glcolortable.cpp

来自「ncbi源码」· C++ 代码 · 共 120 行

/*
 * ===========================================================================
 * PRODUCTION $Log: glcolortable.cpp,v $
 * PRODUCTION Revision 1000.1  2004/06/01 20:50:39  gouriano
 * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.5
 * PRODUCTION
 * ===========================================================================
 */

/*  $Id: glcolortable.cpp,v 1000.1 2004/06/01 20:50:39 gouriano Exp $
 * ===========================================================================
 *
 *                            PUBLIC DOMAIN NOTICE
 *               National Center for Biotechnology Information
 *
 *  This software/database is a "United States Government Work" under the
 *  terms of the United States Copyright Act.  It was written as part of
 *  the author's official duties as a United States Government employee and
 *  thus cannot be copyrighted.  This software/database is freely available
 *  to the public for use. The National Library of Medicine and the U.S.
 *  Government have not placed any restriction on its use or reproduction.
 *
 *  Although all reasonable efforts have been taken to ensure the accuracy
 *  and reliability of the software and data, the NLM and the U.S.
 *  Government do not and cannot warrant the performance or results that
 *  may be obtained by using this software or data. The NLM and the U.S.
 *  Government disclaim all warranties, express or implied, including
 *  warranties of performance, merchantability or fitness for any particular
 *  purpose.
 *
 *  Please cite the author in any work or product based on this material.
 *
 * ===========================================================================
 *
 * Authors:  Mike DiCuccio
 *
 * File Description:
 *    Incremental and mutually contrastive color table generator.
 */

#include <ncbi_pch.hpp>
#include <gui/opengl/glcolortable.hpp>


BEGIN_NCBI_SCOPE


CGlColorTable::CGlColorTable()
    : m_MaxItems(8),
      m_ColorStep(1.0f),
      m_MinColor(0.0f),
      m_MaxColor(1.0f),
      m_ColorDiff(1.0f)
{
}


CGlColorTable::CGlColorTable(int items, float min_color, float max_color)
    : m_MaxItems(items),
      m_ColorStep(1.0f),
      m_MinColor(min_color),
      m_MaxColor(max_color),
      m_ColorDiff(1.0f)
{
    if (m_MaxColor < m_MinColor) {
        std::swap(m_MaxColor, m_MinColor);
    }
    m_ColorDiff = m_MaxColor - m_MinColor;
    x_CalcColorStep();
}


CGlColor CGlColorTable::GetColor(int i) const
{
    i = abs (i % m_MaxItems);

    int reps = i / 7;
    int idx  = i % 7 + 1;

    CGlColor color;
    float val = (reps + 1) * m_ColorStep + m_MinColor;

    color.SetRed  (val * ((idx & 0x01)     ));
    color.SetGreen(val * ((idx & 0x02) >> 1));
    color.SetBlue (val * ((idx & 0x04) >> 2));

    return color;
}


END_NCBI_SCOPE


/*
 * ===========================================================================
 * $Log: glcolortable.cpp,v $
 * Revision 1000.1  2004/06/01 20:50:39  gouriano
 * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.5
 *
 * Revision 1.5  2004/05/21 22:27:45  gorelenk
 * Added PCH ncbi_pch.hpp
 *
 * Revision 1.4  2003/01/15 21:14:21  dicuccio
 * Fixed bugs in indexing colors - must index only 7 (not 8) colors
 *
 * Revision 1.3  2003/01/13 13:10:11  dicuccio
 * Namespace clean-up.  Retired namespace gui -> converted all to namespace ncbi.
 * Moved all FLUID-generated code into namespace ncbi.
 *
 * Revision 1.2  2003/01/10 15:28:10  dicuccio
 * Changed logic of CGlColorTable - support m_MaxItems colors as a rotating color
 * buffer (i.e., index = index mod m_MaxItems)
 *
 * Revision 1.1  2002/11/22 18:06:28  dicuccio
 * Initial revision.
 *
 * ===========================================================================
 */