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// Copyright (C) 2017 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include <QGuiApplication>
#include <QAnimationDriver>
#include <QPropertyAnimation>
#include <QQmlComponent>
#include <QQmlEngine>
#include <Qt3DCore/QEntity>
#include <Qt3DCore/QAspectEngine>
#include <Qt3DCore/QTransform>
#include <Qt3DRender/QCamera>
#include <Qt3DInput/QInputAspect>
#include <Qt3DRender/QRenderAspect>
#include <Qt3DRender/QEffect>
#include <Qt3DRender/QMaterial>
#include <Qt3DExtras/QForwardRenderer>
#include <Qt3DQuickScene2D/QScene2D>
#include <Qt3DExtras/QPlaneMesh>
#include <Qt3DRender/QTextureWrapMode>
#include <Qt3DRender/QClearBuffers>
#include <Qt3DRender/QTexture>
#include <Qt3DRender/QGeometryRenderer>
#include "qt3dwindow.h"
#include "qfirstpersoncameracontroller.h"
#include "planematerial.h"
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
Qt3DExtras::Qt3DWindow view;
// Scene Root
Qt3DCore::QEntity *sceneRoot = new Qt3DCore::QEntity();
// Scene Camera
Qt3DRender::QCamera *basicCamera = view.camera();
basicCamera->setProjectionType(Qt3DRender::QCameraLens::PerspectiveProjection);
basicCamera->setAspectRatio(view.width() / view.height());
basicCamera->setUpVector(QVector3D(0.0f, 1.0f, 0.0f));
basicCamera->setPosition(QVector3D(0.0f, 0.0f, 6.0f));
basicCamera->setViewCenter(QVector3D(0.0f, 0.0f, 0.0f));
basicCamera->setNearPlane(0.1f);
basicCamera->setFarPlane(1000.0f);
basicCamera->setFieldOfView(45.0f);
// For camera controls
Qt3DExtras::QFirstPersonCameraController *camController = new Qt3DExtras::QFirstPersonCameraController(sceneRoot);
camController->setCamera(basicCamera);
Qt3DRender::QFrameGraphNode* frameGraphNode = view.activeFrameGraph();
while (frameGraphNode->childNodes().size() > 0)
frameGraphNode = (Qt3DRender::QFrameGraphNode*)frameGraphNode->childNodes().at(0);
view.defaultFrameGraph()->setClearColor(QColor::fromRgbF(1.0f, 1.0f, 1.0f));
Qt3DRender::Quick::QScene2D *qmlTextureRenderer = new Qt3DRender::Quick::QScene2D(frameGraphNode);
Qt3DRender::QTexture2D* offscreenTexture = new Qt3DRender::QTexture2D(qmlTextureRenderer);
offscreenTexture->setSize(1024, 1024);
offscreenTexture->setFormat(Qt3DRender::QAbstractTexture::RGBA8_UNorm);
offscreenTexture->setGenerateMipMaps(true);
offscreenTexture->setMagnificationFilter(Qt3DRender::QAbstractTexture::Linear);
offscreenTexture->setMinificationFilter(Qt3DRender::QAbstractTexture::Linear);
offscreenTexture->setWrapMode(Qt3DRender::QTextureWrapMode(Qt3DRender::QTextureWrapMode::ClampToEdge, offscreenTexture));
Qt3DRender::QRenderTargetOutput *output = new Qt3DRender::QRenderTargetOutput(qmlTextureRenderer);
output->setAttachmentPoint(Qt3DRender::QRenderTargetOutput::Color0);
output->setTexture(offscreenTexture);
qmlTextureRenderer->setOutput(output);
QQmlEngine engine;
QQmlComponent component(&engine, QUrl(QStringLiteral("qrc:/OffscreenGui.qml")));
qmlTextureRenderer->setItem(static_cast<QQuickItem *>(component.create()));
Qt3DCore::QEntity* planeEntity = new Qt3DCore::QEntity(sceneRoot);
Qt3DExtras::QPlaneMesh* planeMesh = new Qt3DExtras::QPlaneMesh(planeEntity);
planeMesh->setWidth(4);
planeMesh->setHeight(4);
planeEntity->addComponent(planeMesh);
PlaneMaterial* material = new PlaneMaterial(offscreenTexture, planeEntity);
planeEntity->addComponent(material);
Qt3DCore::QTransform* transform = new Qt3DCore::QTransform(planeEntity);
transform->setRotation(QQuaternion::fromAxisAndAngle(1,0,0,90));
planeEntity->addComponent(transform);
view.setRootEntity(sceneRoot);
view.show();
return app.exec();
}
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