<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Ring.qml Example File | Qt 3D 5.9</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.9</td><td ><a href="qt3d-index.html">Qt 3D</a></td><td ><a href="qt3d-planets-qml-example.html">Qt 3D: Planets QML Example</a></td><td >Ring.qml Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right">Qt 5.9.4 Reference Documentation</td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">Ring.qml Example File</h1> <span class="subtitle">planets-qml/Ring.qml</span> <!-- $$$planets-qml/Ring.qml-description --> <div class="descr"> <a name="details"></a> <pre class="qml"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2016 The Qt Company Ltd. ** 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> import Qt3D.Render 2.0 <span class="comment">// TODO: Once support for meshes from arrays is implemented, replace ring.obj with that</span> <span class="type"><a href="qml-qt3d-render-mesh.html">Mesh</a></span> { property <span class="type">real</span> <span class="name">innerRadius</span> property <span class="type">real</span> <span class="name">outerRadius</span> <span class="comment">/* property real ringSegments property var vertices: [] property var faces: [] property var faceVertexUvs: [] */</span> <span class="name">source</span>: <span class="string">"qrc:/meshes/ring.obj"</span> <span class="comment">// Converted from the _RingGeometry() method in the threex.planets.js extension.</span> <span class="comment">/* function makeRing() { innerRadius = innerRadius || 0 outerRadius = outerRadius || 50 var thetaSegments = ringSegments || 8 console.log(innerRadius + "," + outerRadius + "," + thetaSegments) var normal = Qt.vector3d(0, 0, 1) for (var i = 0; i < thetaSegments; i++) { var angleLo = (i / thetaSegments) * Math.PI * 2 var angleHi = ((i + 1) / thetaSegments) * Math.PI * 2 var vertex1 = Qt.vector3d(innerRadius * Math.cos(angleLo), innerRadius * Math.sin(angleLo), 0) var vertex2 = Qt.vector3d(outerRadius * Math.cos(angleLo), outerRadius * Math.sin(angleLo), 0) var vertex3 = Qt.vector3d(innerRadius * Math.cos(angleHi), innerRadius * Math.sin(angleHi), 0) var vertex4 = Qt.vector3d(outerRadius * Math.cos(angleHi), outerRadius * Math.sin(angleHi), 0) vertices.push(vertex1) vertices.push(vertex2) vertices.push(vertex3) vertices.push(vertex4) var vertexIdx = i * 4 // Create the first triangle var face = Qt.vector4d(vertexIdx + 0, vertexIdx + 1, vertexIdx + 2, normal) var uvs = [] var uv = Qt.vector2d(0, 0) uvs.push(uv) uv = Qt.vector2d(1, 0) uvs.push(uv) uv = Qt.vector2d(0, 1) uvs.push(uv) faces.push(face) //faceVertexUvs[0].push(uvs) faceVertexUvs.push(uvs) // Create the second triangle face = Qt.vector4d(vertexIdx + 2, vertexIdx + 1, vertexIdx + 3, normal) uvs = [] uv = Qt.vector2d(0, 1) uvs.push(uv) uv = Qt.vector2d(1, 0) uvs.push(uv) uv = Qt.vector2d(1, 1) uvs.push(uv) faces.push(face) //faceVertexUvs[0].push(uvs) faceVertexUvs.push(uvs) } computeFaceNormals() } // Converted from the computeFaceNormals() method in the three.js extension. function computeFaceNormals() { var cb = Qt.vector3d(0, 0, 0) var ab = Qt.vector3d(0, 0, 0) for (var f = 0, fl = faces.length; f < fl; f ++) { var face = faces[f] var vA = vertices[face.x] var vB = vertices[face.y] var vC = vertices[face.z] cb = vC.minus(vB) ab = vA.minus(vB) cb = cb.crossProduct(ab) cb = cb.normalized() face.w = cb } } */</span> } </pre> </div> <!-- @@@planets-qml/Ring.qml --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2017 The Qt Company Ltd. 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