A special case of SphericalPolygon for which the polygon is convex. More...

#include <StelSphereGeometry.hpp>

Public Member Functions
	SphericalConvexPolygon ()
	Default constructor.

	SphericalConvexPolygon (const QVector< QVector< Vec3d > > &contours)
	Constructor from a list of contours.

	SphericalConvexPolygon (const QVector< Vec3d > &contour)
	Constructor from one contour.

	SphericalConvexPolygon (const Vec3d &e0, const Vec3d &e1, const Vec3d &e2)
	Special constructor for triangle.

	SphericalConvexPolygon (const Vec3d &e0, const Vec3d &e1, const Vec3d &e2, const Vec3d &e3)
	Special constructor for quads.

virtual SphericalRegionType	getType () const

virtual OctahedronPolygon	getOctahedronPolygon () const
	Return the octahedron contour representation of the polygon. More...

virtual StelVertexArray	getFillVertexArray () const
	Return an openGL compatible array to be displayed using vertex arrays.

virtual StelVertexArray	getOutlineVertexArray () const
	Get the outline of the contours defining the SphericalPolygon. More...

virtual double	getArea () const
	Return the area of the region in steradians.

virtual bool	isEmpty () const
	Return true if the region is empty.

virtual Vec3d	getPointInside () const
	Return a point located inside the region.

virtual SphericalCap	getBoundingCap () const
	Return a bounding SphericalCap. More...

QVector< SphericalCap >	getBoundingSphericalCaps () const
	Return the list of SphericalCap bounding the ConvexPolygon.

virtual QVariantList	toQVariant () const
	Serialize the region into a QVariant map matching the JSON format. More...

virtual void	serialize (QDataStream &out) const
	Serialize the region. This method must allow as fast as possible serialization and work with deserialize().

virtual bool	contains (const Vec3d &p) const

virtual bool	contains (const SphericalPolygon &r) const

virtual bool	contains (const SphericalConvexPolygon &r) const

virtual bool	contains (const SphericalCap &r) const

virtual bool	contains (const SphericalPoint &r) const

virtual bool	contains (const AllSkySphericalRegion &) const

virtual bool	intersects (const SphericalCap &r) const

virtual bool	intersects (const SphericalPolygon &r) const

virtual bool	intersects (const SphericalConvexPolygon &r) const

virtual bool	intersects (const SphericalPoint &r) const

virtual bool	intersects (const AllSkySphericalRegion &) const

void	setContour (const QVector< Vec3d > &acontour)
	Set a single contour defining the SphericalPolygon. More...

const QVector< Vec3d > &	getConvexContour () const
	Get the single contour defining the SphericalConvexPolygon.

bool	checkValid () const
	Check if the polygon is valid, i.e. it has no side >180.

Public Member Functions inherited from SphericalRegion
virtual SphericalRegionP	getEnlarged (double margin) const
	Return an enlarged version of this SphericalRegion so that any point distant of more than the given margin now lays within the region. More...

virtual QVector< QVector< Vec3d > >	getSimplifiedContours () const
	Get the contours defining the SphericalPolygon when combined using a positive winding rule. More...

QByteArray	toJSON () const
	Output a JSON string representing the polygon. More...

bool	contains (const SphericalRegion *r) const
	Returns whether a SphericalRegion is contained into this region. More...

bool	contains (const SphericalRegionP r) const

bool	contains (const EmptySphericalRegion &) const

bool	intersects (const SphericalRegion *r) const
	Returns whether a SphericalRegion intersects with this region. More...

bool	intersects (const SphericalRegionP r) const

bool	intersects (const Vec3d &p) const

bool	intersects (const EmptySphericalRegion &) const

SphericalRegionP	getIntersection (const SphericalRegion *r) const
	Return a new SphericalRegion consisting of the intersection of this and the given region. More...

SphericalRegionP	getIntersection (const SphericalRegionP r) const

virtual SphericalRegionP	getIntersection (const SphericalPolygon &r) const

virtual SphericalRegionP	getIntersection (const SphericalConvexPolygon &r) const

virtual SphericalRegionP	getIntersection (const SphericalCap &r) const

virtual SphericalRegionP	getIntersection (const SphericalPoint &r) const

virtual SphericalRegionP	getIntersection (const AllSkySphericalRegion &r) const

SphericalRegionP	getIntersection (const EmptySphericalRegion &r) const

SphericalRegionP	getUnion (const SphericalRegion *r) const
	Return a new SphericalRegion consisting of the union of this and the given region. More...

SphericalRegionP	getUnion (const SphericalRegionP r) const

virtual SphericalRegionP	getUnion (const SphericalPolygon &r) const

virtual SphericalRegionP	getUnion (const SphericalConvexPolygon &r) const

virtual SphericalRegionP	getUnion (const SphericalCap &r) const

virtual SphericalRegionP	getUnion (const SphericalPoint &r) const

SphericalRegionP	getUnion (const AllSkySphericalRegion &r) const

virtual SphericalRegionP	getUnion (const EmptySphericalRegion &r) const

SphericalRegionP	getSubtraction (const SphericalRegion *r) const
	Return a new SphericalRegion consisting of the subtraction of the given region from this. More...

SphericalRegionP	getSubtraction (const SphericalRegionP r) const

virtual SphericalRegionP	getSubtraction (const SphericalPolygon &r) const

virtual SphericalRegionP	getSubtraction (const SphericalConvexPolygon &r) const

virtual SphericalRegionP	getSubtraction (const SphericalCap &r) const

virtual SphericalRegionP	getSubtraction (const SphericalPoint &r) const

SphericalRegionP	getSubtraction (const AllSkySphericalRegion &r) const

virtual SphericalRegionP	getSubtraction (const EmptySphericalRegion &r) const

Static Public Member Functions
static bool	checkValidContour (const QVector< Vec3d > &contour)
	Check if the passed contour is convex and valid, i.e. it has no side >180.

static SphericalRegionP	deserialize (QDataStream &in)
	Deserialize the region. This method must allow as fast as possible deserialization.

Protected Member Functions
void	updateBoundingCap ()
	Update the bounding cap from the vertex list.

bool	areAllPointsOutsideOneSide (const QVector< Vec3d > &points) const
	Computes whether the passed points are all outside of at least one SphericalCap defining the polygon boundary.

bool	containsConvexContour (const Vec3d *vertice, int nbVertex) const

Static Protected Member Functions
static bool	areAllPointsOutsideOneSide (const Vec3d thisContour, int nbThisContour, const Vec3d points, int nbPoints)
	Computes whether the passed points are all outside of at least one SphericalCap defining the polygon boundary. More...

Protected Attributes
QVector< Vec3d >	contour
	A list of vertices of the convex contour.

SphericalCap	cachedBoundingCap
	Cache the bounding cap.

Additional Inherited Members
Public Types inherited from SphericalRegion
enum	SphericalRegionType { Point = 0, Cap = 1, AllSky = 2, Polygon = 3, ConvexPolygon = 4, Empty = 5, Invalid = 6 }
	define types for all supported regions.

Detailed Description

Member Function Documentation

◆ areAllPointsOutsideOneSide()

static bool SphericalConvexPolygon::areAllPointsOutsideOneSide	(	const Vec3d *	thisContour,
		int	nbThisContour,
		const Vec3d *	points,
		int	nbPoints
	)

staticprotected

Parameters

thisContour	the vertices defining the contour.
nbThisContour	nb of vertice of the contour.
points	the points to test.
nbPoints	the number of points to test.

◆ getBoundingCap()

virtual SphericalCap SphericalConvexPolygon::getBoundingCap ( ) const

inlinevirtual

This method is heavily used and therefore needs to be very fast. The returned SphericalCap doesn't have to be the smallest one, but smaller is better.

Reimplemented from SphericalRegion.

◆ getOctahedronPolygon()

virtual OctahedronPolygon SphericalConvexPolygon::getOctahedronPolygon ( ) const

inlinevirtual

It can be used for safe computation of intersection/union in the general case.

Implements SphericalRegion.

◆ getOutlineVertexArray()

virtual StelVertexArray SphericalConvexPolygon::getOutlineVertexArray ( ) const

inlinevirtual

Returns: a list of vertex which taken 2 by 2 define the contours of the polygon.

Reimplemented from SphericalRegion.

◆ setContour()

void SphericalConvexPolygon::setContour ( const QVector< Vec3d > & acontour )

inline

Parameters

acontour a contour defining the polygon area.

◆ toQVariant()

virtual QVariantList SphericalConvexPolygon::toQVariant ( ) const

virtual

The format is

["CONVEX_POLYGON", [[ra,dec], [ra,dec], [ra,dec], [ra,dec]]]

where the coords are a closed convex contour, with each points defined by ra dec in degree in the ICRS frame.

Implements SphericalRegion.

Reimplemented in SphericalTexturedConvexPolygon.

Public Member Functions

Static Public Member Functions

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ areAllPointsOutsideOneSide()

◆ getBoundingCap()

◆ getOctahedronPolygon()

◆ getOutlineVertexArray()

◆ setContour()

◆ toQVariant()