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fixed force calculation in elastic model. Still need to figure out what connexions we show

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git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@3690 b45a01b8-16f6-495d-af2f-9b41ad6348cc
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csoler 2010-10-22 20:47:08 +00:00
parent b7b8cfe860
commit c4b5f41446
9 changed files with 941 additions and 1014 deletions
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112
retroshare-gui/src/gui/elastic/edge.cpp
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@ -1,36 +1,41 @@
/****************************************************************************
**
** Copyright (C) 2006-2007 Trolltech ASA. All rights reserved.
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file. Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
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** or contact the sales department at sales@trolltech.com.
**
** In addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.0, which can be found at
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** GPL_EXCEPTION.txt in this package.
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****************************************************************************/
@ -88,6 +93,8 @@ void Edge::adjust()
QLineF line(mapFromItem(source, 0, 0), mapFromItem(dest, 0, 0));
qreal length = line.length();
if(length==0.0f)
length=1.0 ;
QPointF edgeOffset((line.dx() * 10) / length, (line.dy() * 10) / length);
prepareGeometryChange();
@ -119,21 +126,48 @@ void Edge::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
painter->setPen(QPen(Qt::black, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
painter->drawLine(line);
return ;
// Draw the arrows if there's enough room
double angle = ::acos(line.dx() / line.length());
if (line.dy() >= 0)
angle = TwoPi - angle;
QPointF sourceArrowP1 = sourcePoint + QPointF(sin(angle + Pi / 3) * arrowSize,
cos(angle + Pi / 3) * arrowSize);
QPointF sourceArrowP2 = sourcePoint + QPointF(sin(angle + Pi - Pi / 3) * arrowSize,
cos(angle + Pi - Pi / 3) * arrowSize);
QPointF destArrowP1 = destPoint + QPointF(sin(angle - Pi / 3) * arrowSize,
cos(angle - Pi / 3) * arrowSize);
QPointF destArrowP2 = destPoint + QPointF(sin(angle - Pi + Pi / 3) * arrowSize,
cos(angle - Pi + Pi / 3) * arrowSize);
float length = line.length() ;
float cos_theta,sin_theta ;
if(length == 0.0f)
{
cos_theta = 1.0f ;
sin_theta = 0.0f ;
}
else
{
cos_theta = line.dx() / length ;
sin_theta =-line.dy() / length ;
}
static const float cos_pi_over_3 = 0.5 ;
static const float sin_pi_over_3 = 0.5 * sqrt(3) ;
static const float cos_2_pi_over_3 =-0.5 ;
static const float sin_2_pi_over_3 = 0.5 * sqrt(3) ;
float cos_theta_plus_pi_over_3 = cos_theta * cos_pi_over_3 - sin_theta * sin_pi_over_3 ;
float sin_theta_plus_pi_over_3 = sin_theta * cos_pi_over_3 + cos_theta * sin_pi_over_3 ;
float cos_theta_mins_pi_over_3 = cos_theta_plus_pi_over_3 + 2 * sin_theta * sin_pi_over_3 ;
float sin_theta_mins_pi_over_3 = sin_theta_plus_pi_over_3 - 2 * cos_theta * sin_pi_over_3 ;
float cos_theta_plus_2_pi_over_3 = cos_theta * cos_2_pi_over_3 - sin_theta * sin_2_pi_over_3 ;
float sin_theta_plus_2_pi_over_3 = sin_theta * cos_2_pi_over_3 + cos_theta * sin_2_pi_over_3 ;
float cos_theta_mins_2_pi_over_3 = cos_theta_plus_2_pi_over_3 + 2 * sin_theta * sin_2_pi_over_3 ;
float sin_theta_mins_2_pi_over_3 = sin_theta_plus_2_pi_over_3 - 2 * cos_theta * sin_2_pi_over_3 ;
QPointF sourceArrowP1 = sourcePoint + QPointF( sin_theta_plus_pi_over_3 * arrowSize, cos_theta_plus_pi_over_3 * arrowSize);
QPointF sourceArrowP2 = sourcePoint + QPointF(sin_theta_plus_2_pi_over_3 * arrowSize, cos_theta_plus_2_pi_over_3 * arrowSize);
QPointF destArrowP1 = destPoint + QPointF( sin_theta_mins_pi_over_3 * arrowSize, cos_theta_mins_pi_over_3 * arrowSize);
QPointF destArrowP2 = destPoint + QPointF(sin_theta_mins_2_pi_over_3 * arrowSize, cos_theta_mins_2_pi_over_3 * arrowSize);
painter->setBrush(Qt::black);
painter->drawPolygon(QPolygonF() << line.p1() << sourceArrowP1 << sourceArrowP2);
painter->drawPolygon(QPolygonF() << line.p2() << destArrowP1 << destArrowP2);
painter->drawConvexPolygon(QPolygonF() << line.p1() << sourceArrowP1 << sourceArrowP2);
painter->drawConvexPolygon(QPolygonF() << line.p2() << destArrowP1 << destArrowP2);
}