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/****************************************************************************
**
** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Graphics Dojo project on Trolltech Labs.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 or 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 GNU
** General Public Licensing requirements will be met:
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include "modelitem.h"
#include "model.h"
#include <QtGui>
#include <QtOpenGL>
#include "mazescene.h"
#ifndef GL_MULTISAMPLE
#define GL_MULTISAMPLE 0x809D
#endif
void ModelItem::updateTransform(const Camera &camera, qreal time)
{
ProjectedItem::updateTransform(camera, time);
setTransform(QTransform());
m_matrix = Matrix4x4::fromTranslation(3, 0, 7) * camera.matrix(time);
}
QRectF ModelItem::boundingRect() const
{
if (!scene()->views().isEmpty()) {
QGraphicsView *view = scene()->views().at(0);
return view->mapToScene(view->rect()).boundingRect();
}
return scene()->sceneRect();
}
void ModelItem::updateItem()
{
ProjectedItem::update();
}
void ModelItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
{
if (!m_model)
return;
Matrix4x4 projectionMatrix = Matrix4x4::fromProjection(70);
projectionMatrix *= Matrix4x4::fromQTransform(painter->transform());
Matrix4x4 modelMatrix;
const int delta = m_time.elapsed() - m_lastTime;
m_rotation += m_angularMomentum * (delta / 1000.0);
m_lastTime += delta;
Point3d size = m_model->size();
float extent = qSqrt(2.0);
float scale = 1 / qMax(size.y, qMax(size.x / extent, size.z / extent));
modelMatrix *= Matrix4x4::fromScale(scale, -scale, scale);
modelMatrix *= Matrix4x4::fromRotation(m_rotation.z, Qt::ZAxis);
modelMatrix *= Matrix4x4::fromRotation(m_rotation.y, Qt::YAxis);
modelMatrix *= Matrix4x4::fromRotation(m_rotation.x, Qt::XAxis);
QTimer::singleShot(10, this, SLOT(updateItem()));
if (painter->paintEngine()->type() != QPaintEngine::OpenGL) {
m_wireframe->setEnabled(false);
m_wireframe->setChecked(false);
m_wireframeEnabled = false;
painter->setTransform(QTransform());
painter->setPen(m_modelColor);
m_model->render(painter, modelMatrix * m_matrix * projectionMatrix, m_normalsEnabled);
return;
}
m_wireframe->setEnabled(true);
glClearDepth(0);
glClear(GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, painter->device()->width(), painter->device()->height(), 0, -1, 1);
glMultMatrixf(projectionMatrix.data());
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadMatrixf(m_matrix.data());
const float ambient[] = { 0.1, 0.1, 0.1, 1 };
const float pos[] = { 50, -500, 200 };
glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glMultMatrixf(modelMatrix.data());
glColor4f(m_modelColor.redF(), m_modelColor.greenF(), m_modelColor.blueF(), 1.0f);
glEnable(GL_MULTISAMPLE);
m_model->render(m_wireframeEnabled, m_normalsEnabled);
glDisable(GL_MULTISAMPLE);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
}
ModelItem::ModelItem()
: ProjectedItem(QRectF(), false)
, m_wireframeEnabled(false)
, m_normalsEnabled(false)
, m_modelColor(153, 255, 0)
, m_model(0)
, m_lastTime(0)
, m_distance(1.4f)
, m_angularMomentum(0, 40, 0)
{
QPointF pos(3, 7);
setPosition(pos, pos);
setLayout(new QVBoxLayout);
m_modelButton = new QPushButton(tr("Load model"));
connect(m_modelButton, SIGNAL(clicked()), this, SLOT(loadModel()));
#ifndef QT_NO_CONCURRENT
connect(&m_modelLoader, SIGNAL(finished()), this, SLOT(modelLoaded()));
#endif
layout()->addWidget(m_modelButton);
m_wireframe = new QCheckBox(tr("Render as wireframe"));
connect(m_wireframe, SIGNAL(toggled(bool)), this, SLOT(enableWireframe(bool)));
layout()->addWidget(m_wireframe);
QCheckBox *normals = new QCheckBox(tr("Display normals vectors"));
connect(normals, SIGNAL(toggled(bool)), this, SLOT(enableNormals(bool)));
layout()->addWidget(normals);
QPushButton *colorButton = new QPushButton(tr("Choose model color"));
connect(colorButton, SIGNAL(clicked()), this, SLOT(setModelColor()));
layout()->addWidget(colorButton);
loadModel(QLatin1String("qt.obj"));
m_time.start();
}
static Model *loadModel(const QString &filePath)
{
return new Model(filePath);
}
void ModelItem::loadModel()
{
loadModel(QFileDialog::getOpenFileName(0, tr("Choose model"), QString(), QLatin1String("*.obj")));
}
void ModelItem::loadModel(const QString &filePath)
{
if (filePath.isEmpty())
return;
m_modelButton->setEnabled(false);
QApplication::setOverrideCursor(Qt::BusyCursor);
#ifndef QT_NO_CONCURRENT
m_modelLoader.setFuture(QtConcurrent::run(::loadModel, filePath));
#else
setModel(::loadModel(filePath));
modelLoaded();
#endif
}
void ModelItem::modelLoaded()
{
#ifndef QT_NO_CONCURRENT
setModel(m_modelLoader.result());
#endif
m_modelButton->setEnabled(true);
QApplication::restoreOverrideCursor();
}
void ModelItem::setModel(Model *model)
{
delete m_model;
m_model = model;
ProjectedItem::update();
}
void ModelItem::enableWireframe(bool enabled)
{
m_wireframeEnabled = enabled;
ProjectedItem::update();
}
void ModelItem::enableNormals(bool enabled)
{
m_normalsEnabled = enabled;
ProjectedItem::update();
}
void ModelItem::setModelColor()
{
const QColor color = QColorDialog::getColor(m_modelColor);
if (color.isValid()) {
m_modelColor = color;
ProjectedItem::update();
}
}
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