DGtal: LibBoard::QuadraticBezierCurve Struct Reference

A quadratic Bezier curve having 3 control points. NB. It is also a parabola arc. More...

#include <Board/Shapes.h>

Inheritance diagram for LibBoard::QuadraticBezierCurve:

Public Member Functions
	QuadraticBezierCurve (double x1, double y1, double x2, double y2, double x3, double y3, DGtal::Color pen, DGtal::Color fill, double lineWidth, const LineStyle style=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depthValue=-1)

void	flushPostscript (std::ostream &stream, const TransformEPS &transform) const

void	flushFIG (std::ostream &stream, const TransformFIG &transform, std::map< DGtal::Color, int > &colormap) const

void	flushSVG (std::ostream &stream, const TransformSVG &transform) const

void	flushCairo (cairo_t *cr, const TransformCairo &transform) const

void	flushTikZ (std::ostream &stream, const TransformTikZ &transform) const

const std::string &	name () const

Public Member Functions inherited from LibBoard::Triangle
	Triangle (const Point &p1, const Point &p2, const Point &p3, DGtal::Color pen, DGtal::Color fill, double lineWidth, const LineStyle style=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depthValue=-1)

	Triangle (const double x1, const double y1, const double x2, const double y2, const double x3, const double y3, DGtal::Color pen, DGtal::Color fill, double lineWidth, const LineStyle style=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depthValue=-1)

Triangle	rotated (double angle) const

Triangle	translated (double dx, double dy) const

Triangle	scaled (double sx, double sy) const

Triangle	scaled (double s) const

Triangle *	clone () const

Public Member Functions inherited from LibBoard::Polyline
	Polyline (const std::vector< Point > &points, bool closed, DGtal::Color penColor, DGtal::Color fillColor, double lineWidth, const LineStyle lineStyle=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depth=-1)

	Polyline (const Path &path, DGtal::Color penColor, DGtal::Color fillColor, double lineWidth, const LineStyle lineStyle=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depth=-1)

	Polyline (bool closed, DGtal::Color penColor, DGtal::Color fillColor, double lineWidth, const LineStyle lineStyle=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depth=-1)

Point	center () const

Polyline &	operator<< (const Point &p)

Point &	operator[] (const unsigned int n)

Polyline &	rotate (double angle, const Point &center)

Polyline	rotated (double angle, const Point &center) const

Polyline &	rotate (double angle)

Polyline	rotated (double angle) const

Polyline &	translate (double dx, double dy)

Polyline	translated (double dx, double dy) const

Shape &	scale (double sx, double sy)

Shape &	scale (double s)

Polyline	scaled (double sx, double sy) const

Polyline	scaled (double s) const

void	scaleAll (double s)

Rect	boundingBox () const

Public Member Functions inherited from LibBoard::Shape
	Shape (DGtal::Color penColor, DGtal::Color fillColor, double lineWidth, LineStyle style, const LineCap cap, const LineJoin join, int depth)

virtual	~Shape ()

bool	filled () const

Shape &	rotateDeg (double angle, const Point &center)

Shape &	rotateDeg (double angle)

Rect	bbox ()

Shape &	operator-- ()

Shape &	operator++ ()

int	depth () const

virtual void	depth (int)

virtual void	shiftDepth (int shift)

const DGtal::Color &	penColor () const

const DGtal::Color &	fillColor () const

Static Private Attributes
static const std::string	_name

Additional Inherited Members
Public Types inherited from LibBoard::Shape
enum	LineCap { ButtCap = 0 , RoundCap , SquareCap }

enum	LineJoin { MiterJoin = 0 , RoundJoin , BevelJoin }

enum	LineStyle { SolidStyle = 0 , DashStyle , DotStyle , DashDotStyle , DashDotDotStyle , DashDotDotDotStyle }

Protected Member Functions inherited from LibBoard::Shape
std::string	svgProperties (const TransformSVG &transform) const

std::string	postscriptProperties () const

void	setCairoDashStyle (cairo_t *cr, LineStyle type) const

std::string	tikzProperties (const TransformTikZ &transform) const

Protected Attributes inherited from LibBoard::Polyline
Path	_path

Protected Attributes inherited from LibBoard::Shape
int	_depth

DGtal::Color	_penColor

DGtal::Color	_fillColor

double	_lineWidth

LineStyle	_lineStyle

LineCap	_lineCap

LineJoin	_lineJoin

Detailed Description

A quadratic Bezier curve having 3 control points. NB. It is also a parabola arc.

Definition at line 1160 of file Board/Shapes.h.

Constructor & Destructor Documentation

◆ QuadraticBezierCurve()

LibBoard::QuadraticBezierCurve::QuadraticBezierCurve	(	double	x1,
		double	y1,
		double	x2,
		double	y2,
		double	x3,
		double	y3,
		DGtal::Color	pen,
		DGtal::Color	fill,
		double	lineWidth,
		const LineStyle	style = `SolidStyle`,
		const LineCap	cap = `ButtCap`,
		const LineJoin	join = `MiterJoin`,
		int	depthValue = `-1`
	)

inline

Constructs a curve.

Parameters

x1	First coordinate of the start point.
y1	Second coordinate of the start point.
x2	First coordinate of the middle point.
y2	Second coordinate of the middle point.
x3	First coordinate of the end point.
y3	Second coordinate of the end point.
pen	Color of the curve.
fill	Color of the interior.
lineWidth	The line thickness.
style	Curve style
cap	Curve cap
join	Curve join
depthValue	The depth of the line.

Definition at line 1179 of file Board/Shapes.h.

1187 : Triangle(x1, y1, x2, y2, x3, y3, pen, fill, lineWidth, style, cap, join, depthValue) {}

LibBoard::Triangle::Triangle

Triangle(const Point &p1, const Point &p2, const Point &p3, DGtal::Color pen, DGtal::Color fill, double lineWidth, const LineStyle style=SolidStyle, const LineCap cap=ButtCap, const LineJoin join=MiterJoin, int depthValue=-1)

Definition: Board/Shapes.h:1087

Member Function Documentation

◆ flushCairo()

void LibBoard::QuadraticBezierCurve::flushCairo	(	cairo_t *	cr,
		const TransformCairo &	transform
	)		const

virtual

Writes the cairo code of the shape in a cairo drawing context according to a transform.

Parameters

cr	The cairo drawing context.
transform	A 2D transform to be applied.

Reimplemented from LibBoard::Polyline.

Definition at line 2448 of file Shapes.cpp.

 {
   double x1, y1, x2, y2, x3, y3, x4, y4; //coordinates of the control points
   _path[ 0 ].get(x1, y1);
   _path[ 1 ].get(x3, y3);
   _path[ 2 ].get(x4, y4);
   //we compute the two middle control points of a cubic Bezier curve
   //from the three control points of the quadratic Bezier curve
   x2 = x1 + 2/3.0*(x3-x1); 
   y2 = y1 + 2/3.0*(y3-y1); 
   x3 = x2 + 1/3.0*(x4-x1); 
   y3 = y2 + 1/3.0*(y4-y1); 
  
   cairo_save (cr);
  
   cairo_set_source_rgba (cr, _fillColor.red()/255.0, _fillColor.green()/255.0, _fillColor.blue()/255.0, 1.);
  
   cairo_move_to( cr, transform.mapX( x1 ), transform.mapY( y1 ) ); 
   cairo_curve_to( cr, transform.mapX( x2 ), transform.mapY( y2 ), 
                   transform.mapX( x3 ), transform.mapY( y3 ), 
                   transform.mapX( x4 ), transform.mapY( y4 ) ); 
  
   if ( filled() )
     {
       if ( _penColor != DGtal::Color::None )
         cairo_fill_preserve (cr);
       else
         cairo_fill (cr);
     }
       
   if ( _penColor != DGtal::Color::None )
     {
       cairo_set_source_rgba (cr, _penColor.red()/255.0, _penColor.green()/255.0, _penColor.blue()/255.0, 1.);
     
       cairo_set_line_width (cr, _lineWidth);
       cairo_set_line_cap (cr, cairoLineCap[_lineCap]);
       cairo_set_line_join (cr, cairoLineJoin[_lineJoin]);
       setCairoDashStyle (cr, _lineStyle);
  
       cairo_stroke (cr);
     }
     
   cairo_restore (cr);
 }

References LibBoard::Shape::_fillColor, LibBoard::Shape::_lineCap, LibBoard::Shape::_lineJoin, LibBoard::Shape::_lineStyle, LibBoard::Shape::_lineWidth, LibBoard::Polyline::_path, LibBoard::Shape::_penColor, DGtal::Color::blue(), LibBoard::Shape::filled(), DGtal::Color::green(), DGtal::Color::None, DGtal::Color::red(), and LibBoard::Shape::setCairoDashStyle().

◆ flushFIG()

void LibBoard::QuadraticBezierCurve::flushFIG	(	std::ostream &	stream,
		const TransformFIG &	transform,
		std::map< DGtal::Color, int > &	colormap
	)		const

virtual

Writes the FIG code of the shape in a stream according to a transform.

Parameters

stream	The output stream.
transform	A 2D transform to be applied.
colormap	A colormap.

Reimplemented from LibBoard::Polyline.

Definition at line 2416 of file Shapes.cpp.

 {
   stream << "#FIXME: quadratic Bezier curve unimplemented" << std::endl; 
   Triangle::flushFIG(stream, transform, colormap); 
 }

References LibBoard::Polyline::flushFIG().

◆ flushPostscript()

void LibBoard::QuadraticBezierCurve::flushPostscript	(	std::ostream &	stream,
		const TransformEPS &	transform
	)		const

virtual

Writes the EPS code of the shape in a stream according to a transform.

Parameters

stream	The output stream.
transform	A 2D transform to be applied.

Reimplemented from LibBoard::Polyline.

Definition at line 2366 of file Shapes.cpp.

 {
   double x1, y1, x2, y2, x3, y3, x4, y4; //coordinates of the control points
   _path[ 0 ].get(x1, y1);
   _path[ 1 ].get(x3, y3);
   _path[ 2 ].get(x4, y4);
   //we compute the two middle control points of a cubic Bezier curve
   //from the three control points of the quadratic Bezier curve
   x2 = x1 + 2/3.0*(x3-x1); 
   y2 = y1 + 2/3.0*(y3-y1); 
   x3 = x2 + 1/3.0*(x4-x1); 
   y3 = y2 + 1/3.0*(y4-y1); 
  
   stream << std::endl << "% Bezier curve" << std::endl;
   if ( _fillColor != DGtal::Color::None ) {
     stream << "n "
            << transform.mapX( x1 ) << " "
            << transform.mapY( y1 ) << " "
            << "m "
            << transform.mapX( x2 ) << " "
            << transform.mapY( y2 ) << " "
            << transform.mapX( x3 ) << " "
            << transform.mapY( y3 ) << " "
            << transform.mapX( x4 ) << " "
            << transform.mapY( y4 ) << " "
            << "curveto ";  
       _fillColor.flushPostscript( stream );
       stream << " " << postscriptProperties();
       stream << " fill" << std::endl;
   }
   if ( _penColor != DGtal::Color::None ) {
     stream << " " << postscriptProperties() << " "; 
     stream << "n "
            << transform.mapX( x1 ) << " "
            << transform.mapY( y1 ) << " "
            << "m "
            << transform.mapX( x2 ) << " "
            << transform.mapY( y2 ) << " "
            << transform.mapX( x3 ) << " "
            << transform.mapY( y3 ) << " "
            << transform.mapX( x4 ) << " "
            << transform.mapY( y4 ) << " "
            << "curveto ";  
     _penColor.flushPostscript( stream );
     stream << " stroke" << std::endl;
   }
 }

References LibBoard::Shape::_fillColor, LibBoard::Polyline::_path, LibBoard::Shape::_penColor, DGtal::Color::flushPostscript(), DGtal::Color::None, and LibBoard::Shape::postscriptProperties().

◆ flushSVG()

void LibBoard::QuadraticBezierCurve::flushSVG	(	std::ostream &	stream,
		const TransformSVG &	transform
	)		const

virtual

Writes the SVG code of the shape in a stream according to a transform.

Parameters

stream	The output stream.
transform	A 2D transform to be applied.

Reimplemented from LibBoard::Polyline.

Definition at line 2425 of file Shapes.cpp.

 {
   double x1, y1, x2, y2, x3, y3; //coordinates of the control points
   _path[ 0 ].get(x1, y1);
   _path[ 1 ].get(x2, y2);
   _path[ 2 ].get(x3, y3);
  
   stream << "<path ";
   stream << svgProperties( transform ) << " ";
   //first point 
   stream << "d='M " << transform.mapX( x1 );
   stream << "," << transform.mapY( y1 );
   //arc
   stream << " Q " << transform.mapX( x2 ) << "," << transform.mapY( y2 );
   //last point
   stream << " " << transform.mapX( x3 );
   stream << "," << transform.mapY( y3 );
   stream << "' />";
 }

References LibBoard::Polyline::_path, and LibBoard::Shape::svgProperties().

◆ flushTikZ()

void LibBoard::QuadraticBezierCurve::flushTikZ	(	std::ostream &	stream,
		const TransformTikZ &	transform
	)		const

virtual

Writes the TikZ code of the shape in a stream according to a transform.

Parameters

stream	The output stream.
transform	A 2D transform to be applied.

Reimplemented from LibBoard::Polyline.

Definition at line 2496 of file Shapes.cpp.

 {
   double x1, y1, x2, y2, x3, y3, x4, y4; //coordinates of the control points
   _path[ 0 ].get(x1, y1);
   _path[ 1 ].get(x3, y3);
   _path[ 2 ].get(x4, y4);
   //we compute the two middle control points of a cubic Bezier curve
   //from the three control points of the quadratic Bezier curve
   x2 = x1 + 2/3.0*(x3-x1); 
   y2 = y1 + 2/3.0*(y3-y1); 
   x3 = x2 + 1/3.0*(x4-x1); 
   y3 = y2 + 1/3.0*(y4-y1); 
  
   stream << "\\draw[" << tikzProperties(transform) << "] ("
          << transform.mapX( x1 ) << ',' << transform.mapY( y1 )
          << ") .. controls ("
          << transform.mapX( x2 ) << ',' << transform.mapY( y2 )
          << ") and ("
          << transform.mapX( x3 ) << ',' << transform.mapY( y3 )
          << ") .. ("
          << transform.mapX( x4 ) << ',' << transform.mapY( y4 )
          << ");" << std::endl;
 }

References LibBoard::Polyline::_path, and LibBoard::Shape::tikzProperties().

◆ name()

const std::string & LibBoard::QuadraticBezierCurve::name ( ) const

virtual

Returns the name of the shape (QuadraticBezierCurve)

Returns: object name

Reimplemented from LibBoard::Triangle.

Definition at line 2360 of file Shapes.cpp.

 {
     return _name;
 }

References _name.

Field Documentation

◆ _name

const std::string LibBoard::QuadraticBezierCurve::_name

staticprivate

name of the shape.

Definition at line 1215 of file Board/Shapes.h.

Referenced by name().

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

Public Member Functions

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QuadraticBezierCurve()

Member Function Documentation

◆ flushCairo()

◆ flushFIG()

◆ flushPostscript()

◆ flushSVG()

◆ flushTikZ()

◆ name()

Field Documentation

◆ _name