【转帖】请教各位,图中的块参照如何遍历?
 

请教各位,图中的块参照如何遍历?
请教各位,图中的块参照如何遍历?
我现在要取图层上的所有块参照的块名,使用选择集没做出来,程序如下
rb.restype =2;
char sbuf[16];
strcpy(sbuf,"blockreference");
rb.resval.rstring = sbuf;
rb.rbnext = null;
ads_name ss;
acedssget("x",null,null,&rb,ss);
不知道失败的原因,只好采用遍历的方法,看到前面有帖子有遍历块表里的块名的方法,采用之,发现没办法用取到的块表块名来取块参照的块名,苦思两天了,不知道是为什么,请大家不吝赐教!!谢谢了!!
ptable->getat(sablockname.getat(i),id);
//acdbentity *pent;
acdbobject *pobj;
acad::errorstatus es;
es = acdbopenacdbobject(pobj,id,acdb::kforread);
//es = acdbopenobject(pent,id,acdb::kforread);(使用时出错es ==enotanentity,因此采用acdbopenacdbobject)
//acrxobject ent = pent->acrxobject;
acdbblockreference *pblkref=new acdbblockreference;//= (acdbblockreference*)pobj

if(pblkref->iskindof(acdbblockreference::desc()))
{
pblkref= acdbblockreference::cast(pobj);(!!!!!!!出错地点:pblkref的返回值为0)
}

acdbobjectid pblktblrecid;
//pblktblrecid = pblkref->blocktablerecord();
pblktblrecid = pblkref->objectid();
acdbblocktablerecord *pblockdef;
acdbopenobject(pblockdef, blockid, acdb::kforread);
acdbblocktablerecorditerator *piterator;
pblockdef->newiterator(piterator);
acgepoint3d basepoint;
acdbentity *pent;
acdbattributedefinition *pattdef;
for (piterator->start(); !piterator->done();
piterator->step())//将source.dwg中所有的attibute进行遍历
{
piterator->getentity(pent, acdb::kforread);
pattdef = acdbattributedefinition::cast(pent);
if (pattdef != null && !pattdef->isconstant()) {
acdbattribute *patt = new acdbattribute();
patt->setpropertiesfrom(pattdef);
patt->setinvisible(pattdef->isinvisible());
basepoint = pattdef->position();
basepoint += pblkref->position().asvector();
patt->setposition(basepoint);
patt->setheight(pattdef->height());
patt->setrotation(pattdef->rotation());
patt->settag("tag");
patt->setfieldlength(25);
char *pstr = pattdef->tag();
patt->settag(pstr);
acutdelstring(pstr);
patt->setfieldlength(pattdef->fieldlength());
patt->settextstring("-");
acdbobjectid attid;
pblkref->appendattribute(attid, patt);
patt->close();
}
pent->close(); // use pent... pattdef might be null
}
delete piterator;
和我的要求不一样啊,我要遍历的是块参照的块名啊,这个得到的是attibute,继续求答案,大侠们再帮帮忙啊,
而且我这边的基础不是很好,有没有介绍基础的好书推荐一下呢?