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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtQuick3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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 1.1, 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "line.h"
#include "qglbuilder.h"
/*!
\qmlclass Line Line
\brief The Line item represents a geometric line drawn in 3D space.
\since 4.8
\ingroup qt3d::qml3d::shapes
\inherits Item3D
The Line element in QML provides a means of drawing lines in a 3D
environment. For example, the following QML code draws a line between
point (0,0,0), (1,1,1), then to (-1,-1,-1).
\code
Line {
vertices: [
0, 0, 0,
0, 0, 1,
0, 1, 1
]
effect: Effect {
color: "#aaca00"
}
}
\endcode
The Line element is part of the \c{Qt3D.Shapes} namespace,
so the following must appear at the top of any QML file that
references it:
\code
import Qt3D.Shapes 1.0
\endcode
\sa Item3D
*/
/*!
\internal
*/
Line::Line(QObject *parent) :
QDeclarativeItem3D(parent)
,m_width(3.0)
,m_geometry(0)
,m_changeFlag(false)
{
//meh
}
/*!
\qmlproperty list<real> Line::vertices
This property defines the positions for all of the vertices in the
line strip. Each vertex is given by three real values, defining
the x, y, and z co-ordinates of the vertex.
*/
QVariant Line::vertices() const
{
return m_vertices;
}
void Line::setVertices(const QVariant &value)
{
m_vertices = value;
//Update the actual QVector3DArray containing the line points.
m_vertexArray.clear();
QVariantList vertlist = m_vertices.toList();
for (int index = 0; (index + 2) < vertlist.size(); index += 3) {
m_vertexArray.append(qreal(vertlist.at(index).toDouble()), qreal(vertlist.at(index + 1).toDouble()), qreal(vertlist.at(index + 2).toDouble()));
}
m_changeFlag=true;
emit verticesChanged();
update();
}
/*!
\qmlproperty real Line::width
This property defines the width of the line. The
default is 1.0
*/
void Line::setWidth(qreal width)
{
if (m_width != width) {
m_width = width;
m_changeFlag=true;
emit widthChanged();
update();
}
}
/*!
\internal
*/
void Line::drawItem(QGLPainter *painter)
{
if (m_changeFlag || !m_geometry) {
if (m_geometry) delete m_geometry;
QGeometryData lineCollection;
lineCollection.appendVertexArray(m_vertexArray);
QGLBuilder builder;
builder.newSection();
builder.addTriangles(lineCollection);
builder.currentNode()->setDrawingMode(QGL::LineStrip);
builder.currentNode()->setDrawingWidth(m_width);
m_geometry = builder.finalizedSceneNode();
m_changeFlag = false;
}
// Draw the geometry.
m_geometry->draw(painter);
}
QT_END_NAMESPACE
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