dw::core::Polygon Class Reference

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

#include <types.hh>

List of all members.

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)
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

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Detailed Description

dw::core::Shape implemtation for polygons.

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Constructor & Destructor Documentation

dw::core::Polygon::Polygon

(

)

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

dw::core::Polygon::~Polygon

(

)

References points.

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Member Function Documentation

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

References lout::misc::SimpleVector< T >::getRef(), lout::misc::SimpleVector< T >::increase(), lout::misc::max(), maxx, maxy, lout::misc::min(), minx, miny, points, and lout::misc::SimpleVector< T >::size().

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

Implements dw::core::Shape.

References dw::core::style::StyleAttrs::color, dw::core::View::drawPolygon(), lout::misc::SimpleVector< T >::getRef(), points, dw::core::style::Color::SHADING_NORMAL, lout::misc::SimpleVector< T >::size(), dw::core::Point::x, and dw::core::Point::y.

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

Implements dw::core::Shape.

References lout::misc::SimpleVector< T >::getRef(), linesCross(), maxx, maxy, minx, miny, points, lout::misc::SimpleVector< T >::size(), dw::core::Point::x, and dw::core::Point::y.

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).

References linesCross0().

Referenced by isPointWithin().

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

References zOfVectorProduct().

Referenced by linesCross().

int dw::core::Polygon::zOfVectorProduct	(	int	x1,
		int	y1,
		int	x2,
		int	y2
	)			[inline, private]

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).

Referenced by linesCross0().

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Member Data Documentation

int dw::core::Polygon::maxx [private]

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

int dw::core::Polygon::maxy [private]

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

int dw::core::Polygon::minx [private]

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

int dw::core::Polygon::miny [private]

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

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

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