qcollisiondebugmeshbuilder.cpp

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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#include "qcollisiondebugmeshbuilder_p.h"
 
QT_BEGIN_NAMESPACE
 
QCollisionDebugMeshBuilder::QCollisionDebugMeshBuilder() { }
 
void QCollisionDebugMeshBuilder::reset()
{
    m_vertices.clear();
    m_normals.clear();
}
 
void QCollisionDebugMeshBuilder::addLine(const QVector3D &start, const QVector3D &end,
                                         const QVector3D &normal)
{
    m_vertices.append(start);
    m_vertices.append(end);
    m_normals.append(normal);
}
 
QByteArray QCollisionDebugMeshBuilder::generateVertexArray()
{
    QByteArray output;
    const int size = m_normals.count();
    output.resize(4 * 4 * sizeof(float) * size);
 
    float *data = reinterpret_cast<float *>(output.data());
 
    for (int i = 0; i < size; ++i) {
        const QVector3D &start = m_vertices[i * 2];
        const QVector3D &end = m_vertices[i * 2 + 1];
        const QVector3D &normal = m_normals[i];
 
        data[0] = start.x();
        data[1] = start.y();
        data[2] = start.z();
        data[4] = 1.0f;
 
        data[5] = normal.x();
        data[6] = normal.y();
        data[7] = normal.z();
        data[8] = 0.0f;
 
        data += 8;
        data[0] = end.x();
        data[1] = end.y();
        data[2] = end.z();
        data[4] = 1.0f;
 
        data[5] = normal.x();
        data[6] = normal.y();
        data[7] = normal.z();
        data[8] = 0.0f;
 
        data += 8;
    }
 
    return output;
}
 
QT_END_NAMESPACE