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| ** Copyright (C) 2015 Klaralvdalens Datakonsult AB (KDAB). |
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| ** This file is part of the Qt3D module of the Qt Toolkit. |
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| |
| import Qt3D.Core 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 vector3d viewCenter: Qt.vector3d(0.0, 0.0, 0.0) |
| property vector3d position: Qt.vector3d(0.0, 0.0, 1.0) |
| property vector3d upVector: Qt.vector3d(0.0, 1.0, 0.0) |
| |
| 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 |
| |
| matrix: { |
| var m = Qt.matrix4x4(); |
| m.translate(root.position) |
| var zAxis = root.position.minus(root.viewCenter).normalized() |
| var xAxis = root.upVector.crossProduct(zAxis).normalized(); |
| var yAxis = zAxis.crossProduct(xAxis); |
| var r = Qt.matrix4x4(xAxis.x, yAxis.x, zAxis.x, 0, |
| xAxis.y, yAxis.y, zAxis.y, 0, |
| xAxis.z, yAxis.z, zAxis.z, 0, |
| 0, 0, 0, 1) |
| return m.times(r); |
| } |
| } |
| |
| components: [ eyeTransform ] |
| |
| property Entity leftCamera: Entity { |
| components: [ leftEyeLens ] |
| } |
| |
| property Entity rightCamera: Entity { |
| id: rightCameraEntity |
| components: [ rightEyeLens ] |
| } |
| } |