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