Define shapes and provide utilities for targets stored as Isis3 maps. More...

#include <DemShape.h>

Inherited by Isis::EquatorialCylindricalShape.

Public Member Functions
	DemShape (Target *target, Pvl &pvl)
	Construct a DemShape object. More...

	DemShape ()
	Construct a DemShape object. More...

	~DemShape ()
	Destroys the DemShape. More...

bool	intersectSurface (std::vector< double > observerPos, std::vector< double > lookDirection)
	Find the intersection point with the DEM. More...

Distance	localRadius (const Latitude &lat, const Longitude &lon)
	Gets the radius from the DEM, if we have one. More...

double	demScale ()
	Return the scale of the DEM shape, in pixels per degree. More...

virtual void	calculateDefaultNormal ()
	This method calculates the default normal (Ellipsoid for backwards compatability) for the DemShape. More...

bool	isDEM () const
	Indicates that this shape model is from a DEM. More...

void	calculateLocalNormal (QVector< double * > cornerNeighborPoints)
	This method calculates the local surface normal of the current intersection point. More...

void	calculateSurfaceNormal ()
	This method calculates the surface normal of the current intersection point. More...

void	Initialize ()
	Initializes the ShapeModel private variables. More...

SurfacePoint *	surfaceIntersection () const
	Returns the surface intersection for this ShapeModel. More...

bool	hasIntersection ()
	Returns intersection status. More...

bool	hasNormal () const
	Returns surface point normal status. More...

void	clearSurfacePoint ()
	Clears or resets the current surface point. More...

virtual double	emissionAngle (const std::vector< double > &sB)
	Computes and returns emission angle, in degrees, given the observer position. More...

virtual double	incidenceAngle (const std::vector< double > &uB)
	Computes and returns incidence angle, in degrees, given the illuminator position. More...

virtual double	phaseAngle (const std::vector< double > &sB, const std::vector< double > &uB)
	Computes and returns phase angle, in degrees, given the positions of the observer and illuminator. More...

QString	name () const
	Gets the shape name. More...

void	setHasIntersection (bool b)
	Sets the flag to indicate whether this ShapeModel has an intersection. More...

void	setSurfacePoint (const SurfacePoint &surfacePoint)
	Set surface intersection point. More...

std::vector< double >	normal ()
	Returns the local surface normal at the current intersection point. More...

Protected Member Functions
Cube *	demCube ()
	Returns the cube defining the shape model. More...

void	setNormal (const std::vector< double >)
	Sets the normal for the currect intersection point. More...

void	setNormal (const double a, const double b, const double c)
	Sets the normal for the currect intersection point. More...

void	setName (QString name)
	Sets the shape name. More...

void	calculateEllipsoidalSurfaceNormal ()
	Calculates the ellipsoidal surface normal. More...

bool	hasEllipsoidIntersection ()
	Returns the status of the ellipsoid model intersection. More...

bool	intersectEllipsoid (const std::vector< double > observerPosRelativeToTarget, const std::vector< double > &observerLookVectorToTarget)
	Finds the intersection point on the ellipsoid model using the given position of the observer (spacecraft) and direction vector from the observer to the target (body). More...

bool	hasValidTarget () const
	Returns the status of the target. More...

std::vector< Distance >	targetRadii () const
	Returns the radii of the body in km. More...

void	setHasNormal (bool status)
	Sets the flag to indicate whether this ShapeModel has a surface normal. More...

double	resolution ()
	Convenience method to get pixel resolution (m/pix) at current intersection point. More...

Detailed Description

Define shapes and provide utilities for targets stored as Isis3 maps.

This class will define shapes of Isis3 target bodies with the shape defined by an ISIS 3 map fille (level 2 image), as well as provide utilities to retrieve radii and photometric information for the intersection point.

Author: 2010-07-30 Debbie A. Cook

Constructor & Destructor Documentation

Isis::DemShape::DemShape	(	Target *	target,
		Pvl &	pvl
	)

Construct a DemShape object.

This method creates a ShapeModel object named "DemShape" and initializes member variables from the projection shape model using the given Target and Pvl.

Parameters

target	Pointer to a valid target.
pvl	Valid ISIS cube label.

References Isis::Cube::addCachingAlgorithm(), Isis::Interpolator::BiLinearType, Isis::PvlObject::findGroup(), Isis::PvlContainer::hasKeyword(), Isis::Interpolator::HotLine(), Isis::Interpolator::HotSample(), Isis::Cube::label(), Isis::Interpolator::Lines(), Isis::CubeManager::Open(), Isis::Cube::pixelType(), Isis::Cube::projection(), Isis::Interpolator::Samples(), Isis::ShapeModel::setName(), and Isis::PvlObject::Traverse.

Isis::DemShape::DemShape ( )

Construct a DemShape object.

This method creates a ShapeModel object named "DemShape". The member variables are set to Null.

References Isis::ShapeModel::setName().

Isis::DemShape::~DemShape ( )

Destroys the DemShape.

Member Function Documentation

void Isis::DemShape::calculateDefaultNormal ( )

virtual

This method calculates the default normal (Ellipsoid for backwards compatability) for the DemShape.

Implements Isis::ShapeModel.

References Isis::ShapeModel::calculateEllipsoidalSurfaceNormal().

void Isis::ShapeModel::calculateEllipsoidalSurfaceNormal ( )

protectedinherited

Calculates the ellipsoidal surface normal.

References _FILEINFO_.

Referenced by Isis::EllipsoidShape::calculateDefaultNormal(), calculateDefaultNormal(), Isis::EllipsoidShape::calculateSurfaceNormal(), and calculateSurfaceNormal().

void Isis::DemShape::calculateLocalNormal ( QVector< double * > neighborPoints )

virtual

This method calculates the local surface normal of the current intersection point.

Parameters

neighborPoints

Implements Isis::ShapeModel.

References Isis::ShapeModel::normal(), Isis::ShapeModel::setHasNormal(), Isis::ShapeModel::setNormal(), Isis::ShapeModel::surfaceIntersection(), and Isis::SurfacePoint::ToNaifArray().

void Isis::DemShape::calculateSurfaceNormal ( )

virtual

This method calculates the surface normal of the current intersection point.

Implements Isis::ShapeModel.

References Isis::ShapeModel::calculateEllipsoidalSurfaceNormal().

void Isis::ShapeModel::clearSurfacePoint ( )

inherited

Clears or resets the current surface point.

Referenced by Isis::Sensor::SetGround(), Isis::Camera::SetGround(), Isis::Camera::SetImage(), Isis::Sensor::setTime(), Isis::Sensor::SetUniversalGround(), and Isis::Camera::SetUniversalGround().

Cube * Isis::DemShape::demCube ( )

protected

Returns the cube defining the shape model.

Returns the DEM Cube object.

Returns: Cube* A pointer to the DEM cube associated with this shape model.

Referenced by Isis::EquatorialCylindricalShape::EquatorialCylindricalShape().

double Isis::DemShape::demScale ( )

Return the scale of the DEM shape, in pixels per degree.

Returns: double The scale of the DEM.

Referenced by Isis::EquatorialCylindricalShape::intersectSurface().

double Isis::ShapeModel::emissionAngle ( const std::vector< double > & observerBodyFixedPosition )

virtualinherited

Computes and returns emission angle, in degrees, given the observer position.

Emission Angle: The angle between the surface normal vector at the intersection point and the vector from the intersection point to the observer (usually the spacecraft). The emission angle varies from 0 degrees when the observer is viewing the sub-spacecraft point (nadir viewing) to 90 degrees when the intercept is tangent to the surface of the target body. Thus, higher values of emission angle indicate more oblique viewing of the target.

Parameters

observerBodyFixedPosition Three dimensional position of the observer, in the coordinate system of the target body.

Returns: The emission angle, in decimal degrees.

Reimplemented in Isis::PlaneShape.

References Isis::RAD2DEG().

Referenced by Isis::Sensor::EmissionAngle().

bool Isis::ShapeModel::hasEllipsoidIntersection ( )

protectedinherited

Returns the status of the ellipsoid model intersection.

Returns: bool Indicates whether this shape model has a valid ellipsoid intersection.

bool Isis::ShapeModel::hasIntersection ( )

inherited

Returns intersection status.

Returns: bool Indicates whether this ShapeModel has an intersection.

Referenced by Isis::EllipsoidShape::calculateLocalNormal(), Isis::NaifDskShape::calculateLocalNormal(), Isis::NaifDskShape::ellipsoidNormal(), Isis::Camera::GetLocalNormal(), Isis::Sensor::HasSurfaceIntersection(), Isis::EquatorialCylindricalShape::intersectSurface(), intersectSurface(), and Isis::NaifDskShape::setLocalNormalFromIntercept().

bool Isis::ShapeModel::hasNormal ( ) const

inherited

Returns surface point normal status.

Returns: Indicates whether this ShapeModel has a surface normal.

Referenced by Isis::Camera::GetLocalNormal().

bool Isis::ShapeModel::hasValidTarget ( ) const

protectedinherited

Returns the status of the target.

If it is NULL, this method returns false.

Returns: Indicates whether the target is valid.

Referenced by Isis::NaifDskShape::ellipsoidNormal().

double Isis::ShapeModel::incidenceAngle ( const std::vector< double > & illuminatorBodyFixedPosition )

virtualinherited

Computes and returns incidence angle, in degrees, given the illuminator position.

Incidence Angle: The angle between the surface normal vector at the intersection point and the vector from the intersection point to the illuminator (usually the sun).

Note: this method does not use the surface model.

Parameters

illuminatorBodyFixedPosition Three dimensional position for the illuminator, in the body-fixed coordinate system.

Returns: double Incidence angle, in degrees.

Reimplemented in Isis::PlaneShape.

References Isis::RAD2DEG().

Referenced by Isis::Sensor::IncidenceAngle().

void Isis::ShapeModel::Initialize ( )

inherited

Initializes the ShapeModel private variables.

bool Isis::ShapeModel::intersectEllipsoid	(	const std::vector< double >	observerBodyFixedPosition,
		const std::vector< double > &	observerLookVectorToTarget
	)

protectedinherited

Finds the intersection point on the ellipsoid model using the given position of the observer (spacecraft) and direction vector from the observer to the target (body).

Parameters

observerBodyFixedPosition	Three dimensional position of the observer, in the coordinate system of the target body.
observerLookVectorToTarget	Three dimensional direction vector from the observer to the target.

Returns: bool Indicates whether this shape model found a valid ellipsoid intersection.

Referenced by Isis::EllipsoidShape::intersectSurface(), and intersectSurface().

bool Isis::DemShape::intersectSurface	(	std::vector< double >	observerPos,
		std::vector< double >	lookDirection
	)

virtual

Find the intersection point with the DEM.

TIDBIT: From the code below we have historically tested to see if we can first intersect the ellipsoid. If not then we assumed that we could not intersect the DEM. This of course isn't always true as the DEM could be above the surface of the ellipsoid. For most images we really wouldn't notice. It has recently (Aug 2011) come into play trying to intersect images containing a limb and spiceinit'ed with a DEM (e.g., Vesta and soon Mercury). This implies that info at the limb will not always be computed. In the future we may want to do a better job handling this special case.

Parameters

observerPos
lookDirection

Returns: bool Indicates whether the intersection was found.

Implements Isis::ShapeModel.

Reimplemented in Isis::EquatorialCylindricalShape.

References Isis::NaifStatus::CheckErrors(), Isis::Angle::Degrees, Isis::SurfacePoint::FromNaifArray(), Isis::SurfacePoint::GetX(), Isis::SurfacePoint::GetY(), Isis::SurfacePoint::GetZ(), Isis::ShapeModel::hasIntersection(), Isis::ShapeModel::intersectEllipsoid(), Isis::IsSpecial(), Isis::Displacement::kilometers(), Isis::Distance::kilometers(), localRadius(), Isis::RAD2DEG(), Isis::ShapeModel::resolution(), Isis::ShapeModel::setHasIntersection(), and Isis::ShapeModel::surfaceIntersection().

Referenced by Isis::EquatorialCylindricalShape::intersectSurface().

bool Isis::DemShape::isDEM ( ) const

virtual

Indicates that this shape model is from a DEM.

Since this method returns true for this class, the Camera class will calculate the local normal using neighbor points. This method is pure virtual and must be implemented by all DemShape classes. This parent implementation returns true.

Returns: bool Indicates that this is a DEM shape model.

Implements Isis::ShapeModel.

Distance Isis::DemShape::localRadius	(	const Latitude &	lat,
		const Longitude &	lon
	)

virtual

Gets the radius from the DEM, if we have one.

Parameters

lat	Latitude
lon	Longitude

Returns: Distance Local radius from the DEM

Implements Isis::ShapeModel.

References Isis::Angle::degrees(), Isis::Buffer::DoubleBuffer(), Isis::Interpolator::Interpolate(), Isis::Angle::isValid(), Isis::Distance::Meters, Isis::Cube::read(), Isis::Portal::SetPosition(), Isis::Projection::SetUniversalGround(), Isis::Projection::WorldX(), and Isis::Projection::WorldY().

Referenced by Isis::EquatorialCylindricalShape::intersectSurface(), and intersectSurface().

QString Isis::ShapeModel::name ( ) const

inherited

Gets the shape name.

Returns: QString The name of the ShapeModel.

Referenced by Isis::UniversalGroundMap::GroundRange(), Isis::VimsGroundMap::SetGround(), and Isis::Camera::SetGround().

std::vector< double > Isis::ShapeModel::normal ( )

inherited

Returns the local surface normal at the current intersection point.

Note: This method will throw an error if the normal doesn't exist. Use the hasNormal() method to verify before calling this method.

See Also: hasNormal()

Returns: A surface normal vector, if it exists.

References _FILEINFO_.

Referenced by Isis::EllipsoidShape::calculateLocalNormal(), calculateLocalNormal(), and Isis::Camera::GetLocalNormal().

double Isis::ShapeModel::phaseAngle	(	const std::vector< double > &	observerBodyFixedPosition,
		const std::vector< double > &	illuminatorBodyFixedPosition
	)

virtualinherited

Computes and returns phase angle, in degrees, given the positions of the observer and illuminator.

Phase Angle: The angle between the vector from the intersection point to the observer (usually the spacecraft) and the vector from the intersection point to the illuminator (usually the sun).

Parameters

observerBodyFixedPosition	Three dimensional position of the observer, in the coordinate system of the target body.
illuminatorBodyFixedPosition	Three dimensional position for the illuminator, in the body-fixed coordinate system.

Returns: double Phase angle, in degrees.

References Isis::RAD2DEG().

Referenced by Isis::Sensor::PhaseAngle().

double Isis::ShapeModel::resolution ( )

protectedinherited

Convenience method to get pixel resolution (m/pix) at current intersection point.

Returns: The pixel resolution at the surface intersection.

References _FILEINFO_.

Referenced by intersectSurface().

void Isis::ShapeModel::setHasIntersection ( bool b )

inherited

Sets the flag to indicate whether this ShapeModel has an intersection.

Parameters

b	Indicates whether there is an intersection.

Referenced by Isis::EquatorialCylindricalShape::intersectSurface(), intersectSurface(), Isis::PlaneShape::intersectSurface(), and Isis::Sensor::SetLookDirection().

void Isis::ShapeModel::setHasNormal ( bool status )

protectedinherited

Sets the flag to indicate whether this ShapeModel has a surface normal.

Parameters

b	Indicates whether there is a normal.

Referenced by Isis::EllipsoidShape::calculateLocalNormal(), and calculateLocalNormal().

void Isis::ShapeModel::setName ( QString name )

protectedinherited

Sets the shape name.

Parameters

name	The name of the ShapeModel.

Referenced by DemShape(), Isis::EllipsoidShape::EllipsoidShape(), Isis::EquatorialCylindricalShape::EquatorialCylindricalShape(), Isis::NaifDskShape::NaifDskShape(), and Isis::PlaneShape::PlaneShape().

void Isis::ShapeModel::setNormal ( const std::vector< double > normal )

protectedinherited

Sets the normal for the currect intersection point.

Note: This method will throw an error if this ShapeModel doesn't have and intersection. Use the hasIntersection() method to verify before calling this method.

See Also: hasIntersection()

Parameters

normal Three dimensional surface normal vector.

References _FILEINFO_.

Referenced by Isis::EllipsoidShape::calculateLocalNormal(), calculateLocalNormal(), Isis::NaifDskShape::calculateSurfaceNormal(), Isis::PlaneShape::intersectSurface(), and Isis::NaifDskShape::setLocalNormalFromIntercept().

void Isis::ShapeModel::setNormal	(	const double	a,
		const double	b,
		const double	c
	)

protectedinherited

Sets the normal for the currect intersection point.

Note: This method will throw an error if this ShapeModel doesn't have and intersection. Use the hasIntersection() method to verify before calling this method.

See Also: hasIntersection()

Parameters

a	First coordinate value for the three dimensional surface normal.
b	Second coordinate value for the three dimensional surface normal.
c	Third coordinate value for the three dimensional surface normal.

References _FILEINFO_.

void Isis::ShapeModel::setSurfacePoint ( const SurfacePoint & surfacePoint )

inherited

Set surface intersection point.

Parameters

surfacePoint Position coordinate for the surface point.

Referenced by Isis::NaifDskShape::intersectSurface(), Isis::RadarGroundMap::SetGround(), and Isis::Sensor::SetGround().

SurfacePoint * Isis::ShapeModel::surfaceIntersection ( ) const

inherited

Returns the surface intersection for this ShapeModel.

Returns: SurfacePoint Three dimensional position for the surface intersection, in body-fixed coordinate system.

Referenced by Isis::EllipsoidShape::calculateLocalNormal(), calculateLocalNormal(), Isis::Sensor::Coordinate(), Isis::NaifDskShape::ellipsoidNormal(), Isis::PlaneShape::emissionAngle(), Isis::Sensor::GetLatitude(), Isis::Sensor::GetLongitude(), Isis::Sensor::GetSurfacePoint(), Isis::PlaneShape::incidenceAngle(), Isis::EquatorialCylindricalShape::intersectSurface(), intersectSurface(), Isis::PlaneShape::intersectSurface(), Isis::PlaneShape::localRadius(), Isis::Sensor::LocalRadius(), Isis::Sensor::SetUniversalGround(), Isis::Sensor::SlantDistance(), and Isis::Sensor::SolarDistance().

std::vector< Distance > Isis::ShapeModel::targetRadii ( ) const

protectedinherited

Returns the radii of the body in km.

The radii are obtained from the target. Note: This method will throw an error if the ShapeModel does not have a valid target. Use the hasValidTarget() method to verify before calling this method.

See Also: hasValidTarget()

Returns: Three dimensional vector containing the ellipsoid radii values.

References _FILEINFO_.

Referenced by Isis::EllipsoidShape::calculateLocalNormal(), Isis::NaifDskShape::ellipsoidNormal(), Isis::EquatorialCylindricalShape::intersectSurface(), and Isis::EllipsoidShape::localRadius().

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

src/base/objs/DemShape/DemShape.h
src/base/objs/DemShape/DemShape.cpp

Public Member Functions

Protected Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation