BoundingBox Class Reference

Bounding box in 3d ambient space. More...

#include <bounding_box.hh>

Collaboration diagram for BoundingBox:

Public Types
typedef Space< dimension >::Point	Point
	Currently we assume. More...

Public Member Functions
	TYPEDEF_ERR_INFO (EI_split_point, double)
	TYPEDEF_ERR_INFO (EI_interval_left, double)
	TYPEDEF_ERR_INFO (EI_interval_right, double)
	DECLARE_EXCEPTION (ExcSplitting,<< "Split point "<< EI_split_point::val<< "out of bounds: <"<< EI_interval_left::val<< ", "<< EI_interval_right::val<< ">\n")
	BoundingBox ()
	BoundingBox (const Point &min)
	BoundingBox (const Point &min, const Point &max)
	BoundingBox (const vector< Point > &points)
void	set_max (unsigned int axis, double max)
void	set_min (unsigned int axis, double min)
const Point &	min () const
const Point &	max () const
double	min (unsigned int axis) const
double	max (unsigned int axis) const
double	size (unsigned int axis) const
Point	center () const
double	projection_center (unsigned int axis) const
bool	contains_point (const Point &point) const
bool	intersect (const BoundingBox &b2) const
bool	projection_lt (unsigned int axis, double value) const
bool	projection_gt (unsigned int axis, double value) const
void	split (unsigned int axis, double splitting_point, BoundingBox &left, BoundingBox &right) const
void	expand (const Point &point)
unsigned char	longest_axis () const
Point	project_point (const Point &point) const

Static Public Attributes
static const unsigned int	dimension = 3
	Currently we set dimension to 3. More...
static const double	epsilon = 64*numeric_limits<double>::epsilon()
	stabilization parameter More...

Private Attributes
Point	min_vertex_
	minimal coordinates of bounding box More...
Point	max_vertex_
	maximal coordinates of bounding box More...

Detailed Description

Bounding box in 3d ambient space.

Primary intention is usage in BIHTree and various speedups of non-compatible intersections.

Copy constructor and assignment are default provided by compiler. These can be used to set bounds latter on without particular method to this end:

BoundingBox box;            // non-initialized box
box=BoundingBox( arma::vec3("0 1 2"), arma::vec3("4 5 6") );

Don;t worry about performance, all is inlined.

Definition at line 45 of file bounding_box.hh.

Member Typedef Documentation

typedef Space<dimension>::Point BoundingBox::Point

Currently we assume.

Definition at line 59 of file bounding_box.hh.

Constructor & Destructor Documentation

BoundingBox::BoundingBox ( )

inline

Default constructor. No initialization of vertices. Be very careful using this. One necessary usage is vector of BoundigBox.

Definition at line 67 of file bounding_box.hh.

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BoundingBox::BoundingBox ( const Point &  min )

inline

Constructor for point box.

Definition at line 72 of file bounding_box.hh.

BoundingBox::BoundingBox ( const Point &  min, const Point &  max  )

inline

Constructor.

From given minimal and maximal vertex.

Definition at line 81 of file bounding_box.hh.

BoundingBox::BoundingBox

(

const vector< Point > &

points

)

Constructor.

Make bounding box for set of points.

Definition at line 25 of file bounding_box.cc.

Member Function Documentation

Point BoundingBox::center ( ) const

inline

Return center of the bounding box.

Definition at line 152 of file bounding_box.hh.

bool BoundingBox::contains_point ( const Point &  point ) const

inline

Returns true is the box element contains point

Parameters

point

Testing point

Returns

True if box element contains point

Definition at line 171 of file bounding_box.hh.

BoundingBox::DECLARE_EXCEPTION

(

ExcSplitting

)

void BoundingBox::expand ( const Point &  point )

inline

Expand bounding box to contain also given point.

Definition at line 239 of file bounding_box.hh.

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bool BoundingBox::intersect ( const BoundingBox &  b2 ) const

inline

Returns true if two bounding boxes have intersection.

This serves as an estimate of intersection of elements. To make it safe (do not exclude possible intersection) for 1d and 2d elements aligned with axes, we use some tolerance. Since this tolerance is fixed, there could be problem with highly refined meshes (get false positive result).

Definition at line 189 of file bounding_box.hh.

unsigned char BoundingBox::longest_axis ( ) const

inline

Return index of the axis in which the box has longest projection.

Definition at line 249 of file bounding_box.hh.

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const Point& BoundingBox::max ( ) const

inline

Return maximal vertex of the bounding box.

Definition at line 122 of file bounding_box.hh.

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double BoundingBox::max ( unsigned int  axis ) const

inline

Return maximal value on given axis.

Definition at line 136 of file bounding_box.hh.

const Point& BoundingBox::min ( ) const

inline

Return minimal vertex of the bounding box.

Definition at line 115 of file bounding_box.hh.

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double BoundingBox::min ( unsigned int  axis ) const

inline

Return minimal value on given axis.

Definition at line 129 of file bounding_box.hh.

Point BoundingBox::project_point ( const Point &  point ) const

inline

Project point to bounding box.

If point is in bounding box, returns its.

Definition at line 261 of file bounding_box.hh.

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double BoundingBox::projection_center ( unsigned int  axis ) const

inline

Return center of projection of the bounding box to given axis. Axis coding is: 0 - axis x, 1 - axis y, 2 - axis z.

Definition at line 160 of file bounding_box.hh.

bool BoundingBox::projection_gt ( unsigned int  axis, double  value  ) const

inline

Returns true if projection of the box to axis is an interval greater then (with tolerance) to given value.

Definition at line 211 of file bounding_box.hh.

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bool BoundingBox::projection_lt ( unsigned int  axis, double  value  ) const

inline

Returns true if projection of the box to axis is an interval less then (with tolerance) to given value.

Definition at line 202 of file bounding_box.hh.

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void BoundingBox::set_max ( unsigned int  axis, double  max  )

inline

Set maximum in given axis.

Definition at line 97 of file bounding_box.hh.

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void BoundingBox::set_min ( unsigned int  axis, double  min  )

inline

Set minimum on given axis.

Definition at line 106 of file bounding_box.hh.

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double BoundingBox::size ( unsigned int  axis ) const

inline

Return size of the box in given axis.

Definition at line 144 of file bounding_box.hh.

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void BoundingBox::split ( unsigned int  axis, double  splitting_point, BoundingBox &  left, BoundingBox &  right  ) const

inline

Split box into two boxes along axis by the plane going through splitting_point on the axis.

Definition at line 220 of file bounding_box.hh.

BoundingBox::TYPEDEF_ERR_INFO	(	EI_split_point	,
		double
	)

BoundingBox::TYPEDEF_ERR_INFO	(	EI_interval_left	,
		double
	)

BoundingBox::TYPEDEF_ERR_INFO	(	EI_interval_right	,
		double
	)

Member Data Documentation

const unsigned int BoundingBox::dimension = 3

static

Currently we set dimension to 3.

Definition at line 55 of file bounding_box.hh.

const double BoundingBox::epsilon = 64*numeric_limits<double>::epsilon()

static

stabilization parameter

Definition at line 57 of file bounding_box.hh.

Point BoundingBox::max_vertex_

private

maximal coordinates of bounding box

Definition at line 277 of file bounding_box.hh.

Point BoundingBox::min_vertex_

private

minimal coordinates of bounding box

Definition at line 275 of file bounding_box.hh.

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

• /opt/flow123d/flow123d/src/mesh/bounding_box.hh
• /opt/flow123d/flow123d/src/mesh/bounding_box.cc