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+/****************************************************************************
+**
+** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt3D module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** 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.
+**
+** GNU General Public License Usage
+** 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
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import Qt3D 2.0
+import Qt3D.Render 2.0
+
+Entity {
+ id: root
+ property real convergence: 2000.0
+ property real eyeSeparation: 35.0
+ property real aspectRatio: _window.width / _window.height
+ property real fieldOfView: 60.0
+ property real nearPlane: 10.0
+ property real farPlane: 10000.0
+
+ property alias viewCenter: eyeLookAt.viewCenter
+ property alias position: eyeLookAt.position
+
+ readonly property real _fov2: Math.tan(fieldOfView * Math.PI / 180 * 0.5)
+ readonly property real top: nearPlane * _fov2
+ readonly property real a: aspectRatio * _fov2 * convergence
+
+ CameraLens {
+ id: leftEyeLens
+ projectionType: CameraLens.FrustumProjection
+ nearPlane : root.nearPlane
+ farPlane : root.farPlane
+ left: -(a - eyeSeparation * 0.5) * nearPlane / convergence
+ right: (a + eyeSeparation * 0.5) * nearPlane / convergence
+ top: root.top
+ bottom: -root.top
+ }
+
+ CameraLens {
+ id: rightEyeLens
+ projectionType: CameraLens.FrustumProjection
+ nearPlane : root.nearPlane
+ farPlane : root.farPlane
+ left: -(a + eyeSeparation * 0.5) * nearPlane / convergence
+ right: (a - eyeSeparation * 0.5) * nearPlane / convergence
+ top: root.top
+ bottom: -root.top
+ }
+
+ Transform {
+ id: eyeTransform
+ LookAt {
+ id: eyeLookAt
+ upVector: Qt.vector3d(0.0, 1.0, 0.0)
+ viewCenter: root.viewCenter
+ position: root.position
+ }
+ }
+
+ property Entity leftCamera: Entity {
+ components: [
+ leftEyeLens,
+ eyeTransform
+ ]
+ }
+
+ property Entity rightCamera: Entity {
+ id: rightCameraEntity
+ components: [
+ rightEyeLens,
+ eyeTransform
+ ]
+ }
+}