A triangle with shaded filling according to colors given for each vertex. More...

#include <Board/Shapes.h>

Inheritance diagram for LibBoard::GouraudTriangle:

Public Member Functions
	GouraudTriangle (const Point &p0, const DGtal::Color &color0, const Point &p1, const DGtal::Color &color1, const Point &p2, const DGtal::Color &color2, int subdivisions, int depth=-1)

	GouraudTriangle (const Point &p0, float brightness0, const Point &p1, float brightness1, const Point &p2, float brightness2, const DGtal::Color &fillColor, int subdivisions, int depth=-1)

const std::string &	name () const

Point	center () const

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

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

GouraudTriangle &	rotate (double angle)

GouraudTriangle	rotated (double angle) const

GouraudTriangle	translated (double dx, double dy) const

GouraudTriangle	scaled (double sx, double sy) const

GouraudTriangle	scaled (double s) const

void	scaleAll (double s)

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

GouraudTriangle *	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)

const std::string &	name () const

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)

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

Rect	boundingBox () const

Polyline *	clone () 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 ()

virtual const std::string &	name () const

virtual Shape *	clone () const =0

bool	filled () const

virtual Point	center () const =0

virtual Shape &	rotate (double angle, const Point &center)=0

virtual Shape &	rotate (double angle)=0

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

Shape &	rotateDeg (double angle)

virtual Shape &	translate (double dx, double dy)=0

virtual Shape &	scale (double sx, double sy)=0

virtual Shape &	scale (double s)=0

virtual Rect	boundingBox () const =0

Rect	bbox ()

Shape &	operator-- ()

Shape &	operator++ ()

virtual void	scaleAll (double s)=0

virtual void	flushPostscript (std::ostream &stream, const TransformEPS &transform) const =0

virtual void	flushFIG (std::ostream &stream, const TransformFIG &transform, std::map< DGtal::Color, int > &colormap) const =0

virtual void	flushSVG (std::ostream &stream, const TransformSVG &transform) const =0

virtual void	flushCairo (cairo_t *cr, const TransformCairo &transform) const =0

virtual void	flushTikZ (std::ostream &stream, const TransformTikZ &transform) const =0

int	depth () const

virtual void	depth (int)

virtual void	shiftDepth (int shift)

const DGtal::Color &	penColor () const

const DGtal::Color &	fillColor () const

Protected Attributes
DGtal::Color	_color0

DGtal::Color	_color1

DGtal::Color	_color2

int	_subdivisions

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

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

Detailed Description

A triangle with shaded filling according to colors given for each vertex.

The GouraudTriangle structure.

Definition at line 1223 of file Board/Shapes.h.

Constructor & Destructor Documentation

◆ GouraudTriangle() [1/2]

LibBoard::GouraudTriangle::GouraudTriangle	(	const Point &	p0,
		const DGtal::Color &	color0,
		const Point &	p1,
		const DGtal::Color &	color1,
		const Point &	p2,
		const DGtal::Color &	color2,
		int	subdivisions,
		int	depth = `-1`
	)

Definition at line 2094 of file Shapes.cpp.

        : Polyline( std::vector<Point>(), true, DGtal::Color::None, DGtal::Color::None,
                    0.0f, SolidStyle, ButtCap, MiterJoin, depthValue ),
        _color0( color0 ), _color1( color1 ), _color2( color2 ), _subdivisions( subdivisions ) {
    _path << p0;
    _path << p1;
    _path << p2;
 
    Shape::_fillColor.red( ( color0.red() + color1.red() + color2.red() ) / 3 );
    Shape::_fillColor.green( ( color0.green() + color1.green() + color2.green() ) / 3 );
    Shape::_fillColor.blue( ( color0.blue() + color1.blue() + color2.blue() ) / 3 );
}

References LibBoard::Polyline::_path, DGtal::Color::blue(), DGtal::Color::green(), and DGtal::Color::red().

◆ GouraudTriangle() [2/2]

LibBoard::GouraudTriangle::GouraudTriangle	(	const Point &	p0,
		float	brightness0,
		const Point &	p1,
		float	brightness1,
		const Point &	p2,
		float	brightness2,
		const DGtal::Color &	fillColor,
		int	subdivisions,
		int	depth = `-1`
	)

Definition at line 2111 of file Shapes.cpp.

        : Polyline( std::vector<Point>(), true, DGtal::Color::None, DGtal::Color::None,
                    0.0f, SolidStyle, ButtCap, MiterJoin, depthValue ),
    _color0( fill ), _color1( fill ), _color2( fill ), _subdivisions( subdivisions )
{
    _path << p0;
    _path << p1;
    _path << p2;
    _color0.red( static_cast<unsigned char>( std::min( 255.0f, _color0.red() * brightness0 ) ) );
    _color0.green( static_cast<unsigned char>( std::min( 255.0f, _color0.green() * brightness0 ) ) );
    _color0.blue( static_cast<unsigned char>( std::min( 255.0f, _color0.blue() * brightness0 ) ) );
    _color1.red( static_cast<unsigned char>( std::min( 255.0f, _color1.red() * brightness1 ) ) );
    _color1.green( static_cast<unsigned char>( std::min( 255.0f, _color1.green() * brightness1 ) ) );
    _color1.blue( static_cast<unsigned char>( std::min( 255.0f, _color1.blue() * brightness1 ) ) );
    _color2.red( static_cast<unsigned char>( std::min( 255.0f, _color2.red() * brightness2 ) ) );
    _color2.green( static_cast<unsigned char>( std::min( 255.0f, _color2.green() * brightness2 ) ) );
    _color2.blue( static_cast<unsigned char>( std::min( 255.0f, _color2.blue() * brightness2 ) ) );
 
    Shape::_fillColor.red( ( _color0.red() + _color1.red() + _color2.red() ) / 3 );
    Shape::_fillColor.green( ( _color0.green() + _color1.green() + _color2.green() ) / 3 );
    Shape::_fillColor.blue( ( _color0.blue() + _color1.blue() + _color2.blue() ) / 3 );
}

References _color0, _color1, _color2, LibBoard::Polyline::_path, DGtal::Color::blue(), DGtal::Color::green(), and DGtal::Color::red().

Member Function Documentation

◆ center()

Point LibBoard::GouraudTriangle::center ( ) const

virtual

Returns the gravity center of the shape.

Returns: The center of the shape.

Reimplemented from LibBoard::Polyline.

Definition at line 2140 of file Shapes.cpp.

                              {
    return ( _path[0] + _path[1] + _path[2] ) / 3.0;
}

References LibBoard::Polyline::_path.

Referenced by rotate(), and rotated().

◆ clone()

GouraudTriangle * LibBoard::GouraudTriangle::clone ( ) const

virtual

Return a copy of the shape.

Returns: copye of the shape.

Reimplemented from LibBoard::Polyline.

Definition at line 2194 of file Shapes.cpp.

                             {
    return new GouraudTriangle(*this);
}

◆ flushCairo()

void LibBoard::GouraudTriangle::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 2299 of file Shapes.cpp.

2301{

2302}

◆ flushFIG()

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

virtual

Sends the Triangle to a FIG file format stream.

Warning! Because shading would generally require more colors in the colormap than allowed by the FIG file format, rendering a Gouraud triangle in an XFig file is the same as rendering a simple triangle whose filling color is the average of the vertex colors.

Parameters

stream	output stream
transform	transform
colormap	colormap

Reimplemented from LibBoard::Polyline.

Definition at line 2228 of file Shapes.cpp.

{
 
    DGtal::Color c( static_cast<unsigned char>((_color0.red() + _color1.red() + _color2.red() )/3.0),
             static_cast<unsigned char>((_color0.green() + _color1.green() + _color2.green())/3.0),
             static_cast<unsigned char>((_color0.blue() + _color1.blue() + _color2.blue())/3.0 ));
    Polyline( _path, DGtal::Color::None, c, 0.0f ).flushFIG( stream, transform, colormap );
 
    // if ( ! _subdivisions ) {
    // Polyline::flushFIG( stream, transform, colormap );
    // return;
    // }
// TODO : Handle extended colormap through clustering...
//   const Point & p0 = _points[0];
//   const Point & p1 = _points[1];
//   const Point & p2 = _points[2];
//   Point p01( 0.5*(p0.x+p1.x), 0.5*(p0.y+p1.y) );
//   DGtal::Color c01( (_color0.red() + _color1.red())/2,
//        (_color0.green() + _color1.green())/2,
//        (_color0.blue() + _color1.blue())/2 );
//   Point p12( 0.5*(p1.x+p2.x), 0.5*(p1.y+p2.y) );
//   DGtal::Color c12( (_color1.red() + _color2.red())/2,
//        (_color1.green() + _color2.green())/2,
//        (_color1.blue() + _color2.blue())/2 );
//   Point p20( 0.5*(p2.x+p0.x), 0.5*(p2.y+p0.y) );
//   DGtal::Color c20( (_color2.red() + _color0.red())/2,
//        (_color2.green() + _color0.green())/2,
//        (_color2.blue() + _color0.blue())/2 );
//   GouraudTriangle( p0, _color0, p20, c20, p01, c01, _subdivisions - 1, _depth ).flushFIG( stream, transform, colormap );
//   GouraudTriangle( p1, _color1, p01, c01, p12, c12, _subdivisions - 1, _depth ).flushFIG( stream, transform, colormap );
//   GouraudTriangle( p2, _color2, p20, c20, p12, c12, _subdivisions - 1, _depth ).flushFIG( stream, transform, colormap );
//   GouraudTriangle( p01, c01, p12, c12, p20, c20,  _subdivisions - 1, _depth ).flushFIG( stream, transform, colormap );
}

References _color0, _color1, _color2, LibBoard::Polyline::_path, DGtal::Color::blue(), LibBoard::Polyline::flushFIG(), DGtal::Color::green(), DGtal::Color::None, and DGtal::Color::red().

◆ flushPostscript()

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

virtual

Sends the triangle to a Postscript document.

Parameters

stream	output stream
transform	transform

Reimplemented from LibBoard::Polyline.

Definition at line 2199 of file Shapes.cpp.

{
    if ( ! _subdivisions ) {
        Polyline::flushPostscript( stream, transform );
        return;
    }
    const Point & p0 = _path[0];
    const Point & p1 = _path[1];
    const Point & p2 = _path[2];
    Point p01( 0.5*(p0.x+p1.x), 0.5*(p0.y+p1.y) );
    DGtal::Color c01( (_color0.red() + _color1.red())/2,
               (_color0.green() + _color1.green())/2,
               (_color0.blue() + _color1.blue())/2 );
    Point p12( 0.5*(p1.x+p2.x), 0.5*(p1.y+p2.y) );
    DGtal::Color c12( (_color1.red() + _color2.red())/2,
               (_color1.green() + _color2.green())/2,
               (_color1.blue() + _color2.blue())/2 );
    Point p20( 0.5*(p2.x+p0.x), 0.5*(p2.y+p0.y) );
    DGtal::Color c20( (_color2.red() + _color0.red())/2,
               (_color2.green() + _color0.green())/2,
               (_color2.blue() + _color0.blue())/2 );
    GouraudTriangle( p0, _color0, p20, c20, p01, c01, _subdivisions - 1, _depth ).flushPostscript( stream, transform );
    GouraudTriangle( p1, _color1, p01, c01, p12, c12, _subdivisions - 1, _depth ).flushPostscript( stream, transform );
    GouraudTriangle( p2, _color2, p20, c20, p12, c12, _subdivisions - 1, _depth ).flushPostscript( stream, transform );
    GouraudTriangle( p01, c01, p12, c12, p20, c20,  _subdivisions - 1, _depth ).flushPostscript( stream, transform );
}

References _color0, _color1, _color2, LibBoard::Shape::_depth, LibBoard::Polyline::_path, _subdivisions, DGtal::Color::blue(), LibBoard::Polyline::flushPostscript(), flushPostscript(), DGtal::Color::green(), DGtal::Color::red(), LibBoard::Point::x, and LibBoard::Point::y.

Referenced by flushPostscript().

◆ flushSVG()

void LibBoard::GouraudTriangle::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 2265 of file Shapes.cpp.

{
    if ( ! _subdivisions ) {
        Polyline::flushSVG( stream, transform );
        return;
    }
    const Point & p0 = _path[0];
    const Point & p1 = _path[1];
    const Point & p2 = _path[2];
    Point p01( 0.5*(p0.x+p1.x), 0.5*(p0.y+p1.y) );
    DGtal::Color c01( (_color0.red() + _color1.red())/2,
               (_color0.green() + _color1.green())/2,
               (_color0.blue() + _color1.blue())/2 );
    Point p12( 0.5*(p1.x+p2.x), 0.5*(p1.y+p2.y) );
    DGtal::Color c12( (_color1.red() + _color2.red())/2,
               (_color1.green() + _color2.green())/2,
               (_color1.blue() + _color2.blue())/2 );
    Point p20( 0.5*(p2.x+p0.x), 0.5*(p2.y+p0.y) );
    DGtal::Color c20( (_color2.red() + _color0.red())/2,
               (_color2.green() + _color0.green())/2,
               (_color2.blue() + _color0.blue())/2 );
    GouraudTriangle( p0, _color0, p20, c20, p01, c01,
                     _subdivisions - 1, _depth ).flushSVG( stream, transform );
    GouraudTriangle( p1, _color1, p01, c01, p12, c12,
                     _subdivisions - 1, _depth ).flushSVG( stream, transform );
    GouraudTriangle( p2, _color2, p20, c20, p12, c12,
                     _subdivisions - 1, _depth ).flushSVG( stream, transform );
    GouraudTriangle( p01, c01, p12, c12, p20, c20,
                     _subdivisions - 1, _depth ).flushSVG( stream, transform );
}

References _color0, _color1, _color2, LibBoard::Shape::_depth, LibBoard::Polyline::_path, _subdivisions, DGtal::Color::blue(), LibBoard::Polyline::flushSVG(), flushSVG(), DGtal::Color::green(), DGtal::Color::red(), LibBoard::Point::x, and LibBoard::Point::y.

Referenced by flushSVG().

◆ flushTikZ()

void LibBoard::GouraudTriangle::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 2306 of file Shapes.cpp.

{
  // FIXME: unimplemented
  stream << "% FIXME: GouraudTriangle::flushTikZ unimplemented" << std::endl;
}

◆ name()

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

virtual

Returns the generic name of the shape (e.g., Circle, Rectangle, etc.)

Returns: object name

Reimplemented from LibBoard::Polyline.

Definition at line 2089 of file Shapes.cpp.

{
    return _name;
}

References _name.

◆ rotate() [1/2]

GouraudTriangle & LibBoard::GouraudTriangle::rotate ( double angle )

virtual

Rotate the shape around its center.

Parameters

angle The rotation angle in radian.

Returns: A reference to the shape itself.

Reimplemented from LibBoard::Polyline.

Definition at line 2158 of file Shapes.cpp.

{
    return GouraudTriangle::rotate( angle, center() );
}

References center(), and rotate().

◆ rotate() [2/2]

GouraudTriangle & LibBoard::GouraudTriangle::rotate	(	double	angle,
		const Point &	center
	)

virtual

Rotate the shape around a given center of rotation.

Parameters

angle	The rotation angle in radian.
center	The center of rotation.

Returns: A reference to the shape itself.

Reimplemented from LibBoard::Polyline.

Definition at line 2145 of file Shapes.cpp.

{
    _path.rotate( angle, rotCenter );
    return *this;
}

References LibBoard::Polyline::_path, and LibBoard::Path::rotate().

Referenced by rotate(), and rotated().

◆ rotated() [1/2]

GouraudTriangle LibBoard::GouraudTriangle::rotated ( double angle ) const

Definition at line 2164 of file Shapes.cpp.

{
    return GouraudTriangle(*this).rotate( angle, center() );
}

References center(), and rotate().

◆ rotated() [2/2]

GouraudTriangle LibBoard::GouraudTriangle::rotated	(	double	angle,
		const Point &	center
	)		const

Definition at line 2152 of file Shapes.cpp.

{
    return GouraudTriangle(*this).rotate( angle, rotCenter );
}

References rotate().

◆ scaleAll()

void LibBoard::GouraudTriangle::scaleAll ( double s )

virtual

Scales all the values (positions, dimensions, etc.) associated with the shape.

Parameters

s	The scaling factor.

Reimplemented from LibBoard::Polyline.

Definition at line 2188 of file Shapes.cpp.

{
    _path.scaleAll( s );
}

References LibBoard::Polyline::_path, and LibBoard::Path::scaleAll().

◆ scaled() [1/2]

GouraudTriangle LibBoard::GouraudTriangle::scaled ( double s ) const

Definition at line 2182 of file Shapes.cpp.

{
    return static_cast<GouraudTriangle &>( GouraudTriangle(*this).scale( s, s ) );
}

References LibBoard::Polyline::scale().

◆ scaled() [2/2]

GouraudTriangle LibBoard::GouraudTriangle::scaled	(	double	sx,
		double	sy
	)		const

Returns a scaled copy of the triangle.

Parameters

sx	Scale factor along the x axis.
sy	Scale factor along the y axis.

Returns: A scaled copy of the arrow.

Definition at line 2176 of file Shapes.cpp.

{
    return static_cast<GouraudTriangle &>( GouraudTriangle(*this).scale( sx, sy ) );
}

References LibBoard::Polyline::scale().

◆ translated()

GouraudTriangle LibBoard::GouraudTriangle::translated	(	double	dx,
		double	dy
	)		const

Returns a translated copy of the triangle.

Parameters

dx	The shift along the x axis.
dy	The shift along the y axis.

Returns: A translated copy of the line.

Definition at line 2170 of file Shapes.cpp.

{
    return static_cast<GouraudTriangle &>( GouraudTriangle(*this).translate( dx, dy ) );
}

References LibBoard::Polyline::translate().

Field Documentation

◆ _color0

DGtal::Color LibBoard::GouraudTriangle::_color0

protected

Definition at line 1328 of file Board/Shapes.h.

Referenced by flushFIG(), flushPostscript(), flushSVG(), and GouraudTriangle().

◆ _color1

DGtal::Color LibBoard::GouraudTriangle::_color1

protected

Definition at line 1329 of file Board/Shapes.h.

Referenced by flushFIG(), flushPostscript(), flushSVG(), and GouraudTriangle().

◆ _color2

DGtal::Color LibBoard::GouraudTriangle::_color2

protected

Definition at line 1330 of file Board/Shapes.h.

Referenced by flushFIG(), flushPostscript(), flushSVG(), and GouraudTriangle().

◆ _name

const std::string LibBoard::GouraudTriangle::_name

staticprivate

The generic name of the shape.

Definition at line 1325 of file Board/Shapes.h.

Referenced by name().

◆ _subdivisions

int LibBoard::GouraudTriangle::_subdivisions

protected

Definition at line 1331 of file Board/Shapes.h.

Referenced by flushPostscript(), and flushSVG().

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

Public Member Functions

Protected Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ GouraudTriangle() [1/2]

◆ GouraudTriangle() [2/2]

Member Function Documentation

◆ center()

◆ clone()

◆ flushCairo()

◆ flushFIG()

◆ flushPostscript()

◆ flushSVG()

◆ flushTikZ()

◆ name()

◆ rotate() [1/2]

◆ rotate() [2/2]

◆ rotated() [1/2]

◆ rotated() [2/2]

◆ scaleAll()

◆ scaled() [1/2]

◆ scaled() [2/2]

◆ translated()

Field Documentation

◆ _color0

◆ _color1

◆ _color2

◆ _name

◆ _subdivisions