TernaryConstants.cpp

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00001 /* -*- Mode: C++ -*-
00002    KDChart - a multi-platform charting engine
00003    */
00004 
00005 /****************************************************************************
00006  ** Copyright (C) 2005-2007 Klarälvdalens Datakonsult AB.  All rights reserved.
00007  **
00008  ** This file is part of the KD Chart library.
00009  **
00010  ** This file may be distributed and/or modified under the terms of the
00011  ** GNU General Public License version 2 as published by the Free Software
00012  ** Foundation and appearing in the file LICENSE.GPL included in the
00013  ** packaging of this file.
00014  **
00015  ** Licensees holding valid commercial KD Chart licenses may use this file in
00016  ** accordance with the KD Chart Commercial License Agreement provided with
00017  ** the Software.
00018  **
00019  ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00020  ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00021  **
00022  ** See http://www.kdab.net/kdchart for
00023  **   information about KD Chart Commercial License Agreements.
00024  **
00025  ** Contact info@kdab.net if any conditions of this
00026  ** licensing are not clear to you.
00027  **
00028  **********************************************************************/
00029 
00030 #include "TernaryConstants.h"
00031 
00032 #include <cmath>
00033 
00034 extern const double Sqrt3 = sqrt( 3.0 );
00035 extern const double TriangleWidth = 1.0;
00036 extern const double TriangleHeight = 0.5 * Sqrt3;
00037 extern const QPointF TriangleTop( 0.5, TriangleHeight );
00038 extern const QPointF TriangleBottomLeft( 0.0, 0.0 );
00039 extern const QPointF TriangleBottomRight( 1.0, 0.0 );
00040 extern const QPointF AxisVector_C_A( TriangleTop - TriangleBottomRight );
00041 extern const QPointF Norm_C_A( -AxisVector_C_A.y(), AxisVector_C_A.x() );
00042 extern const QPointF AxisVector_B_A( TriangleTop );
00043 extern const QPointF Norm_B_A( -AxisVector_B_A.y(), AxisVector_B_A.x() );
00044 extern const QPointF AxisVector_B_C( TriangleBottomRight );
00045 extern const QPointF Norm_B_C( -AxisVector_B_C.y(), AxisVector_B_C.x() );
00046 
00047 extern const double RelMarkerLength = 0.03 * TriangleWidth;
00048 extern const QPointF FullMarkerDistanceBC( RelMarkerLength * Norm_B_C );
00049 extern const QPointF FullMarkerDistanceAC( -RelMarkerLength * Norm_C_A );
00050 extern const QPointF FullMarkerDistanceBA( RelMarkerLength * Norm_B_A );
00051 

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