/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
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** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later 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 2.0 requirements will be
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** $QT_END_LICENSE$
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****************************************************************************/

#include <QGuiApplication>

#include <Qt3DCore/QEntity>
#include <Qt3DCore/QCamera>
#include <Qt3DCore/QCameraLens>
#include <Qt3DCore/QTransform>
#include <Qt3DCore/QAspectEngine>

#include <Qt3DInput/QInputAspect>

#include <Qt3DRender/QRenderAspect>
#include <Qt3DRender/QFrameGraph>
#include <Qt3DRender/QForwardRenderer>
#include <Qt3DRender/QPhongMaterial>
#include <Qt3DRender/QCylinderMesh>
#include <Qt3DRender/QSphereMesh>
#include <Qt3DRender/QTorusMesh>

#include <QPropertyAnimation>

#include "qt3dwindow.h"
#include "orbittransformcontroller.h"

Qt3DCore::QEntity *createScene()
{
    // Root entity
    Qt3DCore::QEntity *rootEntity = new Qt3DCore::QEntity;

    // Material
    Qt3DRender::QMaterial *material = new Qt3DRender::QPhongMaterial(rootEntity);

    // Torus
    Qt3DCore::QEntity *torusEntity = new Qt3DCore::QEntity(rootEntity);
    Qt3DRender::QTorusMesh *torusMesh = new Qt3DRender::QTorusMesh;
    torusMesh->setRadius(5);
    torusMesh->setMinorRadius(1);
    torusMesh->setRings(100);
    torusMesh->setSlices(20);

    Qt3DCore::QTransform *torusTransform = new Qt3DCore::QTransform;
    torusTransform->setScale3D(QVector3D(1.5, 1, 0.5));
    torusTransform->setRotation(QQuaternion::fromAxisAndAngle(QVector3D(1, 0, 0), 45.0f));

    torusEntity->addComponent(torusMesh);
    torusEntity->addComponent(torusTransform);
    torusEntity->addComponent(material);

    // Sphere
    Qt3DCore::QEntity *sphereEntity = new Qt3DCore::QEntity(rootEntity);
    Qt3DRender::QSphereMesh *sphereMesh = new Qt3DRender::QSphereMesh;
    sphereMesh->setRadius(3);

    Qt3DCore::QTransform *sphereTransform = new Qt3DCore::QTransform;
    OrbitTransformController *controller = new OrbitTransformController(sphereTransform);
    controller->setTarget(sphereTransform);
    controller->setRadius(20.0f);

    QPropertyAnimation *sphereRotateTransformAnimation = new QPropertyAnimation(sphereTransform);
    sphereRotateTransformAnimation->setTargetObject(controller);
    sphereRotateTransformAnimation->setPropertyName("angle");
    sphereRotateTransformAnimation->setStartValue(QVariant::fromValue(0));
    sphereRotateTransformAnimation->setEndValue(QVariant::fromValue(360));
    sphereRotateTransformAnimation->setDuration(10000);
    sphereRotateTransformAnimation->setLoopCount(-1);
    sphereRotateTransformAnimation->start();

    sphereEntity->addComponent(sphereMesh);
    sphereEntity->addComponent(sphereTransform);
    sphereEntity->addComponent(material);

    return rootEntity;
}

int main(int argc, char* argv[])
{
    QGuiApplication app(argc, argv);
    Qt3DWindow view;

    // Camera
    Qt3DCore::QCamera *camera = view.camera();
    camera->lens()->setPerspectiveProjection(45.0f, 16.0f/9.0f, 0.1f, 1000.0f);
    camera->setPosition(QVector3D(0, 0, 40.0f));

    Qt3DCore::QEntity *scene = createScene();
    view.setRootEntity(scene);
    view.show();

    return app.exec();
}