gnash::Edge Class Reference

Defines an edge with a control point and an anchor point. More...

#include <Geometry.h>

List of all members.

Public Member Functions
	Edge ()
	Edge (boost::int32_t cx, boost::int32_t cy, boost::int32_t ax, boost::int32_t ay)
	Edge (const Edge &from)
	Edge (const point &ncp, const point &nap)
bool	straight () const
void	transform (const SWFMatrix &mat)
	Transform the edge according to the given SWFMatrix.
Static Public Member Functions
static double	squareDistancePtSeg (const point &p, const point &A, const point &B)
	Return squared distance between point pt and segment A-B.
static double	distancePtSeg (const point &pt, const point &A, const point &B)
	Return distance between point pt and segment A-B.
static point	pointOnCurve (const point &A, const point &C, const point &B, float t)
	Find point of the quadratic curve defined by points A,C,B.
static boost::int64_t	squareDistancePtCurve (const point &A, const point &C, const point &B, const point &p, float t)
Public Attributes
point	cp
point	ap

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Detailed Description

Defines an edge with a control point and an anchor point.

Could be a quadratic bezier curve, or a straight line(degenerated curve).

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Constructor & Destructor Documentation

gnash::Edge::Edge

(

)

[inline]

gnash::Edge::Edge	(	boost::int32_t	cx,
		boost::int32_t	cy,
		boost::int32_t	ax,
		boost::int32_t	ay
	)		[inline]

gnash::Edge::Edge

(

const Edge &

from

)

[inline]

gnash::Edge::Edge	(	const point &	ncp,
		const point &	nap
	)		[inline]

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Member Function Documentation

static double gnash::Edge::distancePtSeg	(	const point &	pt,
		const point &	A,
		const point &	B
	)		[inline, static]

Return distance between point pt and segment A-B.

References squareDistancePtSeg().

static point gnash::Edge::pointOnCurve	(	const point &	A,
		const point &	C,
		const point &	B,
		float	t
	)		[inline, static]

Find point of the quadratic curve defined by points A,C,B.

Parameters:

A	The first point
C	The second point (control point)
B	The third point (anchor point)

Returns:

The point.

Parameters:

t	the step factor between 0 and 1

References gnash::key::R.

Referenced by squareDistancePtCurve(), and gnash::Path::withinSquareDistance().

static boost::int64_t gnash::Edge::squareDistancePtCurve	(	const point &	A,
		const point &	C,
		const point &	B,
		const point &	p,
		float	t
	)		[inline, static]

Return square distance between point pt and the point on curve found by applying the T parameter to the quadratic bezier curve function

Parameters:

A	The first point of the bezier curve
C	The second point of the bezier curve (control point)
B	The third point of the bezier curve (anchor point)
p	The point we want to compute distance from
t	the step factor between 0 and 1

References gnash::geometry::Point2d::squareDistance(), and pointOnCurve().

static double gnash::Edge::squareDistancePtSeg	(	const point &	p,
		const point &	A,
		const point &	B
	)		[inline, static]

Return squared distance between point pt and segment A-B.

References gnash::geometry::Point2d::x, gnash::geometry::Point2d::y, gnash::geometry::Point2d::squareDistance(), and gnash::key::u.

Referenced by distancePtSeg(), and gnash::Path::withinSquareDistance().

bool gnash::Edge::straight

(

)

const [inline]

References cp, and ap.

Referenced by gnash::geometry::pointTest(), gnash::renderer::openvg::preparepath(), gnash::Renderer_cairo::add_path(), and gnash::renderer::opengl::interpolate().

void gnash::Edge::transform

(

const SWFMatrix &

mat

)

[inline]

Transform the edge according to the given SWFMatrix.

References gnash::SWFMatrix::transform(), ap, and cp.

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Member Data Documentation

point gnash::Edge::ap

Referenced by gnash::geometry::pointTest(), straight(), transform(), gnash::renderer::openvg::preparepath(), gnash::Renderer_cairo::add_path(), gnash::renderer::opengl::interpolate(), and gnash::SWF::ShapeRecord::setLerp().

point gnash::Edge::cp

Referenced by gnash::geometry::pointTest(), straight(), transform(), gnash::renderer::openvg::preparepath(), gnash::Renderer_cairo::add_path(), gnash::renderer::opengl::interpolate(), and gnash::SWF::ShapeRecord::setLerp().

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

• Geometry.h