KD Chart 2: TernaryConstants.cpp Source File

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# 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 <cmath>
    00031
    00032 #include "TernaryConstants.h"
    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