GreatCircleArc Class Reference

#include <GreatCircles.h>

Inheritance diagram for GreatCircleArc:

Classes
struct	LineSegment

Public Member Functions
	GreatCircleArc ()
	Create a bad great circle arc. More...
	GreatCircleArc (double startLat, double startLong, double endLat, double endLong, VisualizationState &m_visualizationState)
	Create a great circle arc. More...
void	draw (bool withCross=true, double width=1.0) const
	Draw the great circle arc on the fast preview. More...
float	squareDistance (hugin_utils::FDiff2D point) const
	Return the square of the minimal distance between the great circle arc and a coordinate on the panorama. More...
double	getxscale () const

Public Attributes
double	m_xscale

Protected Attributes
std::vector< LineSegment >	m_lines
VisualizationState *	m_visualizationState

Detailed Description

Definition at line 68 of file GreatCircles.h.

Constructor & Destructor Documentation

GreatCircleArc::GreatCircleArc

(

)

Create a bad great circle arc.

draw() won't do anything and squareDistance() will return the maximum float.

Definition at line 76 of file GreatCircles.cpp.

Referenced by GreatCircleArc().

GreatCircleArc::GreatCircleArc	(	double	startLat,
		double	startLong,
		double	endLat,
		double	endLong,
		VisualizationState &	m_visualizationState
	)

Create a great circle arc.

Parameters

startLat	latitude of the first point in degrees.
startLong	longitude of the first point in degrees.
endLat	latitude of the second point in degrees.
endLong	longitude of the second point in degrees.

Handle case where the points are opposite sides of the sphere (i.e. The angle startLat is -endLat and startLong is -endLong.) There are infinetly many great circles in this case, we pick one going through (180, 90), by splitting the problem in two.

Todo:

don't check the +/- 180 degree boundary when projection does not break there.

Definition at line 80 of file GreatCircles.cpp.

References HuginBase::PTools::Transform::createInvTransform(), HuginBase::BaseSrcPanoImage::EQUIRECTANGULAR, VisualizationState::GetOptions(), VisualizationState::GetScale(), HuginBase::PanoramaOptions::getWidth(), GreatCircleArc(), celeste::line, m_lines, M_PI, m_visualizationState, m_xscale, celeste::max(), max_segments, celeste::min(), min_segment_angle, hugin_utils::roundi(), HuginBase::PTools::Transform::transformImgCoord(), and GreatCircleArc::LineSegment::vertices.

Member Function Documentation

void GreatCircleArc::draw	(	bool	withCross = true,
		double	width = 1.0
	)		const

Draw the great circle arc on the fast preview.

Definition at line 227 of file GreatCircles.cpp.

References getxscale(), m_lines, and m_visualizationState.

Referenced by PreviewLayoutLinesTool::LineDetails::draw(), and GreatCircles::drawLineFromSpherical().

double GreatCircleArc::getxscale

(

void

)

const

Definition at line 427 of file GreatCircles.cpp.

References m_xscale.

Referenced by draw().

float GreatCircleArc::squareDistance

(

hugin_utils::FDiff2D

point

)

const

Return the square of the minimal distance between the great circle arc and a coordinate on the panorama.

This is an approximation, but should be reasonable.

Definition at line 466 of file GreatCircles.cpp.

References m_lines, and celeste::max().

Member Data Documentation

std::vector<LineSegment> GreatCircleArc::m_lines

protected

Definition at line 112 of file GreatCircles.h.

Referenced by draw(), GreatCircleArc(), squareDistance(), and StraightLineFromSphericals::StraightLineFromSphericals().

VisualizationState* GreatCircleArc::m_visualizationState

protected

Definition at line 113 of file GreatCircles.h.

Referenced by draw(), GreatCircleArc(), and StraightLineFromSphericals::StraightLineFromSphericals().

double GreatCircleArc::m_xscale

Definition at line 91 of file GreatCircles.h.

Referenced by getxscale(), GreatCircleArc(), and StraightLineFromSphericals::StraightLineFromSphericals().

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

• hugin1/hugin/GreatCircles.h
• hugin1/hugin/GreatCircles.cpp