【转帖】hanging in evalpoin
 

hanging in evalpoint
hanging in evalpoint
hello all,
i have a drawing that when it gets to evaluating points of a spline, it just hangs, and the debugger cannot break, vs6 classifies it as a possible dead lock??
the code to replicate it is as follows, and i have also attached the drawing for you as well.
void explodeblock(oddbentityptr entityptr) {
oddbblockreferenceptr blockrefptr = entityptr;
oddbobjectid blockobjectid = blockrefptr->blocktablerecord();
oddbblocktablerecordptr recordptr = blockobjectid.safeopenobject();
oddbobjectiteratorptr entityiteratorptr = recordptr->newiterator();
try {
while( !entityiteratorptr->done() ) {
oddbentityptr subentityptr = entityiteratorptr->entity(oddb::kforread);
oddbobjectid subentityid = subentityptr->objectid();
oddbhandle hsubentity = subentityid.gethandle();
oddbobjectptr objectptr = subentityid.openobject();
if (objectptr->isa() == oddbregion::desc()) {
oddbregionptr regionptr = subentityptr;
odrxobjectptrarray primitives;
regionptr->explode(primitives);
} else if(objectptr->isa() == oddbellipse::desc()) {
oddbellipseptr ellipseptr = subentityptr;
odgepoint3d cpnt;
cpnt = ellipseptr->center();
odgevector3d vec = ellipseptr->normal();
odgepoint3d pnt;
ellipseptr->getstartpoint(pnt);
ellipseptr->getendpoint(pnt);
} else if (objectptr->isa() == oddbspline::desc()) {
oddbsplineptr splineptr = subentityptr;
int degree;
bool rational;
bool closed;
bool periodic;
odgepoint3darray controlpoints;
odgedoublearray knots;
odgedoublearray weights;
double controlpttol;
double knottol;
splineptr->getnurbsdata(degree, rational, closed, periodic, controlpoints, knots, weights, controlpttol, knottol);
odgenurbcurve3d gespline(degree, knots, controlpoints, weights, periodic);
double sp = gespline.startparam();
double ep = gespline.endparam();
double cp = sp;
while( cp < ep ) {
odgepoint3d epnt = gespline.evalpoint(cp);
cp += fabs((sp-ep)/400);
}
} else if (objectptr->iskindof(oddbblockreference::desc())) {
//std::string shandle = std::string(hentity.ascii().c_str());
explodeblock(subentityptr);
} else {
odrxobjectptrarray primitives;
subentityptr->explode(primitives);
}
entityiteratorptr->step();
}
} catch (oderror& e) {
std::cout << dwgsvcs.geterrordescription(e.code()).c_str() << std::endl ;
}
}
oddbdatabaseptr dwgdb;
void doload() {
odrx_init_static_module_map();
{
dwgdb = dwgsvcs.readfile( "p:\\drawings\\rawlinsons\\ianfeek\\pac\\a-pac-02 mezzanine floor.dwg", true, false, oda::ksharedenyno );
// line type iteration
oddblinetypetableptr linetableptr = dwgdb->getlinetypetableid().safeopenobject();
oddblinetypetableiteratorptr linetableiteratorptr = linetableptr->newiterator();
while( !linetableiteratorptr->done() ) {
linetableiteratorptr->step();
}
oddbblocktablerecordptr blocktableptr = dwgdb->getmodelspaceid().safeopenobject();
oddbobjectiteratorptr entityiteratorptr = blocktableptr->newiterator();
while( !entityiteratorptr->done() ) {
oddbentityptr entityptr = entityiteratorptr->entity(oddb::kforread);
oddbobjectid entityid = entityptr->objectid();
oddbhandle hentity = entityid.gethandle();
oddbobjectptr objectptr = entityid.openobject();
odgeextents3d extents;
try {
if ( entityptr->getgeomextents(extents) == eok ) {
// bad extents not found
// ....
}
} catch (oderror& e) {
std::cout << "bad extents with oderror" << std::endl;
} catch ( ... ) {
std::cout << "bad extents" << std::endl;
}
if ( entityptr->iskindof(oddbdimension::desc())) {
oddbdimensionptr dimptr = entityptr;
std::string shandle = std::string(hentity.ascii().c_str());
try {
dimptr->upgradeopen();
double dtest = dimptr->measurement();
} catch( oderror &e ) {
//delete pdim;
//return null;
}
if( shandle == "720cb") {
unsigned int uinodimensions = 0;
odrxobjectptrarray primitives;
dimptr->explode(primitives);
odrxobjectptrarray::iterator iter = primitives.begin();
while( iter != primitives.end()) {
uinodimensions++;
oddbentityptr priment = *iter;
if (priment->isa() == oddbtext::desc()) {
std::cout << "dimensiontext entity found" << std::endl;
} else if (priment->isa() == oddbmtext::desc()) {
std::cout << "dimensionmtext entity found" << std::endl;
}
odrxobjectptrarray subprims;
priment->explode(subprims);
iter++;
}
printf("no dimension entities %d\n", uinodimensions);
} else {
odrxobjectptrarray primitives;
dimptr->explode(primitives);
odrxobjectptrarray::iterator iter = primitives.begin();
while( iter != primitives.end()) {
oddbentityptr priment = *iter;
odrxobjectptrarray subprims;
priment->explode(subprims);
iter++;
}
}
} else {
odrxobjectptrarray primitives;
entityptr->explode(primitives);
}
if (objectptr->iskindof(oddbblockreference::desc())) {
explodeblock(entityptr);
}
entityiteratorptr->step();
}
}
}
please be aware that this from a test (opendwg) issues program that i use to find issues i have, so i have left some of the extra code that i usually use.
please let me know if you have any issues replicating, or is there anything else i can help with.
cheers
jason
attached files

dear jason,
this piece of code works fine for me. it operates quite slow, but it doesn't hang computer. please make sure that you're using at least dd 1.13. dd 1.12 contained not very optimal implementation for some spline stuff.
sincerely yours,
george udov