ObjectARX学习笔记(十一)----创建圆弧AcDbArc

作者：繁依Fanyi0 | 2024-02-19 11:17:09

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acdbarc

AcDbArc(
    const AcGePoint3d& center, 
    double radius, 
    double startAngle, 
    double endAngle
);

Parameters

Parameters	Description
const AcGePoint3d& center	Input center point of the arc
double radius	Input radius of the arc
double startAngle	Input starting angle of the arc
double endAngle	Input ending angle of the arc

AcDbArc(
    const AcGePoint3d& center, 
    const AcGeVector3d& normal, 
    double radius, 
    double startAngle, 
    double endAngle
);

Parameters

Parameters	Description
const AcGePoint3d& center	Input center point of the arc
const AcGeVector3d& normal	Input normal vector of the plane containing the arc
double radius	Input radius of the arc
double startAngle	Input starting angle of the arc
double endAngle	Input ending angle of the arc

#define PI 3.1415926535897932384626433832795L

//创建圆弧
AcGePoint3d ptSart(0,0,0);
//输入的角度是弧度

AcDbArc *pArc= new AcDbArc(ptSart,200,0 , 90* PI / 180.0);

if (pArc == NULL)
return;

//将实体添加到模型空间是固定的代码，
AcDbDatabase* pDb = NULL;
pDb = acdbHostApplicationServices()->workingDatabase();
if (pDb == NULL)
return ;

AcDbBlockTable * pBlkTable ;
if(pDb->getBlockTable(pBlkTable , AcDb::kForRead) != Acad::eOk )
return ;

AcDbBlockTableRecord * pRec ;
if(pBlkTable->getAt(ACDB_MODEL_SPACE , pRec , AcDb::kForWrite) != Acad::eOk)
return ;
pBlkTable->close();

AcDbObjectId objId = AcDbObjectId::kNull;

if(pRec->appendAcDbEntity(objId, pArc) != Acad::eOk) //将线添加到dwg中
return ;

pArc->close() ;
pRec->close() ;

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