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/*
Copyright 2008 Brain Research Institute, Melbourne, Australia
Written by J-Donald Tournier, 27/06/08.
This file is part of MRtrix.
MRtrix is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
MRtrix 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with MRtrix. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __point_h__
#define __point_h__
#include "mrtrix.h"
#include "math/vector.h"
namespace MR {
class Point {
public:
Point () { set (GSL_NAN, GSL_NAN, GSL_NAN); }
Point (float x, float y, float z) { set (x, y, z); }
explicit Point (const float point[3]) { set (point); }
bool operator! () const { return (gsl_isnan(p[0]) || gsl_isnan(p[1]) || gsl_isnan(p[2])); }
bool valid () const { return (!(gsl_isnan(p[0]) || gsl_isnan(p[1]) || gsl_isnan(p[2]))); }
float* get () { return (p); }
const float* get () const { return (p); }
void set (float x, float y, float z) { p[0] = x; p[1] = y; p[2] = z; }
void set (const float point[3]) { memcpy (p, point, sizeof(p)); }
void zero () { memset (p, 0, sizeof(p)); }
float norm2 () const { return (p[0]*p[0] + p[1]*p[1] + p[2]*p[2]); }
float norm () const { return (sqrt (norm2())); }
Point& normalise () { Math::normalise (p); return (*this); }
float& operator[] (int idx) { return (p[idx]); }
const float& operator[] (int idx) const { return (p[idx]); }
bool operator== (const Point& A) const { return (memcmp (p, A.p, sizeof(p)) == 0); };
bool operator!= (const Point& A) const { return (memcmp (p, A.p, sizeof(p))); };
Point operator- () const { return (Point (-p[0], -p[1], -p[2])); }
Point operator* (float M) const { return (Point (p[0]*M, p[1]*M, p[2]*M)); }
Point& operator= (const Point& A) { memcpy (p, A.p, sizeof(p)); return (*this); }
Point& operator+= (const Point& inc) { p[0] += inc[0]; p[1] += inc[1]; p[2] += inc[2]; return (*this); }
Point& operator-= (const Point& inc) { p[0] -= inc[0]; p[1] -= inc[1]; p[2] -= inc[2]; return (*this); }
Point& operator*= (float M) { p[0] *= M; p[1] *= M; p[2] *= M; return (*this); }
float dot (const Point& A) const { return (p[0]*A[0] + p[1]*A[1] + p[2]*A[2]); }
Point cross (const Point& A) const { return (Point (p[1]*A[2]-p[2]*A[1], p[2]*A[0]-p[0]*A[2], p[0]*A[1]-p[1]*A[0])); }
void invalidate () { set (GSL_NAN, GSL_NAN, GSL_NAN); }
static Point Invalid;
protected:
float p[3];
};
inline Point operator* (float M, const Point& P) { return (Point (P[0]*M, P[1]*M, P[2]*M)); }
inline Point operator+ (const Point& A, const Point& B) { return (Point (A[0]+B[0], A[1]+B[1], A[2]+B[2])); }
inline Point operator- (const Point& A, const Point& B) { return (Point (A[0]-B[0], A[1]-B[1], A[2]-B[2])); }
inline float dist2 (const Point& a, const Point& b) { return ((a-b).norm2()); }
inline float dist (const Point& a, const Point& b) { return ((a-b).norm()); }
inline std::ostream& operator<< (std::ostream& stream , const Point& pt)
{
stream << "[ " << pt[0] << " " << pt[1] << " " << pt[2] << " ]";
return (stream);
}
}
#endif
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