topic Re: create hatch in ObjectARX Forum

create hatch

jignesh.rana — Wed, 22 May 2024 05:45:51 GMT

i want to create hatch of any object but exclude inner object

for e.g if one rectangle has text inside then hatch will be exclude that text

Re: create hatch

tbrammer — Fri, 24 May 2024 08:36:09 GMT

You can use

Acad::ErrorStatus AcDbHatch::appendLoop( Adesk::Int32 loopType, // AcDbHatch::kDefault for a hole in the hatch, AcDbHatch::kExternal for external const AcDbObjectIdArray& dbObjIds // ids of the text entities );

to create a hole around one or more DB resident (text-) entities. Or

Acad::ErrorStatus AcDbHatch::appendLoop( Adesk::Int32 loopType, const AcGePoint2dArray& vertices, const AcGeDoubleArray& bulges );

To create an arbitrary polyline shaped hole. When you are done call AcDbHatch::evaluateHatch() to update the hatch.

Re: create hatch

jignesh.rana — Fri, 24 May 2024 08:39:25 GMT

sir could you please share code of objectarx ?

Re: create hatch

jignesh.rana — Fri, 24 May 2024 08:54:51 GMT

here i attached drawing for refrence please look into this hatch is out of object

Re: create hatch

tbrammer — Fri, 24 May 2024 09:06:35 GMT

Sample code:

void cmdHatch() { ads_name sset = { 0,0 }; AcDbObjectIdArray outsideIds; // IDs of outer curve(s)/region AcDbObjectIdArray holeIds; // IDs of inner text(s)/pline(s)/region that shall create ONE hole. acutPrintf(_T("\nSelect entities that form the outer conture: ")); if (acedSSGet(NULL, NULL, NULL, NULL, sset) == RTNORM) { outsideIds.setLogicalLength(0); Selset2ObjIdArray(sset, outsideIds); acedSSFree(sset); } else return; Acad::ErrorStatus es; AcDbDatabase* db = acdbHostApplicationServices()->workingDatabase(); AcDbHatch* hatch = new AcDbHatch(); hatch->setDatabaseDefaults(db); es = hatch->appendLoop(AcDbHatch::kExternal, outsideIds); int stat = RTNORM; while (stat==RTNORM) { acutPrintf(_T("\nSelect entities that form one inner hole: ")); stat = acedSSGet(NULL, NULL, NULL, NULL, sset); if (stat == RTNORM) { holeIds.setLogicalLength(0); Selset2ObjIdArray(sset, holeIds); acedSSFree(sset); es = hatch->appendLoop(AcDbHatch::kDefault, holeIds); } } hatch->evaluateHatch(); postToDb(db, hatch); } long Selset2ObjIdArray(ads_name sset, AcDbObjectIdArray& objIdArr) { Adesk::Int32 selSetLen = 0, i; if (acedSSLength(sset, &selSetLen) != RTNORM) return -1; ads_name ename; AcDbObjectId objId; for (i = 0; i < selSetLen; i++) { if (acedSSName(sset, i, ename) == RTNORM) { if (acdbGetObjectId(objId, ename) == Acad::eOk) objIdArr.append(objId); } } return selSetLen; }

Re: create hatch

jignesh.rana — Fri, 24 May 2024 09:37:13 GMT

sir please try in this drawing which i attached

hatch is out of object

Re: create hatch

tbrammer — Fri, 24 May 2024 09:45:18 GMT

Works perfectly. Did I pick the right entities?

(view in My Videos)

Re: create hatch

jignesh.rana — Fri, 24 May 2024 09:48:01 GMT

please look into this

Re: create hatch

tbrammer — Fri, 24 May 2024 09:52:32 GMT

I don't know what you mean. Did you watch the video? Did I select the right entities?

Please post a DWG that only contains the entity that defines the outer bounds of the hatch and the text that shall be left out.

Which AutoCAD version do you use?

Re: create hatch

tbrammer — Fri, 24 May 2024 10:41:04 GMT

It looks as if you created a external hatch loop using the bounding points of the MTEXT entity.

This is what SNOOPENTS from the ArxDbg.arx (<ARX>\samples\database\ARXDBG) shows for the MTEXT:

And this for the hatch:

If you use my code the inner loop will look like this:

Re: create hatch

jignesh.rana — Wed, 03 Jul 2024 12:46:17 GMT

one more help required

want to set specific color for hatch for e.g red color i tried to set it

hatch->SetColorIndex(1);

but its not working

Re: create hatch

tbrammer — Mon, 08 Jul 2024 08:32:05 GMT

Acad::ErrorStatus es = hatch->setColorIndex(1);

should work. Please check whether it returns es==Acad::eOk.

Did you open hatch for write and close it after changing the color?

Maybe the graphics need a refresh. Try _REGEN or save and reopen the drawing.

If the hatch isn't "solid" or "gradient" the color is applied to the pattern of the hatch. If no part of the pattern is visible, you will only see the background color of the hatch - or the background itself if the background color is "none". Try

AcCmColor color; color.setColorIndex(1); hatch->setBackgroundColor(color);

Re: create hatch

jignesh.rana — Tue, 10 Sep 2024 11:57:50 GMT

in this logic if more than one closed polylines/regions in outer polyline then its not work

Re: create hatch

jignesh.rana — Thu, 12 Sep 2024 07:00:34 GMT

please share objectarx code to exclude inner objects more than one including text.

please see attachment/image