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/*
Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <wildfox@kde.org>
2004, 2005 Rob Buis <buis@kde.org>
2005 Eric Seidel <eric@webkit.org>
2010 Zoltan Herczeg <zherczeg@webkit.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
aint with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef FloatPoint3D_h
#define FloatPoint3D_h
#include "FloatPoint.h"
namespace WebCore {
class FloatPoint3D {
public:
FloatPoint3D()
: m_x(0)
, m_y(0)
, m_z(0)
{
}
FloatPoint3D(float x, float y, float z)
: m_x(x)
, m_y(y)
, m_z(z)
{
}
FloatPoint3D(const FloatPoint& p)
: m_x(p.x())
, m_y(p.y())
, m_z(0)
{
}
FloatPoint3D(const FloatPoint3D& p)
: m_x(p.x())
, m_y(p.y())
, m_z(p.z())
{
}
float x() const { return m_x; }
void setX(float x) { m_x = x; }
float y() const { return m_y; }
void setY(float y) { m_y = y; }
float z() const { return m_z; }
void setZ(float z) { m_z = z; }
void set(float x, float y, float z)
{
m_x = x;
m_y = y;
m_z = z;
}
void move(float dx, float dy, float dz)
{
m_x += dx;
m_y += dy;
m_z += dz;
}
void scale(float sx, float sy, float sz)
{
m_x *= sx;
m_y *= sy;
m_z *= sz;
}
bool isZero() const
{
return !m_x && !m_y && !m_z;
}
void normalize();
float dot(const FloatPoint3D& a) const
{
return m_x * a.x() + m_y * a.y() + m_z * a.z();
}
// Sets this FloatPoint3D to the cross product of the passed two.
// It is safe for "this" to be the same as either or both of the
// arguments.
void cross(const FloatPoint3D& a, const FloatPoint3D& b)
{
float x = a.y() * b.z() - a.z() * b.y();
float y = a.z() * b.x() - a.x() * b.z();
float z = a.x() * b.y() - a.y() * b.x();
m_x = x;
m_y = y;
m_z = z;
}
// Convenience function returning "this cross point" as a
// stack-allocated result.
FloatPoint3D cross(const FloatPoint3D& point) const
{
FloatPoint3D result;
result.cross(*this, point);
return result;
}
float lengthSquared() const { return this->dot(*this); }
float length() const { return sqrtf(lengthSquared()); }
float distanceTo(const FloatPoint3D& a) const;
private:
float m_x;
float m_y;
float m_z;
};
inline FloatPoint3D& operator +=(FloatPoint3D& a, const FloatPoint3D& b)
{
a.move(b.x(), b.y(), b.z());
return a;
}
inline FloatPoint3D& operator -=(FloatPoint3D& a, const FloatPoint3D& b)
{
a.move(-b.x(), -b.y(), -b.z());
return a;
}
inline FloatPoint3D operator+(const FloatPoint3D& a, const FloatPoint3D& b)
{
return FloatPoint3D(a.x() + b.x(), a.y() + b.y(), a.z() + b.z());
}
inline FloatPoint3D operator-(const FloatPoint3D& a, const FloatPoint3D& b)
{
return FloatPoint3D(a.x() - b.x(), a.y() - b.y(), a.z() - b.z());
}
inline bool operator==(const FloatPoint3D& a, const FloatPoint3D& b)
{
return a.x() == b.x() && a.y() == b.y() && a.z() == b.z();
}
inline bool operator!=(const FloatPoint3D& a, const FloatPoint3D& b)
{
return a.x() != b.x() || a.y() != b.y() || a.z() != b.z();
}
inline float operator*(const FloatPoint3D& a, const FloatPoint3D& b)
{
// dot product
return a.dot(b);
}
inline FloatPoint3D operator*(float k, const FloatPoint3D& v)
{
return FloatPoint3D(k * v.x(), k * v.y(), k * v.z());
}
inline FloatPoint3D operator*(const FloatPoint3D& v, float k)
{
return FloatPoint3D(k * v.x(), k * v.y(), k * v.z());
}
inline float FloatPoint3D::distanceTo(const FloatPoint3D& a) const
{
return (*this - a).length();
}
} // namespace WebCore
#endif // FloatPoint3D_h
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