Autodesk ObjectARX

[#1]

as we know, there is a lisp command "flatten" in the CAD express tool, and I want to execute "flatten" in my ARX application, I searched the internet and found the following code:

resbuf *rb_in = acutBuildList(RTSTR,"c:flatten",RTNONE);
resbuf *rb_out = NULL;
int rc = acedInvoke(rb_in,&rb_out);
acutRelRb(rb_in);
acutRelRb(rb_out);

this works, but i can not add arguments like this,

resbuf *rb_in = acutBuildList(RTSTR,_T("c:flatten"),RTPICKS,ssName,RTNONE);

the comand line returns "too many arguments".

[#2]

c:flatten does not accept any parameters, it will prompt for the selection set and hidden line removal and pass it on to acet-flatn; I'm not sure there is any way to do what you need with acedInvoke. Perhaps you could define an AutoLISP function, that would accept the selection set as a parameter and call acet-flatn with it?

[#3]

---

oliver253m wrote:

...I'm not sure there is any way to do what you need with acedInvoke...

---

With help of acedInvoke can be calling next types of lisp-functions:

a) functions with C: prefix

b) functions registered with (vl-acad-defun 'function_name)

[#4]

thanks a lot, I tested my code on Acad2008 according your advice,but failed.

can you do me a favor ?  what's wrong with my following code?

first, I modified the lisp file "FlattenSup.lsp" (in the attachment), I added "(vl-acad-defun 'acet-flatn)" in the end.

secondly,I write the following code in VS2005 with objectArx2008.

        AcDbObjectId idNew = Acad_System::cloneObjects(idSpline);
        ads_name ent;
        if (Acad::eOk != acdbGetAdsName(ent,idNew))
        {
            return AcDbObjectId::kNull;
        }
        ads_name ssName;
        ads_ssadd(NULL,NULL,ssName);
        ads_ssadd(ent,ssName,ssName);

        ads_name entLast,entNew;
        ads_entlast(entLast);

        
        resbuf *rb_in = acutBuildList(RTSTR,_T("acet-flatn"),RTPICKS,ssName,RTSHORT,0,RTNONE);
        resbuf *rb_out = NULL;
        int es = acedInvoke(rb_in,&rb_out);
        acutPrintf(_T("\n%d"),es);//I am not sure here, why it always returns RTERROR.
        acutRelRb(rb_in);
        acutRelRb(rb_out);
        ads_ssfree(ssName);
        ads_entlast(entNew);
        //Acad_System:endCommand(_T("no "));
        if (ads_name_equal(entLast,entNew))
        {
        //    ads_entdel(ent);
            return AcDbObjectId::kNull;
        }

        return AcDbObjectId(aname(entNew));

[#5]

1. I hope your's code is calling from document context.

2. I hope this version of flattensup.lsp was loaded before you call acedInvoke

Other way is calling undocumented function acedEvaluateLisp():

int __cdecl acedEvaluateLisp(wchar_t const *str, struct resbuf *&result);

where str is a lisp-expression, and result is a result of evaluation of this lisp-expression