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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the Qt3D examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "tankview.h"
#include "tank.h"
#include "quadplane.h"
#include "qglscenenode.h"
#include "qray3d.h"
#include "qplane3d.h"
#include <QMouseEvent>
TankView::TankView(QWindow *parent)
: QGLView(parent)
, m_tankScene(new QGLSceneNode)
, m_count(0)
{
m_tankScene->setParent(this);
m_tankScene->setPalette(new QGLMaterialCollection(this));
m_tankScene->setEffect(QGL::LitDecalTexture2D);
m_tankScene->addNode(new QuadPlane(0, QSizeF(25, 25)));
Tank *tank = addTank();
connect(tank, SIGNAL(updated()), this, SLOT(update()));
// TODO: setToolTip not implemented in QWindow
// setToolTip(tr("Double-click to add more tanks"));
setWindowTitle(tr("Double-click Me!"));
}
TankView::~TankView()
{
}
Tank *TankView::addTank()
{
Tank *tank = new Tank(m_tankScene);
tank->setObjectName(QString(QLatin1String("Tank %1")).arg(m_count));
++m_count;
connect(tank, SIGNAL(updated()), this, SLOT(update()));
return tank;
}
void TankView::paintGL(QGLPainter *painter)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_tankScene->draw(painter);
}
void TankView::initializeGL(QGLPainter *painter)
{
painter->setClearColor(Qt::gray);
camera()->setEye(camera()->eye() + QVector3D(0.0f, 4.0f, 0.0f));
glEnable(GL_BLEND);
}
void TankView::mouseDoubleClickEvent(QMouseEvent *e)
{
Tank *t = addTank();
QVector3D pick = mapPoint(e->pos());
// find the origin of the near plane
QRay3D eyeline(camera()->eye(), (camera()->center() - camera()->eye()).normalized());
QVector3D nearPlaneOrigin = eyeline.point(camera()->nearPlane());
// from the near plane origin move up and across by the pick's XY to find the point
// on the near plane
QRay3D up(nearPlaneOrigin, camera()->upVector());
QVector3D sideDir = QVector3D::crossProduct(camera()->upVector(), -eyeline.direction());
QRay3D side(up.point(pick.y()), sideDir.normalized());
QVector3D v = side.point(pick.x());
// intersect the ray thru the picked point on the near plane with the floor
QRay3D ray(camera()->eye(), v - camera()->eye());
QPlane3D floorPlane(QVector3D(), QVector3D(0, 1, 0));
QVector3D pointOnFloor = ray.point(floorPlane.intersection(ray));
t->setPosition(pointOnFloor);
}
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