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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Data Visualization module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "vertexindexer_p.h"
#include <QtCore/qmath.h>
QT_BEGIN_NAMESPACE_DATAVISUALIZATION
int unique_vertices = 0;
bool VertexIndexer::getSimilarVertexIndex_fast(const PackedVertex &packed,
QMap<PackedVertex, GLuint> &VertexToOutIndex,
GLuint &result)
{
QMap<PackedVertex, GLuint>::iterator it = VertexToOutIndex.find(packed);
if (it == VertexToOutIndex.end()) {
return false;
} else {
result = it.value();
return true;
}
}
void VertexIndexer::indexVBO(const QList<QVector3D> &in_vertices, const QList<QVector2D> &in_uvs,
const QList<QVector3D> &in_normals, QList<GLuint> &out_indices,
QList<QVector3D> &out_vertices, QList<QVector2D> &out_uvs,
QList<QVector3D> &out_normals)
{
unique_vertices = 0;
QMap<PackedVertex, GLuint> VertexToOutIndex;
// For each input vertex
for (int i = 0; i < in_vertices.size(); i++) {
PackedVertex packed = {in_vertices[i], in_uvs[i], in_normals[i]};
// Try to find a similar vertex in out_XXXX
GLuint index;
bool found = getSimilarVertexIndex_fast(packed, VertexToOutIndex, index);
if (found) {
out_indices.append(index);
} else {
unique_vertices++;
out_vertices.append(in_vertices[i]);
out_uvs.append(in_uvs[i]);
out_normals.append(in_normals[i]);
GLuint newindex = (GLuint)out_vertices.size() - 1;
out_indices.append(newindex);
VertexToOutIndex[packed] = newindex;
}
}
}
QT_END_NAMESPACE_DATAVISUALIZATION
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