+// Copyright (C) 2006 Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// 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 General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+//
+
#ifndef SGVec3_H
#define SGVec3_H
+#include <osg/Vec3f>
+#include <osg/Vec3d>
+
+template<typename T>
+struct SGVec3Storage {
+ /// Readonly raw storage interface
+ const T (&data(void) const)[3]
+ { return _data; }
+ /// Readonly raw storage interface
+ T (&data(void))[3]
+ { return _data; }
+
+ void osg() const
+ { }
+
+private:
+ T _data[3];
+};
+
+template<>
+struct SGVec3Storage<float> : public osg::Vec3f {
+ /// Access raw data by index, the index is unchecked
+ const float (&data(void) const)[3]
+ { return osg::Vec3f::_v; }
+ /// Access raw data by index, the index is unchecked
+ float (&data(void))[3]
+ { return osg::Vec3f::_v; }
+
+ const osg::Vec3f& osg() const
+ { return *this; }
+ osg::Vec3f& osg()
+ { return *this; }
+};
+
+template<>
+struct SGVec3Storage<double> : public osg::Vec3d {
+ /// Access raw data by index, the index is unchecked
+ const double (&data(void) const)[3]
+ { return osg::Vec3d::_v; }
+ /// Access raw data by index, the index is unchecked
+ double (&data(void))[3]
+ { return osg::Vec3d::_v; }
+
+ const osg::Vec3d& osg() const
+ { return *this; }
+ osg::Vec3d& osg()
+ { return *this; }
+};
+
/// 3D Vector Class
template<typename T>
-class SGVec3 {
+class SGVec3 : protected SGVec3Storage<T> {
public:
typedef T value_type;
/// uninitialized values in the debug build very fast ...
#ifndef NDEBUG
for (unsigned i = 0; i < 3; ++i)
- _data[i] = SGLimits<T>::quiet_NaN();
+ data()[i] = SGLimits<T>::quiet_NaN();
#endif
}
/// Constructor. Initialize by the given values
SGVec3(T x, T y, T z)
- { _data[0] = x; _data[1] = y; _data[2] = z; }
+ { data()[0] = x; data()[1] = y; data()[2] = z; }
/// Constructor. Initialize by the content of a plain array,
/// make sure it has at least 3 elements
- explicit SGVec3(const T* data)
- { _data[0] = data[0]; _data[1] = data[1]; _data[2] = data[2]; }
- /// Constructor. Initialize by a geodetic coordinate
- /// Note that this conversion is relatively expensive to compute
- SGVec3(const SGGeod& geod)
- { SGGeodesy::SGGeodToCart(geod, *this); }
- /// Constructor. Initialize by a geocentric coordinate
- /// Note that this conversion is relatively expensive to compute
- SGVec3(const SGGeoc& geoc)
- { SGGeodesy::SGGeocToCart(geoc, *this); }
+ explicit SGVec3(const T* d)
+ { data()[0] = d[0]; data()[1] = d[1]; data()[2] = d[2]; }
+ explicit SGVec3(const osg::Vec3f& d)
+ { data()[0] = d[0]; data()[1] = d[1]; data()[2] = d[2]; }
+ explicit SGVec3(const osg::Vec3d& d)
+ { data()[0] = d[0]; data()[1] = d[1]; data()[2] = d[2]; }
/// Access by index, the index is unchecked
const T& operator()(unsigned i) const
- { return _data[i]; }
+ { return data()[i]; }
/// Access by index, the index is unchecked
T& operator()(unsigned i)
- { return _data[i]; }
+ { return data()[i]; }
+
+ /// Access raw data by index, the index is unchecked
+ const T& operator[](unsigned i) const
+ { return data()[i]; }
+ /// Access raw data by index, the index is unchecked
+ T& operator[](unsigned i)
+ { return data()[i]; }
/// Access the x component
const T& x(void) const
- { return _data[0]; }
+ { return data()[0]; }
/// Access the x component
T& x(void)
- { return _data[0]; }
+ { return data()[0]; }
/// Access the y component
const T& y(void) const
- { return _data[1]; }
+ { return data()[1]; }
/// Access the y component
T& y(void)
- { return _data[1]; }
+ { return data()[1]; }
/// Access the z component
const T& z(void) const
- { return _data[2]; }
+ { return data()[2]; }
/// Access the z component
T& z(void)
- { return _data[2]; }
+ { return data()[2]; }
/// Get the data pointer
- const T* data(void) const
- { return _data; }
- /// Get the data pointer
- T* data(void)
- { return _data; }
+ using SGVec3Storage<T>::data;
/// Readonly interface function to ssg's sgVec3/sgdVec3
const T (&sg(void) const)[3]
- { return _data; }
+ { return data(); }
/// Interface function to ssg's sgVec3/sgdVec3
T (&sg(void))[3]
- { return _data; }
+ { return data(); }
+
+ /// Interface function to osg's Vec3*
+ using SGVec3Storage<T>::osg;
/// Inplace addition
SGVec3& operator+=(const SGVec3& v)
- { _data[0] += v(0); _data[1] += v(1); _data[2] += v(2); return *this; }
+ { data()[0] += v(0); data()[1] += v(1); data()[2] += v(2); return *this; }
/// Inplace subtraction
SGVec3& operator-=(const SGVec3& v)
- { _data[0] -= v(0); _data[1] -= v(1); _data[2] -= v(2); return *this; }
+ { data()[0] -= v(0); data()[1] -= v(1); data()[2] -= v(2); return *this; }
/// Inplace scalar multiplication
template<typename S>
SGVec3& operator*=(S s)
- { _data[0] *= s; _data[1] *= s; _data[2] *= s; return *this; }
+ { data()[0] *= s; data()[1] *= s; data()[2] *= s; return *this; }
/// Inplace scalar multiplication by 1/s
template<typename S>
SGVec3& operator/=(S s)
static SGVec3 e3(void)
{ return SGVec3(0, 0, 1); }
-private:
- /// The actual data
- T _data[3];
+ /// Constructor. Initialize by a geodetic coordinate
+ /// Note that this conversion is relatively expensive to compute
+ static SGVec3 fromGeod(const SGGeod& geod);
+ /// Constructor. Initialize by a geocentric coordinate
+ /// Note that this conversion is relatively expensive to compute
+ static SGVec3 fromGeoc(const SGGeoc& geoc);
};
+template<>
+inline
+SGVec3<double>
+SGVec3<double>::fromGeod(const SGGeod& geod)
+{
+ SGVec3<double> cart;
+ SGGeodesy::SGGeodToCart(geod, cart);
+ return cart;
+}
+
+template<>
+inline
+SGVec3<float>
+SGVec3<float>::fromGeod(const SGGeod& geod)
+{
+ SGVec3<double> cart;
+ SGGeodesy::SGGeodToCart(geod, cart);
+ return SGVec3<float>(cart(0), cart(1), cart(2));
+}
+
+template<>
+inline
+SGVec3<double>
+SGVec3<double>::fromGeoc(const SGGeoc& geoc)
+{
+ SGVec3<double> cart;
+ SGGeodesy::SGGeocToCart(geoc, cart);
+ return cart;
+}
+
+template<>
+inline
+SGVec3<float>
+SGVec3<float>::fromGeoc(const SGGeoc& geoc)
+{
+ SGVec3<double> cart;
+ SGGeodesy::SGGeocToCart(geoc, cart);
+ return SGVec3<float>(cart(0), cart(1), cart(2));
+}
+
/// Unary +, do nothing ...
template<typename T>
inline
operator*(const SGVec3<T>& v, S s)
{ return SGVec3<T>(s*v(0), s*v(1), s*v(2)); }
+/// component wise min
+template<typename T>
+inline
+SGVec3<T>
+min(const SGVec3<T>& v1, const SGVec3<T>& v2)
+{
+ return SGVec3<T>(SGMisc<T>::min(v1(0), v2(0)),
+ SGMisc<T>::min(v1(1), v2(1)),
+ SGMisc<T>::min(v1(2), v2(2)));
+}
+template<typename S, typename T>
+inline
+SGVec3<T>
+min(const SGVec3<T>& v, S s)
+{
+ return SGVec3<T>(SGMisc<T>::min(s, v(0)),
+ SGMisc<T>::min(s, v(1)),
+ SGMisc<T>::min(s, v(2)));
+}
+template<typename S, typename T>
+inline
+SGVec3<T>
+min(S s, const SGVec3<T>& v)
+{
+ return SGVec3<T>(SGMisc<T>::min(s, v(0)),
+ SGMisc<T>::min(s, v(1)),
+ SGMisc<T>::min(s, v(2)));
+}
+
+/// component wise max
+template<typename T>
+inline
+SGVec3<T>
+max(const SGVec3<T>& v1, const SGVec3<T>& v2)
+{
+ return SGVec3<T>(SGMisc<T>::max(v1(0), v2(0)),
+ SGMisc<T>::max(v1(1), v2(1)),
+ SGMisc<T>::max(v1(2), v2(2)));
+}
+template<typename S, typename T>
+inline
+SGVec3<T>
+max(const SGVec3<T>& v, S s)
+{
+ return SGVec3<T>(SGMisc<T>::max(s, v(0)),
+ SGMisc<T>::max(s, v(1)),
+ SGMisc<T>::max(s, v(2)));
+}
+template<typename S, typename T>
+inline
+SGVec3<T>
+max(S s, const SGVec3<T>& v)
+{
+ return SGVec3<T>(SGMisc<T>::max(s, v(0)),
+ SGMisc<T>::max(s, v(1)),
+ SGMisc<T>::max(s, v(2)));
+}
+
/// Scalar dot product
template<typename T>
inline
return equivalent(v1, v2, tol, tol);
}
+/// The euclidean distance of the two vectors
+template<typename T>
+inline
+T
+dist(const SGVec3<T>& v1, const SGVec3<T>& v2)
+{ return norm(v1 - v2); }
+
+/// The squared euclidean distance of the two vectors
+template<typename T>
+inline
+T
+distSqr(const SGVec3<T>& v1, const SGVec3<T>& v2)
+{ SGVec3<T> tmp = v1 - v2; return dot(tmp, tmp); }
+
#ifndef NDEBUG
template<typename T>
inline
operator<<(std::basic_ostream<char_type, traits_type>& s, const SGVec3<T>& v)
{ return s << "[ " << v(0) << ", " << v(1) << ", " << v(2) << " ]"; }
-/// Two classes doing actually the same on different types
-typedef SGVec3<float> SGVec3f;
-typedef SGVec3<double> SGVec3d;
-
inline
SGVec3f
toVec3f(const SGVec3d& v)
-{ return SGVec3f(v(0), v(1), v(2)); }
+{ return SGVec3f((float)v(0), (float)v(1), (float)v(2)); }
inline
SGVec3d
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