circleD2< PT, PD > Class Template Reference

Circle and OBB intersection. More...

#include <circleD2.h>

Inheritance diagram for circleD2< PT, PD >:

Collaboration diagram for circleD2< PT, PD >:

List of all members.

Public Member Functions
	circleD2 (PT const &center_, PD const radius_)
	Construct a circle.
boolc	intersects (boxOBBhalfspaceD2< PT, PD > &B)
	Do the circle and box intersect?
Public Attributes
PT	center
	The circles center.
PD	radius
	Circles radius.

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Detailed Description

template<typename PT, typename PD>
class circleD2< PT, PD >

Circle and OBB intersection.

Definition at line 12 of file circleD2.h.

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Constructor & Destructor Documentation

template<typename PT, typename PD>

circleD2< PT, PD >::circleD2	(	PT const &	center_,
		PD const	radius_
	)			[inline]

Construct a circle.

Definition at line 23 of file circleD2.h.

    : center(center_), radius(radius_) {}

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Member Function Documentation

template<typename PT, typename PD>

boolc circleD2< PT, PD >::intersects

(

boxOBBhalfspaceD2< PT, PD > &

B

)

[inline]

Do the circle and box intersect?

Definition at line 37 of file circleD2.h.

References circleD2< PT, PD >::center, boxOBBhalfspaceD2< PT, PD >::cornerpoints(), line< PT, PD >::nearestpointcapped(), line< PT, PD >::nml, line< PT, PD >::pos, and circleD2< PT, PD >::radius.

Referenced by circleD2test::update01().

{
  PT pi[4];
  B.cornerpoints(pi[0],pi[1],pi[2],pi[3]);

  PD t;

  bool inside=true;
  for (uint i=0; i<4; ++i)
  {
    line<PT,PD> L(pi[(i+1)%4],pi[i],true);
    PT normal(-L.nml.y,L.nml.x);
    if (normal.dot(center-L.pos)>=0.0)
    {
      inside=false;

      L.nearestpointcapped(t,center);
      if ((L(t)-center).dot()<=radius*radius)
        return true;
    }
  }

  return inside;
}

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Member Data Documentation

template<typename PT, typename PD>

PT circleD2< PT, PD >::center

The circles center.

Definition at line 17 of file circleD2.h.

Referenced by circleD2< PT, PD >::intersects(), circleD2test::keyboard01(), and circleD2test::update01().

template<typename PT, typename PD>

PD circleD2< PT, PD >::radius

Circles radius.

Definition at line 19 of file circleD2.h.

Referenced by circleD2< PT, PD >::intersects(), and circleD2test::update01().

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

• intersectiontests/circleD2.h