[ARX程序]：掏空面域后的填充

flaid

1个面域掏空后用下面的函数填充怎么找不到边界？？
AcDbObjectId CCreateEnt::CreateHatch(AcDbObjectIdArray objIds,
         const char* patName, bool bAssociative)
{
Acad::ErrorStatus es;
AcDbHatch *pHatch = new AcDbHatch();

// 设置填充平面
AcGeVector3d normal(0, 0, 1);
pHatch->setNormal(normal);
pHatch->setElevation(0);



// 设置关联性
pHatch->setAssociative(bAssociative);



// 设置填充图案
pHatch->setPattern(AcDbHatch::kPreDefined, patName);



// 设置填充样式
//pHatch->setStyle(AcDbHatch::kNormal);

// 添加填充边界
es = pHatch->appendLoop(AcDbHatch::kExternal, objIds);



// 显示填充对象
es = pHatch->evaluateHatch();



// 添加到模型空间
AcDbObjectId hatchId;
hatchId = CCreateEnt::PostToModelSpace(pHatch);

return hatchId;
}