d3circlepartition Class Reference

#include <d3circlepartition.h>

Inheritance diagram for d3circlepartition:

Collaboration diagram for d3circlepartition:

List of all members.

Public Member Functions
	d3circlepartition ()
	d3circlepartition (pt2c _x0, double const _radius)
bool const	isInside (pt3c &x) const
bool const	intersection (pt3 &x, pt3c &w, pt3c &b) const
bool const	isOnBoundary (pt3c &w, double const zero) const
Public Attributes
pt2	x0
double	radius

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Detailed Description

Definition at line 12 of file d3circlepartition.h.

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Constructor & Destructor Documentation

d3circlepartition::d3circlepartition

(

)

[inline]

Definition at line 19 of file d3circlepartition.h.

    : radius(1.0) {}

d3circlepartition::d3circlepartition	(	pt2c	_x0,
		double const	_radius
	)			[inline]

Definition at line 22 of file d3circlepartition.h.

    : x0(_x0), radius(_radius) {}

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Member Function Documentation

bool const d3circlepartition::intersection	(	pt3 &	x,
		pt3c &	w,
		pt3c &	b
	)			const

Definition at line 7 of file d3circlepartition.cpp.

References point2< T >::dot(), solvequadratic(), point3< T >::x, and point3< T >::y.

{
  pt2c w2(w.x-x0.x,w.y-x0.y);
  pt2c b2(b.x-x0.x,b.y-x0.y);

  pt2c b3(b2-w2);
  double const q0 = b3.dot();
  double const q1 = w2.dot(b3)*2.0;
  double const q2 = w2.dot()-radius*radius;

  double t0;
  double t1;
  bool res = solvequadratic(t0,t1,q0,q1,q2);
  if (res==false)
    return false;

  double t = -1;
  if ((t0>=0.0) && (t0<=1.0))
    t = t0;
  if ((t1>=0.0) && (t1<=1.0))
    t = t1; 
  x = w + (b-w)*t;

  if (t==-1)
    return false;
 
  return true; 
}

bool const d3circlepartition::isInside

(

pt3c &

x

)

const [inline]

Definition at line 25 of file d3circlepartition.h.

References point2< T >::dot(), radius, point3< T >::x, x0, and point3< T >::y.

  {
    pt2 z(x.x,x.y);
    z -= x0;
    return z.dot() < radius*radius;
  }

bool const d3circlepartition::isOnBoundary	(	pt3c &	w,
		double const	zero
	)			const

Definition at line 41 of file d3circlepartition.cpp.

References point2< T >::dot(), point3< T >::x, and point3< T >::y.

{
  pt2c z(w.x-x0.x,w.y-x0.y);
  double const d = z.dot() - radius*radius;

  if (0 < (d + zero))
  {
    //if ( zero + d < zero + zero )
    if ( d < zero )
      return true;
  }

  return false;
}

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Member Data Documentation

double d3circlepartition::radius

Definition at line 17 of file d3circlepartition.h.

Referenced by d3circlepartitiondraw::draw(), and isInside().

pt2 d3circlepartition::x0

Definition at line 16 of file d3circlepartition.h.

Referenced by d3circlepartitiondraw::draw(), isInside(), and d3circlepartitiondraw::translate().

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The documentation for this class was generated from the following files:

• clipping/d3circlepartition.h
• clipping/d3circlepartition.cpp