获得当前图形中所有实体的最小包围盒

AcDbBlockTable *pBlkTbl;

AcDbBlockTableRecord *pBlkTblRcd;

acdbHostApplicationServices()->workingDatabase()

->getBlockTable(pBlkTbl, AcDb::kForRead);

pBlkTbl->getAt(ACDB_MODEL_SPACE, pBlkTblRcd,

AcDb::kForRead);

pBlkTbl->close();

/ /获得当前图形中所有实体的最小包围盒

AcDbExtents extent;

extent.addBlockExt(pBlkTblRcd);

pBlkTblRcd->close();

// 计算长方形的顶点

ads_point pt[7];

pt[0][X] = pt[3][X] = pt[4][X] = pt[7][X] = extent.minPoint().x;

pt[1][X] = pt[2][X] = pt[5][X] = pt[6][X] = extent.maxPoint().x;

pt[0][Y] = pt[1][Y] = pt[4][Y] = pt[5][Y] = extent.minPoint().y;

pt[2][Y] = pt[3][Y] = pt[6][Y] = pt[7][Y] = extent.maxPoint().y;

pt[0][Z] = pt[1][Z] = pt[2][Z] = pt[3][Z] = extent.maxPoint().z;

pt[4][Z] = pt[5][Z] = pt[6][Z] = pt[7][Z] = extent.minPoint().z;

acedGetVar(_T("EXTMAX"),&rb1);//获取当前图形的右上角点坐标

acedGetVar(_T("EXTMIN"),&rb2);//获取当前图形的左下角点坐标

AcGePoint3d maxPt;

AcGePoint3d minPt;

maxPt[X]=rb1.resval.rpoint[X];

maxPt[Y]=rb1.resval.rpoint[Y];

minPt[X]=rb2.resval.rpoint[X];

minPt[Y]=rb2.resval.rpoint[Y];

maxPt[Z]=minPt[Z]=0;