *this;
}
KisVector3D& KisVector3D::normalize()
{
double length, ilength;
length = m_x*m_x + m_y*m_y + m_z*m_z;
length = sqrt (length);
if (length > epsilon)
{
ilength = 1/length;
m_x *= ilength;
m_y *= ilength;
m_z *= ilength;
}
return *this;
}
KisVector3D& KisVector3D::crossProduct(const KisVector3D &v)
{
double x,y,z;
x = m_y*v.m_z - m_z*v.m_y;
y = m_z*v.m_x - m_x*v.m_z;
z = m_x*v.m_y - m_y*v.m_x;
m_x=x; m_y=y; m_z=z;
return *this;
}
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