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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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef SPHERE_H
#define SPHERE_H
#include <Qt3DRender/qt3drender_global.h>
#include <Qt3DCore/qnodeid.h>
#include <Qt3DCore/qboundingsphere.h>
#include <QMatrix4x4>
#include <QVector3D>
QT_BEGIN_NAMESPACE
namespace Qt3DRender {
class QT3DRENDERSHARED_EXPORT Sphere : public Qt3DCore::QBoundingSphere
{
public:
inline Sphere(const Qt3DCore::QNodeId &i = Qt3DCore::QNodeId())
: m_center()
, m_radius(0.0f)
, m_id(i)
{}
inline Sphere(const QVector3D &c, float r, const Qt3DCore::QNodeId &i = Qt3DCore::QNodeId())
: m_center(c)
, m_radius(r)
, m_id(i)
{}
void setCenter(const QVector3D &c);
QVector3D center() const;
inline bool isNull() { return m_center == QVector3D() && m_radius == 0.0f; }
void setRadius(float r);
float radius() const;
void clear();
void initializeFromPoints(const QVector<QVector3D> &points);
void expandToContain(const QVector3D &point);
inline void expandToContain(const QVector<QVector3D> &points)
{
Q_FOREACH (const QVector3D &p, points)
expandToContain(p);
}
void expandToContain(const Sphere &sphere);
Sphere transformed(const QMatrix4x4 &mat);
inline Sphere &transform(const QMatrix4x4 &mat)
{
*this = transformed(mat);
return *this;
}
Qt3DCore::QNodeId id() const Q_DECL_FINAL;
bool intersects(const Qt3DCore::QRay3D &ray, QVector3D *q) const Q_DECL_FINAL;
Type type() const Q_DECL_FINAL;
static Sphere fromPoints(const QVector<QVector3D> &points);
private:
QVector3D m_center;
float m_radius;
Qt3DCore::QNodeId m_id;
static const float ms_epsilon;
};
inline void Sphere::setCenter(const QVector3D &c)
{
m_center = c;
}
inline QVector3D Sphere::center() const
{
return m_center;
}
inline void Sphere::setRadius(float r)
{
m_radius = r;
}
inline float Sphere::radius() const
{
return m_radius;
}
inline void Sphere::clear()
{
m_center = QVector3D();
m_radius = 0.0f;
}
inline bool intersects(const Sphere &a, const Sphere &b)
{
// Calculate squared distance between sphere centers
const QVector3D d = a.center() - b.center();
const float distSq = QVector3D::dotProduct(d, d);
// Spheres intersect if squared distance is less than squared
// sum of radii
const float sumRadii = a.radius() + b.radius();
return distSq <= sumRadii * sumRadii;
}
}
QT_END_NAMESPACE
Q_DECLARE_METATYPE(Qt3DRender::Sphere)
#endif // SPHERE_H
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