// 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 along with this library; if not, write to the
-// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-// Boston, MA 02111-1307, USA.
+// 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 SGVec4_H
#define SGVec4_H
+#include <osg/Vec4f>
+#include <osg/Vec4d>
+
+template<typename T>
+struct SGVec4Storage {
+ /// Readonly raw storage interface
+ const T (&data(void) const)[4]
+ { return _data; }
+ /// Readonly raw storage interface
+ T (&data(void))[4]
+ { return _data; }
+
+ void osg() const
+ { }
+
+private:
+ T _data[4];
+};
+
+template<>
+struct SGVec4Storage<float> : public osg::Vec4f {
+ /// Access raw data by index, the index is unchecked
+ const float (&data(void) const)[4]
+ { return osg::Vec4f::_v; }
+ /// Access raw data by index, the index is unchecked
+ float (&data(void))[4]
+ { return osg::Vec4f::_v; }
+
+ const osg::Vec4f& osg() const
+ { return *this; }
+ osg::Vec4f& osg()
+ { return *this; }
+};
+
+template<>
+struct SGVec4Storage<double> : public osg::Vec4d {
+ /// Access raw data by index, the index is unchecked
+ const double (&data(void) const)[4]
+ { return osg::Vec4d::_v; }
+ /// Access raw data by index, the index is unchecked
+ double (&data(void))[4]
+ { return osg::Vec4d::_v; }
+
+ const osg::Vec4d& osg() const
+ { return *this; }
+ osg::Vec4d& osg()
+ { return *this; }
+};
+
/// 4D Vector Class
template<typename T>
-class SGVec4 {
+class SGVec4 : protected SGVec4Storage<T> {
public:
typedef T value_type;
/// uninitialized values in the debug build very fast ...
#ifndef NDEBUG
for (unsigned i = 0; i < 4; ++i)
- _data[i] = SGLimits<T>::quiet_NaN();
+ data()[i] = SGLimits<T>::quiet_NaN();
#endif
}
/// Constructor. Initialize by the given values
SGVec4(T x, T y, T z, T w)
- { _data[0] = x; _data[1] = y; _data[2] = z; _data[3] = w; }
+ { data()[0] = x; data()[1] = y; data()[2] = z; data()[3] = w; }
/// Constructor. Initialize by the content of a plain array,
/// make sure it has at least 3 elements
explicit SGVec4(const T* d)
- { _data[0] = d[0]; _data[1] = d[1]; _data[2] = d[2]; _data[3] = d[3]; }
+ { data()[0] = d[0]; data()[1] = d[1]; data()[2] = d[2]; data()[3] = d[3]; }
+ explicit SGVec4(const osg::Vec4f& d)
+ { data()[0] = d[0]; data()[1] = d[1]; data()[2] = d[2]; data()[3] = d[3]; }
+ explicit SGVec4(const osg::Vec4d& d)
+ { data()[0] = d[0]; data()[1] = d[1]; data()[2] = d[2]; data()[3] = d[3]; }
/// 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]; }
+ { return data()[i]; }
/// Access raw data by index, the index is unchecked
T& operator[](unsigned i)
- { return _data[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]; }
/// Access the x component
const T& w(void) const
- { return _data[3]; }
+ { return data()[3]; }
/// Access the x component
T& w(void)
- { return _data[3]; }
+ { return data()[3]; }
+ /// Get the data pointer
+ using SGVec4Storage<T>::data;
- /// Get the data pointer, usefull for interfacing with plib's sg*Vec
- const T* data(void) const
- { return _data; }
- /// Get the data pointer, usefull for interfacing with plib's sg*Vec
- T* data(void)
- { return _data; }
-
- /// Readonly interface function to ssg's sgVec3/sgdVec3
+ /// Readonly interface function to ssg's sgVec4/sgdVec4
const T (&sg(void) const)[4]
- { return _data; }
- /// Interface function to ssg's sgVec3/sgdVec3
+ { return data(); }
+ /// Interface function to ssg's sgVec4/sgdVec4
T (&sg(void))[4]
- { return _data; }
+ { return data(); }
+
+ /// Interface function to osg's Vec4*
+ using SGVec4Storage<T>::osg;
/// Inplace addition
SGVec4& operator+=(const SGVec4& v)
- { _data[0]+=v(0);_data[1]+=v(1);_data[2]+=v(2);_data[3]+=v(3);return *this; }
+ { data()[0]+=v(0);data()[1]+=v(1);data()[2]+=v(2);data()[3]+=v(3);return *this; }
/// Inplace subtraction
SGVec4& operator-=(const SGVec4& v)
- { _data[0]-=v(0);_data[1]-=v(1);_data[2]-=v(2);_data[3]-=v(3);return *this; }
+ { data()[0]-=v(0);data()[1]-=v(1);data()[2]-=v(2);data()[3]-=v(3);return *this; }
/// Inplace scalar multiplication
template<typename S>
SGVec4& operator*=(S s)
- { _data[0] *= s; _data[1] *= s; _data[2] *= s; _data[3] *= s; return *this; }
+ { data()[0] *= s; data()[1] *= s; data()[2] *= s; data()[3] *= s; return *this; }
/// Inplace scalar multiplication by 1/s
template<typename S>
SGVec4& operator/=(S s)
{ return SGVec4(0, 0, 1, 0); }
static SGVec4 e4(void)
{ return SGVec4(0, 0, 0, 1); }
-
-private:
- /// The actual data
- T _data[4];
};
/// Unary +, do nothing ...
return equivalent(v1, v2, tol, tol);
}
+/// The euclidean distance of the two vectors
+template<typename T>
+inline
+T
+dist(const SGVec4<T>& v1, const SGVec4<T>& v2)
+{ return norm(v1 - v2); }
+
+/// The squared euclidean distance of the two vectors
+template<typename T>
+inline
+T
+distSqr(const SGVec4<T>& v1, const SGVec4<T>& v2)
+{ SGVec4<T> tmp = v1 - v2; return dot(tmp, tmp); }
+
#ifndef NDEBUG
template<typename T>
inline
operator<<(std::basic_ostream<char_type, traits_type>& s, const SGVec4<T>& v)
{ return s << "[ " << v(0) << ", " << v(1) << ", " << v(2) << ", " << v(3) << " ]"; }
-/// Two classes doing actually the same on different types
-typedef SGVec4<float> SGVec4f;
-typedef SGVec4<double> SGVec4d;
-
inline
SGVec4f
toVec4f(const SGVec4d& v)