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Fixed choice of fixed vertices for different types of lambda 

Not too sure about that change, but it (sort of) makes sense to only
fix one point when lambda !=0, it works, and looking -now- at the other
branch on ARAP, they had done the same.
This commit is contained in:
Mael Rouxel-Labbé 2016-10-21 18:13:38 +02:00
parent 95bc5f4b91
commit 8afe8af986
1 changed files with 16 additions and 36 deletions
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52
Surface_mesh_parameterization/include/CGAL/ARAP_parameterizer_3.h
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@ -233,43 +233,26 @@ private:
Error_code parameterize_border(const TriangleMesh& mesh,
const Vertex_set& vertices,
halfedge_descriptor bhd,
VertexUVmap uvmap,
VertexParameterizedMap vpmap)
{
// Compute (u,v) for (at least two) border vertices and mark them as "parameterized"
Error_code status = Base::OK;
CGAL_precondition(!vertices.empty());
#define FIXED_VERTICES_IN_PARAMETERIZATION_SPACE
#ifdef FIXED_VERTICES_IN_PARAMETERIZATION_SPACE
// Find the two farthest vertices in the initial parameterization
if(m_lambda != 0.){
// Fix a random vertex, the value in uvmap is already set
vertex_descriptor vd = *(vertices.begin());
put(vpmap, vd, true);
} else {
// This fixes two vertices that are far in the original geometry
// @fixme unefficient: brute force algorithm; use Convex hull + rotating caliphers instead
NT max_dist = (std::numeric_limits<NT>::min)();
vertex_descriptor vd1_max, vd2_max;
BOOST_FOREACH(vertex_descriptor vd1, vertices){
BOOST_FOREACH(vertex_descriptor vd2, vertices){
Point_2 uv1 = get(uvmap, vd1);
Point_2 uv2 = get(uvmap, vd2);
NT sq_d = CGAL::squared_distance(uv1, uv2);
if(sq_d > max_dist)
{
max_dist = sq_d;
vd1_max = vd1;
vd2_max = vd2;
}
}
// A local uvmap (that is then discarded) is passed to avoid changing
// the values of the real uvmap
CGAL::Unique_hash_map<vertex_descriptor, Point_2> useless_uvmap;
status = get_border_parameterizer().parameterize_border(mesh, bhd,
VertexUVMap(useless_uvmap),
vpmap);
}
// the value in uvmap is already set
put(vpmap, vd1_max, true);
put(vpmap, vd2_max, true);
#else
// This fixes two vertices that are far in the original geometry. We lose
// the UV information of the initial param
status = get_border_parameterizer().parameterize_border(mesh, bhd, uvmap, vpmap);
#endif
return status;
}
@ -1169,12 +1152,9 @@ public:
return status;
// Handle the boundary condition depending on lambda
if(true || m_lambda == 0)
{
status = parameterize_border(mesh, vertices, bhd, uvmap, vpmap);
if(status != Base::OK)
return status;
}
status = parameterize_border<VertexUVMap>(mesh, vertices, bhd, vpmap);
if(status != Base::OK)
return status;
// Compute all cotangent angles
Cot_hm cthm;