GreatCircleArc Class Reference

#include <GreatCircles.h>

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 coorinate 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 67 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 69 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	lattiude of the first point in degrees.
startLong	longitude of the first point in degrees.
endLat	lattide 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 73 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 221 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 426 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 coorinate on the panorama.

This is an approximation, but should be reasonable.

Definition at line 465 of file GreatCircles.cpp.

References m_lines, and celeste::max().

Member Data Documentation

std::vector<LineSegment> GreatCircleArc::m_lines

protected

Definition at line 111 of file GreatCircles.h.

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

VisualizationState* GreatCircleArc::m_visualizationState

protected

Definition at line 112 of file GreatCircles.h.

Referenced by draw(), and GreatCircleArc().

double GreatCircleArc::m_xscale

Definition at line 90 of file GreatCircles.h.

Referenced by getxscale(), and GreatCircleArc().

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

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