Arc Class Reference

An Object representing an arc. More...

Inheritance diagram for Arc:

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Collaboration diagram for Arc:

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List of all members.

Public Member Functions
	Arc (const Coordinate &center, const double radius, const double startangle, const double angle)
	Construct an Arc with a given center, radius, start angle and dimension (both in radians).
Arc *	copy () const
	Returns a copy of this Object.
Object *	transform (const Transformation &t) const
	Return this Object, transformed by the transformation t.
bool	valid () const
	Returns true if this is a valid Object.
const ObjectType *	type () const
	Returns the lowermost ObjectType that this object is an instantiation of.
const Coordinate	center () const
	Return the center of this arc.
double	radius () const
	Return the radius of this arc.
double	startAngle () const
	Return the start angle in radians of this arc.
double	angle () const
	Return the dimension in radians of this arc.
Coordinate	firstEndPoint () const
	Return the start point of this arc.
Coordinate	secondEndPoint () const
	Return the end point of this arc.
const double	sectorSurface () const
	Return the size of the sector surface of this arc.
bool	equals (const Object &rhs) const
	Returns true if this Object is equal to rhs.
bool	containsPoint (const Coordinate &p, const KigDocument &doc) const
	Return whether this Curve contains the given point.
Static Public Member Functions
static const ObjectType *	stype ()
	Returns the ObjectType representing the Arc type.

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Detailed Description

An Object representing an arc.

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Member Function Documentation

static const ObjectType* Arc::stype

(

)

[static]

Returns the ObjectType representing the Arc type.

Reimplemented from Curve.

Arc* Arc::copy

(

)

const [virtual]

Returns a copy of this Object.

The copy is an exact copy. Changes to the copy don't affect the original.

Implements Curve.

bool Arc::valid

(

)

const

Returns true if this is a valid Object.

If you want to return an invalid Object, you should return an InvalidObject instance.

Reimplemented from Object.

const ObjectType* Arc::type

(

)

const [virtual]

Returns the lowermost ObjectType that this object is an instantiation of.

E.g. if you want to get a string containing the internal name of the type of an object, you can do:

 tn = object.type().internalName()

Implements Object.

bool Arc::equals

(

const Object &

rhs

)

const [virtual]

Returns true if this Object is equal to rhs.

This function checks whether rhs is of the same Object type, and whether it contains the same data as this Object.

Implements Object.

bool Arc::containsPoint	(	const Coordinate &	p,
		const KigDocument &
	)			const [virtual]

Return whether this Curve contains the given point.

This is implemented as a numerical approximation. lementations can/should use the value test_threshold in common.h as a threshold value.

Implements Curve.