1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/*************************************************************************
* Copyright (c) 2011 AT&T Intellectual Property
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-v10.html
*
* Contributors: Details at https://graphviz.org
*************************************************************************/
#pragma once
#include <util/api.h>
#include <util/arena.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <neatogen/site.h>
#include <neatogen/edges.h>
typedef struct Halfedge {
struct Halfedge *ELleft, *ELright;
Edge *ELedge;
char ELpm;
Site *vertex;
double ystar;
struct Halfedge *PQnext;
} Halfedge;
typedef struct {
arena_t allocated; ///< outstanding dynamic allocations
int hashsize;
Halfedge **hash;
Halfedge *leftend;
Halfedge *rightend;
} el_state_t;
PRIVATE void ELinitialize(el_state_t *);
PRIVATE void ELcleanup(el_state_t *);
PRIVATE Site *hintersect(Halfedge *, Halfedge *, arena_t *);
PRIVATE Halfedge *HEcreate(el_state_t *, Edge *, char);
PRIVATE void ELinsert(Halfedge *, Halfedge *);
PRIVATE Halfedge *ELleftbnd(el_state_t *, Point *);
PRIVATE void ELdelete(Halfedge *);
PRIVATE Halfedge *ELleft(Halfedge *), *ELright(Halfedge *);
PRIVATE Site *leftreg(Halfedge *), *rightreg(Halfedge *);
#ifdef __cplusplus
}
#endif
|
