bbox.h File Reference

Axis Aligned Bounding Box. More...

#include <lescegra/util/object.h>
#include <lescegra/util/vertex.h>
#include <lescegra/util/matrix.h>
#include <lescegra/util/frustum.h>

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Data Structures
struct	LsgBBox
	Axis Aligned Bounding Box. More...
Defines
#define	LSG_BBOX_H   1
Functions
LsgBBox *	LsgBBox_create (void)
void	LsgBBox_init (LsgBBox *self)
void	LsgBBox_clear (LsgBBox *self)
void	LsgBBox_combine (LsgBBox *self, const LsgBBox *box)
void	LsgBBox_include (LsgBBox *self, Vertex v)
void	LsgBBox_transform (LsgBBox *self, Matrix tm)
int	LsgBBox_contains (LsgBBox *self, Vertex v)
int	LsgBBox_visible (LsgBBox *self, LsgFrustum *frustum)
void	LsgBBox_nearest (LsgBBox *self, Vertex v, Vertex n)

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Detailed Description

Axis Aligned Bounding Box.

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Function Documentation

LsgBBox* LsgBBox_create (  void   )

Allocate and initialize a bounding box.

void LsgBBox_init (  LsgBBox *  self  )

Constructor method for LsgBBox. Initially set the bounding box state to invalid. Parameters: self  The instance variable

void LsgBBox_clear (  LsgBBox *  self  )

Clear the bounding box volume. Set the bounding box state to invalid. Min and max are undefined. Parameters: self  The instance variable

void LsgBBox_combine (  LsgBBox *  self, const LsgBBox *  box )

Include another bounding box in the bounded volume. Parameters: self  The instance variable box  The other bounding box

void LsgBBox_include (  LsgBBox *  self, Vertex  v )

Add a vertex to the bounded volume. Parameters: self  The instance variable v  The vertex to add to the bounded volume

void LsgBBox_transform (  LsgBBox *  self, Matrix  tm )

Transform the bounding box with a matrix. Parameters: self  The instance variable tm  The transformation matrix

int LsgBBox_contains (  LsgBBox *  self, Vertex  v )

Check if the bounding box contains a vertex. Parameters: self  The instance variable v  The vertex to check Returns: 1 if the vertex v is contained in the volume bound by self, 0 otherwise

int LsgBBox_visible (  LsgBBox *  self, LsgFrustum *  frustum )

Check if any part of the bounding box is inside a given view frustum. Parameters: self  The instance variable frustum  The view frustum Returns: 1 if any part of the volume bound by self intersects with the view frustum, 0 otherwise

void LsgBBox_nearest (  LsgBBox *  self, Vertex  v, Vertex  n )

Compute the point nearest to a given vertex that is still inside the bounded volume. Parameters: self  The instance variable v  Some vertex n  The buffer to hold the vertex nearest to v but still inside the bounded volume

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(c) 2003, by Enno Cramer
generated on 9 Jul 2003
lescegra - doxygen