CSG Functions

Functions
struct surface_s *	BuildSurfaces (void)
	Build the surface lists for the brushset. More...
struct surface_s *	CSGFaces (struct brushset_s *bs)
	Convert a brush-set to a list of clipped faces. More...
face_t *	NewFaceFromFace (const face_t *in)
struct visfacet_s *	NewFaceFromFace (const struct visfacet_s *in)
	Create a duplicate face. More...
void	SplitFace (struct visfacet_s *in, struct plane_s *split, struct visfacet_s **front, struct visfacet_s **back)
	Split a face by a plane. More...

Variables
int	brushfaces
int	csgfaces
int	csgmergefaces
face_t *	inside
face_t *	outside
struct visfacet_s *	validfaces [MAX_MAP_PLANES]
face_t *	validfaces [MAX_MAP_PLANES]

Detailed Description

Function Documentation

surface_t * BuildSurfaces

(

void

)

Build the surface lists for the brushset.

Each plane still with faces after clipping will have one surface, and each surface will list the faces on that plane.

Returns

Chain of all the external surfaces with one or more visible faces.

surface_t * CSGFaces

(

struct brushset_s *

bs

)

Convert a brush-set to a list of clipped faces.

The brushes of the brush set will be clipped against each other.

Parameters

bs	The brush-set to convert.

Returns

list of surfaces containing all of the faces

face_t* NewFaceFromFace

(

const face_t *

in

)

struct visfacet_s* NewFaceFromFace

(

const struct visfacet_s *

in

)

Create a duplicate face.

Duplicates the non point information of a face.

Parameters

in	The face to duplicate.

Returns

The new face.

void SplitFace	(	struct visfacet_s *	in,
		struct plane_s *	split,
		struct visfacet_s **	front,
		struct visfacet_s **	back
	)

Split a face by a plane.

Parameters

in	The face to split.
split	The plane by which to split the face.
front	Set to the new face repesenting the part of the input face that is in front of the plane, or NULL if there is no front portion.
back	Set to the new face repesenting the part of the input face that is behind the plane, or NULL if there is no back portion.

Note

A face entirely on the plane is considered to be behind the plane.

The face represented by in becomes invalid. If either front or back is NULL, then no split has occurred and the other will be set to in.

Variable Documentation

int brushfaces

int csgfaces

int csgmergefaces

face_t* inside

face_t * outside

struct visfacet_s* validfaces[MAX_MAP_PLANES]

face_t* validfaces[MAX_MAP_PLANES]