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#include <QtGui>
#include <QtOpenGL>
#include <QFuture>
#include <QFutureWatcher>
#include "model.h"
class GraphicsScene : public QGraphicsScene
{
Q_OBJECT
public:
GraphicsScene();
void drawBackground(QPainter *painter, const QRectF &rect);
public slots:
void setModel(Model *model);
void enableAutoRotate(bool enabled);
void enableWireframe(bool enabled);
void enableNormals(bool enabled);
void setLightPosition(int pos);
void setColor(QRgb color);
private:
bool m_wireframeEnabled;
bool m_normalsEnabled;
bool m_autoRotate;
float m_angle;
float m_lightPos;
QRgb m_color;
Model *m_model;
};
class Controls : public QGroupBox
{
Q_OBJECT
public:
Controls(GraphicsScene *scene);
private slots:
void loadModel(const QString &model);
void modelLoaded();
void setColor(bool showDialog = true);
private:
GraphicsScene *m_scene;
QFutureWatcher<Model *> m_modelLoader;
QComboBox *m_models;
QRgb m_color;
};
Controls::Controls(GraphicsScene *scene)
: m_scene(scene)
, m_models(new QComboBox)
, m_color(qRgb(180, 100, 255))
{
QVBoxLayout *layout = new QVBoxLayout(this);
layout->addWidget(new QLabel("Model:"));
QDir dir("models");
dir.setNameFilters(QStringList() << "*.obj");
m_models->addItems(dir.entryList());
connect(m_models, SIGNAL(currentIndexChanged(const QString &)), this, SLOT(loadModel(const QString &)));
connect(&m_modelLoader, SIGNAL(finished()), this, SLOT(modelLoaded()));
if (m_models->count() > 0)
loadModel(m_models->currentText());
layout->addWidget(m_models);
QCheckBox *autoRotate = new QCheckBox("Auto-rotate");
autoRotate->setChecked(true);
connect(autoRotate, SIGNAL(toggled(bool)), m_scene, SLOT(enableAutoRotate(bool)));
layout->addWidget(autoRotate);
QCheckBox *wireframe = new QCheckBox("Render as wireframe");
wireframe->setChecked(true);
connect(wireframe, SIGNAL(toggled(bool)), m_scene, SLOT(enableWireframe(bool)));
layout->addWidget(wireframe);
QCheckBox *normals = new QCheckBox("Display normals vectors");
wireframe->setChecked(false);
connect(normals, SIGNAL(toggled(bool)), m_scene, SLOT(enableNormals(bool)));
layout->addWidget(normals);
layout->addWidget(new QLabel("Light position:"));
QSlider *lightPosition = new QSlider(Qt::Horizontal);
lightPosition->setRange(-1000, 1000);
connect(lightPosition, SIGNAL(valueChanged(int)), m_scene, SLOT(setLightPosition(int)));
layout->addWidget(lightPosition);
m_scene->setLightPosition(lightPosition->value());
QPushButton *colorButton = new QPushButton("Set model color");
connect(colorButton, SIGNAL(pressed()), this, SLOT(setColor()));
layout->addWidget(colorButton);
setColor(false);
}
Model *loadModel(const QString &filename)
{
return new Model(QString("models/") + filename);
}
void Controls::loadModel(const QString &filename)
{
m_modelLoader.setFuture(QtConcurrent::run(::loadModel, filename));
m_models->setEnabled(false);
QApplication::setOverrideCursor(Qt::BusyCursor);
}
void Controls::modelLoaded()
{
m_scene->setModel(m_modelLoader.result());
m_models->setEnabled(true);
QApplication::restoreOverrideCursor();
}
void Controls::setColor(bool showDialog)
{
if (showDialog)
m_color = QColorDialog::getRgba(m_color);
m_scene->setColor(m_color);
}
GraphicsScene::GraphicsScene()
: m_wireframeEnabled(true)
, m_normalsEnabled(false)
, m_autoRotate(true)
, m_angle(0)
, m_model(0)
{
Controls *controls = new Controls(this);
controls->setWindowOpacity(0.8);
addWidget(controls)->translate(10, 10);
setSceneRect(QRect(0, 0, 1024, 768));
}
void GraphicsScene::drawBackground(QPainter *painter, const QRectF &)
{
painter->save();
glClearColor(1, 1, 1, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
bool useMultisample = static_cast<QGLWidget *>(painter->device())->format().sampleBuffers();
if (m_model) {
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
gluPerspective(70, painter->device()->width() / float(painter->device()->height()), 0.01, 1000);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
float pos[] = { m_lightPos, 5, 2, 0 };
glLightfv(GL_LIGHT0, GL_POSITION, pos);
glColor4f(qRed(m_color)/255.0f, qGreen(m_color)/255.0f, qBlue(m_color)/255.0f, 1.0f);
if (useMultisample)
glEnable(GL_MULTISAMPLE);
glTranslatef(0, 0, -1.5);
glRotatef(m_angle, 0.5, 1, 0.1);
if (m_autoRotate)
m_angle += 0.4;
m_model->render(m_wireframeEnabled, m_normalsEnabled);
if (useMultisample)
glDisable(GL_MULTISAMPLE);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
}
painter->restore();
QTimer::singleShot(20, this, SLOT(update()));
}
void GraphicsScene::setModel(Model *model)
{
delete m_model;
m_model = model;
update();
}
void GraphicsScene::enableAutoRotate(bool enabled)
{
m_autoRotate = enabled;
update();
}
void GraphicsScene::enableWireframe(bool enabled)
{
m_wireframeEnabled = enabled;
}
void GraphicsScene::enableNormals(bool enabled)
{
m_normalsEnabled = enabled;
}
void GraphicsScene::setLightPosition(int pos)
{
m_lightPos = pos * 0.005;
update();
}
void GraphicsScene::setColor(QRgb color)
{
m_color = color;
update();
}
int main(int argc, char **argv)
{
QApplication app(argc, argv);
QGraphicsView view;
view.setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
view.setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
view.setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
view.setTransformationAnchor(QGraphicsView::NoAnchor);
view.setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
view.setScene(new GraphicsScene);
view.show();
return app.exec();
}
#include "main.moc"
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