sfc::BezierAbstractCurve Class Reference

Abstract Bezier curve class. More...

#include <BezierAbstractCurve.hpp>

Inheritance diagram for sfc::BezierAbstractCurve:

Public Member Functions
virtual Line2< float >	getHelperLine (const float) const =0
	Get last line used to draw a curve. More...
virtual void	update ()=0
	Calculates vertices. More...
virtual std::size_t	getPointCount () const
	Returns point count.
virtual sf::Vector2f	getPoint (std::size_t) const =0
	Get n-th point of curve. More...
virtual	~BezierAbstractCurve ()
	Virtual destructor. More...
virtual void	calculateVeritces (std::vector< sf::Vector2f > &vector, const float limitCurve, sf::Vertex *debugLines)=0
	Calculate points on cuve. More...
void	setColor (const sf::Color &)
	Sets color. More...
sf::Color	getColor ()
	Returns color of curve.
void	setNormalizedLengthLimit (const float)
	Set part of curve to be drawn. More...
float	getNormalizedLengthLimit ()
	Get part of curve to be drawn. More...
void	setPointCount (const std::size_t)
	Set amount of points to draw curve. More...
void	move (sf::Vector2f)
	Translate curve.
void	scale (const sf::Vector2f &factor)
	Scale curve.

Protected Attributes
VertexVector< sf::LinesStrip >	m_vertices
	Vertices used to draw curve.
std::size_t	m_pointCount
	Stores points count.
sf::Color	m_color
	Curve's color.
sf::Vector2f	m_begin
	First point of a curve.
sf::Vector2f	m_end
	Last point of a curve.
float	m_limitCurve
	Part of curve to be drawn. More...
DrawMode	m_mode
	Drawing mode. More...

Detailed Description

Abstract Bezier curve class.

Do not define methods!
Inherit it to create class compatibile with Brezier Curve API.
Remember, it's not an interface, this class contains variables and some definied methods – getters & setters (mostly).

Constructor & Destructor Documentation

~BezierAbstractCurve()

virtual sfc::BezierAbstractCurve::~BezierAbstractCurve ( )

inlinevirtual

Virtual destructor.

Does nothing expect of ensuring that destructors of inherited classes will be called.

Member Function Documentation

calculateVeritces()

virtual void sfc::BezierAbstractCurve::calculateVeritces ( std::vector< sf::Vector2f > &  vector, const float  limitCurve, sf::Vertex *  debugLines  )

pure virtual

Calculate points on cuve.

Parameters

[out]	vector	– vector to store vertices
[in]	limitCurve	– part of curve to be drawn, range [0, 1]
[out]	debugLines	– vertex array, used to store and draw helper lines

Calculates all curve-related things like vertices positions / helper lines etc. Not a big deal, use only if you really want to inherit BezierCubicCurve.

Implemented in sfc::BezierCubicCurve, and sfc::BezierSquareCurve.

getHelperLine()

virtual Line2<float> sfc::BezierAbstractCurve::getHelperLine ( const float  ) const

pure virtual

Get last line used to draw a curve.

Parameters

[in]

normalized

– progress of drawing curve in range [0, 1]

Other helper lines are ignored, this function returns the one, on which "pencil" is placed.

Implemented in sfc::BezierCubicCurve, and sfc::BezierSquareCurve.

getNormalizedLengthLimit()

float sfc::BezierAbstractCurve::getNormalizedLengthLimit

(

)

Get part of curve to be drawn.

Take a look at setNormalizedLengthLimit() and m_limitCurve.

getPoint()

virtual sf::Vector2f sfc::BezierAbstractCurve::getPoint ( std::size_t  ) const

pure virtual

Get n-th point of curve.

Parameters

[in]

index

– point index

Implemented in sfc::BezierCubicCurve, and sfc::BezierSquareCurve.

setColor()

void sfc::BezierAbstractCurve::setColor

(

const sf::Color &

color

)

Sets color.

Parameters

[in]

color

– New color

Use to set color of curve's vertices.

curve.setColor({255, 20, 20}); //Red

setNormalizedLengthLimit()

void sfc::BezierAbstractCurve::setNormalizedLengthLimit

(

const float

limit

)

Set part of curve to be drawn.

Parameters

[in]

normalized

– part of curve to be drawn in range [0, 1]

curve.setNormalizedLengthLimit(.5f); //Draw 50% of the curve

setPointCount()

void sfc::BezierAbstractCurve::setPointCount

(

const std::size_t

count

)

Set amount of points to draw curve.

Parameters

[in]

count

– Amount of points to use

curve1.setPointCount(6); //Ugly one
curve12.setPointCount(200); //OK in most cases
curve2.setPointCount(6000); //Sooo good (actually too much)

update()

virtual void sfc::BezierAbstractCurve::update ( )

pure virtual

Calculates vertices.

Changes are applied only when this function is called.

sfc::BezierCubicCurve curve(arg1, arg2, arg3, arg4);
curve.update();
//...
curve.setColor({68, 69, 70}); //Ignored
window.draw(curve);

Implemented in sfc::BezierCubicCurve, and sfc::BezierSquareCurve.

Member Data Documentation

m_limitCurve

float sfc::BezierAbstractCurve::m_limitCurve

protected

Part of curve to be drawn.

Real number in range [0, 1], if set to .5 only 50% of curve will be drawn etc.

m_mode

DrawMode sfc::BezierAbstractCurve::m_mode

protected

Drawing mode.

NORMAL – Just draw curve
DEBUG – Draw also helper lines etc.

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

• SFC/BezierAbstractCurve.hpp
• SFC/BezierAbstractCurve.cpp