StelSphereGeometry.hpp File Reference

Define all SphericalGeometry primitives as well as the SphericalRegionP type. More...

#include <QDebug>
#include <QSharedPointer>
#include <QVariant>
#include <QVarLengthArray>
#include <QVector>
#include "OctahedronPolygon.hpp"
#include "renderer/StelVertexBuffer.hpp"
#include "Triplet.hpp"
#include "VecMath.hpp"

Go to the source code of this file.

Classes
class	SphericalRegionP
	A shared pointer on a SphericalRegion. More...
class	SphericalRegion
	Abstract class defining a region of the sphere. More...
struct	SphericalRegion::DrawParams
	Parameters specifying how to draw a SphericalRegion. More...
struct	SphericalRegion::PlainVertex
	3D vertex with only a position. More...
struct	SphericalRegion::TexturedVertex
	3D vertex with position and a texture coordinate. More...
class	SphericalCap
	A SphericalCap is defined by a direction and an aperture. More...
class	SphericalPoint
	Special SphericalRegion for a point on the sphere. More...
class	AllSkySphericalRegion
	Special SphericalRegion for the whole sphere. More...
class	EmptySphericalRegion
class	SphericalPolygon
class	SphericalConvexPolygon
	A special case of SphericalPolygon for which the polygon is convex. More...
class	SphericalTexturedConvexPolygon
	Extension of SphericalConvexPolygon for textured polygon. More...

Functions
	Q_DECLARE_METATYPE (SphericalRegionP)
QDataStream &	operator<< (QDataStream &out, const SphericalRegionP &region)
	Serialize the passed SphericalRegionP into a binary blob. More...
QDataStream &	operator>> (QDataStream &in, SphericalRegionP &region)
	Load the SphericalRegionP from a binary blob. More...
bool	sideHalfSpaceContains (const Vec3d &v1, const Vec3d &v2, const Vec3d &p)
	Return whether the halfspace defined by the vectors v1^v2 and with aperture 90 deg contains the point p. More...
bool	sideHalfSpaceContains (const Vec3d &v1, const Vec3d &v2, const SphericalCap &h)
	Return whether the halfspace defined by the vectors v1 and v2 contains the SphericalCap h. More...
bool	sideHalfSpaceIntersects (const Vec3d &v1, const Vec3d &v2, const SphericalCap &h)
	Return whether the halfspace defined by the vectors v1 and v2 intersects the SphericalCap h. More...
Vec3d	greatCircleIntersection (const Vec3d &p1, const Vec3d &p2, const Vec3d &p3, const Vec3d &p4, bool &ok)
	Compute the intersection of 2 great circles segments. More...
Vec3d	greatCircleIntersection (const Vec3d &p1, const Vec3d &p2, const Vec3d &nHalfSpace, bool &ok)
	Compute the intersection of a great circles segment with another great circle. More...

Detailed Description

Define all SphericalGeometry primitives as well as the SphericalRegionP type.

Definition in file StelSphereGeometry.hpp.

Function Documentation

Vec3d greatCircleIntersection	(	const Vec3d &	p1,
		const Vec3d &	p2,
		const Vec3d &	p3,
		const Vec3d &	p4,
		bool &	ok
	)

Compute the intersection of 2 great circles segments.

Parameters

p1	Start of the first great circle segment.
p2	End of the first great circle segment.
p3	Start of the second great circle segment.
p4	End of the second great circle segment.
ok	is set to false if no intersection was found.

Returns

the intersection point on the sphere (normalized) if ok is true, or undefined of ok is false.

Vec3d greatCircleIntersection	(	const Vec3d &	p1,
		const Vec3d &	p2,
		const Vec3d &	nHalfSpace,
		bool &	ok
	)

Compute the intersection of a great circles segment with another great circle.

Parameters

p1	Start of the great circle segment.
p2	End of the great circle segment.
nHalfSpace	Normal of the plane separating half space to intersect with.
ok	is set to false if no intersection was found.

Returns

the intersection point on the sphere (normalized) if ok is true, or undefined of ok is false.

QDataStream& operator<<	(	QDataStream &	out,
		const SphericalRegionP &	region
	)

Serialize the passed SphericalRegionP into a binary blob.

QDataStream& operator>>	(	QDataStream &	in,
		SphericalRegionP &	region
	)

Load the SphericalRegionP from a binary blob.

bool sideHalfSpaceContains ( const Vec3d &  v1, const Vec3d &  v2, const Vec3d &  p  )

inline

Return whether the halfspace defined by the vectors v1^v2 and with aperture 90 deg contains the point p.

The comparison is made with a double number slightly smaller than zero to avoid floating point precision errors problems (one test fails if it is set to zero).

Definition at line 637 of file StelSphereGeometry.hpp.

bool sideHalfSpaceContains ( const Vec3d &  v1, const Vec3d &  v2, const SphericalCap &  h  )

inline

Return whether the halfspace defined by the vectors v1 and v2 contains the SphericalCap h.

Definition at line 645 of file StelSphereGeometry.hpp.

bool sideHalfSpaceIntersects ( const Vec3d &  v1, const Vec3d &  v2, const SphericalCap &  h  )

inline

Return whether the halfspace defined by the vectors v1 and v2 intersects the SphericalCap h.

Definition at line 654 of file StelSphereGeometry.hpp.