lar_content::BdtBeamParticleIdTool::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 &point, const pandora::CartesianVector &direction) 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...
double	m_d
	Parameter defining a plane. More...

Detailed Description

Plane class.

Definition at line 58 of file BdtBeamParticleIdTool.h.

Constructor & Destructor Documentation

lar_content::BdtBeamParticleIdTool::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 353 of file BdtBeamParticleIdTool.cc.

References m_unitNormal.

                                                                                             :
    m_unitNormal(0.f, 0.f, 0.f),
    m_point(point),
    m_d(-1. * static_cast<double>(normal.GetDotProduct(point)))
{
    try
    {
        m_unitNormal = normal.GetUnitVector();
    }
    catch (const StatusCodeException &statusCodeException)
    {
        std::cout << "BdtBeamParticleIdTool::Plane::Plane - normal vector to plane has a magnitude of zero" << std::endl;
        throw statusCodeException;
    }
}

Member Function Documentation

CartesianVector lar_content::BdtBeamParticleIdTool::Plane::GetLineIntersection	(	const pandora::CartesianVector &	point,
		const pandora::CartesianVector &	direction
	)		const

Return the intersection between the plane and a line.

Parameters

point	a point on the line
direction	vector pointing along the line

Definition at line 371 of file BdtBeamParticleIdTool.cc.

References m_d, and m_unitNormal.

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

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

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

    const double t(-1. * (static_cast<double>(point.GetDotProduct(m_unitNormal)) + m_d) / static_cast<double>(denominator));
    return (point + (direction * t));
}

Member Data Documentation

double lar_content::BdtBeamParticleIdTool::Plane::m_d

private

Parameter defining a plane.

Definition at line 80 of file BdtBeamParticleIdTool.h.

Referenced by GetLineIntersection().

pandora::CartesianVector lar_content::BdtBeamParticleIdTool::Plane::m_point

private

A point on the plane.

Definition at line 79 of file BdtBeamParticleIdTool.h.

pandora::CartesianVector lar_content::BdtBeamParticleIdTool::Plane::m_unitNormal

private

Unit normal to plane.

Definition at line 78 of file BdtBeamParticleIdTool.h.

Referenced by GetLineIntersection(), and Plane().

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

• larpandoracontent/v04_08_01/source/larpandoracontent/LArControlFlow/BdtBeamParticleIdTool.h
• larpandoracontent/v04_08_01/source/larpandoracontent/LArControlFlow/BdtBeamParticleIdTool.cc