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/**
* @file
* @brief API fdpgen/fdp.h: @ref fdp_init_node_edge, @ref fdp_cleanup
*/
/*************************************************************************
* 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
*************************************************************************/
/* fdpinit.c:
* Written by Emden R. Gansner
*
* Mostly boilerplate initialization and cleanup code.
*/
/* uses PRIVATE interface */
#define FDP_PRIVATE 1
#include <fdpgen/tlayout.h>
#include <neatogen/neatoprocs.h>
#include <stdbool.h>
#include <util/agxbuf.h>
#include <util/alloc.h>
static void initialPositions(graph_t * g)
{
int i;
node_t *np;
attrsym_t *possym;
attrsym_t *pinsym;
double *pvec;
char *p;
char c;
possym = agattr_text(g,AGNODE, "pos", NULL);
if (!possym)
return;
pinsym = agattr_text(g,AGNODE, "pin", NULL);
for (i = 0; (np = GD_neato_nlist(g)[i]); i++) {
p = agxget(np, possym);
if (p[0]) {
pvec = ND_pos(np);
c = '\0';
if (sscanf(p, "%lf,%lf%c", pvec, pvec + 1, &c) >= 2) {
if (PSinputscale > 0.0) {
int j;
for (j = 0; j < NDIM; j++)
pvec[j] = pvec[j] / PSinputscale;
}
ND_pinned(np) = P_SET;
if (c == '!'
|| (pinsym && mapbool(agxget(np, pinsym))))
ND_pinned(np) = P_PIN;
} else
fprintf(stderr,
"Warning: node %s, position %s, expected two floats\n",
agnameof(np), p);
}
}
}
/* init_edge:
*/
static void init_edge(edge_t * e, attrsym_t * E_len)
{
agbindrec(e, "Agedgeinfo_t", sizeof(Agedgeinfo_t), true); //node custom data
ED_factor(e) = late_double(e, E_weight, 1.0, 0.0);
ED_dist(e) = late_double(e, E_len, fdp_parms->K, 0.0);
common_init_edge(e);
}
static void init_node(node_t * n)
{
common_init_node(n);
ND_pos(n) = gv_calloc(GD_ndim(agraphof(n)), sizeof(double));
gv_nodesize(n, GD_flip(agraphof(n)));
}
void fdp_init_node_edge(graph_t * g)
{
attrsym_t *E_len;
node_t *n;
edge_t *e;
int nn;
int i;
aginit(g, AGNODE, "Agnodeinfo_t", sizeof(Agnodeinfo_t), true);
processClusterEdges(g);
/* Get node count after processClusterEdges(), as this function may
* add new nodes.
*/
nn = agnnodes(g);
GD_neato_nlist(g) = gv_calloc(nn + 1, sizeof(node_t*));
for (i = 0, n = agfstnode(g); n; n = agnxtnode(g, n)) {
init_node (n);
GD_neato_nlist(g)[i] = n;
ND_id(n) = i++;
}
E_len = agattr_text(g,AGEDGE, "len", NULL);
for (n = agfstnode(g); n; n = agnxtnode(g, n)) {
for (e = agfstout(g, n); e; e = agnxtout(g, e)) {
init_edge(e, E_len);
}
}
initialPositions(g);
}
static void cleanup_subgs(graph_t * g)
{
graph_t *subg;
int i;
for (i = 1; i <= GD_n_cluster(g); i++) {
subg = GD_clust(g)[i];
free_label(GD_label(subg));
if (GD_alg(subg)) {
free(PORTS(subg));
free(GD_alg(subg));
}
cleanup_subgs(subg);
}
free (GD_clust(g));
}
static void fdp_cleanup_graph(graph_t * g)
{
cleanup_subgs(g);
free(GD_neato_nlist(g));
free(GD_alg(g));
}
void fdp_cleanup(graph_t * g)
{
node_t *n;
edge_t *e;
for (n = agfstnode(g); n; n = agnxtnode(g, n)) {
for (e = agfstout(g, n); e; e = agnxtout(g, e)) {
gv_cleanup_edge(e);
}
gv_cleanup_node(n);
}
fdp_cleanup_graph(g);
}
/**
* @dir lib/fdpgen
* @brief [Force-Directed Placement](https://en.wikipedia.org/wiki/Force-directed_graph_drawing) layout engine, API fdpgen/fdp.h
* @ingroup engines
*
* [FDP layout user manual](https://graphviz.org/docs/layouts/fdp/)
*
* Other @ref engines
*/
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