static void bb_tree_free (GNode * tree, gboolean free_leaves)
{
GNode * i;
g_return_if_fail (tree != NULL);
if (!free_leaves && tree->children == NULL) /* leaf node */
return;
gts_object_destroy (tree->data);
i = tree->children;
while (i) {
bb_tree_free (i, free_leaves);
i = i->next;
}
}
static PyObject *
new_(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyObject *o;
PygtsObject *obj;
guint alloc_gtsobj = TRUE;
/* Parse the args */
if(kwds) {
o = PyDict_GetItemString(kwds,"alloc_gtsobj");
if(o==Py_False) {
alloc_gtsobj = FALSE;
}
if(o!=NULL) {
PyDict_DelItemString(kwds, "alloc_gtsobj");
}
}
if(kwds) {
Py_INCREF(Py_False);
PyDict_SetItemString(kwds,"alloc_gtsobj", Py_False);
}
/* Chain up */
obj = PYGTS_OBJECT(PygtsPointType.tp_new(type,args,kwds));
/* Allocate the gtsobj (if needed) */
if( alloc_gtsobj ) {
obj->gtsobj = GTS_OBJECT(gts_vertex_new(gts_vertex_class(),0,0,0));
if( obj->gtsobj == NULL ) {
PyErr_SetString(PyExc_MemoryError, "could not create Vertex");
return NULL;
}
/* Create the parent GtsSegment */
if( (obj->gtsobj_parent=parent(GTS_VERTEX(obj->gtsobj))) == NULL ) {
gts_object_destroy(obj->gtsobj);
obj->gtsobj = NULL;
return NULL;
}
pygts_object_register(obj);
}
return (PyObject*)obj;
}
static gboolean gfs_init_stokes_wave_event (GfsEvent * event, GfsSimulation * sim)
{
if ((* GFS_EVENT_CLASS (GTS_OBJECT_CLASS (gfs_init_stokes_wave_class ())->parent_class)->event)
(event, sim)) {
GfsVariable ** velocity = gfs_domain_velocity (GFS_DOMAIN (sim));
GfsVariable * t = gfs_variable_from_name (GFS_DOMAIN (sim)->variables, "T");
g_assert (velocity);
g_assert (t);
gfs_domain_cell_traverse (GFS_DOMAIN (sim), FTT_PRE_ORDER, FTT_TRAVERSE_LEAFS, -1,
(FttCellTraverseFunc) init_velocity, velocity);
GfsSurface * surface = GFS_SURFACE (gts_object_new (GTS_OBJECT_CLASS (gfs_surface_class ())));
surface->f = gfs_function_spatial_new (gfs_function_spatial_class (), stokes_height);
gfs_object_simulation_set (surface->f, sim);
gfs_domain_init_fraction (GFS_DOMAIN (sim), GFS_GENERIC_SURFACE (surface), t);
gts_object_destroy (GTS_OBJECT (surface));
return TRUE;
}
return FALSE;
}
static void cartesian_grid_destroy (CartesianGrid * g,
gboolean destroy_vertices)
{
g_return_if_fail (g != NULL);
if (destroy_vertices) {
guint i, j;
gts_allow_floating_vertices = TRUE;
for (i = 0; i < g->nx; i++)
for (j = 0; j < g->ny; j++)
if (g->vertices[i][j])
gts_object_destroy (GTS_OBJECT (g->vertices[i][j]));
gts_allow_floating_vertices = FALSE;
}
free2D ((void **) g->vertices, g->nx);
g_free (g);
}
/**
* gts_bb_tree_segment_distance:
* @tree: a bounding box tree.
* @s: a #GtsSegment.
* @distance: a #GtsBBoxDistFunc.
* @delta: spatial scale of the sampling to be used.
* @range: a #GtsRange to be filled with the results.
*
* Given a segment @s, points are sampled regularly on its length
* using @delta as increment. The distance from each of these points
* to the closest object of @tree is computed using @distance and the
* gts_bb_tree_point_distance() function. The fields of @range are
* filled with the number of points sampled, the minimum, average and
* maximum value and the standard deviation.
*/
void gts_bb_tree_segment_distance (GNode * tree,
GtsSegment * s,
gdouble (*distance) (GtsPoint *,
gpointer),
gdouble delta,
GtsRange * range)
{
GtsPoint * p1, * p2, * p;
GtsVector p1p2;
gdouble l, t, dt;
guint i, n;
g_return_if_fail (tree != NULL);
g_return_if_fail (s != NULL);
g_return_if_fail (distance != NULL);
g_return_if_fail (delta > 0.);
g_return_if_fail (range != NULL);
p1 = GTS_POINT (s->v1);
p2 = GTS_POINT (s->v2);
gts_vector_init (p1p2, p1, p2);
gts_range_init (range);
p = GTS_POINT (gts_object_new (GTS_OBJECT_CLASS (gts_point_class())));
l = sqrt (gts_vector_scalar (p1p2, p1p2));
n = (guint) (l/delta + 1);
dt = 1.0/(gdouble) n;
t = 0.0;
for (i = 0; i <= n; i++, t += dt) {
p->x = p1->x + t*p1p2[0];
p->y = p1->y + t*p1p2[1];
p->z = p1->z + t*p1p2[2];
gts_range_add_value (range,
gts_bb_tree_point_distance (tree, p, distance, NULL));
}
gts_object_destroy (GTS_OBJECT (p));
gts_range_update (range);
}
static void edge_swap (GtsEdge * e, GtsSurface * s, GtsEHeap * heap)
{
GSList * i;
GtsTriangle * t1 = NULL, * t2 = NULL;
GtsVertex * v1, * v2, * v3, * v4;
GtsEdge * e1, * e2, * e3, * e4;
i = e->triangles;
while (i) {
if (GTS_IS_FACE (i->data)) {
if (!t1) t1 = i->data;
else if (!t2) t2 = i->data;
else g_assert_not_reached ();
}
i = i->next;
}
g_assert (t1 && t2);
gts_triangle_vertices_edges (t1, e, &v1, &v2, &v3, &e, &e3, &e4);
gts_triangle_vertices_edges (t2, e, &v2, &v1, &v4, &e, &e1, &e2);
gts_object_destroy (GTS_OBJECT (e));
e = gts_edge_new (s->edge_class, v3, v4);
gts_surface_add_face (s, gts_face_new (s->face_class, e, e4, e1));
gts_surface_add_face (s, gts_face_new (s->face_class, e, e2, e3));
HEAP_INSERT_EDGE (heap, e);
HEAP_REMOVE_EDGE (heap, e1);
HEAP_INSERT_EDGE (heap, e1);
HEAP_REMOVE_EDGE (heap, e2);
HEAP_INSERT_EDGE (heap, e2);
HEAP_REMOVE_EDGE (heap, e3);
HEAP_INSERT_EDGE (heap, e3);
HEAP_REMOVE_EDGE (heap, e4);
HEAP_INSERT_EDGE (heap, e4);
}
static void recursive_bisection (GtsWGraph * wg,
guint np,
guint ntry,
guint mmax,
guint nmin,
gfloat imbalance,
GSList ** list)
{
if (np == 0)
*list = g_slist_prepend (*list, wg);
else {
GtsGraphBisection * bg =
gts_graph_bisection_new (wg, ntry, mmax, nmin, imbalance);
GtsGraph * g1 = bg->g1;
GtsGraph * g2 = bg->g2;
gts_object_destroy (GTS_OBJECT (wg));
gts_graph_bisection_destroy (bg, FALSE);
recursive_bisection (GTS_WGRAPH (g1), np - 1, ntry, mmax, nmin, imbalance,
list);
recursive_bisection (GTS_WGRAPH (g2), np - 1, ntry, mmax, nmin, imbalance,
list);
}
}
/**
* gts_edges_merge:
* @edges: a list of #GtsEdge.
*
* For each edge in @edges check if it is duplicated (as
* returned by gts_edge_is_duplicate()). If it is replace it by its
* duplicate, destroy it and remove it from the list.
*
* Returns: the updated @edges list.
*/
GList * gts_edges_merge (GList * edges)
{
GList * i = edges;
/* we want to control edge destruction */
gts_allow_floating_edges = TRUE;
while (i) {
GtsEdge * e = i->data;
GtsEdge * de = gts_edge_is_duplicate (e);
if (de) {
GList * next = i->next;
edges = g_list_remove_link (edges, i);
g_list_free_1 (i);
i = next;
gts_edge_replace (e, de);
gts_object_destroy (GTS_OBJECT (e));
}
else
i = i->next;
}
gts_allow_floating_edges = FALSE;;
return edges;
}
static GtsObject *
parent(GtsVertex *v1) {
GtsPoint *p1;
GtsVertex *v2;
GtsSegment *p;
/* Create another Vertex */
p1 = GTS_POINT(v1);
if( (v2 = gts_vertex_new(pygts_parent_vertex_class(),p1->x,p1->y,p1->z+1))
== NULL ) {
PyErr_SetString(PyExc_MemoryError, "could not create parent");
return NULL;
}
/* Create and return the parent */
if( (p = gts_segment_new(pygts_parent_segment_class(),v1,v2))
== NULL ) {
PyErr_SetString(PyExc_MemoryError, "could not create parent");
gts_object_destroy(GTS_OBJECT(v2));
return NULL;
}
return GTS_OBJECT(p);
}
/**
* gts_graph_bisection_new:
* @wg: a #GtsWGraph.
* @ntry: the number of tries for the graph growing algorithm.
* @mmax: the number of unsucessful moves for the refinement algorithm.
* @nmin: the minimum number of nodes of the coarsest graph.
* @imbalance: the maximum relative imbalance allowed between the
* weights of both halves of the partition.
*
* An implementation of a multilevel bisection algorithm as presented
* in Karypis and Kumar (1997). A multilevel hierarchy of graphs is
* created using the #GtsPGraph object. The bisection of the coarsest
* graph is created using the gts_graph_ggg_bisection() function. The
* graph is then uncoarsened using gts_pgraph_down() and at each level
* the bisection is refined using gts_graph_bisection_bkl_refine().
*
* Returns: a new #GtsGraphBisection of @wg.
*/
GtsGraphBisection * gts_graph_bisection_new (GtsWGraph * wg,
guint ntry,
guint mmax,
guint nmin,
gfloat imbalance)
{
GtsGraph * g;
GtsPGraph * pg;
GtsGraphBisection * bg;
gdouble cost;
g_return_val_if_fail (wg != NULL, NULL);
g = GTS_GRAPH (wg);
pg = gts_pgraph_new (gts_pgraph_class (), g,
gts_gnode_split_class (),
gts_wgnode_class (),
gts_wgedge_class (),
nmin);
bg = gts_graph_ggg_bisection (g, ntry);
#ifdef DEBUG
fprintf (stderr, "before size: %5d weight: %5g cuts: %5d cweight: %5g\n",
gts_container_size (GTS_CONTAINER (bg->g1)),
gts_graph_weight (bg->g1),
gts_graph_edges_cut (bg->g1),
gts_graph_edges_cut_weight (bg->g1));
g_assert (gts_graph_bisection_check (bg));
#endif
while ((cost = gts_graph_bisection_bkl_refine (bg, mmax, imbalance))) {
#ifdef DEBUG
fprintf (stderr, " cost: %g\n", cost);
g_assert (gts_graph_bisection_check (bg));
#endif
}
#ifdef DEBUG
fprintf (stderr, "after size: %5d weight: %5g cuts: %5d cweight: %5g\n",
gts_container_size (GTS_CONTAINER (bg->g1)),
gts_graph_weight (bg->g1),
gts_graph_edges_cut (bg->g1),
gts_graph_edges_cut_weight (bg->g1));
#endif
while (gts_pgraph_down (pg, (GtsFunc) bisection_children, bg)) {
#ifdef DEBUG
fprintf (stderr, "before size: %5d weight: %5g cuts: %5d cweight: %5g\n",
gts_container_size (GTS_CONTAINER (bg->g1)),
gts_graph_weight (bg->g1),
gts_graph_edges_cut (bg->g1),
gts_graph_edges_cut_weight (bg->g1));
#endif
while ((cost = gts_graph_bisection_bkl_refine (bg, mmax, imbalance))) {
#ifdef DEBUG
fprintf (stderr, " cost: %g\n", cost);
g_assert (gts_graph_bisection_check (bg));
#endif
}
#ifdef DEBUG
fprintf (stderr, "after size: %5d weight: %5g cuts: %5d cweight: %5g\n",
gts_container_size (GTS_CONTAINER (bg->g1)),
gts_graph_weight (bg->g1),
gts_graph_edges_cut (bg->g1),
gts_graph_edges_cut_weight (bg->g1));
#endif
}
gts_object_destroy (GTS_OBJECT (pg));
return bg;
}
static PyObject *
new_(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyObject *o;
PygtsObject *obj;
GtsSegment *tmp;
GtsObject *segment=NULL;
PyObject *v1_=NULL,*v2_=NULL;
PygtsVertex *v1,*v2;
guint alloc_gtsobj = TRUE;
guint N;
/* Parse the args */
if(kwds) {
o = PyDict_GetItemString(kwds,"alloc_gtsobj");
if(o==Py_False) {
alloc_gtsobj = FALSE;
}
if(o!=NULL) {
PyDict_DelItemString(kwds, "alloc_gtsobj");
}
}
if(kwds) {
Py_INCREF(Py_False);
PyDict_SetItemString(kwds,"alloc_gtsobj", Py_False);
}
/* Allocate the gtsobj (if needed) */
if( alloc_gtsobj ) {
/* Parse the args */
if( (N = PyTuple_Size(args)) < 2 ) {
PyErr_SetString(PyExc_TypeError,"expected two Vertices");
return NULL;
}
v1_ = PyTuple_GET_ITEM(args,0);
v2_ = PyTuple_GET_ITEM(args,1);
/* Convert to PygtsObjects */
if(!pygts_vertex_check(v1_)) {
PyErr_SetString(PyExc_TypeError,"expected two Vertices");
return NULL;
}
if(!pygts_vertex_check(v2_)) {
PyErr_SetString(PyExc_TypeError,"expected two Vertices");
return NULL;
}
v1 = PYGTS_VERTEX(v1_);
v2 = PYGTS_VERTEX(v2_);
/* Error check */
if(PYGTS_OBJECT(v1)->gtsobj == PYGTS_OBJECT(v2)->gtsobj) {
PyErr_SetString(PyExc_ValueError,"Vertices are identical");
return NULL;
}
/* Create the GtsSegment */
segment = GTS_OBJECT(gts_segment_new(gts_segment_class(),
GTS_VERTEX(v1->gtsobj),
GTS_VERTEX(v2->gtsobj)));
if( segment == NULL ) {
PyErr_SetString(PyExc_MemoryError, "could not create Segment");
return NULL;
}
/* Check for duplicate */
tmp = gts_segment_is_duplicate(GTS_SEGMENT(segment));
if( tmp != NULL ) {
gts_object_destroy(segment);
segment = GTS_OBJECT(tmp);
}
/* If corresponding PyObject found in object table, we are done */
if( (obj=(PygtsObject*)g_hash_table_lookup(obj_table,segment)) != NULL ) {
Py_INCREF(obj);
return (PyObject*)obj;
}
}
/* Chain up */
obj = PYGTS_OBJECT(PygtsObjectType.tp_new(type,args,kwds));
if( alloc_gtsobj ) {
obj->gtsobj = segment;
pygts_object_register(PYGTS_OBJECT(obj));
}
return (PyObject*)obj;
}
/* set - compute set operations between surfaces */
int main (int argc, char * argv[])
{
GtsSurface * s1, * s2, * s3;
GtsSurfaceInter * si;
GNode * tree1, * tree2;
FILE * fptr;
GtsFile * fp;
int c = 0;
gboolean verbose = TRUE;
gboolean inter = FALSE;
gboolean check_self_intersection = FALSE;
gchar * operation, * file1, * file2;
gboolean closed = TRUE, is_open1, is_open2;
if (!setlocale (LC_ALL, "POSIX"))
g_warning ("cannot set locale to POSIX");
/* parse options using getopt */
while (c != EOF) {
#ifdef HAVE_GETOPT_LONG
static struct option long_options[] = {
{"inter", no_argument, NULL, 'i'},
{"self", no_argument, NULL, 's'},
{"help", no_argument, NULL, 'h'},
{"verbose", no_argument, NULL, 'v'}
};
int option_index = 0;
switch ((c = getopt_long (argc, argv, "hvis",
long_options, &option_index))) {
#else /* not HAVE_GETOPT_LONG */
switch ((c = getopt (argc, argv, "hvis"))) {
#endif /* not HAVE_GETOPT_LONG */
case 's': /* self */
check_self_intersection = TRUE;
break;
case 'i': /* inter */
inter = TRUE;
break;
case 'v': /* verbose */
verbose = FALSE;
break;
case 'h': /* help */
fprintf (stderr,
"Usage: set [OPTION] OPERATION FILE1 FILE2\n"
"Compute set operations between surfaces, where OPERATION is either.\n"
"union, inter, diff.\n"
"\n"
" -i --inter output an OOGL (Geomview) representation of the curve\n"
" intersection of the surfaces\n"
" -s --self checks that the surfaces are not self-intersecting\n"
" if one of them is, the set of self-intersecting faces\n"
" is written (as a GtsSurface) on standard output\n"
" -v --verbose do not print statistics about the surface\n"
" -h --help display this help and exit\n"
"\n"
"Reports bugs to %s\n",
GTS_MAINTAINER);
return 0; /* success */
break;
case '?': /* wrong options */
fprintf (stderr, "Try `set --help' for more information.\n");
return 1; /* failure */
}
}
if (optind >= argc) { /* missing OPERATION */
fprintf (stderr,
"set: missing OPERATION\n"
"Try `set --help' for more information.\n");
return 1; /* failure */
}
operation = argv[optind++];
if (optind >= argc) { /* missing FILE1 */
fprintf (stderr,
"set: missing FILE1\n"
"Try `set --help' for more information.\n");
return 1; /* failure */
}
file1 = argv[optind++];
if (optind >= argc) { /* missing FILE2 */
fprintf (stderr,
"set: missing FILE2\n"
"Try `set --help' for more information.\n");
return 1; /* failure */
}
file2 = argv[optind++];
/* open first file */
if ((fptr = fopen (file1, "rt")) == NULL) {
fprintf (stderr, "set: can not open file `%s'\n", file1);
return 1;
}
/* reads in first surface file */
s1 = GTS_SURFACE (gts_object_new (GTS_OBJECT_CLASS (gts_surface_class ())));
fp = gts_file_new (fptr);
if (gts_surface_read (s1, fp)) {
fprintf (stderr, "set: `%s' is not a valid GTS surface file\n",
file1);
fprintf (stderr, "%s:%d:%d: %s\n", file1, fp->line, fp->pos, fp->error);
return 1;
}
gts_file_destroy (fp);
fclose (fptr);
/* open second file */
if ((fptr = fopen (file2, "rt")) == NULL) {
fprintf (stderr, "set: can not open file `%s'\n", file2);
return 1;
}
/* reads in second surface file */
s2 = GTS_SURFACE (gts_object_new (GTS_OBJECT_CLASS (gts_surface_class ())));
fp = gts_file_new (fptr);
if (gts_surface_read (s2, fp)) {
fprintf (stderr, "set: `%s' is not a valid GTS surface file\n",
file2);
fprintf (stderr, "%s:%d:%d: %s\n", file2, fp->line, fp->pos, fp->error);
return 1;
}
gts_file_destroy (fp);
fclose (fptr);
/* display summary information about both surfaces */
if (verbose) {
gts_surface_print_stats (s1, stderr);
gts_surface_print_stats (s2, stderr);
}
/* check that the surfaces are orientable manifolds */
if (!gts_surface_is_orientable (s1)) {
fprintf (stderr, "set: surface `%s' is not an orientable manifold\n",
file1);
return 1;
}
if (!gts_surface_is_orientable (s2)) {
fprintf (stderr, "set: surface `%s' is not an orientable manifold\n",
file2);
return 1;
}
/* check that the surfaces are not self-intersecting */
if (check_self_intersection) {
GtsSurface * self_intersects;
self_intersects = gts_surface_is_self_intersecting (s1);
if (self_intersects != NULL) {
fprintf (stderr, "set: surface `%s' is self-intersecting\n", file1);
if (verbose)
gts_surface_print_stats (self_intersects, stderr);
gts_surface_write (self_intersects, stdout);
gts_object_destroy (GTS_OBJECT (self_intersects));
return 1;
}
self_intersects = gts_surface_is_self_intersecting (s2);
if (self_intersects != NULL) {
fprintf (stderr, "set: surface `%s' is self-intersecting\n", file2);
if (verbose)
gts_surface_print_stats (self_intersects, stderr);
gts_surface_write (self_intersects, stdout);
gts_object_destroy (GTS_OBJECT (self_intersects));
return 1;
}
}
/* build bounding box tree for first surface */
tree1 = gts_bb_tree_surface (s1);
is_open1 = gts_surface_volume (s1) < 0. ? TRUE : FALSE;
/* build bounding box tree for second surface */
tree2 = gts_bb_tree_surface (s2);
is_open2 = gts_surface_volume (s2) < 0. ? TRUE : FALSE;
si = gts_surface_inter_new (gts_surface_inter_class (),
s1, s2, tree1, tree2, is_open1, is_open2);
g_assert (gts_surface_inter_check (si, &closed));
if (!closed) {
fprintf (stderr,
"set: the intersection of `%s' and `%s' is not a closed curve\n",
file1, file2);
return 1;
}
s3 = gts_surface_new (gts_surface_class (),
gts_face_class (),
gts_edge_class (),
gts_vertex_class ());
if (!strcmp (operation, "union")) {
gts_surface_inter_boolean (si, s3, GTS_1_OUT_2);
gts_surface_inter_boolean (si, s3, GTS_2_OUT_1);
}
else if (!strcmp (operation, "inter")) {
gts_surface_inter_boolean (si, s3, GTS_1_IN_2);
gts_surface_inter_boolean (si, s3, GTS_2_IN_1);
}
else if (!strcmp (operation, "diff")) {
gts_surface_inter_boolean (si, s3, GTS_1_OUT_2);
gts_surface_inter_boolean (si, s3, GTS_2_IN_1);
gts_surface_foreach_face (si->s2, (GtsFunc) gts_triangle_revert, NULL);
gts_surface_foreach_face (s2, (GtsFunc) gts_triangle_revert, NULL);
}
else {
fprintf (stderr,
"set: operation `%s' unknown\n"
"Try `set --help' for more information.\n",
operation);
return 1;
}
/* check that the resulting surface is not self-intersecting */
if (check_self_intersection) {
GtsSurface * self_intersects;
self_intersects = gts_surface_is_self_intersecting (s3);
if (self_intersects != NULL) {
fprintf (stderr, "set: the resulting surface is self-intersecting\n");
if (verbose)
gts_surface_print_stats (self_intersects, stderr);
gts_surface_write (self_intersects, stdout);
gts_object_destroy (GTS_OBJECT (self_intersects));
return 1;
}
}
/* display summary information about the resulting surface */
if (verbose)
gts_surface_print_stats (s3, stderr);
/* write resulting surface to standard output */
if (inter) {
printf ("LIST {\n");
g_slist_foreach (si->edges, (GFunc) write_edge, stdout);
printf ("}\n");
}
else {
GTS_POINT_CLASS (gts_vertex_class ())->binary = TRUE;
gts_surface_write (s3, stdout);
}
/* destroy surfaces */
gts_object_destroy (GTS_OBJECT (s1));
gts_object_destroy (GTS_OBJECT (s2));
gts_object_destroy (GTS_OBJECT (s3));
gts_object_destroy (GTS_OBJECT (si));
/* destroy bounding box trees (including bounding boxes) */
gts_bb_tree_destroy (tree1, TRUE);
gts_bb_tree_destroy (tree2, TRUE);
return 0;
}
int spheroidsToSTL(const string& out, const shared_ptr<DemField>& dem, Real tol, const string& solid, int mask, bool append, bool clipCell, bool merge){
if(tol==0 || isnan(tol)) throw std::runtime_error("tol must be non-zero.");
#ifndef WOO_GTS
if(merge) throw std::runtime_error("woo.triangulated.spheroidsToSTL: merge=True only possible in builds with the 'gts' feature.");
#endif
// first traversal to find reference radius
auto particleOk=[&](const shared_ptr<Particle>&p){ return (mask==0 || (p->mask & mask)) && (p->shape->isA<Sphere>() || p->shape->isA<Ellipsoid>() || p->shape->isA<Capsule>()); };
int numTri=0;
if(tol<0){
LOG_DEBUG("tolerance is negative, taken as relative to minimum radius.");
Real minRad=Inf;
for(const auto& p: *dem->particles){
if(particleOk(p)) minRad=min(minRad,p->shape->equivRadius());
}
if(isinf(minRad) || isnan(minRad)) throw std::runtime_error("Minimum radius not found (relative tolerance specified); no matching particles?");
tol=-minRad*tol;
LOG_DEBUG("Minimum radius "<<minRad<<".");
}
LOG_DEBUG("Triangulation tolerance is "<<tol);
std::ofstream stl(out,append?(std::ofstream::app|std::ofstream::binary):std::ofstream::binary); // binary better, anyway
if(!stl.good()) throw std::runtime_error("Failed to open output file "+out+" for writing.");
Scene* scene=dem->scene;
if(!scene) throw std::logic_error("DEM field has not associated scene?");
// periodicity, cache that for later use
AlignedBox3r cell;
/*
wasteful memory-wise, but we need to store the whole triangulation in case *merge* is in effect,
when it is only an intermediary result and will not be output as-is
*/
vector<vector<Vector3r>> ppts;
vector<vector<Vector3i>> ttri;
vector<Particle::id_t> iid;
for(const auto& p: *dem->particles){
if(!particleOk(p)) continue;
const auto sphere=dynamic_cast<Sphere*>(p->shape.get());
const auto ellipsoid=dynamic_cast<Ellipsoid*>(p->shape.get());
const auto capsule=dynamic_cast<Capsule*>(p->shape.get());
vector<Vector3r> pts;
vector<Vector3i> tri;
if(sphere || ellipsoid){
Real r=sphere?sphere->radius:ellipsoid->semiAxes.minCoeff();
// 1 is for icosahedron
int tess=ceil(M_PI/(5*acos(1-tol/r)));
LOG_DEBUG("Tesselation level for #"<<p->id<<": "<<tess);
tess=max(tess,0);
auto uSphTri(CompUtils::unitSphereTri20(/*0 for icosahedron*/max(tess-1,0)));
const auto& uPts=std::get<0>(uSphTri); // unit sphere point coords
pts.resize(uPts.size());
const auto& node=(p->shape->nodes[0]);
Vector3r scale=(sphere?sphere->radius*Vector3r::Ones():ellipsoid->semiAxes);
for(size_t i=0; i<uPts.size(); i++){
pts[i]=node->loc2glob(uPts[i].cwiseProduct(scale));
}
tri=std::get<1>(uSphTri); // this makes a copy, but we need out own for capsules
}
if(capsule){
#ifdef WOO_VTK
int subdiv=max(4.,ceil(M_PI/(acos(1-tol/capsule->radius))));
std::tie(pts,tri)=VtkExport::triangulateCapsule(static_pointer_cast<Capsule>(p->shape),subdiv);
#else
throw std::runtime_error("Triangulation of capsules is (for internal and entirely fixable reasons) only available when compiled with the 'vtk' features.");
#endif
}
// do not write out directly, store first for later
ppts.push_back(pts);
ttri.push_back(tri);
LOG_TRACE("#"<<p->id<<" triangulated: "<<tri.size()<<","<<pts.size()<<" faces,vertices.");
if(scene->isPeriodic){
// make sure we have aabb, in skewed coords and such
if(!p->shape->bound){
// this is a bit ugly, but should do the trick; otherwise we would recompute all that ourselves here
if(sphere) Bo1_Sphere_Aabb().go(p->shape);
else if(ellipsoid) Bo1_Ellipsoid_Aabb().go(p->shape);
else if(capsule) Bo1_Capsule_Aabb().go(p->shape);
}
assert(p->shape->bound);
const AlignedBox3r& box(p->shape->bound->box);
AlignedBox3r cell(Vector3r::Zero(),scene->cell->getSize()); // possibly in skewed coords
// central offset
Vector3i off0;
scene->cell->canonicalizePt(p->shape->nodes[0]->pos,off0); // computes off0
Vector3i off; // offset from the original cell
//cerr<<"#"<<p->id<<" at "<<p->shape->nodes[0]->pos.transpose()<<", off0="<<off0<<endl;
for(off[0]=off0[0]-1; off[0]<=off0[0]+1; off[0]++) for(off[1]=off0[1]-1; off[1]<=off0[1]+1; off[1]++) for(off[2]=off0[2]-1; off[2]<=off0[2]+1; off[2]++){
Vector3r dx=scene->cell->intrShiftPos(off);
//cerr<<" off="<<off.transpose()<<", dx="<<dx.transpose()<<endl;
AlignedBox3r boxOff(box); boxOff.translate(dx);
//cerr<<" boxOff="<<boxOff.min()<<";"<<boxOff.max()<<" | cell="<<cell.min()<<";"<<cell.max()<<endl;
if(boxOff.intersection(cell).isEmpty()) continue;
// copy the entire triangulation, offset by dx
vector<Vector3r> pts2(pts); for(auto& p: pts2) p+=dx;
vector<Vector3i> tri2(tri); // same topology
ppts.push_back(pts2);
ttri.push_back(tri2);
LOG_TRACE(" offset "<<off.transpose()<<": #"<<p->id<<": "<<tri2.size()<<","<<pts2.size()<<" faces,vertices.");
}
}
}
if(!merge){
LOG_DEBUG("Will export (unmerged) "<<ppts.size()<<" particles to STL.");
stl<<"solid "<<solid<<"\n";
for(size_t i=0; i<ppts.size(); i++){
const auto& pts(ppts[i]);
const auto& tri(ttri[i]);
LOG_TRACE("Exporting "<<i<<" with "<<tri.size()<<" faces.");
for(const Vector3i& t: tri){
Vector3r pp[]={pts[t[0]],pts[t[1]],pts[t[2]]};
// skip triangles which are entirely out of the canonical periodic cell
if(scene->isPeriodic && clipCell && (!scene->cell->isCanonical(pp[0]) && !scene->cell->isCanonical(pp[1]) && !scene->cell->isCanonical(pp[2]))) continue;
numTri++;
Vector3r n=(pp[1]-pp[0]).cross(pp[2]-pp[1]).normalized();
stl<<" facet normal "<<n.x()<<" "<<n.y()<<" "<<n.z()<<"\n";
stl<<" outer loop\n";
for(auto p: {pp[0],pp[1],pp[2]}){
stl<<" vertex "<<p[0]<<" "<<p[1]<<" "<<p[2]<<"\n";
}
stl<<" endloop\n";
stl<<" endfacet\n";
}
}
stl<<"endsolid "<<solid<<"\n";
stl.close();
return numTri;
}
#if WOO_GTS
/*****
Convert all triangulation to GTS surfaces, find their distances, isolate connected components,
merge these components incrementally and write to STL
*****/
// total number of points
const size_t N(ppts.size());
// bounds for collision detection
struct Bound{
Bound(Real _coord, int _id, bool _isMin): coord(_coord), id(_id), isMin(_isMin){};
Bound(): coord(NaN), id(-1), isMin(false){}; // just for allocation
Real coord;
int id;
bool isMin;
bool operator<(const Bound& b) const { return coord<b.coord; }
};
vector<Bound> bounds[3]={vector<Bound>(2*N),vector<Bound>(2*N),vector<Bound>(2*N)};
/* construct GTS surface objects; all objects must be deleted explicitly! */
vector<GtsSurface*> ssurf(N);
vector<vector<GtsVertex*>> vvert(N);
vector<vector<GtsEdge*>> eedge(N);
vector<AlignedBox3r> boxes(N);
for(size_t i=0; i<N; i++){
LOG_TRACE("** Creating GTS surface for #"<<i<<", with "<<ttri[i].size()<<" faces, "<<ppts[i].size()<<" vertices.");
AlignedBox3r box;
// new surface object
ssurf[i]=gts_surface_new(gts_surface_class(),gts_face_class(),gts_edge_class(),gts_vertex_class());
// copy over all vertices
vvert[i].reserve(ppts[i].size());
eedge[i].reserve(size_t(1.5*ttri[i].size())); // each triangle consumes 1.5 edges, for closed surfs
for(size_t v=0; v<ppts[i].size(); v++){
vvert[i].push_back(gts_vertex_new(gts_vertex_class(),ppts[i][v][0],ppts[i][v][1],ppts[i][v][2]));
box.extend(ppts[i][v]);
}
// create faces, and create edges on the fly as needed
std::map<std::pair<int,int>,int> edgeIndices;
for(size_t t=0; t<ttri[i].size(); t++){
//const Vector3i& t(ttri[i][t]);
//LOG_TRACE("Face with vertices "<<ttri[i][t][0]<<","<<ttri[i][t][1]<<","<<ttri[i][t][2]);
Vector3i eIxs;
for(int a:{0,1,2}){
int A(ttri[i][t][a]), B(ttri[i][t][(a+1)%3]);
auto AB=std::make_pair(min(A,B),max(A,B));
auto ABI=edgeIndices.find(AB);
if(ABI==edgeIndices.end()){ // this edge not created yet
edgeIndices[AB]=eedge[i].size(); // last index
eIxs[a]=eedge[i].size();
//LOG_TRACE(" New edge #"<<eIxs[a]<<": "<<A<<"--"<<B<<" (length "<<(ppts[i][A]-ppts[i][B]).norm()<<")");
eedge[i].push_back(gts_edge_new(gts_edge_class(),vvert[i][A],vvert[i][B]));
} else {
eIxs[a]=ABI->second;
//LOG_TRACE(" Found edge #"<<ABI->second<<" for "<<A<<"--"<<B);
}
}
//LOG_TRACE(" New face: edges "<<eIxs[0]<<"--"<<eIxs[1]<<"--"<<eIxs[2]);
GtsFace* face=gts_face_new(gts_face_class(),eedge[i][eIxs[0]],eedge[i][eIxs[1]],eedge[i][eIxs[2]]);
gts_surface_add_face(ssurf[i],face);
}
// make sure the surface is OK
if(!gts_surface_is_orientable(ssurf[i])) LOG_ERROR("Surface of #"+to_string(iid[i])+" is not orientable (expect troubles).");
if(!gts_surface_is_closed(ssurf[i])) LOG_ERROR("Surface of #"+to_string(iid[i])+" is not closed (expect troubles).");
assert(!gts_surface_is_self_intersecting(ssurf[i]));
// copy bounds
LOG_TRACE("Setting bounds of surf #"<<i);
boxes[i]=box;
for(int ax:{0,1,2}){
bounds[ax][2*i+0]=Bound(box.min()[ax],/*id*/i,/*isMin*/true);
bounds[ax][2*i+1]=Bound(box.max()[ax],/*id*/i,/*isMin*/false);
}
}
/*
broad-phase collision detection between GTS surfaces
only those will be probed with exact algorithms below and merged if needed
*/
for(int ax:{0,1,2}) std::sort(bounds[ax].begin(),bounds[ax].end());
vector<Bound>& bb(bounds[0]); // run the search along x-axis, does not matter really
std::list<std::pair<int,int>> int0; // broad-phase intersections
for(size_t i=0; i<2*N; i++){
if(!bb[i].isMin) continue; // only start with lower bound
// go up to the upper bound, but handle overflow safely (no idea why it would happen here) as well
for(size_t j=i+1; j<2*N && bb[j].id!=bb[i].id; j++){
if(bb[j].isMin) continue; // this is handled by symmetry
#if EIGEN_VERSION_AT_LEAST(3,2,5)
if(!boxes[bb[i].id].intersects(boxes[bb[j].id])) continue; // no intersection along all axes
#else
// old, less elegant
if(boxes[bb[i].id].intersection(boxes[bb[j].id]).isEmpty()) continue;
#endif
int0.push_back(std::make_pair(min(bb[i].id,bb[j].id),max(bb[i].id,bb[j].id)));
LOG_TRACE("Broad-phase collision "<<int0.back().first<<"+"<<int0.back().second);
}
}
/*
narrow-phase collision detection between GTS surface
this must be done via gts_surface_inter_new, since gts_surface_distance always succeeds
*/
std::list<std::pair<int,int>> int1;
for(const std::pair<int,int> ij: int0){
LOG_TRACE("Testing narrow-phase collision "<<ij.first<<"+"<<ij.second);
#if 0
GtsRange gr1, gr2;
gts_surface_distance(ssurf[ij.first],ssurf[ij.second],/*delta ??*/(gfloat).2,&gr1,&gr2);
if(gr1.min>0 && gr2.min>0) continue;
LOG_TRACE(" GTS reports collision "<<ij.first<<"+"<<ij.second<<" (min. distances "<<gr1.min<<", "<<gr2.min);
#else
GtsSurface *s1(ssurf[ij.first]), *s2(ssurf[ij.second]);
GNode* t1=gts_bb_tree_surface(s1);
GNode* t2=gts_bb_tree_surface(s2);
GtsSurfaceInter* I=gts_surface_inter_new(gts_surface_inter_class(),s1,s2,t1,t2,/*is_open_1*/false,/*is_open_2*/false);
GSList* l=gts_surface_intersection(s1,s2,t1,t2); // list of edges describing intersection
int n1=g_slist_length(l);
// extra check by looking at number of faces of the intersected surface
#if 1
GtsSurface* s12=gts_surface_new(gts_surface_class(),gts_face_class(),gts_edge_class(),gts_vertex_class());
gts_surface_inter_boolean(I,s12,GTS_1_OUT_2);
gts_surface_inter_boolean(I,s12,GTS_2_OUT_1);
int n2=gts_surface_face_number(s12);
gts_object_destroy(GTS_OBJECT(s12));
#endif
gts_bb_tree_destroy(t1,TRUE);
gts_bb_tree_destroy(t2,TRUE);
gts_object_destroy(GTS_OBJECT(I));
g_slist_free(l);
if(n1==0) continue;
#if 1
if(n2==0){ LOG_ERROR("n1==0 but n2=="<<n2<<" (no narrow-phase collision)"); continue; }
#endif
LOG_TRACE(" GTS reports collision "<<ij.first<<"+"<<ij.second<<" ("<<n<<" edges describe the intersection)");
#endif
int1.push_back(ij);
}
/*
connected components on the graph: graph nodes are 0…(N-1), graph edges are in int1
see http://stackoverflow.com/a/37195784/761090
*/
typedef boost::subgraph<boost::adjacency_list<boost::vecS,boost::vecS,boost::undirectedS,boost::property<boost::vertex_index_t,int>,boost::property<boost::edge_index_t,int>>> Graph;
Graph graph(N);
for(const auto& ij: int1) boost::add_edge(ij.first,ij.second,graph);
vector<size_t> clusters(boost::num_vertices(graph));
size_t numClusters=boost::connected_components(graph,clusters.data());
for(size_t n=0; n<numClusters; n++){
// beginning cluster #n
// first, count how many surfaces are in this cluster; if 1, things are easier
int numThisCluster=0; int cluster1st=-1;
for(size_t i=0; i<N; i++){ if(clusters[i]!=n) continue; numThisCluster++; if(cluster1st<0) cluster1st=(int)i; }
GtsSurface* clusterSurf=NULL;
LOG_DEBUG("Cluster "<<n<<" has "<<numThisCluster<<" surfaces.");
if(numThisCluster==1){
clusterSurf=ssurf[cluster1st];
} else {
clusterSurf=ssurf[cluster1st]; // surface of the cluster itself
LOG_TRACE(" Initial cluster surface from "<<cluster1st<<".");
/* composed surface */
for(size_t i=0; i<N; i++){
if(clusters[i]!=n || ((int)i)==cluster1st) continue;
LOG_TRACE(" Adding "<<i<<" to the cluster");
// ssurf[i] now belongs to cluster #n
// trees need to be rebuild every time anyway, since the merged surface keeps changing in every cycle
//if(gts_surface_face_number(clusterSurf)==0) LOG_ERROR("clusterSurf has 0 faces.");
//if(gts_surface_face_number(ssurf[i])==0) LOG_ERROR("Surface #"<<i<<" has 0 faces.");
GNode* t1=gts_bb_tree_surface(clusterSurf);
GNode* t2=gts_bb_tree_surface(ssurf[i]);
GtsSurfaceInter* I=gts_surface_inter_new(gts_surface_inter_class(),clusterSurf,ssurf[i],t1,t2,/*is_open_1*/false,/*is_open_2*/false);
GtsSurface* merged=gts_surface_new(gts_surface_class(),gts_face_class(),gts_edge_class(),gts_vertex_class());
gts_surface_inter_boolean(I,merged,GTS_1_OUT_2);
gts_surface_inter_boolean(I,merged,GTS_2_OUT_1);
gts_object_destroy(GTS_OBJECT(I));
gts_bb_tree_destroy(t1,TRUE);
gts_bb_tree_destroy(t2,TRUE);
if(gts_surface_face_number(merged)==0){
LOG_ERROR("Cluster #"<<n<<": 0 faces after fusing #"<<i<<" (why?), adding #"<<i<<" separately!");
// this will cause an extra 1-particle cluster to be created
clusters[i]=numClusters;
numClusters+=1;
} else {
// not from global vectors (cleanup at the end), explicit delete!
if(clusterSurf!=ssurf[cluster1st]) gts_object_destroy(GTS_OBJECT(clusterSurf));
clusterSurf=merged;
}
}
}
#if 0
LOG_TRACE(" GTS surface cleanups...");
pygts_vertex_cleanup(clusterSurf,.1*tol); // cleanup 10× smaller than tolerance
pygts_edge_cleanup(clusterSurf);
pygts_face_cleanup(clusterSurf);
#endif
LOG_TRACE(" STL: cluster "<<n<<" output");
stl<<"solid "<<solid<<"_"<<n<<"\n";
/* output cluster to STL here */
_gts_face_to_stl_data data(stl,scene,clipCell,numTri);
gts_surface_foreach_face(clusterSurf,(GtsFunc)_gts_face_to_stl,(gpointer)&data);
stl<<"endsolid\n";
if(clusterSurf!=ssurf[cluster1st]) gts_object_destroy(GTS_OBJECT(clusterSurf));
}
// this deallocates also edges and vertices
for(size_t i=0; i<ssurf.size(); i++) gts_object_destroy(GTS_OBJECT(ssurf[i]));
return numTri;
#endif /* WOO_GTS */
}
int main (int argc, char * argv[])
{
gboolean verbose = FALSE;
gboolean triangulate_holes = TRUE;
gboolean write_holes = FALSE;
int c = 0;
CartesianGrid * grid;
guint line = 0;
GtsSurface * s;
GTimer * timer;
if (!setlocale (LC_ALL, "POSIX"))
g_warning ("cannot set locale to POSIX");
/* parse options using getopt */
while (c != EOF) {
#ifdef HAVE_GETOPT_LONG
static struct option long_options[] = {
{"holes", no_argument, NULL, 'H'},
{"keep", no_argument, NULL, 'k'},
{"help", no_argument, NULL, 'h'},
{"verbose", no_argument, NULL, 'v'},
{ NULL }
};
int option_index = 0;
switch ((c = getopt_long (argc, argv, "hvHk",
long_options, &option_index))) {
#else /* not HAVE_GETOPT_LONG */
switch ((c = getopt (argc, argv, "hvHk"))) {
#endif /* not HAVE_GETOPT_LONG */
case 'H': /* holes */
write_holes = TRUE;
break;
case 'k': /* keep */
triangulate_holes = FALSE;
break;
case 'v': /* verbose */
verbose = TRUE;
break;
case 'h': /* help */
fprintf (stderr,
"Usage: cartesian [OPTION] < FILE\n"
"Triangulates vertices of a regular cartesian mesh\n"
"(possibly containing holes)\n"
"\n"
" -k --keep keep holes\n"
" -H --holes write holes only\n"
" -v --verbose print statistics about the surface\n"
" -h --help display this help and exit\n"
"\n"
"Reports bugs to %s\n",
GTS_MAINTAINER);
return 0; /* success */
break;
case '?': /* wrong options */
fprintf (stderr, "Try `cartesian --help' for more information.\n");
return 1; /* failure */
}
}
grid = cartesian_grid_read (gts_vertex_class (), &line);
if (grid == NULL) {
fprintf (stderr,
"cartesian: file on standard input is not a valid cartesian grid\n"
"error at line %u\n", line);
return 1;
}
timer = g_timer_new ();
g_timer_start (timer);
s = gts_surface_new (gts_surface_class (),
gts_face_class (),
gts_edge_class (),
gts_vertex_class ());
cartesian_grid_triangulate (grid, s);
if (triangulate_holes) {
GtsSurface * holes = cartesian_grid_triangulate_holes (grid, s);
if (write_holes) {
gts_object_destroy (GTS_OBJECT (s));
s = holes;
}
else
gts_surface_merge (s, holes);
}
g_timer_stop (timer);
if (verbose) {
gts_surface_print_stats (s, stderr);
fprintf (stderr, "# Triangulation time: %g s speed: %.0f vertex/s\n",
g_timer_elapsed (timer, NULL),
gts_surface_vertex_number (s)/g_timer_elapsed (timer, NULL));
}
gts_surface_write (s, stdout);
return 0; /* success */
}
/**
* gts_graph_bfgg_bisection:
* @g: a #GtsGraph.
* @ntry: the number of randomly selected initial seeds.
*
* An implementation of a "Breadth-First Graph Growing" algorithm.
*
* @ntry randomly chosen seeds are used and the best partition is retained.
*
* Returns: a new #GtsGraphBisection of @g.
*/
GtsGraphBisection * gts_graph_bfgg_bisection (GtsGraph * g, guint ntry)
{
gfloat size, bestcost = G_MAXFLOAT, smin;
GtsGraph * bestg1 = NULL, * bestg2 = NULL;
GtsEHeap * degree_heap;
GtsGNode * seed;
GtsGraphBisection * bg;
g_return_val_if_fail (g != NULL, NULL);
bg = g_malloc (sizeof (GtsGraphBisection));
bg->g = g;
size = gts_graph_weight (g)/2.;
smin = 0.9*size;
degree_heap = gts_eheap_new ((GtsKeyFunc) degree_cost, g);
gts_eheap_freeze (degree_heap);
gts_container_foreach (GTS_CONTAINER (g), (GtsFunc) add_seed, degree_heap);
gts_eheap_thaw (degree_heap);
while (ntry && ((seed = gts_eheap_remove_top (degree_heap, NULL)))) {
GtsGraph * g1, * g2;
GtsGNode * n;
gdouble cost;
GtsGraphTraverse * t = gts_graph_traverse_new (g, seed,
GTS_BREADTH_FIRST, TRUE);
g1 = gts_graph_new (GTS_GRAPH_CLASS (GTS_OBJECT (g)->klass),
g->node_class, g->edge_class);
g2 = gts_graph_new (GTS_GRAPH_CLASS (GTS_OBJECT (g)->klass),
g->node_class, g->edge_class);
while ((n = gts_graph_traverse_next (t)))
if (gts_graph_weight (g1) + gts_gnode_weight (n) <= size) {
gts_container_add (GTS_CONTAINER (g1), GTS_CONTAINEE (n));
GTS_OBJECT (n)->reserved = n;
}
gts_graph_traverse_destroy (t);
gts_container_foreach (GTS_CONTAINER (g), (GtsFunc) add_unused, g2);
cost = gts_graph_edges_cut_weight (g1);
if (!bestg1 || (cost < bestcost && gts_graph_weight (g1) >= smin)) {
if (bestg1)
bestcost = cost;
if (bestg1)
gts_object_destroy (GTS_OBJECT (bestg1));
if (bestg2)
gts_object_destroy (GTS_OBJECT (bestg2));
bestg1 = g1;
bestg2 = g2;
}
else {
gts_object_destroy (GTS_OBJECT (g1));
gts_object_destroy (GTS_OBJECT (g2));
}
ntry--;
}
gts_eheap_destroy (degree_heap);
#ifdef DEBUG
fprintf (stderr, "bestcost: %5g g1: %5g|%5d g2: %5g|%5d\n",
bestcost,
gts_graph_weight (bestg1),
gts_container_size (GTS_CONTAINER (bestg1)),
gts_graph_weight (bestg2),
gts_container_size (GTS_CONTAINER (bestg2)));
#endif
bg->g1 = bestg1;
bg->g2 = bestg2;
/* boundary nodes */
bg->bg1 = g_hash_table_new (NULL, NULL);
gts_container_foreach (GTS_CONTAINER (bg->g1), (GtsFunc) boundary_node1, bg);
bg->bg2 = g_hash_table_new (NULL, NULL);
gts_container_foreach (GTS_CONTAINER (bg->g2), (GtsFunc) boundary_node2, bg);
return bg;
}
void gts_polygon_triangulate_test()
{
int i;
gdouble v[12][3] = {
{0.0, 0.0, 0.0},
{0.0, 3.0, 0.0},
{3.0, 3.0, 0.0},
{3.0, 1.0, 0.0},
{4.0, 1.0, 0.0},
{4.0, 3.0, 0.0},
{5.0, 3.0, 0.0},
{5.0, 0.0, 0.0},
{2.0, 0.0, 0.0},
{2.0, 2.0, 0.0},
{1.0, 2.0, 0.0},
{1.0, 0.0, 0.0},
};
GtsVector normal = {0,0,0};
GtsVertex *vtx[12];
GCList *polygon = NULL;
GCList *triangle = NULL;
GtsSurface *s, *s2;
GtsEdgePool *pool = gts_edge_pool_new(gts_edge_pool_class());
gts_triangulate_test_stuff();
for (i = 0; i < 12; ++i) {
vtx[i] = gts_vertex_new(gts_vertex_class(), v[i][0],v[i][1],v[i][2]);
polygon = g_clist_append(polygon, vtx[i]);
}
for (i = 0; i < 3; ++i) {
triangle = g_clist_prepend(triangle, vtx[i]);
}
s = gts_surface_new(gts_surface_class(),
gts_face_class(),
gts_edge_class(),
gts_vertex_class());
s2 = gts_surface_new(gts_surface_class(),
gts_face_class(),
gts_edge_class(),
gts_vertex_class());
// triangulate the polygon by using its own orientation
polygon = gts_surface_add_polygon(s, pool, polygon, normal);
// do some test ?
g_assert(gts_surface_face_number(s) == 10);
g_debug("area = %f", gts_surface_area(s));
g_assert(gts_surface_area(s) == 11.0);
gts_object_destroy(GTS_OBJECT(pool));
// cleanup
g_clist_free(triangle);
g_clist_free(polygon);
gts_object_destroy(GTS_OBJECT(s));
gts_object_destroy(GTS_OBJECT(s2));
g_message("Triangulate PASSED");
}
/**
* gts_hsurface_new:
* @klass: a #GtsHSurfaceClass.
* @hsplit_class: a #GtsHSplitClass.
* @psurface: a #GtsPSurface.
* @expand_key: a #GtsKeyFunc used to order the priority heap of expandable
* #GtsHSplit.
* @expand_data: data to be passed to @expand_key.
* @collapse_key: a #GtsKeyFunc used to order the priority heap of collapsable
* #GtsHSplit.
* @collapse_data: data to be passed to @collapsed_key.
*
* Returns: a new #GtsHSurface, hierarchical extension of @psurface
* and using #GtsHSplit of class @hsplit_class. Note that @psurface is
* destroyed in the process.
*/
GtsHSurface * gts_hsurface_new (GtsHSurfaceClass * klass,
GtsHSplitClass * hsplit_class,
GtsPSurface * psurface,
GtsKeyFunc expand_key,
gpointer expand_data,
GtsKeyFunc collapse_key,
gpointer collapse_data)
{
GtsHSurface * hsurface;
g_return_val_if_fail (klass != NULL, NULL);
g_return_val_if_fail (hsplit_class != NULL, NULL);
g_return_val_if_fail (psurface != NULL, NULL);
g_return_val_if_fail (expand_key != NULL, NULL);
g_return_val_if_fail (collapse_key != NULL, NULL);
hsurface = GTS_HSURFACE (gts_object_new (GTS_OBJECT_CLASS (klass)));
hsurface->s = psurface->s;
hsurface->expandable = gts_eheap_new (expand_key, expand_data);
hsurface->collapsable = gts_eheap_new (collapse_key, collapse_data);
g_ptr_array_set_size (hsurface->split, psurface->split->len);
while (gts_psurface_remove_vertex (psurface))
;
while (psurface->pos) {
GtsSplit * vs = g_ptr_array_index (psurface->split, psurface->pos - 1);
GtsHSplit * hs = gts_hsplit_new (hsplit_class, vs);
g_ptr_array_index (hsurface->split, psurface->pos - 1) = hs;
psurface->pos--;
hs->parent = GTS_OBJECT (vs)->reserved;
if (hs->parent) {
GtsSplit * vsp = GTS_SPLIT (hs->parent);
if (vsp->v1 == GTS_OBJECT (vs)) {
g_assert (vsp->v2 != GTS_OBJECT (vs));
vsp->v1 = GTS_OBJECT (hs);
}
else {
g_assert (vsp->v2 == GTS_OBJECT (vs));
vsp->v2 = GTS_OBJECT (hs);
}
}
else
hsurface->roots = g_slist_prepend (hsurface->roots, hs);
hs->nchild = 0;
if (GTS_IS_SPLIT (vs->v1))
GTS_OBJECT (vs->v1)->reserved = hs;
else
hs->nchild++;
if (GTS_IS_SPLIT (vs->v2))
GTS_OBJECT (vs->v2)->reserved = hs;
else
hs->nchild++;
gts_split_expand (vs, psurface->s, psurface->s->edge_class);
if (hs->nchild == 2)
HEAP_INSERT_HSPLIT (hsurface->collapsable, hs);
}
hsurface->nvertex = gts_surface_vertex_number (hsurface->s);
gts_object_destroy (GTS_OBJECT (psurface));
return hsurface;
}
/* inside - check if points are inside a surface */
int main (int argc, char * argv[])
{
GtsSurface * s1;
GNode * tree1;
GtsPoint P;
FILE * fptr;
GtsFile * fp;
int c = 0, cnt = 0;
double x,y,z;
gboolean verbose = FALSE;
gchar * file1, * file2;
gboolean is_open1, is_inside;
if (!setlocale (LC_ALL, "POSIX"))
g_warning ("cannot set locale to POSIX");
/* parse options using getopt */
while (c != EOF) {
#ifdef HAVE_GETOPT_LONG
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"verbose", no_argument, NULL, 'v'}
};
int option_index = 0;
switch ((c = getopt_long (argc, argv, "shv",
long_options, &option_index))) {
#else /* not HAVE_GETOPT_LONG */
switch ((c = getopt (argc, argv, "shv"))) {
#endif /* not HAVE_GETOPT_LONG */
case 'v': /* verbose */
verbose = TRUE;
break;
case 'h': /* help */
fprintf (stderr,
"Usage: gtsinside [OPTION] FILE1 FILE2\n"
"Test whether points are inside a closed surface.\n"
"FILE1 is a surface file. FILE2 is a text file where each line\n"
"contains the three coordinates of a point, separated with blanks.\n"
"\n"
" -v --verbose print statistics about the surface\n"
" -h --help display this help and exit\n"
"\n"
"Reports bugs to %s\n",
"https://savannah.nongnu.org/projects/pyformex/");
return 0; /* success */
break;
case '?': /* wrong options */
fprintf (stderr, "Try `gtsinside --help' for more information.\n");
return 1; /* failure */
}
}
if (optind >= argc) { /* missing FILE1 */
fprintf (stderr,
"gtsinside: missing FILE1\n"
"Try `inside --help' for more information.\n");
return 1; /* failure */
}
file1 = argv[optind++];
if (optind >= argc) { /* missing FILE2 */
fprintf (stderr,
"gtsinside: missing FILE2\n"
"Try `gtsinside --help' for more information.\n");
return 1; /* failure */
}
file2 = argv[optind++];
/* open first file */
if ((fptr = fopen (file1, "rt")) == NULL) {
fprintf (stderr, "gtsinside: can not open file `%s'\n", file1);
return 1;
}
/* reads in first surface file */
s1 = GTS_SURFACE (gts_object_new (GTS_OBJECT_CLASS (gts_surface_class ())));
fp = gts_file_new (fptr);
if (gts_surface_read (s1, fp)) {
fprintf (stderr, "gtsinside: `%s' is not a valid GTS surface file\n",
file1);
fprintf (stderr, "%s:%d:%d: %s\n", file1, fp->line, fp->pos, fp->error);
return 1;
}
gts_file_destroy (fp);
fclose (fptr);
/* open second file */
if ((fptr = fopen (file2, "rt")) == NULL) {
fprintf (stderr, "gtsinside: can not open file `%s'\n", file2);
return 1;
}
/* display summary information about the surface */
if (verbose) {
gts_surface_print_stats (s1, stderr);
}
/* check that the surface is an orientable manifold */
if (!gts_surface_is_orientable (s1)) {
fprintf (stderr, "gtsinside: surface `%s' is not an orientable manifold\n",
file1);
return 1;
}
/* build bounding box tree for the surface */
tree1 = gts_bb_tree_surface (s1);
is_open1 = gts_surface_volume (s1) < 0. ? TRUE : FALSE;
/* scan file 2 for points and determine if it they are inside surface */
while ( fscanf(fptr, "%lg %lg %lg", &x, &y, &z) == 3 ) {
P.x = x; P.y = y; P.z = z;
is_inside = gts_point_is_inside_surface(&P,tree1,is_open1);
if (is_inside) printf("%d\n",cnt);
//printf("Point %d: %lf, %lf, %lf: %d\n",cnt,P.x,P.y,P.z,is_inside);
cnt++;
}
if ( !feof(fptr) ) {
fprintf (stderr, "gtsinside: error while reading points from file `%s'\n",
file2);
return 1;
}
fclose (fptr);
/* destroy surface */
gts_object_destroy (GTS_OBJECT (s1));
/* destroy bounding box tree (including bounding boxes) */
gts_bb_tree_destroy (tree1, TRUE);
return 0;
}
static void gfs_refine_destroy (GtsObject * o)
{
gts_object_destroy (GTS_OBJECT (GFS_REFINE (o)->maxlevel));
(* GTS_OBJECT_CLASS (gfs_refine_class ())->parent_class->destroy) (o);
}
/**
* gts_graph_bubble_partition:
* @g: a #GtsGraph.
* @np: number of partitions.
* @niter: the maximum number of iterations.
* @step_info: a #GtsFunc or %NULL.
* @data: user data to pass to @step_info.
*
* An implementation of the "bubble partitioning algorithm" of
* Diekmann, Preis, Schlimbach and Walshaw (2000). The maximum number
* of iteration on the positions of the graph growing seeds is
* controlled by @niter.
*
* If not %NULL @step_info is called after each iteration on the seeds
* positions passing the partition (a GSList) as argument.
*
* Returns: a list of @np new #GtsGraph representing the partition.
*/
GSList * gts_graph_bubble_partition (GtsGraph * g,
guint np,
guint niter,
GtsFunc step_info,
gpointer data)
{
GSList * list = NULL, * seeds = NULL;
GtsGNode * seed = NULL;
guint min = G_MAXINT/2 - 1;
gpointer info[3];
GtsGraph * g1;
gboolean changed = TRUE;
g_return_val_if_fail (g != NULL, NULL);
g_return_val_if_fail (np > 0, NULL);
info[0] = &seed;
info[1] = g;
info[2] = &min;
gts_container_foreach (GTS_CONTAINER (g),
(GtsFunc) find_smallest_degree,
info);
if (seed == NULL)
return NULL;
g1 = GTS_GRAPH (gts_object_new (GTS_OBJECT (g)->klass));
gts_container_add (GTS_CONTAINER (g1), GTS_CONTAINEE (seed));
list = g_slist_prepend (list, g1);
GTS_OBJECT (g1)->reserved = seed;
seeds = g_slist_prepend (seeds, seed);
while (--np && seed)
if ((seed = gts_graph_farthest (g, seeds))) {
g1 = GTS_GRAPH (gts_object_new (GTS_OBJECT (g)->klass));
gts_container_add (GTS_CONTAINER (g1), GTS_CONTAINEE (seed));
list = g_slist_prepend (list, g1);
GTS_OBJECT (g1)->reserved = seed;
seeds = g_slist_prepend (seeds, seed);
}
g_slist_free (seeds);
partition_update (list, g);
while (changed && niter--) {
GSList * i;
changed = FALSE;
i = list;
while (i) {
GtsGraph * g1 = i->data;
GtsGNode * seed = GTS_OBJECT (g1)->reserved;
GtsGNode * new_seed = graph_new_seed (g1, seed);
if (new_seed != seed) {
changed = TRUE;
GTS_OBJECT (g1)->reserved = new_seed;
}
i = i->next;
}
if (changed) {
i = list;
while (i) {
GtsGraph * g1 = i->data;
GtsGNode * seed = GTS_OBJECT (g1)->reserved;
gts_object_destroy (GTS_OBJECT (g1));
i->data = g1 = GTS_GRAPH (gts_object_new (GTS_OBJECT (g)->klass));
gts_container_add (GTS_CONTAINER (g1), GTS_CONTAINEE (seed));
GTS_OBJECT (g1)->reserved = seed;
i = i->next;
}
partition_update (list, g);
if (step_info)
(* step_info) (list, data);
}
}
g_slist_foreach (list, (GFunc) gts_object_reset_reserved, NULL);
return list;
}
/**
* gts_graph_ggg_bisection:
* @g: a #GtsGraph.
* @ntry: the number of randomly selected initial seeds.
*
* An implementation of the "Greedy Graph Growing" algorithm of
* Karypis and Kumar (1997).
*
* @ntry randomly chosen seeds are used and the best partition is retained.
*
* Returns: a new #GtsGraphBisection of @g.
*/
GtsGraphBisection * gts_graph_ggg_bisection (GtsGraph * g, guint ntry)
{
gfloat size, bestcost = G_MAXFLOAT, smin;
GtsGraph * bestg1 = NULL, * bestg2 = NULL;
gboolean balanced = FALSE;
GtsEHeap * degree_heap;
GtsGNode * seed;
GtsGraphBisection * bg;
g_return_val_if_fail (g != NULL, NULL);
bg = g_malloc (sizeof (GtsGraphBisection));
bg->g = g;
size = gts_graph_weight (g)/2.;
smin = 0.9*size;
degree_heap = gts_eheap_new ((GtsKeyFunc) degree_cost, g);
gts_eheap_freeze (degree_heap);
gts_container_foreach (GTS_CONTAINER (g), (GtsFunc) add_seed, degree_heap);
gts_eheap_thaw (degree_heap);
while (ntry && ((seed = gts_eheap_remove_top (degree_heap, NULL)))) {
GtsGraph * g1, * g2;
GtsGNode * n;
gdouble cost;
gpointer data[2];
GtsEHeap * heap;
g1 = gts_graph_new (GTS_GRAPH_CLASS (GTS_OBJECT (g)->klass),
g->node_class, g->edge_class);
g2 = gts_graph_new (GTS_GRAPH_CLASS (GTS_OBJECT (g)->klass),
g->node_class, g->edge_class);
data[0] = g;
data[1] = g1;
heap = gts_eheap_new ((GtsKeyFunc) node_cost, data);
gts_container_add (GTS_CONTAINER (g1), GTS_CONTAINEE (seed));
GTS_OBJECT (seed)->reserved = seed;
gts_gnode_foreach_neighbor (seed, g, (GtsFunc) add_neighbor, heap);
while ((n = gts_eheap_remove_top (heap, &cost)))
if (gts_graph_weight (g1) + gts_gnode_weight (n) <= size) {
gts_container_add (GTS_CONTAINER (g1), GTS_CONTAINEE (n));
GTS_OBJECT (n)->reserved = n;
gts_gnode_foreach_neighbor (n, g, (GtsFunc) add_neighbor, heap);
}
else
GTS_OBJECT (n)->reserved = NULL;
gts_eheap_destroy (heap);
gts_container_foreach (GTS_CONTAINER (g), (GtsFunc) add_unused, g2);
cost = gts_graph_edges_cut_weight (g1);
if (!bestg1 ||
(!balanced && gts_graph_weight (g1) >= smin) ||
(cost < bestcost && gts_graph_weight (g1) >= smin)) {
if (bestg1)
bestcost = cost;
if (bestg1)
gts_object_destroy (GTS_OBJECT (bestg1));
if (bestg2)
gts_object_destroy (GTS_OBJECT (bestg2));
bestg1 = g1;
bestg2 = g2;
if (gts_graph_weight (g1) >= smin)
balanced = TRUE;
}
else {
gts_object_destroy (GTS_OBJECT (g1));
gts_object_destroy (GTS_OBJECT (g2));
}
ntry--;
}
gts_eheap_destroy (degree_heap);
#ifdef DEBUG
fprintf (stderr, "bestcost: %5g g1: %5g|%5d g2: %5g|%5d\n",
bestcost,
gts_graph_weight (bestg1),
gts_container_size (GTS_CONTAINER (bestg1)),
gts_graph_weight (bestg2),
gts_container_size (GTS_CONTAINER (bestg2)));
#endif
g_assert (bestg1 != NULL);
bg->g1 = bestg1;
g_assert (bestg2 != NULL);
bg->g2 = bestg2;
/* boundary nodes */
bg->bg1 = g_hash_table_new (NULL, NULL);
gts_container_foreach (GTS_CONTAINER (bg->g1), (GtsFunc) boundary_node1, bg);
bg->bg2 = g_hash_table_new (NULL, NULL);
gts_container_foreach (GTS_CONTAINER (bg->g2), (GtsFunc) boundary_node2, bg);
return bg;
}
extern field_t* field_read_gfs(const char* file)
{
int argc = 0;
gfs_init(&argc,NULL);
FILE *st = fopen(file,"r");
if (!st)
{
fprintf(stderr,"failed to open %s\n",file);
return NULL;
}
GtsFile *fp = gts_file_new(st);
GfsSimulation *sim = gfs_simulation_read(fp);
if (!sim)
{
fprintf(stderr,
"file %s not a valid simulation file\n"
"line %d:%d: %s\n",
file,
fp->line,
fp->pos,
fp->error);
return NULL;
}
gts_file_destroy(fp);
fclose(st);
GfsDomain *gdom = GFS_DOMAIN(sim);
/* find the bounding box */
bbox_t *bb = NULL;
gfs_domain_cell_traverse(gdom,
FTT_PRE_ORDER,
FTT_TRAVERSE_NON_LEAFS,
0,
(FttCellTraverseFunc)ftt_bbox,
&bb);
if (!bb)
{
fprintf(stderr,"failed to determine bounding box\n");
return NULL;
}
#ifdef FRG_DEBUG
fprintf(stdout,
"%g %g %g %g\n",
bb->x.min,
bb->x.max,
bb->y.min,
bb->y.max);
#endif
/* tree depth and discretisation size */
int
depth = gfs_domain_depth(gdom),
nw = (int)(POW2(depth)*bbox_width(*bb)),
nh = (int)(POW2(depth)*bbox_height(*bb));
/* shave bbox for node-aligned rather than pixel */
double shave = bbox_width(*bb)/(2.0*nw);
bb->x.min += shave;
bb->x.max -= shave;
bb->y.min += shave;
bb->y.max -= shave;
/* create & intialise meshes */
bilinear_t* B[2];
int i;
for (i=0 ; i<2 ; i++)
{
if ((B[i] = bilinear_new()) == NULL) return NULL;
if (bilinear_dimension(nw,nh,*bb,B[i]) != ERROR_OK) return NULL;
}
ftts_t ftts;
ftts.B = B;
ftts.depth = depth;
if ((ftts.u = gfs_variable_from_name(gdom->variables,"U")) == NULL)
{
fprintf(stderr,"no variable U\n");
return NULL;
}
if ((ftts.v = gfs_variable_from_name(gdom->variables,"V")) == NULL)
{
fprintf(stderr,"no variable V\n");
return NULL;
}
gfs_domain_cell_traverse(gdom,
FTT_PRE_ORDER,
FTT_TRAVERSE_LEAFS,
-1,
(FttCellTraverseFunc)ftt_sample,
&ftts);
/* clean up */
free(bb);
gts_object_destroy(GTS_OBJECT(sim));
/* results */
field_t* F = malloc(sizeof(field_t));
if (!F) return NULL;
F->u = B[0];
F->v = B[1];
F->k = NULL;
return F;
}
static GtsSurface * cartesian_grid_triangulate_holes (CartesianGrid * grid,
GtsSurface * s)
{
GtsVertex * v1, * v2, * v3, * v4;
GtsEdge * e1, * e2, * e3, * e4, * e5;
gdouble w, h;
GtsSurface * box;
GSList * constraints = NULL, * vertices = NULL, * i;
gpointer data[2];
g_return_val_if_fail (grid != NULL, NULL);
g_return_val_if_fail (s != NULL, NULL);
/* build enclosing box */
w = grid->xmax - grid->xmin;
h = grid->ymax - grid->ymin;
v1 = gts_vertex_new (s->vertex_class, grid->xmin - w, grid->ymin - h, 0.);
v2 = gts_vertex_new (s->vertex_class, grid->xmax + w, grid->ymin - h, 0.);
v3 = gts_vertex_new (s->vertex_class, grid->xmax + w, grid->ymax + h, 0.);
v4 = gts_vertex_new (s->vertex_class, grid->xmin - w, grid->ymax + h, 0.);
e1 = gts_edge_new (s->edge_class, v1, v2);
e2 = gts_edge_new (s->edge_class, v2, v3);
e3 = gts_edge_new (s->edge_class, v3, v4);
e4 = gts_edge_new (s->edge_class, v4, v1);
e5 = gts_edge_new (s->edge_class, v1, v3);
box = gts_surface_new (GTS_SURFACE_CLASS (GTS_OBJECT (s)->klass),
s->face_class,
s->edge_class,
s->vertex_class);
gts_surface_add_face (box, gts_face_new (s->face_class, e1, e2, e5));
gts_surface_add_face (box, gts_face_new (s->face_class, e3, e4, e5));
/* build vertex and constraint list from the boundaries of the input
surface s */
data[0] = s;
data[1] = &constraints;
gts_surface_foreach_edge (s, (GtsFunc) build_constraint_list, data);
vertices = gts_vertices_from_segments (constraints);
/* triangulate holes */
i = vertices;
while (i) {
g_assert (!gts_delaunay_add_vertex (box, i->data, NULL));
i = i->next;
}
g_slist_free (vertices);
i = constraints;
while (i) {
g_assert (!gts_delaunay_add_constraint (box, i->data));
i = i->next;
}
/* destroy corners of the enclosing box */
gts_allow_floating_vertices = TRUE;
gts_object_destroy (GTS_OBJECT (v1));
gts_object_destroy (GTS_OBJECT (v2));
gts_object_destroy (GTS_OBJECT (v3));
gts_object_destroy (GTS_OBJECT (v4));
gts_allow_floating_vertices = FALSE;
/* remove parts of the mesh which are not holes */
i = constraints;
while (i) {
edge_mark_as_hole (i->data, box);
i = i->next;
}
g_slist_free (constraints);
/* remove marked and duplicate faces */
gts_surface_foreach_face_remove (box, (GtsFunc) face_is_marked, NULL);
/* box now contains only the triangulated holes. */
return box;
}
void
pygts_edge_cleanup(GtsSurface *s)
{
GSList *edges = NULL;
GSList *i, *ii, *cur, *parents=NULL;
PygtsEdge *edge;
GtsEdge *e, *duplicate;
g_return_if_fail(s != NULL);
/* build list of edges */
gts_surface_foreach_edge(s, (GtsFunc)build_list, &edges);
/* remove degenerate and duplicate edges.
Note: we could use gts_edges_merge() to remove the duplicates and then
remove the degenerate edges but it is more efficient to do everything
at once (and it's more pedagogical too ...) */
/* We want to control manually the destruction of edges */
gts_allow_floating_edges = TRUE;
i = edges;
while(i) {
e = (GtsEdge*)i->data;
if(GTS_SEGMENT(e)->v1 == GTS_SEGMENT(e)->v2) {
/* edge is degenerate */
if( !g_hash_table_lookup(obj_table,GTS_OBJECT(e)) ) {
/* destroy e */
gts_object_destroy(GTS_OBJECT(e));
}
}
else {
if((duplicate = gts_edge_is_duplicate(e))) {
/* Detach and save any parent triangles */
if( (edge = PYGTS_EDGE(g_hash_table_lookup(obj_table,GTS_OBJECT(e))))
!=NULL ) {
ii = e->triangles;
while(ii!=NULL) {
cur = ii;
ii = g_slist_next(ii);
if(PYGTS_IS_PARENT_TRIANGLE(cur->data)) {
e->triangles = g_slist_remove_link(e->triangles, cur);
parents = g_slist_prepend(parents,cur->data);
g_slist_free_1(cur);
}
}
}
/* replace e with its duplicate */
gts_edge_replace(e, duplicate);
/* Reattach the parent segments */
if( edge != NULL ) {
ii = parents;
while(ii!=NULL) {
e->triangles = g_slist_prepend(e->triangles, ii->data);
ii = g_slist_next(ii);
}
g_slist_free(parents);
parents = NULL;
}
if( !g_hash_table_lookup(obj_table,GTS_OBJECT(e)) ) {
/* destroy e */
gts_object_destroy(GTS_OBJECT (e));
}
}
}
i = g_slist_next(i);
}
/* don't forget to reset to default */
gts_allow_floating_edges = FALSE;
/* free list of edges */
g_slist_free (edges);
}
static void gts_constraint_split (GtsConstraint * c,
GtsSurface * s,
GtsFifo * fifo)
{
GSList * i;
GtsVertex * v1, * v2;
GtsEdge * e;
g_return_if_fail (c != NULL);
g_return_if_fail (s != NULL);
v1 = GTS_SEGMENT (c)->v1;
v2 = GTS_SEGMENT (c)->v2;
e = GTS_EDGE (c);
i = e->triangles;
while (i) {
GtsFace * f = i->data;
if (GTS_IS_FACE (f) && gts_face_has_parent_surface (f, s)) {
GtsVertex * v = gts_triangle_vertex_opposite (GTS_TRIANGLE (f), e);
if (gts_point_orientation (GTS_POINT (v1),
GTS_POINT (v2),
GTS_POINT (v)) == 0.) {
GSList * j = e->triangles;
GtsFace * f1 = NULL;
GtsEdge * e1, * e2;
/* replaces edges with constraints */
gts_triangle_vertices_edges (GTS_TRIANGLE (f), e,
&v1, &v2, &v, &e, &e1, &e2);
if (!GTS_IS_CONSTRAINT (e1)) {
GtsEdge * ne1 =
gts_edge_new (GTS_EDGE_CLASS (GTS_OBJECT (c)->klass), v2, v);
gts_edge_replace (e1, ne1);
gts_object_destroy (GTS_OBJECT (e1));
e1 = ne1;
if (fifo) gts_fifo_push (fifo, e1);
}
if (!GTS_IS_CONSTRAINT (e2)) {
GtsEdge * ne2 =
gts_edge_new (GTS_EDGE_CLASS (GTS_OBJECT (c)->klass), v, v1);
gts_edge_replace (e2, ne2);
gts_object_destroy (GTS_OBJECT (e2));
e2 = ne2;
if (fifo) gts_fifo_push (fifo, e2);
}
/* look for face opposite */
while (j && !f1) {
if (GTS_IS_FACE (j->data) &&
gts_face_has_parent_surface (j->data, s))
f1 = j->data;
j = j->next;
}
if (f1) { /* c is not a boundary of s */
GtsEdge * e3, * e4, * e5;
GtsVertex * v3;
gts_triangle_vertices_edges (GTS_TRIANGLE (f1), e,
&v1, &v2, &v3, &e, &e3, &e4);
e5 = gts_edge_new (s->edge_class, v, v3);
gts_surface_add_face (s, gts_face_new (s->face_class, e5, e2, e3));
gts_surface_add_face (s, gts_face_new (s->face_class, e5, e4, e1));
gts_object_destroy (GTS_OBJECT (f1));
}
gts_object_destroy (GTS_OBJECT (f));
return;
}
}
i = i->next;
}
}
PygtsVertex *
pygts_vertex_from_sequence(PyObject *tuple) {
guint i,N;
gdouble x=0,y=0,z=0;
PyObject *obj;
GtsVertex *v;
PygtsVertex *vertex;
/* Convert list into tuple */
if(PyList_Check(tuple)) {
tuple = PyList_AsTuple(tuple);
}
else {
Py_INCREF(tuple);
}
if(!PyTuple_Check(tuple)) {
Py_DECREF(tuple);
PyErr_SetString(PyExc_TypeError,"expected a list or tuple of vertices");
return NULL;
}
/* Get the tuple size */
if( (N = PyTuple_Size(tuple)) > 3 ) {
PyErr_SetString(PyExc_RuntimeError,
"expected a list or tuple of up to three floats");
Py_DECREF(tuple);
return NULL;
}
/* Get the coordinates */
for(i=0;i<N;i++) {
obj = PyTuple_GET_ITEM(tuple,i);
if(!PyFloat_Check(obj) && !PyLong_Check(obj)) {
PyErr_SetString(PyExc_TypeError,"expected a list or tuple of floats");
Py_DECREF(tuple);
return NULL;
}
if(i==0) {
if(PyFloat_Check(obj)) x = PyFloat_AsDouble(obj);
else x = (double)PyLong_AsLong(obj);
}
if(i==1) {
if(PyFloat_Check(obj)) y = PyFloat_AsDouble(obj);
else y = (double)PyLong_AsLong(obj);
}
if(i==2) {
if(PyFloat_Check(obj)) z = PyFloat_AsDouble(obj);
else z = (double)PyLong_AsLong(obj);
}
}
Py_DECREF(tuple);
/* Create the vertex */
if( (v = gts_vertex_new(gts_vertex_class(),x,y,z)) == NULL ) {
PyErr_SetString(PyExc_MemoryError,"could not create Vertex");
}
if( (vertex = pygts_vertex_new(v)) == NULL ) {
gts_object_destroy(GTS_OBJECT(v));
return NULL;
}
return vertex;
}
static GtsSurface * happrox (gray ** g, gint width, gint height,
CostFunc cost_func,
gpointer cost_data,
GtsStopFunc stop_func,
gpointer stop_data)
{
GtsSurface * s = gts_surface_new (gts_surface_class (),
GTS_FACE_CLASS (list_face_class ()),
gts_edge_class (),
gts_vertex_class ());
GtsVertex * v1 = gts_vertex_new (s->vertex_class, 0., 0., g[0][0]);
GtsVertex * v2 = gts_vertex_new (s->vertex_class,
0., height - 1, g[height - 1][0]);
GtsVertex * v3 = gts_vertex_new (s->vertex_class,
width - 1, 0., g[0][width - 1]);
GtsVertex * v4 = gts_vertex_new (s->vertex_class,
width - 1, height - 1,
g[height - 1][width - 1]);
guint i, j;
GSList * corners = NULL;
GtsTriangle * t;
GtsVertex * w1, * w2, * w3;
GtsListFace * f;
/* creates enclosing triangle */
corners = g_slist_prepend (corners, v1);
corners = g_slist_prepend (corners, v2);
corners = g_slist_prepend (corners, v3);
corners = g_slist_prepend (corners, v4);
t = gts_triangle_enclosing (gts_triangle_class (), corners, 100.);
g_slist_free (corners);
gts_triangle_vertices (t, &w1, &w2, &w3);
f = GTS_LIST_FACE (gts_face_new (s->face_class, t->e1, t->e2, t->e3));
gts_surface_add_face (s, GTS_FACE (f));
/* add PGM vertices (corners excepted) to point list of f */
for (i = 1; i < width - 1; i++) {
for (j = 1; j < height - 1; j++)
prepend (f, g, i, j);
prepend (f, g, i, 0);
prepend (f, g, i, height - 1);
}
for (j = 1; j < height - 1; j++) {
prepend (f, g, 0, j);
prepend (f, g, width - 1, j);
}
pgm_freearray (g, height);
/* add four corners to initial triangulation */
g_assert (gts_delaunay_add_vertex_to_face (s, v1, GTS_FACE (f)) == NULL);
f = GTS_LIST_FACE (gts_point_locate (GTS_POINT (v2), s, NULL));
g_assert (gts_delaunay_add_vertex_to_face (s, v2, GTS_FACE (f)) == NULL);
f = GTS_LIST_FACE (gts_point_locate (GTS_POINT (v3), s, NULL));
g_assert (gts_delaunay_add_vertex_to_face (s, v3, GTS_FACE (f)) == NULL);
f = GTS_LIST_FACE (gts_point_locate (GTS_POINT (v4), s, NULL));
g_assert (gts_delaunay_add_vertex_to_face (s, v4, GTS_FACE (f)) == NULL);
/* refine surface */
surface_hf_refine (s, cost_func, cost_data, stop_func, stop_data);
/* destroy unused vertices */
gts_surface_foreach_face (s, (GtsFunc) destroy_unused, NULL);
/* destroy enclosing triangle */
gts_allow_floating_vertices = TRUE;
gts_object_destroy (GTS_OBJECT (w1));
gts_object_destroy (GTS_OBJECT (w2));
gts_object_destroy (GTS_OBJECT (w3));
gts_allow_floating_vertices = FALSE;
return s;
}
int main (int argc, char * argv[])
{
GPtrArray * vertices;
GtsFifo * edges;
guint i, line;
GtsTriangle * t;
GtsVertex * v1, * v2, * v3;
GtsSurface * surface;
gboolean keep_hull = TRUE;
gboolean verbose = FALSE;
gboolean add_constraints = TRUE;
gboolean remove_holes = FALSE;
gboolean check_delaunay = FALSE;
gboolean conform = FALSE;
gboolean refine = FALSE;
gboolean split_constraints = FALSE;
gboolean randomize = FALSE;
gboolean remove_duplicates = FALSE;
gint steiner_max = -1;
gdouble quality = 0., area = G_MAXDOUBLE;
int c = 0, status = 0;
const char * fname = NULL;
GTimer * timer;
/* parse options using getopt */
while (c != EOF) {
#ifdef HAVE_GETOPT_LONG
static struct option long_options[] = {
{"duplicates", no_argument, NULL, 'd'},
{"help", no_argument, NULL, 'h'},
{"verbose", no_argument, NULL, 'v'},
{"randomize", no_argument, NULL, 'r'},
{"hull", no_argument, NULL, 'b'},
{"noconst", no_argument, NULL, 'e'},
{"holes", no_argument, NULL, 'H'},
{"split", no_argument, NULL, 'S'},
{"check", no_argument, NULL, 'c'},
{"files", required_argument, NULL, 'f'},
{"conform", no_argument, NULL, 'o'},
{"steiner", required_argument, NULL, 's'},
{"quality", required_argument, NULL, 'q'},
{"area", required_argument, NULL, 'a'}
};
int option_index = 0;
switch ((c = getopt_long (argc, argv, "hvbecf:os:q:a:HSrd",
long_options, &option_index))) {
#else /* not HAVE_GETOPT_LONG */
switch ((c = getopt (argc, argv, "hvbecf:os:q:a:HSrd"))) {
#endif /* not HAVE_GETOPT_LONG */
case 'd': /* duplicates */
remove_duplicates = TRUE;
break;
case 'b': /* do not keep convex hull */
keep_hull = FALSE;
break;
case 'e': /* do not add constrained edges */
add_constraints = FALSE;
break;
case 'H': /* remove holes */
remove_holes = TRUE;
break;
case 'S': /* split constraints */
split_constraints = TRUE;
break;
case 'r': /* randomize */
randomize = TRUE;
break;
case 'c': /* check Delaunay property */
check_delaunay = TRUE;
break;
case 'f': /* generates files */
fname = optarg;
break;
case 'v': /* verbose */
verbose = TRUE;
break;
case 'o': /* conform */
conform = TRUE;
break;
case 's': /* steiner */
steiner_max = atoi (optarg);
break;
case 'q': /* quality */
conform = TRUE;
refine = TRUE;
quality = atof (optarg);
break;
case 'a': /* area */
conform = TRUE;
refine = TRUE;
area = atof (optarg);
break;
case 'h': /* help */
fprintf (stderr,
"Usage: delaunay [OPTION] < file.gts\n"
"Construct the constrained Delaunay triangulation of the input\n"
"\n"
" -b --hull do not keep convex hull\n"
" -e --noconst do not add constrained edges\n"
" -S --split split constraints (experimental)\n"
" -H --holes remove holes from the triangulation\n"
" -d --duplicates remove duplicate vertices\n"
" -r --randomize shuffle input vertex list\n"
" -c --check check Delaunay property\n"
" -f FNAME --files=FNAME generate evolution files\n"
" -o --conform generate conforming triangulation\n"
" -s N --steiner=N maximum number of Steiner points for\n"
" conforming triangulation (default is no limit)\n"
" -q Q --quality=Q Set the minimum acceptable face quality\n"
" -a A --area=A Set the maximum acceptable face area\n"
" -v --verbose print statistics about the triangulation\n"
" -h --help display this help and exit\n"
"\n"
"Reports bugs to %s\n",
GTS_MAINTAINER);
return 0; /* success */
break;
case '?': /* wrong options */
fprintf (stderr, "Try `delaunay --help' for more information.\n");
return 1; /* failure */
}
}
/* read file => two lists: vertices and constraints */
edges = gts_fifo_new ();
vertices = g_ptr_array_new ();
if (add_constraints) /* the edge class is a GtsConstraintClass */
line = read_list (vertices, edges,
GTS_EDGE_CLASS (gts_constraint_class ()),
stdin);
else /* the edge class is a "normal" edge: GtsEdgeClass */
line = read_list (vertices, edges,
gts_edge_class (),
stdin);
if (line > 0) {
fprintf (stderr, "delaunay: error in input file at line %u\n", line);
return 1;
}
timer = g_timer_new ();
g_timer_start (timer);
if (randomize)
shuffle_array (vertices);
/* create triangle enclosing all the vertices */
{
GSList * list = NULL;
for (i = 0; i < vertices->len; i++)
list = g_slist_prepend (list, g_ptr_array_index (vertices, i));
t = gts_triangle_enclosing (gts_triangle_class (), list, 100.);
g_slist_free (list);
}
gts_triangle_vertices (t, &v1, &v2, &v3);
/* create surface with one face: the enclosing triangle */
surface = gts_surface_new (gts_surface_class (),
gts_face_class (),
gts_edge_class (),
gts_vertex_class ());
gts_surface_add_face (surface, gts_face_new (gts_face_class (),
t->e1, t->e2, t->e3));
/* add vertices */
for (i = 0; i < vertices->len; i++) {
GtsVertex * v1 = g_ptr_array_index (vertices, i);
GtsVertex * v = gts_delaunay_add_vertex (surface, v1, NULL);
g_assert (v != v1);
if (v != NULL) {
if (!remove_duplicates) {
fprintf (stderr, "delaunay: duplicate vertex (%g,%g) in input file\n",
GTS_POINT (v)->x, GTS_POINT (v)->y);
return 1; /* Failure */
}
else
gts_vertex_replace (v1, v);
}
if (fname) {
static guint nf = 1;
char s[80];
FILE * fp;
g_snprintf (s, 80, "%s.%u", fname, nf++);
fp = fopen (s, "wt");
gts_surface_write_oogl (surface, fp);
fclose (fp);
if (check_delaunay && gts_delaunay_check (surface)) {
fprintf (stderr, "delaunay: triangulation is not Delaunay\n");
return 1;
}
}
}
g_ptr_array_free (vertices, TRUE);
/* add remaining constraints */
if (add_constraints)
gts_fifo_foreach (edges, (GtsFunc) add_constraint, surface);
/* destroy enclosing triangle */
gts_allow_floating_vertices = TRUE;
gts_object_destroy (GTS_OBJECT (v1));
gts_object_destroy (GTS_OBJECT (v2));
gts_object_destroy (GTS_OBJECT (v3));
gts_allow_floating_vertices = FALSE;
if (!keep_hull)
gts_delaunay_remove_hull (surface);
if (remove_holes)
delaunay_remove_holes (surface);
if (split_constraints) {
gpointer data[2];
data[0] = surface;
data[1] = edges;
gts_fifo_foreach (edges, (GtsFunc) split_constraint, data);
}
if (conform) {
guint encroached_number =
gts_delaunay_conform (surface,
steiner_max,
(GtsEncroachFunc) gts_vertex_encroaches_edge,
NULL);
if (encroached_number == 0 && refine) {
guint unrefined_number;
gpointer data[2];
data[0] = &quality;
data[1] = &area;
unrefined_number =
gts_delaunay_refine (surface,
steiner_max,
(GtsEncroachFunc) gts_vertex_encroaches_edge,
NULL,
(GtsKeyFunc) triangle_cost,
data);
if (verbose && unrefined_number > 0)
fprintf (stderr,
"delaunay: ran out of Steiner points (max: %d) during refinement\n"
"%d unrefined faces left\n",
steiner_max, unrefined_number);
}
else if (verbose && encroached_number > 0)
fprintf (stderr,
"delaunay: ran out of Steiner points (max: %d) during conforming\n"
"Delaunay triangulation: %d encroached constraints left\n",
steiner_max, encroached_number);
}
g_timer_stop (timer);
if (verbose) {
gts_surface_print_stats (surface, stderr);
fprintf (stderr, "# Triangulation time: %g s speed: %.0f vertex/s\n",
g_timer_elapsed (timer, NULL),
gts_surface_vertex_number (surface)/g_timer_elapsed (timer, NULL));
}
if (check_delaunay && gts_delaunay_check (surface)) {
fprintf (stderr, "delaunay: triangulation is not Delaunay\n");
status = 1; /* failure */
}
/* write triangulation */
gts_surface_write (surface, stdout);
return status;
}
/* This function is modified from the original in GTS in order to avoid
* deallocating any objects referenced by the live-objects table. The
* approach is similar to what is used for replace() in vertex.c.
*/
GList*
pygts_vertices_merge(GList* vertices, gdouble epsilon,
gboolean (* check) (GtsVertex *, GtsVertex *))
{
GPtrArray *array;
GList *i, *next;
GNode *kdtree;
GtsVertex *v;
GtsBBox *bbox;
GSList *selected, *j;
GtsVertex *sv;
PygtsObject *obj;
PygtsVertex *vertex=NULL;
GSList *parents=NULL, *ii,*cur;
g_return_val_if_fail(vertices != NULL, 0);
array = g_ptr_array_new();
i = vertices;
while (i) {
g_ptr_array_add(array, i->data);
i = g_list_next(i);
}
kdtree = gts_kdtree_new(array, NULL);
g_ptr_array_free(array, TRUE);
i = vertices;
while(i) {
v = (GtsVertex*)i->data;
if (!GTS_OBJECT(v)->reserved) { /* Do something only if v is active */
/* build bounding box */
bbox = gts_bbox_new(gts_bbox_class(), v,
GTS_POINT(v)->x - epsilon,
GTS_POINT(v)->y - epsilon,
GTS_POINT(v)->z - epsilon,
GTS_POINT(v)->x + epsilon,
GTS_POINT(v)->y + epsilon,
GTS_POINT(v)->z + epsilon);
/* select vertices which are inside bbox using kdtree */
j = selected = gts_kdtree_range(kdtree, bbox, NULL);
while(j) {
sv = (GtsVertex*)j->data;
if( sv!=v && !GTS_OBJECT(sv)->reserved && (!check||(*check)(sv, v)) ) {
/* sv is not v and is active */
if( (obj = (PygtsObject*)g_hash_table_lookup(obj_table,GTS_OBJECT(sv))) !=NULL ) {
vertex = PYGTS_VERTEX(obj);
/* Detach and save any parent segments */
ii = sv->segments;
while(ii!=NULL) {
cur = ii;
ii = g_slist_next(ii);
if(PYGTS_IS_PARENT_SEGMENT(cur->data)) {
sv->segments = g_slist_remove_link(sv->segments, cur);
parents = g_slist_prepend(parents,cur->data);
g_slist_free_1(cur);
}
}
}
gts_vertex_replace(sv, v);
GTS_OBJECT(sv)->reserved = sv; /* mark sv as inactive */
/* Reattach the parent segments */
if( vertex != NULL ) {
ii = parents;
while(ii!=NULL) {
sv->segments = g_slist_prepend(sv->segments, ii->data);
ii = g_slist_next(ii);
}
g_slist_free(parents);
parents = NULL;
}
vertex = NULL;
}
j = g_slist_next(j);
}
g_slist_free(selected);
gts_object_destroy(GTS_OBJECT(bbox));
}
i = g_list_next(i);
}
gts_kdtree_destroy(kdtree);
/* destroy inactive vertices and removes them from list */
/* we want to control vertex destruction */
gts_allow_floating_vertices = TRUE;
i = vertices;
while (i) {
v = (GtsVertex*)i->data;
next = g_list_next(i);
if(GTS_OBJECT(v)->reserved) { /* v is inactive */
if( g_hash_table_lookup(obj_table,GTS_OBJECT(v))==NULL ) {
gts_object_destroy(GTS_OBJECT(v));
}
else {
GTS_OBJECT(v)->reserved = 0;
}
vertices = g_list_remove_link(vertices, i);
g_list_free_1(i);
}
i = next;
}
gts_allow_floating_vertices = FALSE;
return vertices;
}
int main (int argc, char * argv[])
{
guint i, j, nx, ny;
gdouble cosa, sina;
GtsSurface * surface;
GSList * l, * vertices = NULL;
GtsTriangle * t;
GtsVertex * v1, * v2, * v3;
GTimer * timer;
if (argc != 4) {
fprintf (stderr, "usage: cartesian nx ny angle\n");
return 0;
}
nx = strtol (argv[1], NULL, 0);
ny = strtol (argv[2], NULL, 0);
cosa = cos (strtod (argv[3], NULL));
sina = sin (strtod (argv[3], NULL));
timer = g_timer_new ();
g_timer_start (timer);
for (i = 0; i < nx; i++) {
gdouble x = (gdouble) i/(gdouble) (nx - 1);
for (j = 0; j < ny; j++) {
gdouble y = (gdouble) j/(gdouble) (nx - 1);
vertices = g_slist_prepend (vertices,
gts_vertex_new (gts_vertex_class (),
cosa*x - sina*y, sina*x + cosa*y, 0.));
}
}
t = gts_triangle_enclosing (gts_triangle_class (), vertices, 100.);
gts_triangle_vertices (t, &v1, &v2, &v3);
surface = gts_surface_new (gts_surface_class (),
gts_face_class (),
gts_edge_class (),
gts_vertex_class ());
gts_surface_add_face (surface, gts_face_new (gts_face_class (),
t->e1, t->e2, t->e3));
g_timer_stop (timer);
fprintf (stderr, "Input: %g s\n", g_timer_elapsed (timer, NULL));
g_timer_reset (timer);
g_timer_start (timer);
l = vertices;
while (l) {
g_assert (gts_delaunay_add_vertex (surface, l->data, NULL) == NULL);
l = l->next;
}
gts_allow_floating_vertices = TRUE;
gts_object_destroy (GTS_OBJECT (v1));
gts_object_destroy (GTS_OBJECT (v2));
gts_object_destroy (GTS_OBJECT (v3));
gts_allow_floating_vertices = FALSE;
g_timer_stop (timer);
fprintf (stderr, "Triangulation: %g s speed: %.0f vertex/s\n",
g_timer_elapsed (timer, NULL),
g_slist_length (vertices)/g_timer_elapsed (timer, NULL));
g_timer_reset (timer);
g_timer_start (timer);
gts_surface_write (surface, stdout);
g_timer_stop (timer);
fprintf (stderr, "Output: %g s\n", g_timer_elapsed (timer, NULL));
if (gts_delaunay_check (surface)) {
fprintf (stderr, "WARNING: surface is not Delaunay\n");
return 0;
}
return 1;
}
