Revision control
++ // Copyright (C) 2020 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ #include "pointstopology.h"
++
++ #include <QVector3D>
++
++ PointsTopology::PointsTopology()
++ {
++ updateData();
++ }
++
++ void PointsTopology::updateData()
++ {
++ QByteArray vertexData;
++
++ setPrimitiveType(QQuick3DGeometry::PrimitiveType::Points);
++ addAttribute(QQuick3DGeometry::Attribute::PositionSemantic, 0,
++ QQuick3DGeometry::Attribute::ComponentType::F32Type);
++ addAttribute(QQuick3DGeometry::Attribute::NormalSemantic, 16,
++ QQuick3DGeometry::Attribute::ComponentType::F32Type);
++ setStride(32);
++
++ // Four Points with Vertex + Normals
++ const int vertexBufferSize = sizeof(float) * 4 * 2 * 4; // 2 x vec4 x 4
++ vertexData.resize(vertexBufferSize);
++
++ float *data = reinterpret_cast<float *>(vertexData.data());
++ // Vertex 0
++ data[0] = 0.0f;
++ data[1] = 1.0f;
++ data[2] = 0.0f;
++ data[3] = 1.0f;
++ // Normal 0
++ data[4] = 0.0f;
++ data[5] = 0.0f;
++ data[6] = 1.0f;
++ data[7] = 0.0f;
++
++ // Vertex 1
++ data[8] = -1.0f;
++ data[9] = 0.0f;
++ data[10] = 0.0f;
++ data[11] = 1.0f;
++ // Normal 1
++ data[12] = 0.0f;
++ data[13] = 0.0f;
++ data[14] = 1.0f;
++ data[15] = 0.0f;
++
++ // Vertex 2
++ data[16] = 1.0f;
++ data[17] = 0.0f;
++ data[18] = 0.0f;
++ data[19] = 1.0f;
++ // Normal 2
++ data[20] = 0.0f;
++ data[21] = 0.0f;
++ data[22] = 1.0f;
++ data[23] = 0.0f;
++
++ // Vertex 3
++ data[24] = 0.0f;
++ data[25] = -1.0f;
++ data[26] = 0.0f;
++ data[27] = 1.0f;
++ // Normal 3
++ data[28] = 0.0f;
++ data[29] = 0.0f;
++ data[30] = 1.0f;
++ data[31] = 0.0f;
++
++ setVertexData(vertexData);
++
++ setBounds(QVector3D(-1.0f, -1.0f, 0.0f), QVector3D(1.0f, 1.0f, 0.0f));
++ }