static union tree *
process_boolean(union tree *curtree, struct db_tree_state *tsp, const struct db_full_path *pathp)
{
union tree *ret_tree = TREE_NULL;
/* Begin bomb protection */
if (!BU_SETJUMP) {
/* try */
(void)nmg_model_fuse(*tsp->ts_m, tsp->ts_tol);
ret_tree = nmg_booltree_evaluate(curtree, tsp->ts_tol, &rt_uniresource);
} else {
/* catch */
char *name = db_path_to_string(pathp);
/* Error, bail out */
bu_log("conversion of %s FAILED!\n", name);
/* Sometimes the NMG library adds debugging bits when
* it detects an internal error, before before bombing out.
*/
RTG.NMG_debug = NMG_debug;/* restore mode */
/* Release any intersector 2d tables */
nmg_isect2d_final_cleanup();
/* Release the tree memory & input regions */
db_free_tree(curtree, &rt_uniresource);/* Does an nmg_kr() */
/* Get rid of (m)any other intermediate structures */
if ((*tsp->ts_m)->magic == NMG_MODEL_MAGIC) {
nmg_km(*tsp->ts_m);
} else {
bu_log("WARNING: tsp->ts_m pointer corrupted, ignoring it.\n");
}
bu_free(name, "db_path_to_string");
/* Now, make a new, clean model structure for next pass. */
*tsp->ts_m = nmg_mm();
} BU_UNSETJUMP;/* Relinquish the protection */
return ret_tree;
}
static union tree *
process_boolean(struct db_tree_state *tsp, union tree *curtree, const struct db_full_path *pathp)
{
union tree *result = NULL;
/* Begin bomb protection */
if (!BU_SETJUMP) {
/* try */
(void)nmg_model_fuse(*tsp->ts_m, tsp->ts_tol);
result = nmg_booltree_evaluate(curtree, tsp->ts_tol, &rt_uniresource);
} else {
/* catch */
char *sofar;
/* Error, bail out */
sofar = db_path_to_string(pathp);
bu_log("FAILED: Cannot convert %s!\n", sofar);
bu_free(sofar, "path string");
/* Sometimes the NMG library adds debugging bits when
* it detects an internal error, before bombing out.
*/
RTG.NMG_debug = NMG_debug; /* restore mode */
/* Release the tree memory & input regions */
db_free_tree(curtree, &rt_uniresource); /* Does an nmg_kr() */
/* Get rid of (m)any other intermediate structures */
if ((*tsp->ts_m)->magic == NMG_MODEL_MAGIC)
nmg_km(*tsp->ts_m);
/* Now, make a new, clean model structure for next pass. */
*tsp->ts_m = nmg_mm();
} BU_UNSETJUMP; /* Relinquish the protection */
return result;
}
/*
* D O _ R E G I O N _ E N D
*
* Called from db_walk_tree().
*
* This routine must be prepared to run in parallel.
*/
union tree *do_region_end(register struct db_tree_state *tsp, struct db_full_path *pathp, union tree *curtree, genptr_t client_data)
{
union tree *ret_tree;
struct nmgregion *r;
struct bu_list vhead;
RT_CK_TESS_TOL(tsp->ts_ttol);
BN_CK_TOL(tsp->ts_tol);
NMG_CK_MODEL(*tsp->ts_m);
BU_LIST_INIT(&vhead);
if (RT_G_DEBUG&DEBUG_TREEWALK || verbose) {
char *sofar = db_path_to_string(pathp);
bu_log("\ndo_region_end(%d %d%%) %s\n",
regions_tried,
regions_tried>0 ? (regions_done * 100) / regions_tried : 0,
sofar);
bu_free(sofar, "path string");
}
if (curtree->tr_op == OP_NOP)
return curtree;
regions_tried++;
/* Begin bomb protection */
if ( ncpu == 1 ) {
if ( BU_SETJUMP ) {
/* Error, bail out */
BU_UNSETJUMP; /* Relinquish the protection */
/* Sometimes the NMG library adds debugging bits when
* it detects an internal error, before bombing out.
*/
rt_g.NMG_debug = NMG_debug; /* restore mode */
/* Release the tree memory & input regions */
db_free_tree(curtree, &rt_uniresource); /* Does an nmg_kr() */
/* Get rid of (m)any other intermediate structures */
if ( (*tsp->ts_m)->magic != -1L )
nmg_km(*tsp->ts_m);
/* Now, make a new, clean model structure for next pass. */
*tsp->ts_m = nmg_mm();
goto out;
}
}
(void)nmg_model_fuse(*tsp->ts_m, tsp->ts_tol);
ret_tree = nmg_booltree_evaluate(curtree, tsp->ts_tol, &rt_uniresource); /* librt/nmg_bool.c */
BU_UNSETJUMP; /* Relinquish the protection */
if ( ret_tree )
r = ret_tree->tr_d.td_r;
else
r = (struct nmgregion *)NULL;
regions_done++;
if (r != 0) {
FILE *fp_psurf;
int i;
struct bu_vls file_base;
struct bu_vls file;
bu_vls_init(&file_base);
bu_vls_init(&file);
bu_vls_strcpy(&file_base, prefix);
bu_vls_strcat(&file_base, DB_FULL_PATH_CUR_DIR(pathp)->d_namep);
/* Dots confuse Jack's Peabody language. Change to '_'. */
for (i = 0; i < file_base.vls_len; i++)
if (file_base.vls_str[i] == '.')
file_base.vls_str[i] = '_';
/* Write color attribute to .fig figure file. */
if (tsp->ts_mater.ma_color_valid != 0) {
fprintf(fp_fig, "\tattribute %s {\n",
bu_vls_addr(&file_base));
fprintf(fp_fig, "\t\trgb = (%f, %f, %f);\n",
V3ARGS(tsp->ts_mater.ma_color));
fprintf(fp_fig, "\t\tambient = 0.18;\n");
fprintf(fp_fig, "\t\tdiffuse = 0.72;\n");
fprintf(fp_fig, "\t}\n");
}
/* Write segment attributes to .fig figure file. */
fprintf(fp_fig, "\tsegment %s_seg {\n", bu_vls_addr(&file_base));
fprintf(fp_fig, "\t\tpsurf=\"%s.pss\";\n", bu_vls_addr(&file_base));
if (tsp->ts_mater.ma_color_valid != 0)
fprintf(fp_fig,
"\t\tattribute=%s;\n", bu_vls_addr(&file_base));
fprintf(fp_fig, "\t\tsite base->location=trans(0, 0, 0);\n");
fprintf(fp_fig, "\t}\n");
if ( bu_vls_strlen(&base_seg) <= 0 ) {
bu_vls_vlscat( &base_seg, &file_base );
} else {
fprintf(fp_fig, "\tjoint %s_jt {\n",
bu_vls_addr(&file_base));
fprintf(fp_fig,
"\t\tconnect %s_seg.base to %s_seg.base;\n",
bu_vls_addr(&file_base),
bu_vls_addr(&base_seg) );
fprintf(fp_fig, "\t}\n");
}
bu_vls_vlscat(&file, &file_base);
bu_vls_strcat(&file, ".pss"); /* Required Jack suffix. */
/* Write psurf to .pss file. */
if ((fp_psurf = fopen(bu_vls_addr(&file), "wb")) == NULL)
perror(bu_vls_addr(&file));
else {
nmg_to_psurf(r, fp_psurf);
fclose(fp_psurf);
if (verbose) bu_log("*** Wrote %s\n", bu_vls_addr(&file));
}
bu_vls_free(&file);
/* Also write as UNIX-plot file, if desired */
if ( debug_plots ) {
FILE *fp;
bu_vls_vlscat(&file, &file_base);
bu_vls_strcat(&file, ".pl");
if ((fp = fopen(bu_vls_addr(&file), "wb")) == NULL)
perror(bu_vls_addr(&file));
else {
struct bu_list vhead;
pl_color( fp,
(int)(tsp->ts_mater.ma_color[0] * 255),
(int)(tsp->ts_mater.ma_color[1] * 255),
(int)(tsp->ts_mater.ma_color[2] * 255) );
/* nmg_pl_r( fp, r ); */
BU_LIST_INIT( &vhead );
nmg_r_to_vlist( &vhead, r, 0 );
rt_vlist_to_uplot( fp, &vhead );
fclose(fp);
if (verbose) bu_log("*** Wrote %s\n", bu_vls_addr(&file));
}
bu_vls_free(&file);
}
/* NMG region is no longer necessary */
nmg_kr(r);
}
/*
* Dispose of original tree, so that all associated dynamic
* memory is released now, not at the end of all regions.
* A return of TREE_NULL from this routine signals an error,
* so we need to cons up an OP_NOP node to return.
*/
db_free_tree(curtree, &rt_uniresource); /* Does an nmg_kr() */
out:
BU_GETUNION(curtree, tree);
curtree->magic = RT_TREE_MAGIC;
curtree->tr_op = OP_NOP;
return(curtree);
}
int
main(int argc, char **argv) /* really has no arguments */
{
struct nmgregion *r;
char * id_name = "BRL-CAD t-NURBS NMG Example";
char * tea_name = "UtahTeapot";
char * uplot_name = "teapot.pl";
struct bu_list vhead;
FILE *fp;
int i;
tol.magic = BN_TOL_MAGIC;
tol.dist = 0.005;
tol.dist_sq = tol.dist * tol.dist;
tol.perp = 1e-6;
tol.para = 1 - tol.perp;
BU_LIST_INIT( &rt_g.rtg_vlfree );
outfp = wdb_fopen( "tea_nmg.g" );
rt_g.debug |= DEBUG_ALLRAYS; /* Cause core dumps on bu_bomb(), but no extra messages */
while ((i=bu_getopt(argc, argv, "d")) != EOF) {
switch (i) {
case 'd' :
rt_g.debug |= DEBUG_MEM | DEBUG_MEM_FULL;
break;
default :
(void)fprintf(stderr,
"Usage: %s [-d] > database.g\n", *argv);
return(-1);
}
}
mk_id( outfp, id_name);
m = nmg_mm();
NMG_CK_MODEL( m );
r = nmg_mrsv( m );
NMG_CK_REGION( r );
s = BU_LIST_FIRST( shell, &r->s_hd );
NMG_CK_SHELL( s );
/* Step through each patch and create a NMG TNURB face
* representing the patch then dump them out.
*/
for ( i = 0; i < PATCH_COUNT; i++)
{
dump_patch( patches[i] );
}
/* Connect up the coincident vertexuses and edges */
(void)nmg_model_fuse( m, &tol );
/* write NMG to output file */
(void)mk_nmg( outfp, tea_name, m );
wdb_close(outfp);
/* Make a vlist drawing of the model */
BU_LIST_INIT( &vhead );
nmg_m_to_vlist( &vhead, m, 0 );
/* Make a UNIX plot file from this vlist */
if ( (fp=fopen( uplot_name, "w" )) == NULL )
{
bu_log( "Cannot open plot file: %s\n", uplot_name );
perror( "teapot_nmg" );
}
else
rt_vlist_to_uplot( fp, &vhead );
return(0);
}
/**
* R T _ M E T A B A L L _ T E S S
*
* Tessellate a metaball.
*/
int
rt_metaball_tess(struct nmgregion **r, struct model *m, struct rt_db_internal *ip, const struct rt_tess_tol *ttol, const struct bn_tol *tol)
{
struct rt_metaball_internal *mb;
fastf_t mtol, radius;
point_t center, min, max;
fastf_t i, j, k, finalstep = +INFINITY;
struct bu_vls times = BU_VLS_INIT_ZERO;
struct wdb_metaballpt *mbpt;
struct shell *s;
int numtri = 0;
if (r == NULL || m == NULL)
return -1;
*r = NULL;
NMG_CK_MODEL(m);
RT_CK_DB_INTERNAL(ip);
mb = (struct rt_metaball_internal *)ip->idb_ptr;
RT_METABALL_CK_MAGIC(mb);
rt_prep_timer();
/* since this geometry isn't necessarily prepped, we have to figure out the
* finalstep and bounding box manually. */
for (BU_LIST_FOR(mbpt, wdb_metaballpt, &mb->metaball_ctrl_head))
V_MIN(finalstep, mbpt->fldstr);
finalstep /= (fastf_t)1e5;
radius = rt_metaball_get_bounding_sphere(¢er, mb->threshold, mb);
if(radius < 0) { /* no control points */
bu_log("Attempting to tesselate metaball with no control points");
return -1;
}
rt_metaball_bbox(ip, &min, &max, tol);
/* TODO: get better sampling tolerance, unless this is "good enough" */
mtol = ttol->abs;
V_MAX(mtol, ttol->rel * radius * 10);
V_MAX(mtol, tol->dist);
*r = nmg_mrsv(m); /* new empty nmg */
s = BU_LIST_FIRST(shell, &(*r)->s_hd);
/* the incredibly naïve approach. Time could be cut in half by simply
* caching 4 point values, more by actually marching or doing active
* refinement. This is the simplest pattern for now.
*/
for (i = min[X]; i < max[X]; i += mtol)
for (j = min[Y]; j < max[Y]; j += mtol)
for (k = min[Z]; k < max[Z]; k += mtol) {
point_t p[8];
int pv = 0;
/* generate the vertex values */
#define MEH(c,di,dj,dk) VSET(p[c], i+di, j+dj, k+dk); pv |= rt_metaball_point_inside((const point_t *)&p[c], mb) << c;
MEH(0, 0, 0, mtol);
MEH(1, mtol, 0, mtol);
MEH(2, mtol, 0, 0);
MEH(3, 0, 0, 0);
MEH(4, 0, mtol, mtol);
MEH(5, mtol, mtol, mtol);
MEH(6, mtol, mtol, 0);
MEH(7, 0, mtol, 0);
#undef MEH
if ( pv != 0 && pv != 255 ) { /* entire cube is either inside or outside */
point_t edges[12];
int rval;
/* compute the edge values (if needed) */
#define MEH(a,b,c) if(!(pv&(1<<b)&&pv&(1<<c))) { \
rt_metaball_find_intersection(edges+a, mb, (const point_t *)(p+b), (const point_t *)(p+c), mtol, finalstep); \
}
/* magic numbers! an edge, then the two attached vertices.
* For edge/vertex mapping, refer to the awesome ascii art
* at the beginning of this file. */
MEH(0 ,0,1);
MEH(1 ,1,2);
MEH(2 ,2,3);
MEH(3 ,0,3);
MEH(4 ,4,5);
MEH(5 ,5,6);
MEH(6 ,6,7);
MEH(7 ,4,7);
MEH(8 ,0,4);
MEH(9 ,1,5);
MEH(10,2,6);
MEH(11,3,7);
#undef MEH
rval = nmg_mc_realize_cube(s, pv, (point_t *)edges, tol);
numtri += rval;
if(rval < 0) {
bu_log("Error attempting to realize a cube O.o\n");
return rval;
}
}
}
nmg_mark_edges_real(&s->l.magic);
nmg_region_a(*r, tol);
nmg_model_fuse(m, tol);
rt_get_timer(×, NULL);
bu_log("metaball tesselate (%d triangles): %s\n", numtri, bu_vls_addr(×));
return 0;
}
