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/****************************************************************************
**
** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt3D module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://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.LGPLv3 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.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 later 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 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "tessellatedquadmesh.h"
#include <Qt3DRenderer/qattribute.h>
#include <Qt3DRenderer/qbuffer.h>
#include <Qt3DRenderer/qmeshdata.h>
TessellatedQuadMesh::TessellatedQuadMesh(Qt3D::QNode *parent)
: Qt3D::QAbstractMesh(parent)
{
}
class TessellatedQuadMeshFunctor : public Qt3D::QAbstractMeshFunctor
{
public:
TessellatedQuadMeshFunctor() {}
Qt3D::QMeshDataPtr operator ()() Q_DECL_OVERRIDE
{
const float positionData[] = {
-0.8f, -0.8f, 0.0f,
0.8f, -0.8f, 0.0f,
0.8f, 0.8f, 0.0f,
-0.8f, 0.8f, 0.0f
};
const int nVerts = 4;
const int size = nVerts * 3 * sizeof(float);
QByteArray positionBytes;
positionBytes.resize(size);
memcpy(positionBytes.data(), positionData, size);
Qt3D::BufferPtr vertexBuffer(new Qt3D::Buffer(QOpenGLBuffer::VertexBuffer));
vertexBuffer->setUsage(QOpenGLBuffer::StaticDraw);
vertexBuffer->setData(positionBytes);
Qt3D::QMeshDataPtr mesh(new Qt3D::QMeshData(Qt3D::QMeshData::Patches));
mesh->addAttribute(Qt3D::QMeshData::defaultPositionAttributeName(),
Qt3D::AttributePtr(new Qt3D::Attribute(vertexBuffer, GL_FLOAT_VEC3, nVerts)));
mesh->setVerticesPerPatch(4);
return mesh;
}
bool operator ==(const Qt3D::QAbstractMeshFunctor &other) const
{
const TessellatedQuadMeshFunctor *otherFunctor = dynamic_cast<const TessellatedQuadMeshFunctor *>(&other);
if (otherFunctor != Q_NULLPTR)
return true;
return false;
}
};
Qt3D::QAbstractMeshFunctorPtr TessellatedQuadMesh::meshFunctor() const
{
return Qt3D::QAbstractMeshFunctorPtr(new TessellatedQuadMeshFunctor);
}
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