lar_content::BeamParticleIdTool::Plane Class Reference

Plane class. More...

Public Member Functions
	Plane (const pandora::CartesianVector &normal, const pandora::CartesianVector &point)
	Constructor, using equation of plane: m_a*x + m_b*y + m_c*z + m_d = 0. More...
pandora::CartesianVector	GetLineIntersection (const pandora::CartesianVector &a0, const pandora::CartesianVector &a) const
	Return the intersection between the plane and a line. More...

Private Attributes
pandora::CartesianVector	m_unitNormal
	Unit normal to plane. More...
pandora::CartesianVector	m_point
	A point on the plane. More...
float	m_d
	Parameter defining a plane. More...

Detailed Description

Plane class.

Definition at line 34 of file BeamParticleIdTool.h.

Constructor & Destructor Documentation

lar_content::BeamParticleIdTool::Plane::Plane	(	const pandora::CartesianVector &	normal,
		const pandora::CartesianVector &	point
	)

Constructor, using equation of plane: m_a*x + m_b*y + m_c*z + m_d = 0.

Parameters

normal	a Cartesian vector that points in a direction that is normal to the plane
point	a Cartesian vector that corresponds to any point on the plane

Definition at line 257 of file BeamParticleIdTool.cc.

                                                                                          :
    m_unitNormal(normal.GetUnitVector()),
    m_point(point),
    m_d(-1.f * (normal.GetDotProduct(point)))
{
}

Member Function Documentation

CartesianVector lar_content::BeamParticleIdTool::Plane::GetLineIntersection	(	const pandora::CartesianVector &	a0,
		const pandora::CartesianVector &	a
	)		const

Return the intersection between the plane and a line.

Parameters

a0	point on the line
a	vector pointing along the line

Definition at line 266 of file BeamParticleIdTool.cc.

{
    if (std::fabs(a.GetDotProduct(m_unitNormal)) < std::numeric_limits<float>::min())
        return CartesianVector(std::numeric_limits<float>::max(), std::numeric_limits<float>::max(), std::numeric_limits<float>::max());

    const float denominator(a.GetDotProduct(m_unitNormal));

    if (std::fabs(denominator) < std::numeric_limits<float>::epsilon())
        throw StatusCodeException(STATUS_CODE_OUT_OF_RANGE);

    const float t(-1.f * (a0.GetDotProduct(m_unitNormal) + m_d) / denominator);
    return (a0 + (a * t));
}

Member Data Documentation

float lar_content::BeamParticleIdTool::Plane::m_d

private

Parameter defining a plane.

Definition at line 56 of file BeamParticleIdTool.h.

pandora::CartesianVector lar_content::BeamParticleIdTool::Plane::m_point

private

A point on the plane.

Definition at line 55 of file BeamParticleIdTool.h.

pandora::CartesianVector lar_content::BeamParticleIdTool::Plane::m_unitNormal

private

Unit normal to plane.

Definition at line 54 of file BeamParticleIdTool.h.

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

• BeamParticleIdTool.h
• BeamParticleIdTool.cc