Brush Functions

Data Structures
struct	brush_s
struct	brushset_s

Macros
#define	ANGLEEPSILON   0.00001
#define	DISTEPSILON   0.01
#define	MAX_HULL_EDGES   MAX_HULL_POINTS * 2
#define	MAX_HULL_POINTS   256
#define	NUM_CONTENTS   2
#define	NUM_HULLS   2
#define	ZERO_EPSILON   0.001

Typedefs
typedef struct brush_s	brush_t
typedef struct brushset_s	brushset_t

Functions
brush_t *	AllocBrush (void)
	Allocate a new brush. More...
brushset_t *	Brush_LoadEntity (entity_t *ent, int hullnum)
	Load the brushes from the entity. More...
int	FindPlane (const plane_t *dplane, int *side)
	Add a plane to the global list of planes. More...
int	NormalizePlane (plane_t *dp)
	Make the plane canonical. More...
int	PlaneTypeForNormal (const vec3_t normal)
	Determine the primary axis of the normal. More...

Variables
face_t *	brush_faces
vec3_t	brush_maxs
vec3_t	brush_mins
mface_t	faces [MAX_FACES]
vec3_t	hull_corners [MAX_HULL_POINTS *8]
int	hull_edges [MAX_HULL_EDGES][2]
vec3_t	hull_points [MAX_HULL_POINTS]
vec3_t	hull_size [3][2]
int	num_hull_edges
int	num_hull_points
int	numbrushfaces
int	numbrushplanes
int	numbrushplanes
plane_t	planes [MAX_MAP_PLANES]
plane_t	planes [MAX_MAP_PLANES]

Detailed Description

Macro Definition Documentation

#define ANGLEEPSILON   0.00001

#define DISTEPSILON   0.01

#define MAX_HULL_EDGES   MAX_HULL_POINTS * 2

#define MAX_HULL_POINTS   256

#define NUM_CONTENTS   2

#define NUM_HULLS   2

#define ZERO_EPSILON   0.001

Typedef Documentation

typedef struct brush_s brush_t

typedef struct brushset_s brushset_t

Function Documentation

brush_t * AllocBrush

(

void

)

Allocate a new brush.

Returns

Pointer to the new brush.

brushset_t * Brush_LoadEntity	(	entity_t *	ent,
		int	hullnum
	)

Load the brushes from the entity.

Parameters

ent	The entity from which to load the brushes.
hullnum	The number of the hull for which to load the brushes.

Returns

The brush set holding the brushes loaded from the entity.

int FindPlane	(	const plane_t *	dplane,
		int *	side
	)

Add a plane to the global list of planes.

Make the plane canonical, and add it to the global list of planes if it does not duplicate a plane that is already in the list. If the plane is flipped while being made canonical, side will be set to 1, otherwise side will be 0.

Parameters

dplane	The plane to add.
side	The side of the plane that will be front.

Returns

global plane number.

int NormalizePlane

(

plane_t *

dp

)

Make the plane canonical.

A cononical plane is one whose normal points towards +inf on its primary axis. The primary axis is that which has the largest magnitude of the vector's components.

Parameters

dp	The plane to make canonical.

Returns

1 if the plane was flipped, otherwise 0.

int PlaneTypeForNormal

(

const vec3_t

normal

)

Determine the primary axis of the normal.

Parameters

normal

Must be canonical.

Variable Documentation

face_t* brush_faces

vec3_t brush_maxs

vec3_t brush_mins

mface_t faces[MAX_FACES]

vec3_t hull_corners[MAX_HULL_POINTS *8]

int hull_edges[MAX_HULL_EDGES][2]

vec3_t hull_points[MAX_HULL_POINTS]

vec3_t hull_size[3][2]

Initial value:

= {
    {{0, 0, 0}, {0, 0, 0}},
    {{-16, -16, -32}, {16, 16, 24}},
    {{-32, -32, -64}, {32, 32, 24}}
}

int num_hull_edges

int num_hull_points

int numbrushfaces

int numbrushplanes

int numbrushplanes

plane_t planes[MAX_MAP_PLANES]

plane_t planes[MAX_MAP_PLANES]