forked from qt-creator/qt-creator
81 lines
3.1 KiB
QML
81 lines
3.1 KiB
QML
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/****************************************************************************
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**
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** Copyright (C) 2019 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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****************************************************************************/
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import QtQuick 2.0
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import QtQuick3D 1.0
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import MouseArea3D 1.0
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Node {
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id: overlayNode
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property View3D view3D
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property Node target: parent
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property bool autoScale: true
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// Read-only
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property real relativeScale: 1
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onGlobalTransformChanged: updateScale()
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onAutoScaleChanged: updateScale()
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Connections {
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target: view3D.camera
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onGlobalTransformChanged: updateScale()
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}
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function getScale(baseScale)
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{
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return Qt.vector3d(baseScale.x * relativeScale, baseScale.y * relativeScale,
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baseScale.z * relativeScale);
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}
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function updateScale()
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{
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if (!autoScale) {
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target.scale = Qt.vector3d(1, 1, 1);
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} else {
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// Calculate the distance independent scale by first mapping the targets position to
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// the view. We then measure up a distance on the view (100px) that we use as an
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// "anchor" distance. Map the two positions back to the target node, and measure the
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// distance between them now, in the 3D scene. The difference of the two distances,
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// view and scene, will tell us what the distance independent scale should be.
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var posInView1 = view3D.mapFrom3DScene(positionInScene);
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var posInView2 = Qt.vector3d(posInView1.x + 100, posInView1.y, posInView1.z);
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var rayPos1 = view3D.mapTo3DScene(Qt.vector3d(posInView2.x, posInView2.y, 0));
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var rayPos2 = view3D.mapTo3DScene(Qt.vector3d(posInView2.x, posInView2.y, 10));
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var planeNormal = view3D.camera.forward;
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var rayHitPos = helper.rayIntersectsPlane(rayPos1, rayPos2, positionInScene,
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planeNormal);
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relativeScale = positionInScene.minus(rayHitPos).length() / 100;
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}
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}
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MouseArea3D {
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id: helper
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view3D: overlayNode.view3D
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}
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}
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