valentina/src/app/geometry/vabstractcurve.cpp

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2014-06-25 16:08:12 +02:00
/************************************************************************
**
** @file vabstractcurve.cpp
** @author Roman Telezhynskyi <dismine(at)gmail.com>
** @date 25 6, 2014
**
** @brief
** @copyright
** This source code is part of the Valentine project, a pattern making
** program, whose allow create and modeling patterns of clothing.
** Copyright (C) 2013-2015 Valentina project
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** <https://bitbucket.org/dismine/valentina> All Rights Reserved.
**
** Valentina is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** Valentina is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with Valentina. If not, see <http://www.gnu.org/licenses/>.
**
*************************************************************************/
#include "vabstractcurve.h"
#include <QPainterPath>
#include <QDebug>
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VAbstractCurve::VAbstractCurve(const GOType &type, const quint32 &idObject, const Draw &mode)
:VGObject(type, idObject, mode)
{}
//---------------------------------------------------------------------------------------------------------------------
VAbstractCurve::VAbstractCurve(const VAbstractCurve &curve)
:VGObject(curve)
{}
//---------------------------------------------------------------------------------------------------------------------
VAbstractCurve &VAbstractCurve::operator=(const VAbstractCurve &curve)
{
if ( &curve == this )
{
return *this;
}
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VGObject::operator=(curve);
return *this;
}
//---------------------------------------------------------------------------------------------------------------------
QVector<QPointF> VAbstractCurve::GetSegmentPoints(const QPointF &begin, const QPointF &end, bool reverse) const
{
QVector<QPointF> points = GetPoints();
if (reverse)
{
points = GetReversePoints(points);
}
points = FromBegin(points, begin);
points = ToEnd(points, end);
return points;
}
//---------------------------------------------------------------------------------------------------------------------
QVector<QPointF> VAbstractCurve::FromBegin(const QVector<QPointF> &points, const QPointF &begin)
{
if (points.count() >= 2)
{
QVector<QPointF> segment;
bool theBegin = false;
for (qint32 i = 0; i < points.count()-1; ++i)
{
if (theBegin == false)
{
if (PointInSegment(begin, points.at(i), points.at(i+1)))
{
theBegin = true;
segment.append(begin);
if (i == points.count()-2)
{
segment.append(points.at(i+1));
}
continue;
}
}
else
{
segment.append(points.at(i));
if (i == points.count()-2)
{
segment.append(points.at(i+1));
}
}
}
if (segment.isEmpty())
{
return points;
}
else
{
return segment;
}
}
else
{
return points;
}
return points;
}
//---------------------------------------------------------------------------------------------------------------------
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QVector<QPointF> VAbstractCurve::ToEnd(const QVector<QPointF> &points, const QPointF &end)
{
QVector<QPointF> reversed = GetReversePoints(points);
reversed = FromBegin(reversed, end);
return GetReversePoints(reversed);
}
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//---------------------------------------------------------------------------------------------------------------------
QPainterPath VAbstractCurve::GetPath(PathDirection direction) const
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{
QPainterPath path;
QVector<QPointF> points = GetPoints();
if (points.count() >= 2)
{
for (qint32 i = 0; i < points.count()-1; ++i)
{
path.moveTo(points.at(i));
path.lineTo(points.at(i+1));
}
if (direction == PathDirection::Show && points.count() >= 3)
{
path.addPath(ShowDirection(points));
}
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}
else
{
qDebug()<<"points.count() < 2"<<Q_FUNC_INFO;
}
return path;
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief IntersectLine return list of points for real intersection with line
* @param line line that intersect with curve
* @return list of intersection points
*/
QVector<QPointF> VAbstractCurve::IntersectLine(const QLineF &line) const
{
QVector<QPointF> points = this->GetPoints();
QVector<QPointF> intersections;
for ( qint32 i = 0; i < points.count()-1; ++i )
{
QPointF crosPoint;
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QLineF::IntersectType type = line.intersect(QLineF ( points.at(i), points.at(i+1)), &crosPoint);
if ( type == QLineF::BoundedIntersection )
{
intersections.append(crosPoint);
}
}
return intersections;
}
//---------------------------------------------------------------------------------------------------------------------
QPainterPath VAbstractCurve::ShowDirection(const QVector<QPointF> &points) const
{
QPainterPath path;
if (points.count() >= 2)
{
/*Need find coordinate midle of curve.
Universal way is take all points and find sum.*/
const qreal seek_length = GetLength()/2.0;
qreal found_length = 0;
QLineF arrow;
for (qint32 i = 1; i <= points.size()-1; ++i)
{
arrow = QLineF(points.at(i-1), points.at(i));
found_length += arrow.length();//Length that we aready find
if (seek_length <= found_length)// if have found more that need stop.
{
//subtract length in last line and you will find position of the middle point.
arrow.setLength(arrow.length() - (found_length - seek_length));
break;
}
}
//Reverse line because we want start arrow from this point
arrow = QLineF(arrow.p2(), arrow.p1());
const qreal angle = arrow.angle();//we each time change line angle, better save original angle value
arrow.setLength(14);//arrow length in pixels
arrow.setAngle(angle-35);
path.moveTo(arrow.p1());
path.lineTo(arrow.p2());
arrow.setAngle(angle+35);
path.moveTo(arrow.p1());
path.lineTo(arrow.p2());
}
return path;
}