dw::core::Polygon Class Reference

dw::core::Shape implemtation for polygons. More...

#include <types.hh>

Public Member Functions
	Polygon ()
	~Polygon ()
void	draw (core::View *view, core::style::Style *style, int x, int y)
void	addPoint (int x, int y)
bool	isPointWithin (int x, int y)
Public Member Functions inherited from lout::object::Object
virtual	~Object ()
	The destructor is defined as virtual (but not abstract), so that destruction of Object's works properly.
virtual bool	equals (Object *other)
	Returns, whether two objects are equal.
virtual int	hashValue ()
	Return a hash value for the object.
virtual Object *	clone ()
	Return an exact copy of the object.
virtual void	intoStringBuffer (misc::StringBuffer *sb)
	Store a textual representation of the object in a misc::StringBuffer.
const char *	toString ()
	Use object::Object::intoStringBuffer to return a textual representation of the object.
virtual size_t	sizeOf ()
	Return the number of bytes, this object totally uses.

Private Member Functions
int	zOfVectorProduct (int x1, int y1, int x2, int y2)
	Return the z-coordinate of the vector product of two vectors, whose z-coordinate is 0 (so that x and y of the vector product is 0, too).
bool	linesCross0 (int ax1, int ay1, int ax2, int ay2, int bx1, int by1, int bx2, int by2)
	Return, whether the line, limited by (ax1, ay1) and (ax2, ay2), crosses the unlimited line, determined by two points (bx1, by1) and (bx2, by2).
bool	linesCross (int ax1, int ay1, int ax2, int ay2, int bx1, int by1, int bx2, int by2)
	Return, whether the line, limited by (ax1, ay1) and (ax2, ay2), crosses the line, limited by (bx1, by1) and (bx2, by2).

Private Attributes
lout::misc::SimpleVector< Point > *	points
int	minx
int	miny
int	maxx
int	maxy

Detailed Description

dw::core::Shape implemtation for polygons.

Definition at line 104 of file types.hh.

Constructor & Destructor Documentation

Polygon()

dw::core::Polygon::Polygon

(

)

Definition at line 124 of file types.cc.

References maxx, maxy, minx, miny, and points.

~Polygon()

dw::core::Polygon::~Polygon

(

)

Definition at line 131 of file types.cc.

References points.

Member Function Documentation

addPoint()

void dw::core::Polygon::addPoint	(	int	x,
		int	y
	)

Definition at line 156 of file types.cc.

References lout::misc::max(), maxx, maxy, lout::misc::min(), minx, miny, and points.

Referenced by Html_tag_content_area(), and main().

draw()

void dw::core::Polygon::draw ( core::View *  view, core::style::Style *  style, int  x, int  y  )

virtual

Implements dw::core::Shape.

Definition at line 139 of file types.cc.

References dw::core::style::StyleAttrs::color, dw::core::View::drawPolygon(), points, dw::core::style::Color::SHADING_NORMAL, dw::core::Point::x, and dw::core::Point::y.

isPointWithin()

bool dw::core::Polygon::isPointWithin ( int  x, int  y  )

virtual

Implements dw::core::Shape.

Definition at line 200 of file types.cc.

References linesCross(), maxx, maxy, minx, miny, and points.

Referenced by main().

linesCross()

bool dw::core::Polygon::linesCross ( int  ax1, int  ay1, int  ax2, int  ay2, int  bx1, int  by1, int  bx2, int  by2  )

private

Return, whether the line, limited by (ax1, ay1) and (ax2, ay2), crosses the line, limited by (bx1, by1) and (bx2, by2).

Definition at line 189 of file types.cc.

References _MSG, and linesCross0().

Referenced by isPointWithin().

linesCross0()

bool dw::core::Polygon::linesCross0 ( int  ax1, int  ay1, int  ax2, int  ay2, int  bx1, int  by1, int  bx2, int  by2  )

private

Return, whether the line, limited by (ax1, ay1) and (ax2, ay2), crosses the unlimited line, determined by two points (bx1, by1) and (bx2, by2).

TODO Some more description

Definition at line 173 of file types.cc.

References zOfVectorProduct().

Referenced by linesCross().

zOfVectorProduct()

int dw::core::Polygon::zOfVectorProduct ( int  x1, int  y1, int  x2, int  y2  )

inlineprivate

Return the z-coordinate of the vector product of two vectors, whose z-coordinate is 0 (so that x and y of the vector product is 0, too).

Definition at line 115 of file types.hh.

Referenced by linesCross0().

Member Data Documentation

maxx

int dw::core::Polygon::maxx

private

Definition at line 108 of file types.hh.

Referenced by addPoint(), isPointWithin(), and Polygon().

maxy

int dw::core::Polygon::maxy

private

Definition at line 108 of file types.hh.

Referenced by addPoint(), isPointWithin(), and Polygon().

minx

int dw::core::Polygon::minx

private

Definition at line 108 of file types.hh.

Referenced by addPoint(), isPointWithin(), and Polygon().

miny

int dw::core::Polygon::miny

private

Definition at line 108 of file types.hh.

Referenced by addPoint(), isPointWithin(), and Polygon().

points

lout::misc::SimpleVector<Point>* dw::core::Polygon::points

private

Definition at line 107 of file types.hh.

Referenced by addPoint(), draw(), isPointWithin(), Polygon(), and ~Polygon().

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

• dw/types.hh
• dw/types.cc