3dpcp/.svn/pristine/d5/d5f254f8ffb23b548e37058c29714c428c7207d9.svn-base
2012-09-16 14:33:11 +02:00

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#include <cmath>
/**
* @file
* @brief Implementation of a 3D point.
*
* Representation of a 3D point.
* Only inline functions are used, therefore no .cc file.
*
* @author Kai Lingemann. Institute of Computer Science, University of Osnabrueck, Germany.
* @author Andreas Nuechter. Institute of Computer Science, University of Osnabrueck, Germany.
**/
/**
* Overridden "<<" operator for sending a point to a stream
*/
inline ostream& operator<<(ostream& os, const Point& p) {
os << p.x << " " << p.y << " " << p.z;
return os;
}
/**
* Overridden ">>" operator for reading a point from a stream.
* Throws a runtime error if not enough data in the stream.
*/
inline istream& operator>>(istream& is, Point& p) {
if (!is.good()) throw runtime_error("Not enough elements to read for >>(istream&, Point).1");
is >> p.x;
if (!is.good()) throw runtime_error("Not enough elements to read for >>(istream&, Point).2");
is >> p.y;
if (!is.good()) throw runtime_error("Not enough elements to read for >>(istream&, Point).3");
is >> p.z;
return is;
}
/**
* Transforms a point by the given transformation.
* @param *alignxf The transformation (4x4 matrix)
*/
inline void Point::transform(const double *alignxf)
{
double x_neu, y_neu, z_neu;
x_neu = x * alignxf[0] + y * alignxf[4] + z * alignxf[8];
y_neu = x * alignxf[1] + y * alignxf[5] + z * alignxf[9];
z_neu = x * alignxf[2] + y * alignxf[6] + z * alignxf[10];
x = x_neu + alignxf[12];
y = y_neu + alignxf[13];
z = z_neu + alignxf[14];
}
/**
* Calculates the difference between two points.
* @param p The second point
*/
inline double Point::distance(const Point &p)
{
double distance;
distance = (p.x - x)*(p.x - x) + (p.y - y)*(p.y - y) + (p.z - z)*(p.z - z);
return sqrt(distance);
}