CAD旋转实体

#ifndef PI
#define PI 4*atan(1.0)//提高pi的精度
#endif

double dRotation=PI/2.0;//旋转角度为90度

AcGeVector3d axis=AcGeVector3d::kZAxis;//旋转轴一般设定为Z轴，二维的

//情况下

AcGePoint3d pt(0.0,0.0,0.0);//旋转中心为原点

AcGeMatrix3d mat;
    mat.setToRotation(dRotation,axis,pt);

AcDbEntityPointer spEnt(objId,AcDb::kForWrite);

Acad::ErrorStatus es=spEnt.openStatus();
 if(es!=Acad::eOk)
 {
  return es;
 }

spEnt->transformBy(mat);