valentina/src/libs/vobj/vobjengine.cpp

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/************************************************************************
**
** @file vobjengine.cpp
** @author Roman Telezhynskyi <dismine(at)gmail.com>
** @date 12 12, 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) 2014 Valentina project
** <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 "vobjengine.h"
#include <QTextStream>
#include <QDebug>
#include <QtMath>
//---------------------------------------------------------------------------------------------------------------------
static inline QPaintEngine::PaintEngineFeatures svgEngineFeatures()
{
return QPaintEngine::PaintEngineFeatures(
QPaintEngine::AllFeatures
& ~QPaintEngine::PatternBrush
& ~QPaintEngine::PerspectiveTransform
& ~QPaintEngine::ConicalGradientFill
& ~QPaintEngine::PorterDuff);
}
//---------------------------------------------------------------------------------------------------------------------
VObjEngine::VObjEngine()
:QPaintEngine(svgEngineFeatures()), stream(nullptr), globalPointsCount(0), outputDevice(nullptr), planeCount(0),
size(), resolution(96), matrix()
{
for(int i=0; i < MAX_POINTS; i++)
{
points[i].x = 0;
points[i].y = 0;
}
}
//---------------------------------------------------------------------------------------------------------------------
VObjEngine::~VObjEngine()
{
outputDevice = nullptr;
}
//---------------------------------------------------------------------------------------------------------------------
bool VObjEngine::begin(QPaintDevice *pdev)
{
Q_UNUSED(pdev)
if (outputDevice == nullptr)
{
qWarning("VObjEngine::begin(), no output device");
return false;
}
if (outputDevice->isOpen() == false)
{
if (outputDevice->open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Truncate) == false)
{
qWarning("VObjEngine::begin(), could not open output device: '%s'",
qPrintable(outputDevice->errorString()));
return false;
}
}
else if (outputDevice->isWritable() == false)
{
qWarning("VObjEngine::begin(), could not write to read-only output device: '%s'",
qPrintable(outputDevice->errorString()));
return false;
}
if (size.isValid() == false)
{
qWarning()<<"VObjEngine::begin(), size is not valid";
return false;
}
stream = new QTextStream(outputDevice);
*stream << "# Valentina OBJ File" << endl;
*stream << "# www.valentina-project.org/" << endl;
return true;
}
//---------------------------------------------------------------------------------------------------------------------
bool VObjEngine::end()
{
delete stream;
return true;
}
//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::updateState(const QPaintEngineState &state)
{
QPaintEngine::DirtyFlags flags = state.state();
// always stream full gstate, which is not required, but...
flags |= QPaintEngine::AllDirty;
if (flags & QPaintEngine::DirtyTransform)
{
matrix = state.matrix(); // Save new matrix for moving paths
}
}
//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::drawPath(const QPainterPath &path)
{
QPolygonF polygon = path.toFillPolygon(matrix);
polygon = MakePointsUnique(polygon);// Points must be unique
if (polygon.size() < 3)
{
return;
}
qint64 sq = Square(polygon);
++planeCount;
*stream << "o Plane." << QString("%1").arg(planeCount, 3, 10, QLatin1Char('0')) << endl;
unsigned int num_points = 0;
for(int i=0; i < polygon.count(); i++)
{
if( num_points < MAX_POINTS )
{
points[num_points].x = polygon.at(i).x();
points[num_points].y = polygon.at(i).y();
num_points++;
}
}
int offset = 0;
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delaunay2d_t *res = delaunay2d_from(points, num_points);//Calculate faces
QPointF pf[MAX_POINTS];
bool skipFace=false;//Need skip first face
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for(unsigned int i = 0; i < res->num_faces; i++ )
{
if (offset == 0)
{
skipFace=true;
}
else
{
skipFace=false;
}
int num_verts = res->faces[offset];
offset++;
for( int j = 0; j < num_verts; j++ )
{
int p0 = res->faces[offset + j];
pf[j] = QPointF(points[p0].x, points[p0].y);
}
if (skipFace == false )
{
QPolygonF face;
for( int i = 0; i < num_verts; i++ )
{
face << QPointF(pf[i]);
}
QPolygonF united = polygon.united(face);
qint64 sqUnited = Square(united);
if(sqUnited <= sq)
{// This face incide our base polygon.
drawPolygon(pf, num_verts, QPaintEngine::OddEvenMode);
}
}
offset += num_verts;
}
delaunay2d_release(res);//Don't forget release data
*stream << "s off" << endl;
}
//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode)
{
Q_UNUSED(mode)
drawPoints(points, pointCount);
*stream << "f";
for (int i = 0; i < pointCount; ++i)
{
*stream << QString(" %1").arg(globalPointsCount - pointCount + i + 1);
}
*stream << endl;
}
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void VObjEngine::drawPolygon(const QPoint *points, int pointCount, QPaintEngine::PolygonDrawMode mode)
{
QPaintEngine::drawPolygon(points, pointCount, mode);
}
//---------------------------------------------------------------------------------------------------------------------
QPaintEngine::Type VObjEngine::type() const
{
return QPaintEngine::User;
}
//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::drawPoints(const QPointF *points, int pointCount)
{
for (int i = 0; i < pointCount; ++i)
{
qreal x = ((points[i].x() - 0)/qFloor(size.width()/2.0)) - 1.0;
qreal y = (((points[i].y() - 0)/qFloor(size.width()/2.0)) - 1.0)*-1;
*stream << "v" << " " << QString::number(x, 'f', 6 ) << " " << QString::number(y, 'f', 6 ) << " "
<< "0.000000" << endl;
++globalPointsCount;
}
}
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//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::drawPoints(const QPoint *points, int pointCount)
{
QPaintEngine::drawPoints(points, pointCount);
}
//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr)
{
Q_UNUSED(r)
Q_UNUSED(pm)
Q_UNUSED(sr)
}
//---------------------------------------------------------------------------------------------------------------------
QSize VObjEngine::getSize() const
{
return size;
}
//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::setSize(const QSize &value)
{
Q_ASSERT(!isActive());
size = value;
}
//---------------------------------------------------------------------------------------------------------------------
QIODevice *VObjEngine::getOutputDevice() const
{
return outputDevice;
}
//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::setOutputDevice(QIODevice *value)
{
Q_ASSERT(!isActive());
outputDevice = value;
}
//---------------------------------------------------------------------------------------------------------------------
int VObjEngine::getResolution() const
{
return resolution;
}
//---------------------------------------------------------------------------------------------------------------------
void VObjEngine::setResolution(int value)
{
Q_ASSERT(!isActive());
resolution = value;
}
//---------------------------------------------------------------------------------------------------------------------
QPolygonF VObjEngine::MakePointsUnique(const QPolygonF &polygon) const
{
QVector<QPointF> set;
QPolygonF uniquePolygon;
for(int i=0; i < polygon.count(); i++)
{
if (set.contains(polygon.at(i)) == false)
{
set.append(polygon.at(i));
uniquePolygon.append(polygon.at(i));
}
}
return uniquePolygon;
}
//---------------------------------------------------------------------------------------------------------------------
qint64 VObjEngine::Square(const QPolygonF &poly) const
{
QVector<qreal> x;
QVector<qreal> y;
int n = poly.count();
qreal s, res = 0;
qint64 sq = 0;
for(int i=0; i < n; i++)
{
x.append(poly.at(i).x());
y.append(poly.at(i).y());
}
// Calculation a polygon area through the sum of the areas of trapezoids
for (int i = 0; i < n; i++)
{
if (i == 0)
{
s = x.at(i)*(y.at(n-1) - y.at(i+1)); //if i == 0, then y[i-1] replace on y[n-1]
res += s;
}
else
{
if (i == n-1)
{
s = x.at(i)*(y.at(i-1) - y.at(0)); // if i == n-1, then y[i+1] replace on y[0]
res += s;
}
else
{
s = x.at(i)*(y.at(i-1) - y.at(i+1));
res += s;
}
}
}
sq = qFloor(qAbs(res/2.0));
return sq;
}