double a1= vertex_areas[v1];
single_source_shortest_paths(v1, edge_weights, vertex_distances);
FOR_VERTEX(v2) {
+ if (v1 == v2) continue;
double a2= vertex_areas[v2];
double d2= hypotD2plus(v[v1],v[v2], d2_epsilon);
double s= vertex_distances[v2];
- double sd= s / d2;
- double sd2= sd*sd;
+ double s2= s*s + d2_epsilon;
+ double sd2= s2 / d2;
double cost_contrib= a1*a2 * (sd2 - 1) / (d2*d2);
- //printf("layout %03x..%03x (a=%g,%g) s=%g d2=%g cost+=%g\n",
- // v1,v2, a1,a2, s,d2, cost_contrib);
+ if (cost_contrib < -1e-4) {
+ printf("layout %03x..%03x (a=%g,%g) s=%g s2=%g d2=%g sd2=%g"
+ " cost+=%g\n", v1,v2, a1,a2, s,s2,d2,sd2, cost_contrib);
+ abort();
+ }
total_cost += cost_contrib;
}
}