| /**************************************************************************** |
| ** |
| ** 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 "meshloader_p.h" |
| |
| #include <QtCore/QFile> |
| #include <QtCore/QStringList> |
| #include <QtCore/QVector> |
| #include <QtGui/QVector2D> |
| |
| QT_BEGIN_NAMESPACE_DATAVISUALIZATION |
| |
| QString slashTag = QStringLiteral("/"); |
| |
| bool MeshLoader::loadOBJ(const QString &path, |
| QVector<QVector3D> &out_vertices, |
| QVector<QVector2D> &out_uvs, |
| QVector<QVector3D> &out_normals) |
| { |
| QVector<unsigned int> vertexIndices, uvIndices, normalIndices; |
| QVector<QVector3D> temp_vertices; |
| QVector<QVector2D> temp_uvs; |
| QVector<QVector3D> temp_normals; |
| |
| QFile file(path); |
| if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) { |
| qWarning("Cannot open the file"); |
| return false; |
| } |
| |
| QTextStream textIn(&file); |
| while (!textIn.atEnd()) { |
| QString line = textIn.readLine(); |
| QStringList lineContents = line.split(QStringLiteral(" ")); |
| if (!lineContents.at(0).compare(QStringLiteral("v"))) { |
| QVector3D vertex; |
| vertex.setX(lineContents.at(1).toFloat()); |
| vertex.setY(lineContents.at(2).toFloat()); |
| vertex.setZ(lineContents.at(3).toFloat()); |
| temp_vertices.append(vertex); |
| } |
| else if (!lineContents.at(0).compare(QStringLiteral("vt"))) { |
| QVector2D uv; |
| uv.setX(lineContents.at(1).toFloat()); |
| uv.setY(lineContents.at(2).toFloat()); // invert this if using DDS textures |
| temp_uvs.append(uv); |
| } |
| else if (!lineContents.at(0).compare(QStringLiteral("vn"))) { |
| QVector3D normal; |
| normal.setX(lineContents.at(1).toFloat()); |
| normal.setY(lineContents.at(2).toFloat()); |
| normal.setZ(lineContents.at(3).toFloat()); |
| temp_normals.append(normal); |
| } |
| else if (!lineContents.at(0).compare(QStringLiteral("f"))) { |
| unsigned int vertexIndex[3], uvIndex[3], normalIndex[3]; |
| QStringList set1 = lineContents.at(1).split(slashTag); |
| QStringList set2 = lineContents.at(2).split(slashTag); |
| QStringList set3 = lineContents.at(3).split(slashTag); |
| vertexIndex[0] = set1.at(0).toUInt(); |
| vertexIndex[1] = set2.at(0).toUInt(); |
| vertexIndex[2] = set3.at(0).toUInt(); |
| uvIndex[0] = set1.at(1).toUInt(); |
| uvIndex[1] = set2.at(1).toUInt(); |
| uvIndex[2] = set3.at(1).toUInt(); |
| normalIndex[0] = set1.at(2).toUInt(); |
| normalIndex[1] = set2.at(2).toUInt(); |
| normalIndex[2] = set3.at(2).toUInt(); |
| vertexIndices.append(vertexIndex[0]); |
| vertexIndices.append(vertexIndex[1]); |
| vertexIndices.append(vertexIndex[2]); |
| uvIndices.append(uvIndex[0]); |
| uvIndices.append(uvIndex[1]); |
| uvIndices.append(uvIndex[2]); |
| normalIndices.append(normalIndex[0]); |
| normalIndices.append(normalIndex[1]); |
| normalIndices.append(normalIndex[2]); |
| } |
| } |
| |
| // For each vertex of each triangle |
| for (int i = 0; i < vertexIndices.size(); i++) { |
| // Get the indices of its attributes |
| unsigned int vertexIndex = vertexIndices[i]; |
| unsigned int uvIndex = uvIndices[i]; |
| unsigned int normalIndex = normalIndices[i]; |
| |
| // Get the attributes thanks to the index |
| QVector3D vertex = temp_vertices[vertexIndex - 1]; |
| QVector2D uv = temp_uvs[uvIndex - 1]; |
| QVector3D normal = temp_normals[normalIndex - 1]; |
| |
| // Put the attributes in buffers |
| out_vertices.append(vertex); |
| out_uvs.append(uv); |
| out_normals.append(normal); |
| } |
| |
| return true; |
| } |
| |
| QT_END_NAMESPACE_DATAVISUALIZATION |