create hatch

[jignesh.rana]

hi 

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 

[tbrammer]

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.

[jignesh.rana]

sir could you please share code of objectarx ?

[jignesh.rana]

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

[tbrammer]

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;
}

[jignesh.rana]

sir please try in this drawing which i attached

hatch is out of object

[tbrammer]

Works perfectly. Did I pick the right entities?

[jignesh.rana]

please look into this 

[tbrammer]

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?

[tbrammer]

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:

[jignesh.rana]

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

[tbrammer]

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);

[jignesh.rana]

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

[jignesh.rana]

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

please see attachment/image