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66 lines
1.8 KiB
66 lines
1.8 KiB
/* ============================================================
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*
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* This file is a part of digiKam project
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* http://www.digikam.org
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*
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* Date : 2005-01-18
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* Description : triangle geometry calculation class.
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*
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* Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software Foundation;
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* either version 2, or (at your option)
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* any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* ============================================================ */
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// C++ includes.
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#include <cstdio>
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#include <cstdlib>
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#include <cmath>
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// Local includes.
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#include "triangle.h"
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namespace DigikamPerspectiveImagesPlugin
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{
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Triangle::Triangle(TQPoint A, TQPoint B, TQPoint C)
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{
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m_a = distanceP2P(B, C);
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m_b = distanceP2P(A, C);
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m_c = distanceP2P(A, B);
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}
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float Triangle::angleABC(void)
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{
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return( 57.295779513082 * acos( (m_b*m_b - m_a*m_a - m_c*m_c ) / (-2*m_a*m_c ) ) );
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}
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float Triangle::angleACB(void)
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{
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return( 57.295779513082 * acos( (m_c*m_c - m_a*m_a - m_b*m_b ) / (-2*m_a*m_b ) ) );
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}
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float Triangle::angleBAC(void)
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{
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return( 57.295779513082 * acos( (m_a*m_a - m_b*m_b - m_c*m_c ) / (-2*m_b*m_c ) ) );
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}
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float Triangle::distanceP2P(const TQPoint& p1, const TQPoint& p2)
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{
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return(sqrt( abs( p2.x()-p1.x() ) * abs( p2.x()-p1.x() ) +
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abs( p2.y()-p1.y() ) * abs( p2.y()-p1.y() ) ));
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}
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} // NameSpace DigikamPerspectiveImagesPlugin
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