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/****************************************************************************
**
** Copyright (C) 2017 Juan José Casafranca.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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 The Qt Company Ltd 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/

import QtQuick 2.2 as QQ2
import Qt3D.Core 2.9
import Qt3D.Render 2.9
import Qt3D.Input 2.0
import Qt3D.Extras 2.0

Entity {
    id: sceneRoot

    Camera {
        id: sceneCamera
        projectionType: CameraLens.PerspectiveProjection
        upVector: Qt.vector3d(0, 1, 0)
        position: Qt.vector3d(0, 0, -800)
        viewCenter: Qt.vector3d(0, 0, 0)
        nearPlane: 0.1
        farPlane: 1000
        fieldOfView: 25
        aspectRatio: 1.33
    }

    components: [
        RenderSettings {
            ComputeFrameGraph {
            }
            // explicitly set RenderingPolicy to AlwaysRender, as changes in the
            // scene won't be reflected in actual Qt scene-graph changes (due to
            // GPU compute calls)
            renderPolicy: RenderSettings.Always
        }
    ]

    function initGraphBuffer() {
        var bufferData = new Uint32Array(1024);
        for (var i = 0; i < 1024; ++i) {
            bufferData[i] = 1;
        }
        return bufferData
    }


    Buffer {
        id: graphBuffer
        objectName: "buffer"
        accessType: Buffer.ReadWrite
        data: initGraphBuffer()
    }

    ComputeMaterial {
        id: computeMaterial
        dataBuffer: graphBuffer
        inputSize: 1024
    }

    Entity {
        id: particleComputeEntity
        readonly property ComputeCommand particlesComputeJob: ComputeCommand {}
        components: [
            particlesComputeJob,
            computeMaterial
        ]
    }
}