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Diffstat (limited to 'src/utils/meshloader.cpp')
| -rw-r--r-- | src/utils/meshloader.cpp | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/utils/meshloader.cpp b/src/utils/meshloader.cpp new file mode 100644 index 00000000..0e818a92 --- /dev/null +++ b/src/utils/meshloader.cpp @@ -0,0 +1,148 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtDataVis3D module. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "meshloader_p.h" + +#include <QFile> +#include <QStringList> +#include <QVector> +#include <QVector2D> +#include <QVector3D> + +#include <QDebug> + +QTCOMMERCIALDATAVIS3D_BEGIN_NAMESPACE + +QString slashTag = QStringLiteral("/"); + +bool MeshLoader::loadOBJ(const QString &path, + QVector<QVector3D> &out_vertices, + QVector<QVector2D> &out_uvs, + QVector<QVector3D> &out_normals) +{ + //qDebug() << "Loading OBJ file" << path; + + 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]); + } + else { + //qWarning("Line did not contain usable data"); + } + } + + // 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; +} + +QTCOMMERCIALDATAVIS3D_END_NAMESPACE |