bool
OVERSKETCH::find_matching_sil(CGESTUREptr& g)
{
err_adv(debug, "OVERSKETCH::find_matching_sil");
const size_t MIN_GEST_PTS = 10;
if (!(g && g->pts().size() >= MIN_GEST_PTS))
return false;
if (BMESH::_freeze_sils)
return false;
VisRefImage *vis_ref = VisRefImage::lookup(VIEW::peek());
if (!vis_ref)
return false;
// 1. see if the gesture runs along a silhouette
// of a single mesh.
SilEdgeFilter sil_filter;
const PIXEL_list& pts = g->pts();
BMESHptr mesh = nullptr;
for (PIXEL_list::size_type i=0; i<pts.size(); i++) {
Bedge* e = (Bedge*)
vis_ref->find_near_simplex(pts[i], SIL_SEARCH_RAD, sil_filter);
if (!(e && e->mesh())) {
err_adv(debug, " gesture too far from silhouette");
return false;
}
if (mesh && mesh != e->mesh()) {
err_adv(debug, " found a second mesh, rejecting");
return false;
}
mesh = e->mesh();
}
if (!dynamic_pointer_cast<LMESH>(mesh)) {
err_adv(debug, " found non-LMESH, rejecting");
return false;
}
err_adv(debug, " gesture aligns with silhouette");
err_adv(debug, " mesh level %d", mesh->subdiv_level());
// 2. extract the portion of the silhouette that matches
// the gesture, store in _selected_sils
return find_matching_sil(pts, mesh->sil_strip());
}
inline double
compute_yardstick(CBedge_list& edges, bool debug=false)
{
double ret = 0.6 * edges.strong_edges().avg_len();
BMESHptr mk = edges.mesh();
BMESHptr m0 = get_top_level(edges.get_faces()).mesh();
int lk = 0; // mesh level of edges
int l0 = 0; // mesh level of edges' control region
double s = 1; // scaling factor
if (mk && m0) {
lk = mk->subdiv_level();
l0 = m0->subdiv_level();
s = (1 << (lk - l0));
}
err_adv(debug, "lk: %d, l0: %d, scaling: %f", lk, l0, s);
return s * ret;
}