Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
++
++ #include "vertexindexer_p.h"
++
++ #include <QtCore/qmath.h>
++ #include <QtCore/qmap.h>
++
++ QT_BEGIN_NAMESPACE
++
++ 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