gnash::Edge Class Reference

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

#include <Geometry.h>

Public Member Functions
constexpr	Edge ()
constexpr	Edge (std::int32_t cx, std::int32_t cy, std::int32_t ax, std::int32_t ay)
constexpr	Edge (const Edge &from)
constexpr	Edge (const point &ncp, const point &nap)
bool	straight () const
void	transform (const SWFMatrix &mat)
	Transform the edge according to the given SWFMatrix. More...

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. More...
static double	distancePtSeg (const point &pt, const point &A, const point &B)
	Return distance between point pt and segment A-B. More...
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. More...
static std::int64_t	squareDistancePtCurve (const point &A, const point &C, const point &B, const point &p, float t)

Public Attributes
point	cp
point	ap

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).

Constructor & Destructor Documentation

Edge() [1/4]

constexpr gnash::Edge::Edge ( )

inlineconstexpr

Edge() [2/4]

constexpr gnash::Edge::Edge ( std::int32_t  cx, std::int32_t  cy, std::int32_t  ax, std::int32_t  ay  )

inlineconstexpr

Edge() [3/4]

constexpr gnash::Edge::Edge ( const Edge &  from )

inlineconstexpr

Edge() [4/4]

constexpr gnash::Edge::Edge ( const point &  ncp, const point &  nap  )

inlineconstexpr

Member Function Documentation

distancePtSeg()

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

inlinestatic

Return distance between point pt and segment A-B.

References gnash::key::A, gnash::key::B, and squareDistancePtSeg().

pointOnCurve()

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

inlinestatic

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::A, gnash::key::B, gnash::key::C, gnash::key::R, and gnash::key::t.

Referenced by squareDistancePtCurve().

squareDistancePtCurve()

static std::int64_t gnash::Edge::squareDistancePtCurve ( const point &  A, const point &  C, const point &  B, const point &  p, float  t  )

inlinestatic

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::key::A, gnash::key::B, gnash::key::C, gnash::key::p, pointOnCurve(), and gnash::key::t.

squareDistancePtSeg()

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

inlinestatic

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

References gnash::key::A, gnash::key::B, gnash::key::p, and gnash::key::u.

Referenced by distancePtSeg().

straight()

bool gnash::Edge::straight ( ) const

inline

References ap, and cp.

Referenced by gnash::Renderer_cairo::add_path(), and gnash::renderer::openvg::preparepath().

transform()

void gnash::Edge::transform ( const SWFMatrix &  mat )

inline

Transform the edge according to the given SWFMatrix.

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

Member Data Documentation

ap

point gnash::Edge::ap

Referenced by gnash::Renderer_cairo::add_path(), gnash::Path::close(), gnash::renderer::openvg::preparepath(), gnash::SWF::ShapeRecord::setLerp(), straight(), and transform().

cp

point gnash::Edge::cp

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

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

• Geometry.h