1ObjectArx1objectArx入門1.1ObjectArx概述1.2ObjectArx類庫1.3arx程序的創建以及結構1.1ObjectArx概述1.1.3objectARX類庫arx程序的創建以及結構arx程序的創建以及結構arx程序的創建以及結構2數據庫操作2.1數據庫的表2.2打開關閉數據庫表2.3向表中添加實體圖形(注冊新命令)ACED_ARXCOMMAND_ENTRY_AUTO(CPostProcessingApp,PostProcessingApp,_PH,ph,ACRX_CMD_TRANSPARENT,NULL)CPostProcessingApp:工程入口函數所在類名PostProcessingApp:命令組_ph:globle命令gh:本地命令AcdbCircle*pCircle=newAcdbCircle();AcDbBlockTable*pBlockTable=NULL;Acad::ErrorStatuses=acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable,AcDb::kForRead);if(es!=Acad::eOk||pBlockTable==NULL){returnfalse;}AcDbBlockTableRecord*pBlockTableRec=NULL;es=pBlockTable->getAt(ACDB_MODEL_SPACE,pBlockTableRec,AcDb::kForWrite);if(es!=Acad::eOk||pBlockTableRec==NULL){pBlockTable->close();returnfalse;}pBlockTable->close();pBlockTableRec->appendAcDbEntity(pCircle);pBlockTableRec->close();3實體3.1實體類的層次3.2AcdbEntity類3.3AcdbPolyline類Addvertexat:指定位置添加或者設置頂點setBulgeat:指定位置添加點的凸度setPointAt:指定位置設置點getArcAt:取得指定位置的弧getLineSegAt:取得指定位置的線getPointAt:取得指定位置的點Numverts:取得多線的頂點個數4容器對象4.1數據庫中的表,遍歷器AcDbBlockTableRecordIterator*pIterator=NULL;pTableRec->newIterator(pIterator);//遍歷快表找出選擇實體IDfor(pIterator->start();!pIterator->done();pIterator->step()){AcDbEntity*pEnt=NULL;if(Acad::eOk!=pIterator->getEntity(pEnt,AcDb::kForWrite)){continue;}AcDbObjectIdobjId;objId=pEnt->objectId();if(objId==NULL){continue;}objIdArray.append(objId);pEnt->close();}deletepIterator;pTableRec->close();4.3組,字典.4.3組,字典.5arx全局函數與例程分析5.1acedSSGet();5.2acdbOpenObject()5.3acedCommand5.4acutPrintf();6綜合運用a=arccos=a*b/|a||b|查乘越大兩個向量越接近同時可以求出兩個向量的夾角二向量的叉乘和點乘