PointVectorOperators.h

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/*
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   The MIT License

   Copyright (c) 2009 Scientific Computing and Imaging Institute,
   University of Utah.

   
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///////////////////////////
// PORTED SCIRUN v4 CODE //
///////////////////////////

/// @todo Documentation Core/GeometryPrimitives/PointVectorOperators.h

#ifndef CORE_GEOMETRY_POINTVECTOROPERATORS_H
#define CORE_GEOMETRY_POINTVECTOROPERATORS_H

#include <Core/GeometryPrimitives/Point.h>
#include <Core/GeometryPrimitives/Vector.h>
#include <Core/GeometryPrimitives/share.h>

namespace SCIRun {
namespace Core {
namespace Geometry {

  inline Point& Point::operator+=(const Vector& v)
  {
    d_[0]+=v.d_[0];
    d_[1]+=v.d_[1];
    d_[2]+=v.d_[2];
    return *this;
  }

  inline Point& Point::operator-=(const Vector& v)
  {
    d_[0]-=v.d_[0];
    d_[1]-=v.d_[1];
    d_[2]-=v.d_[2];
    return *this;
  }

  inline Vector::Vector(const Point& p)
  {
    d_[0] = p[0];
    d_[1] = p[1]; 
    d_[2] = p[2];
  }

  inline Vector Point::operator+(const Point& p) const
  {
    return Vector(d_[0]+p.d_[0], d_[1]+p.d_[1], d_[2]+p.d_[2]);
  }

  inline Vector Point::operator-(const Point& p) const
  {
    return Vector(d_[0]-p.d_[0], d_[1]-p.d_[1], d_[2]-p.d_[2]);
  }

  inline Point Point::operator+(const Vector& v) const
  {
    return Point(d_[0]+v.d_[0], d_[1]+v.d_[1], d_[2]+v.d_[2]);
  }

  inline Point Point::operator-(const Vector& v) const
  {
    return Point(d_[0]-v.d_[0], d_[1]-v.d_[1], d_[2]-v.d_[2]);
  }

  inline double Dot(const Vector& v1, const Vector& v2)
  {
    return v1.d_[0]*v2.d_[0]+v1.d_[1]*v2.d_[1]+v1.d_[2]*v2.d_[2];
  }

  inline double Dot(const Vector& v, const Point& p)
  {
    return v[0]*p[0]+v[1]*p[1]+v[2]*p[2];
  }
  inline Vector Vector::operator-(const Point& v2) const
  {
    return Vector(d_[0]-v2[0], d_[1]-v2[1], d_[2]-v2[2]);
  }


  inline Point::Point(const Vector& v)
  {
    d_[0] = v.d_[0];
    d_[1] = v.d_[1]; 
    d_[2] = v.d_[2];
  }


  inline Point& Point::operator-=(const Point& v)
  {
    d_[0]-=v.d_[0];
    d_[1]-=v.d_[1];
    d_[2]-=v.d_[2];
    return *this;
  }




  inline Point& Point::operator/=(const double d)
  {
    d_[0]/=d;
    d_[1]/=d;
    d_[2]/=d;
    return *this;
  }

  inline Point Point::operator-() const
  {
    return Point(-d_[0], -d_[1], -d_[2]);
  }

  inline Point Point::operator*(double d) const
  {
    return Point(d_[0]*d, d_[1]*d, d_[2]*d);
  }

  inline Point Point::operator/(const double d) const
  {
    return Point(d_[0]/d,d_[1]/d,d_[2]/d);
  }

  inline double& Point::operator()(int idx) 
  {
    return d_[idx];
  }

  inline double Point::operator()(int idx) const 
  {
    return d_[idx];
  }

  inline Point Interpolate(const Point& v1, const Point& v2,
    double weight)
  {
    double weight1 = 1.0 - weight;
    return Point(v2[0]*weight+v1[0]*weight1,
      v2[1]*weight+v1[1]*weight1,
      v2[2]*weight+v1[2]*weight1);
  }

  inline void Point::addscaled(const Point& p, const double scale) 
  {
    // this += p * w;
    d_[0] += p.d_[0] * scale;
    d_[1] += p.d_[1] * scale;
    d_[2] += p.d_[2] * scale;
  }

  inline double Dot(const Point& p, const Vector& v)
  {
    return p[0]*v[0]+p[1]*v[1]+p[2]*v[2];
  }

  inline double Dot(const Point& p1, const Point& p2)
  {
    return p1[0]*p2[0] + p1[1]*p2[1] + p1[2]*p2[2];
  }
}}}


#endif