【转帖】[求助]怎么样一次性画多条直线,进来看看代码
 

[求助]怎么样一次性画多条直线,进来看看代码
[求助]怎么样一次性画多条直线,进来看看代码
我想输入两个点的坐标之后出来两条直线,下面是画直线的代码,大家帮我看看
按照这段代码这样执行的话pline是一个点,pline2的直线倒能画出来,请问是怎么回事?
另ads_point,ads_name的定义哪里有得查啊?
谢谢
acad::errorstatus
posttodatabase(acdbentity* pent,acdbobjectid& idobj)
{
acad::errorstatus es;
acdbblocktable* pblocktable;
acdbblocktablerecord* pspacerecord;
if(acdbhostapplicationservices()->workingdatabase()==null)
return acad::enodatabase;
if ((es=acdbhostapplicationservices()->workingdatabase()->getblocktable(pblocktable,acdb::kforread))==acad::eok)
{
if((es=pblocktable->getat(acdb_model_space,pspacerecord,acdb::kforwrite))==acad::eok)
{
if((es=pspacerecord->appendacdbentity(idobj,pent))==acad::eok)
pent->close();
pspacerecord->close();
}
pblocktable->close();
}
return es;
}
//-----------------以下开始添加直线------------------------------------
acad::errorstatus newline()
{
ads_point pt1,pt2;
ads_point pt3,pt4;
int retval;
try
{
if((retval=acedgetpoint(null, "\nselect lower left:",pt1))!=rtnorm)
throw retval;
if((retval=acedgetpoint(pt1,"\nselect upper right:",pt2))!=rtnorm)
throw retval;
}
catch (int e)
{
if(e==rtcan)
return acad::euserbreak ;
if(e==rterror)
return acad::einvalidinput ;
}
pt3[x]=pt1[x];
pt3[y]=pt1[y]+10;
pt3[z]=pt1[z];
pt4[x]=pt1[x];
pt4[y]=pt1[y]+10;
pt4[z]=pt1[z];
acdbline* pline =new acdbline(aspnt3d(pt1),aspnt3d(pt2));
acdbline* pline2 =new acdbline(aspnt3d(pt3),aspnt3d(pt4));
if(!pline || !pline2)
{
acedalert("not enough memory to create a line!");
return acad::eoutofmemory ;
}
acdbobjectid id;
posttodatabase(pline,id);
return posttodatabase(pline2,id);
}
自己来坐沙发吧
pt3[x]=pt1[x];
pt3[y]=pt1[y]+10;
pt3[z]=pt1[z];
pt4[x]=pt1[x];
pt4[y]=pt1[y]+10;
pt4[z]=pt1[z];
晕死,这里写错了.应该为
pt3[x]=pt1[x];
pt3[y]=pt1[y]+10;
pt3[z]=pt1[z];
pt4[x]=pt2[x];
pt4[y]=pt2[y]+10;
pt4[z]=pt2[z];
大家还有更好的方法来实现这个多线么?
自己沙发了
pt3[x]=pt1[x];
pt3[y]=pt1[y]+10;
pt3[z]=pt1[z];
pt4[x]=pt1[x];
pt4[y]=pt1[y]+10;
pt4[z]=pt1[z];
错了,
应该为
pt3[x]=pt1[x];
pt3[y]=pt1[y]+10;
pt3[z]=pt1[z];
pt4[x]=pt2[x];
pt4[y]=pt2[y]+10;
pt4[z]=pt2[z];
既然你直接return不作处理，何必使用try/catch呢？
我的qq 172522850
try/catch是捕捉选点的时候的throw阿