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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 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 Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or 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.GPL2 and 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-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef OBJLOADER_H
#define OBJLOADER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QVector>
#include <QVector2D>
#include <QVector3D>
#include <QVector4D>
#include <limits>
QT_BEGIN_NAMESPACE
class QString;
class QIODevice;
namespace Qt3DRender {
class QGeometry;
struct FaceIndices
{
FaceIndices()
: positionIndex(std::numeric_limits<unsigned int>::max())
, texCoordIndex(std::numeric_limits<unsigned int>::max())
, normalIndex(std::numeric_limits<unsigned int>::max())
{}
FaceIndices(unsigned int posIndex, unsigned int tcIndex, unsigned int nIndex)
: positionIndex(posIndex)
, texCoordIndex(tcIndex)
, normalIndex(nIndex)
{}
bool operator == (const FaceIndices &other) const
{
return positionIndex == other.positionIndex &&
texCoordIndex == other.texCoordIndex &&
normalIndex == other.normalIndex;
}
unsigned int positionIndex;
unsigned int texCoordIndex;
unsigned int normalIndex;
};
class Q_AUTOTEST_EXPORT ObjLoader
{
public:
ObjLoader();
void setLoadTextureCoordinatesEnabled( bool b ) { m_loadTextureCoords = b; }
bool isLoadTextureCoordinatesEnabled() const { return m_loadTextureCoords; }
void setTangentGenerationEnabled( bool b ) { m_generateTangents = b; }
bool isTangentGenerationEnabled() const { return m_generateTangents; }
void setMeshCenteringEnabled( bool b ) { m_centerMesh = b; }
bool isMeshCenteringEnabled() const { return m_centerMesh; }
bool hasNormals() const { return !m_normals.isEmpty(); }
bool hasTextureCoordinates() const { return !m_texCoords.isEmpty(); }
bool hasTangents() const { return !m_tangents.isEmpty(); }
bool load( const QString& fileName, const QString& subMesh = QString() );
bool load( ::QIODevice* ioDev, const QString& subMesh = QString() );
QVector<QVector3D> vertices() const { return m_points; }
QVector<QVector3D> normals() const { return m_normals; }
QVector<QVector2D> textureCoordinates() const { return m_texCoords; }
QVector<QVector4D> tangents() const { return m_tangents; }
QVector<unsigned int> indices() const { return m_indices; }
QGeometry *geometry() const;
private:
void updateIndices(const QVector<QVector3D> &positions,
const QVector<QVector3D> &normals,
const QVector<QVector2D> &texCoords,
const QHash<FaceIndices, unsigned int> &faceIndexMap,
const QVector<FaceIndices> &faceIndexVector);
void generateAveragedNormals( const QVector<QVector3D>& points,
QVector<QVector3D>& normals,
const QVector<unsigned int>& faces ) const;
void generateTangents( const QVector<QVector3D>& points,
const QVector<QVector3D>& normals,
const QVector<unsigned int>& faces,
const QVector<QVector2D>& texCoords,
QVector<QVector4D>& tangents ) const;
void center( QVector<QVector3D>& points );
bool m_loadTextureCoords;
bool m_generateTangents;
bool m_centerMesh;
QVector<QVector3D> m_points;
QVector<QVector3D> m_normals;
QVector<QVector2D> m_texCoords;
QVector<QVector4D> m_tangents;
QVector<unsigned int> m_indices;
};
}
QT_END_NAMESPACE
#endif // OBJLOADER_H
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