ObjectARX学习笔记(十一)----创建圆弧AcDbArc

爱被打了一巴掌 2022-08-25 09:27 277阅读 0赞

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

![Image 1][]Parameters

<table> 
 <tbody> 
  <tr> 
   <td> 
    <div>
      Parameters 
    </div> </td> 
   <td> 
    <div>
      Description 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      const AcGePoint3d&amp; center 
    </div> </td> 
   <td> 
    <div>
      Input center point of the arc 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      double radius 
    </div> </td> 
   <td> 
    <div>
      Input radius of the arc 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      double startAngle 
    </div> </td> 
   <td> 
    <div>
      Input starting angle of the arc 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      double endAngle 
    </div> </td> 
   <td> 
    <div>
      Input ending angle of the arc&nbsp; 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

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

![Image 1][]Parameters

<table> 
 <tbody> 
  <tr> 
   <td> 
    <div>
      Parameters 
    </div> </td> 
   <td> 
    <div>
      Description 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      const AcGePoint3d&amp; center 
    </div> </td> 
   <td> 
    <div>
      Input center point of the arc 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      const AcGeVector3d&amp; normal 
    </div> </td> 
   <td> 
    <div>
      Input normal vector of the plane containing the arc 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      double radius 
    </div> </td> 
   <td> 
    <div>
      Input radius of the arc 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      double startAngle 
    </div> </td> 
   <td> 
    <div>
      Input starting angle of the arc 
    </div> </td> 
  </tr> 
  <tr> 
   <td> 
    <div>
      double endAngle 
    </div> </td> 
   <td> 
    <div>
      Input ending angle of the arc&nbsp; 
    </div> </td> 
  </tr> 
 </tbody> 
</table>

\#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() ;

[Image 1]: