/* getPos:
*/
static real *getPos(Agraph_t * g, spring_electrical_control ctrl)
{
Agnode_t *n;
real *pos = N_NEW(Ndim * agnnodes(g), real);
int ix, i;
if (agfindnodeattr(g, "pos") == NULL)
return pos;
for (n = agfstnode(g); n; n = agnxtnode(g, n)) {
i = ND_id(n);
if (hasPos(n)) {
for (ix = 0; ix < Ndim; ix++) {
pos[i * Ndim + ix] = ND_pos(n)[ix];
}
}
}
return pos;
}
/* initLayout:
* Initialize node coordinates. If the node already has
* a position, use it.
* Return true if some node is fixed.
*/
int
initLayout(vtx_data * graph, int n, int dim, double **coords,
node_t ** nodes)
{
node_t *np;
double *xp;
double *yp;
double *pt;
int i, d;
int pinned = 0;
xp = coords[0];
yp = coords[1];
for (i = 0; i < n; i++) {
np = nodes[i];
if (hasPos(np)) {
pt = ND_pos(np);
*xp++ = *pt++;
*yp++ = *pt++;
if (dim > 2) {
for (d = 2; d < dim; d++)
coords[d][i] = *pt++;
}
if (isFixed(np))
pinned = 1;
} else {
*xp++ = drand48();
*yp++ = drand48();
if (dim > 2) {
for (d = 2; d < dim; d++)
coords[d][i] = drand48();
}
}
}
for (d = 0; d < dim; d++)
orthog1(n, coords[d]);
return pinned;
}
