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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "nonindextrianglestopology.h"
#include <QVector3D>
NonIndexTrianglesTopology::NonIndexTrianglesTopology()
{
updateData();
}
void NonIndexTrianglesTopology::updateData()
{
QByteArray vertexData;
setPrimitiveType(QQuick3DGeometry::PrimitiveType::Triangles);
addAttribute(QQuick3DGeometry::Attribute::PositionSemantic, 0,
QQuick3DGeometry::Attribute::ComponentType::F32Type);
addAttribute(QQuick3DGeometry::Attribute::NormalSemantic, 16,
QQuick3DGeometry::Attribute::ComponentType::F32Type);
setStride(32);
// Two Triangles with Vertex + Normals
const int vertexBufferSize = sizeof(float) * 4 * 2 * 6; // 2 x vec4 x 6
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] = -1.0f;
data[25] = 0.0f;
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;
// Vertex 4
data[32] = 0.0f;
data[33] = -1.0f;
data[34] = 0.0f;
data[35] = 1.0f;
// Normal 4
data[36] = 0.0f;
data[37] = 0.0f;
data[38] = 1.0f;
data[39] = 0.0f;
// Vertex 5
data[40] = 1.0f;
data[41] = 0.0f;
data[42] = 0.0f;
data[43] = 1.0f;
// Normal 5
data[44] = 0.0f;
data[45] = 0.0f;
data[46] = 1.0f;
data[47] = 0.0f;
setVertexData(vertexData);
setBounds(QVector3D(-1.0f, -1.0f, 0.0f), QVector3D(1.0f, 1.0f, 0.0f));
}