Qt Quick 3D - Principled Material Example

 /****************************************************************************
 **
 ** Copyright (C) 2019 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples 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
 import QtQuick.Controls
 import QtQuick.Layouts

 Rectangle {
     property real metalness: metalness.sliderValue
     property real roughness: roughness.sliderValue
     property real specular: specular.sliderValue
     property real specularTint: specularTint.sliderValue
     property real opacityValue: opacityValue.sliderValue

     color: "#6b7080"
     width: parent.width
     height: 75

     Component {
         id: propertySlider
         RowLayout {
             Label {
                 id: propText
                 text: name
                 color: "#222840"
                 font.pointSize: 12
                 Layout.minimumWidth: 150
                 Layout.maximumWidth: 150
             }
             Slider {
                 id: slider
                 from: fromValue
                 to: toValue
                 value: sliderValue
                 stepSize: 0.01
                 onValueChanged: sliderValue = value
                 Layout.minimumWidth: 200
                 Layout.maximumWidth: 200
                 background: Rectangle {
                     x: slider.leftPadding
                     y: slider.topPadding + slider.availableHeight / 2 - height / 2
                     implicitWidth: 200
                     implicitHeight: 4
                     width: slider.availableWidth
                     height: implicitHeight
                     radius: 1
                     color: "#222840"

                     Rectangle {
                         width: slider.visualPosition * parent.width
                         height: parent.height
                         color: "#848895"
                         radius: 1
                     }
                 }
                 handle: Rectangle {
                     x: slider.leftPadding + slider.visualPosition * (slider.availableWidth - width)
                     y: slider.topPadding + slider.availableHeight / 2 - height / 2
                     implicitWidth: 20
                     implicitHeight: 20
                     radius: 5
                     color: slider.pressed ? "#222840" : "#6b7080"
                     border.color: "#848895"
                 }
             }
             Label {
                 id: valueText
                 text: slider.value.toFixed(2)
                 color: "#222840"
                 font.pointSize: 12
                 font.bold: true
                 Layout.minimumWidth: 40
                 Layout.maximumWidth: 40
             }
         }
     }

     ColumnLayout {
         anchors.horizontalCenter: parent.horizontalCenter
         RowLayout {
             spacing: 20
             Loader {
                 id: metalness
                 property real sliderValue: 1.0
                 property string name: "Metalness"
                 property real fromValue: 0.0
                 property real toValue: 1.0
                 sourceComponent:  propertySlider
             }
             Loader {
                 id: roughness
                 property real sliderValue: 0.2
                 property string name: "Roughness"
                 property real fromValue: 0.0
                 property real toValue: 1.0
                 sourceComponent:  propertySlider
             }
         }
         RowLayout {
             spacing: 20
             Loader {
                 id: specular
                 property real sliderValue: 0.5
                 property string name: "Specular Power"
                 property real fromValue: 0.0
                 property real toValue: 1.0
                 sourceComponent:  propertySlider
             }
             Loader {
                 id: specularTint
                 property real sliderValue: 0.0
                 property string name: "Specular Tint"
                 property real fromValue: 0.0
                 property real toValue: 1.0
                 sourceComponent: propertySlider
             }
             Loader {
                 id: opacityValue
                 property real sliderValue: 1.0
                 property string name: "Opacity"
                 property real fromValue: 0.0
                 property real toValue: 1.0
                 sourceComponent: propertySlider
             }
         }
     }
 }