From 8bc430bb58153b71b3f07b82b59ae2ddfb154812 Mon Sep 17 00:00:00 2001
From: Jean-Francois Remacle <jean-francois.remacle@uclouvain.be>
Date: Sun, 11 Dec 2005 14:27:46 +0000
Subject: [PATCH] *** empty log message ***
---
Mesh/BDS.cpp | 120 +--
benchmarks/stl/demo1.stl | 2158 ++++++++++++++++++++++++++++++++++++++
2 files changed, 2201 insertions(+), 77 deletions(-)
create mode 100644 benchmarks/stl/demo1.stl
diff --git a/Mesh/BDS.cpp b/Mesh/BDS.cpp
index 7c6795d5d1..bfa28416a0 100644
--- a/Mesh/BDS.cpp
+++ b/Mesh/BDS.cpp
@@ -1,4 +1,4 @@
-// $Id: BDS.cpp,v 1.45 2005-12-08 15:35:20 remacle Exp $
+// $Id: BDS.cpp,v 1.46 2005-12-11 14:27:46 remacle Exp $
//
// Copyright (C) 1997-2005 C. Geuzaine, J.-F. Remacle
//
@@ -1936,7 +1936,7 @@ bool BDS_Mesh::split_edge(BDS_Edge * e, double coord, BDS_Mesh * geom)
triangles.push_back(t4);
if(geom || mid->g->surf)
- snap_point(mid, geom);
+ snap_point(mid, geom);
return true;
}
@@ -1990,7 +1990,7 @@ bool BDS_Mesh::swap_edge(BDS_Edge * e)
}
}
- // See if the swap revert one triangle
+ // See if the swap reverts one triangle
double cb1[3],cb2[3];
if(orientation == 1)
{
@@ -2117,6 +2117,9 @@ bool BDS_Mesh::collapse_edge(BDS_Edge * e, BDS_Point * p, const double eps)
p->Y = Y;
p->Z = Z;
n2 = t->N();
+
+ if(n1*n2 < 0) return false;
+
double s_before = surface_triangle(pts[0], pts[1], pts[2]);
// normals should not be opposed or change too dramatically
// this does not concern the triangles with the small edge that
@@ -2258,6 +2261,9 @@ bool BDS_Mesh::move_point(BDS_Point * p, double X, double Y, double Z)
p->X = oldx;
p->Y = oldy;
p->Z = oldz;
+
+ if (n1*n2 < 0) return false;
+
double angle = n1.angle(n2);
if(fabs(angle) > M_PI / 3)
return false;
@@ -2324,6 +2330,9 @@ bool BDS_Mesh::smooth_point(BDS_Point * p, BDS_Mesh * geom_mesh)
if(p->g && p->g->classif_degree <= 1)
return false;
+ // if(!p->g->surf)
+ // return false;
+
double X = 0;
double Y = 0;
@@ -2351,6 +2360,7 @@ bool BDS_Mesh::smooth_point(BDS_Point * p, BDS_Mesh * geom_mesh)
void BDS_Mesh::compute_metric_edge_lengths(const BDS_Metric & metric)
{
+
// printf("computation of metric lengths\n");
{
@@ -2362,6 +2372,14 @@ void BDS_Mesh::compute_metric_edge_lengths(const BDS_Metric & metric)
metric.target_length(0.5 * ((*it)->p2->X + (*it)->p1->X),
0.5 * ((*it)->p2->Y + (*it)->p1->Y),
0.5 * ((*it)->p2->Z + (*it)->p1->Z));
+ BDS_Edge *e = (*it);
+ BDS_GeomEntity *g = e->g;
+ if (g && g->classif_degree == 1)
+ {
+ double l = (*it)->length() * 4;
+ if (l < (*it)->target_length)
+ (*it)->target_length =l;
+ }
}
++it;
}
@@ -2374,7 +2392,10 @@ void BDS_Mesh::compute_metric_edge_lengths(const BDS_Metric & metric)
BDS_Edge *e = (*it);
BDS_GeomEntity *g = e->g;
- if(g && g->surf) {
+ // do not unrefined curves
+ // minimal length is the actual length
+
+ if(g && g->surf) {
double curvature = g->surf->normalCurv(0.5 * (e->p1->X + e->p2->X),
0.5 * (e->p1->Y + e->p2->Y),
0.5 * (e->p1->Z + e->p2->Z));
@@ -2392,7 +2413,6 @@ void BDS_Mesh::compute_metric_edge_lengths(const BDS_Metric & metric)
3.14159 * radius / metric.nb_elements_per_radius_of_curvature;
e->target_length =
metric.update_target_length(target, e->target_length);
-
}
++it;
}
@@ -2454,14 +2474,10 @@ int BDS_Mesh::adapt_mesh(const BDS_Metric & metric, bool smooth,
SNAP_SUCCESS = 0;
SNAP_FAILURE = 0;
- // printf("METRIC %g %g %g\n",LC,metric._min,metric._max);
-
- // add initial set of edges in a list
-
std::list < BDS_Edge * >small_to_long(edges);
// split edges
- {
+ for(int ii=0;ii<2;ii++){
std::list < BDS_Edge * >::iterator it = small_to_long.begin();
std::list < BDS_Edge * >::iterator ite = small_to_long.end();
compute_metric_edge_lengths(metric);
@@ -2471,45 +2487,17 @@ int BDS_Mesh::adapt_mesh(const BDS_Metric & metric, bool smooth,
double length = (*it)->length();
if(!(*it)->deleted && length > (*it)->target_length / 0.7) {
split_edge(*it, 0.5, geom_mesh);
- //split_edge (*it, 0.5, 0 );
nb_modif++;
}
}
++it;
}
+ cleanup();
+ small_to_long = edges;
}
-
- // re-create small_to_long
- cleanup();
- small_to_long = edges;
-
- // split edges
- {
- std::list<BDS_Edge*>::iterator it = small_to_long.begin();
- std::list<BDS_Edge*>::iterator ite = small_to_long.end();
- compute_metric_edge_lengths (metric);
-
- while (it != ite)
- {
- if ((*it)->numfaces()==2)
- {
- double length = (*it)->length();
- if (!(*it)->deleted && length > (*it)->target_length / 0.7 ){
- split_edge (*it, 0.5,geom_mesh );
- //split_edge (*it, 0.5, 0 );
- nb_modif++;
- }
- }
- ++it;
- }
- }
-
- // re-create small_to_long
- cleanup();
- small_to_long = edges;
// collapse
- {
+ for(int ii=0;ii<1;ii++){
std::list<BDS_Edge*>::iterator it = small_to_long.begin();
std::list<BDS_Edge*>::iterator ite = small_to_long.end();
// compute_metric_edge_lengths (metric);
@@ -2531,9 +2519,9 @@ int BDS_Mesh::adapt_mesh(const BDS_Metric & metric, bool smooth,
}
++it;
}
+ cleanup();
+ small_to_long = edges;
}
- cleanup();
- small_to_long = edges;
{
std::list<BDS_Edge*>::iterator it = small_to_long.begin();
@@ -2545,46 +2533,24 @@ int BDS_Mesh::adapt_mesh(const BDS_Metric & metric, bool smooth,
BDS_Point *op[2];
(*it)->oppositeof (op);
- double a1 = surface_triangle ( (*it)->p1 , (*it)->p2 , op[0] );
- double a2 = surface_triangle ( (*it)->p1 , (*it)->p2 , op[1] );
- double b1 = surface_triangle ( (*it)->p1 , op[0] , op[1] );
- double b2 = surface_triangle ( (*it)->p2 , op[0] , op[1] );
-
- double cb1[3],cb2[3];
- normal_triangle ( (*it)->p1 , op[0] , op[1],cb1 );
- normal_triangle ( (*it)->p2 , op[0] , op[1],cb2 );
-
- double prosc = cb1[0]*cb2[0]+cb1[1]*cb2[1]+cb1[2]*cb2[2];
-
- if (fabs(a1+a2-b1-b2) < 0.2 * (a1+a2+b1+b2))
+ double qa1 = quality_triangle ( (*it)->p1 , (*it)->p2 , op[0] );
+ double qa2 = quality_triangle ( (*it)->p1 , (*it)->p2 , op[1] );
+ double qb1 = quality_triangle ( (*it)->p1 , op[0] , op[1] );
+ double qb2 = quality_triangle ( (*it)->p2 , op[0] , op[1] );
+ double qa = (qa1<qa2)?qa1:qa2;
+ double qb = (qb1<qb2)?qb1:qb2;
+ if (qb > qa)
{
- double qa1 = quality_triangle ( (*it)->p1 , (*it)->p2 , op[0] );
- double qa2 = quality_triangle ( (*it)->p1 , (*it)->p2 , op[1] );
- double qb1 = quality_triangle ( (*it)->p1 , op[0] , op[1] );
- double qb2 = quality_triangle ( (*it)->p2 , op[0] , op[1] );
-
- double d = dist_droites_gauches((*it)->p1, (*it)->p2,
- op[0],op[1]);
- BDS_Vector v1 (*((*it)->p1), *((*it)->p2));
- BDS_Vector v2 (*(op[0]),*(op[1]));
-
- double dd = sqrt (v1*v1 + v2*v2);
-
- double qa = (qa1<qa2)?qa1:qa2;
- double qb = (qb1<qb2)?qb1:qb2;
- // printf("qa %g qb %g ..\n",qa,qb);
- if (qb > qa && d < 0.1 * dd)
- {
- nb_modif++;
- swap_edge ( *it );
- }
+ nb_modif++;
+ swap_edge ( *it );
}
- }
+ }
++it;
}
}
+
cleanup();
- if (smooth && 0){
+ if (smooth ){
Msg(INFO,"smoothing %d points\n",points.size());
std::set<BDS_Point*, PointLessThan>::iterator it = points.begin();
std::set<BDS_Point*, PointLessThan>::iterator ite = points.end();
diff --git a/benchmarks/stl/demo1.stl b/benchmarks/stl/demo1.stl
new file mode 100644
index 0000000000..04ddf08d8d
--- /dev/null
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+ outer loop
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+ vertex -3.3333e-08 -4e-08 -3.6667e-08
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+ vertex 3.3333e-08 -4e-08 -3.6667e-08
+ endloop
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+ vertex 4e-08 -4e-08 3.333e-09
+ endloop
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+ outer loop
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+ outer loop
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+ endloop
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+ vertex 4e-08 -4e-08 -5e-08
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+ endloop
+endfacet
+endsolid Created by Gmsh
--
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