topic Re: viewport specific graphics in ObjectARX Forum

viewport specific graphics

Anonymous — Tue, 16 Jun 2015 06:25:30 GMT

Hi all,

I want to draw some autocad entities only on the active viewport while there are multiple viewports in modelspace. I don't want these entities to be shown on the other viewports which are not active. How could I do that ?

I am using AcGiViewportDraw.geometry() to draw these entities.

Any help would be greatly appreicated. Thank you in advance.

Re: viewport specific graphics

ynapeu — Tue, 16 Jun 2015 09:40:41 GMT

Here you get the current viewport

http://forums.autodesk.com/t5/objectarx/current-viewport/td-p/1658244

and with subViewportDraw you can draw the entities you want.

Re: viewport specific graphics

Anonymous — Tue, 16 Jun 2015 11:23:22 GMT

Thanks for the reply,

my question is, how do I connect subViewportDraw's AcGiViewportDraw object with the current viewport ?

Re: viewport specific graphics

maisoui — Wed, 17 Jun 2015 08:51:34 GMT

Hi,

No idea how to do that, but here is a suggestion. Get value of the CVPORT variable to get the current AcDbViewportTableRecord and compare to the viewport of your AcGiViewportDraw. But I guess that in model space AcGiViewportDraw::viewportObjectId will be null...

notes:

cvport==1 && tilemode==0 => PSPACE
cvport>1 && tilemode==0 => MSPACE (PSPACE view with an activated floating MSPACE viewport)
cvport>1 && tilemode==1 => MSPACE
cvport==1 && tilemode==1 => This is not valid.

Another approach is to "link" your entity to a certain view. Per example, your entity is only drawn when the view direction is codirectionnal to your entity's normal vector.

Regards,

Re: viewport specific graphics

ynapeu — Wed, 17 Jun 2015 09:33:48 GMT

not tested only an idea.

subViewportDraw(AcGiViewportDraw *pV)

{

assertReadEnabled();

AcString name_activ;

acedVports2VportTableRecords();

AcDbViewportTable* pViewportTbl;

(acdbHostApplicationServices()->workingDatabase())->getSymbolTable(pViewportTbl,AcDb::kForRead);

AcDbViewportTableIterator * pViewportTblRecIterator;

pViewportTbl->newIterator(pViewportTblRecIterator);

long iview_number;

iview_number=pV->viewport().acadWindowId();

for(pViewportTblRecIterator->start();!pViewportTblRecIterator->done(); pViewportTblRecIterator->step())

{

AcDbViewportTableRecord * pViewportTblRec;

pViewportTblRecIterator->getRecord(pViewportTblRec,AcDb::kForRead);

pViewportTblRec->getName(name_activ);

if (name_activ == _T("*Active"))

{

if (pViewportTblRec->number() == iview_number)

{

// only draw here

}

else

{

// don't draw in this viewport

}

pViewportTblRec->close();

}

pViewportTbl->close();

Re: viewport specific graphics

Anonymous — Wed, 17 Jun 2015 15:25:06 GMT

Thanks a lot for your replies.

pViewportTblRec->number() returns 0 during regen. So, I just compared CVPORT variable to iview_number and the is solved.

acedGetVar (_T("CVPORT"), &rb);

int iview_number=pV->viewport().acadWindowId();
if (iview_number == rb.resval.rint) {
//    Only draw here
}