ParallelogramBoundary Class Reference

#include <AreaBoundary.h>

Public Member Functions
	ParallelogramBoundary (Position const &cornerA, Position const &cornerB, Position const &cornerD, bool isInverted=false)
	ParallelogramBoundary (DoublePosition const &cornerA, DoublePosition const &cornerB, DoublePosition const &cornerD, bool isInverted=false)
Public Member Functions inherited from AreaBoundary
virtual	~AreaBoundary ()
BoundaryType	GetBoundaryType () const
bool	IsWithinBoundary (const Position *pos) const

Protected Member Functions
bool	IsWithinBoundaryArea (const Position *pos) const override
Protected Member Functions inherited from AreaBoundary
	AreaBoundary (BoundaryType bType, bool isInverted)

Private Attributes
const DoublePosition	_a
const DoublePosition	_b
const DoublePosition	_d
const DoublePosition	_c
const double	_abx
const double	_dax
const double	_aby
const double	_day

Additional Inherited Members
Public Types inherited from AreaBoundary
enum	BoundaryType {   BOUNDARY_RECTANGLE, BOUNDARY_CIRCLE, BOUNDARY_ELLIPSE, BOUNDARY_TRIANGLE,   BOUNDARY_PARALLELOGRAM, BOUNDARY_Z_RANGE }
Protected Attributes inherited from AreaBoundary
const BoundaryType	m_boundaryType
bool	m_isInvertedBoundary

Constructor & Destructor Documentation

ParallelogramBoundary::ParallelogramBoundary	(	Position const &	cornerA,
		Position const &	cornerB,
		Position const &	cornerD,
		bool	isInverted = false
	)

 :
 ParallelogramBoundary(DoublePosition(cornerA), DoublePosition(cornerB), DoublePosition(cornerD), isInverted) { }

ParallelogramBoundary::ParallelogramBoundary	(	DoublePosition const &	cornerA,
		DoublePosition const &	cornerB,
		DoublePosition const &	cornerD,
		bool	isInverted = false
	)

 :
 AreaBoundary(BoundaryType::BOUNDARY_PARALLELOGRAM, isInverted), _a(cornerA), _b(cornerB), _d(cornerD), _c(DoublePosition(_d.GetDoublePositionX() + (_b.GetDoublePositionX() - _a.GetDoublePositionX()), _d.GetDoublePositionY() + (_b.GetDoublePositionY() - _a.GetDoublePositionY()))), _abx(_b.GetDoublePositionX() - _a.GetDoublePositionX()), _dax(_a.GetDoublePositionX() - _d.GetDoublePositionX()), _aby(_b.GetDoublePositionY() - _a.GetDoublePositionY()), _day(_a.GetDoublePositionY() - _d.GetDoublePositionY()) { }

Member Function Documentation

bool ParallelogramBoundary::IsWithinBoundaryArea ( const Position *  pos ) const

overrideprotectedvirtual

Implements AreaBoundary.

{
 if (!pos)
 return false;

 // half-plane signs
 bool sign1 = ((-_b.GetDoublePositionX() + pos->GetPositionX()) * _aby - (-_b.GetDoublePositionY() + pos->GetPositionY()) * _abx) < 0;
 bool sign2 = ((-_a.GetDoublePositionX() + pos->GetPositionX()) * _day - (-_a.GetDoublePositionY() + pos->GetPositionY()) * _dax) < 0;
 bool sign3 = ((-_d.GetDoublePositionY() + pos->GetPositionY()) * _abx - (-_d.GetDoublePositionX() + pos->GetPositionX()) * _aby) < 0; // AB = -CD
 bool sign4 = ((-_c.GetDoublePositionY() + pos->GetPositionY()) * _dax - (-_c.GetDoublePositionX() + pos->GetPositionX()) * _day) < 0; // DA = -BC

 // if all signs are equal, the point is inside
 return ((sign1 == sign2) && (sign2 == sign3) && (sign3 == sign4));
}

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Member Data Documentation

const DoublePosition ParallelogramBoundary::_a

private

const double ParallelogramBoundary::_abx

private

const double ParallelogramBoundary::_aby

private

const DoublePosition ParallelogramBoundary::_b

private

const DoublePosition ParallelogramBoundary::_c

private

const DoublePosition ParallelogramBoundary::_d

private

const double ParallelogramBoundary::_dax

private

const double ParallelogramBoundary::_day

private

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

• src/server/game/Maps/AreaBoundary.h
• src/server/game/Maps/AreaBoundary.cpp