hedges.c File Reference

#include <assert.h>
#include <neatogen/hedges.h>
#include <common/render.h>
#include <stdbool.h>
#include <stdlib.h>
#include <util/alloc.h>
#include <util/arena.h>

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Macros
#define	DELETED   -2

Functions
void	ELcleanup (el_state_t *st)
void	ELinitialize (el_state_t *st)
Site *	hintersect (Halfedge *el1, Halfedge *el2)
static int	right_of (Halfedge *el, Point *p)
Halfedge *	HEcreate (el_state_t *st, Edge *e, char pm)
void	ELinsert (Halfedge *lb, Halfedge *new)
static Halfedge *	ELgethash (el_state_t *st, int b)
static int	clamp (int lower, double v, int upper)
Halfedge *	ELleftbnd (el_state_t *st, Point *p)
void	ELdelete (Halfedge *he)
Halfedge *	ELright (Halfedge *he)
Halfedge *	ELleft (Halfedge *he)
Site *	leftreg (Halfedge *he)
Site *	rightreg (Halfedge *he)

Macro Definition Documentation

DELETED

#define DELETED   -2

Definition at line 19 of file hedges.c.

Function Documentation

clamp()

static int clamp ( int  lower, double  v, int  upper  )

static

convert a double to an int, between bounds

Parameters

lower	Lower bound to limit to
v	Value to convert
upper	Upper bound to limit to

Returns

A converted value in the range [lower, upper]

Definition at line 172 of file hedges.c.

Referenced by ELleftbnd().

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ELcleanup()

void ELcleanup

(

el_state_t *

st

)

Definition at line 21 of file hedges.c.

References el_state_t::allocated, free(), gv_arena_reset(), and el_state_t::hash.

Referenced by voronoi().

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ELdelete()

void ELdelete

(

Halfedge *

he

)

Definition at line 221 of file hedges.c.

References DELETED, Halfedge::ELedge, Halfedge::ELleft, and Halfedge::ELright.

Referenced by voronoi().

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ELgethash()

static Halfedge * ELgethash ( el_state_t *  st, int  b  )

static

Definition at line 151 of file hedges.c.

References DELETED, Halfedge::ELedge, el_state_t::hash, el_state_t::hashsize, and NULL.

Referenced by ELleftbnd().

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ELinitialize()

void ELinitialize

(

el_state_t *

st

)

Definition at line 26 of file hedges.c.

References Halfedge::ELleft, Halfedge::ELright, gv_calloc(), el_state_t::hash, el_state_t::hashsize, HEcreate(), el_state_t::leftend, NULL, el_state_t::rightend, and sqrt_nsites.

Referenced by voronoi().

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ELinsert()

void ELinsert	(	Halfedge *	lb,
		Halfedge *	new
	)

Definition at line 142 of file hedges.c.

References Halfedge::ELleft, and Halfedge::ELright.

Referenced by voronoi().

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ELleft()

Halfedge * ELleft

(

Halfedge *

he

)

Definition at line 234 of file hedges.c.

References Halfedge::ELleft.

Referenced by voronoi().

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ELleftbnd()

Halfedge * ELleftbnd	(	el_state_t *	st,
		Point *	p
	)

Definition at line 183 of file hedges.c.

References clamp(), deltax, ELgethash(), Halfedge::ELleft, Halfedge::ELright, el_state_t::hash, el_state_t::hashsize, el_state_t::leftend, NULL, right_of(), el_state_t::rightend, Point::x, and xmin.

Referenced by voronoi().

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ELright()

Halfedge * ELright

(

Halfedge *

he

)

Definition at line 229 of file hedges.c.

References Halfedge::ELright.

Referenced by voronoi().

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HEcreate()

Halfedge * HEcreate	(	el_state_t *	st,
		Edge *	e,
		char	pm
	)

Definition at line 132 of file hedges.c.

References el_state_t::allocated, ARENA_NEW, Halfedge::ELedge, Halfedge::ELpm, NULL, Halfedge::PQnext, and Halfedge::vertex.

Referenced by ELinitialize(), and voronoi().

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hintersect()

Site * hintersect	(	Halfedge *	el1,
		Halfedge *	el2
	)

Definition at line 44 of file hedges.c.

References Edge::a, Edge::b, Edge::c, Site::coord, Halfedge::ELedge, Halfedge::ELpm, getsite(), le, NULL, re, Site::refcnt, Edge::reg, Point::x, and Point::y.

Referenced by voronoi().

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leftreg()

Site * leftreg

(

Halfedge *

he

)

Definition at line 240 of file hedges.c.

References bottomsite, Halfedge::ELedge, Halfedge::ELpm, le, NULL, re, and Edge::reg.

Referenced by voronoi().

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right_of()

static int right_of ( Halfedge *  el, Point *  p  )

static

Definition at line 87 of file hedges.c.

References Edge::a, Edge::b, Edge::c, coord(), Site::coord, Halfedge::ELedge, Halfedge::ELpm, le, re, Edge::reg, pointf_s::x, Point::x, and Point::y.

Referenced by ELleftbnd().

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rightreg()

Site * rightreg

(

Halfedge *

he

)

Definition at line 247 of file hedges.c.

References bottomsite, Halfedge::ELedge, Halfedge::ELpm, le, NULL, re, and Edge::reg.

Referenced by voronoi().

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