TriangleBoundary Class Reference

#include <AreaBoundary.h>

Public Member Functions
	TriangleBoundary (Position const &pointA, Position const &pointB, Position const &pointC, bool isInverted=false)
	TriangleBoundary (DoublePosition const &pointA, DoublePosition const &pointB, DoublePosition const &pointC, 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	_c
const double	_abx
const double	_bcx
const double	_cax
const double	_aby
const double	_bcy
const double	_cay

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

TriangleBoundary::TriangleBoundary	(	Position const &	pointA,
		Position const &	pointB,
		Position const &	pointC,
		bool	isInverted = false
	)

 :
 TriangleBoundary(DoublePosition(pointA), DoublePosition(pointB), DoublePosition(pointC), isInverted) { }

TriangleBoundary::TriangleBoundary	(	DoublePosition const &	pointA,
		DoublePosition const &	pointB,
		DoublePosition const &	pointC,
		bool	isInverted = false
	)

 :
 AreaBoundary(BoundaryType::BOUNDARY_TRIANGLE, isInverted), _a(pointA), _b(pointB), _c(pointC), _abx(_b.GetDoublePositionX()-_a.GetDoublePositionX()), _bcx(_c.GetDoublePositionX()-_b.GetDoublePositionX()), _cax(_a.GetDoublePositionX() - _c.GetDoublePositionX()), _aby(_b.GetDoublePositionY()-_a.GetDoublePositionY()), _bcy(_c.GetDoublePositionY()-_b.GetDoublePositionY()), _cay(_a.GetDoublePositionY() - _c.GetDoublePositionY()) { }

Member Function Documentation

bool TriangleBoundary::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 = ((-_c.GetDoublePositionX() + pos->GetPositionX()) * _bcy - (-_c.GetDoublePositionY() + pos->GetPositionY()) * _bcx) < 0;
 bool sign3 = ((-_a.GetDoublePositionX() + pos->GetPositionX()) * _cay - (-_a.GetDoublePositionY() + pos->GetPositionY()) * _cax) < 0;

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

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Member Data Documentation

const DoublePosition TriangleBoundary::_a

private

const double TriangleBoundary::_abx

private

const double TriangleBoundary::_aby

private

const DoublePosition TriangleBoundary::_b

private

const double TriangleBoundary::_bcx

private

const double TriangleBoundary::_bcy

private

const DoublePosition TriangleBoundary::_c

private

const double TriangleBoundary::_cax

private

const double TriangleBoundary::_cay

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