[每日一码] ARX - Ordinate Dimension Text 在旋转UCS下不正确的解决方案

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1. void ASDKtestOrd()
2. {
3.     ads采用point pt1;
4.     if( RTNORM != acedGetPoint(NULL,L"\n Select point for ord dim", pt1) )
5.        {return;}
7.     AcGePoint3d ptx1(pt1[X],pt1[Y],pt1[Z]);
8.     AcGePoint3d pT2;
9.     AcGeMatrix3d mx;
11.     AcDbDatabase *pDb = acdbHostApplicationServices()->workingDatabase();
12.     if ( !acdbUcsMatrix(mx, pDb) )
13.     {
14.        return;
15.     }
18.     //pT2 is the point for the leader
19.     pT2[0] = ptx1[0];
20.     pT2[1] = ptx1[1]-3.0; //leader point dropped down 3 units  below
21.     pT2[2] = ptx1[2];
23.     AcDbOrdinateDimension *pDim = new AcDbOrdinateDimension(Adesk::kTrue,ptx1,pT2,NULL,NULL);
25.     //Xaxis
26.     AcGeVector3d mXPrev = AcGeVector3d::kXAxis;
29.     //get the old HorizontalRotation
30.     double mOldHorzRot = pDim->horizontalRotation();
31.     AcGeMatrix3d mMat; //matrix to build the ECS
34.     //get the old Xaxis and transform it to current plane
35.     mMat.setToPlaneToWorld(pDim->normal()); //ECS
36.     mXPrev.transformBy(mMat); //get the ECS xaxis in the world coordinates
37.     mXPrev.transformBy(mx); //tranform the current xaxis to new plane defined by mx.
40.     //transform the dimension entity by the given transformation matrix
41.     pDim->transformBy(mx);
44.     //get the xAxis after transformation of the dimension entity
45.     mMat.setToWorldToPlane(pDim->normal());
46.     mXPrev.transformBy(mMat); //transform the old axis to the current ECS.
49.     //get the angle of the old xaxis with respect to the current xaxis
50.     double mNewHorzRot = - atan2(mXPrev.y, mXPrev.x);
51.     pDim->setHorizontalRotation(mOldHorzRot + mNewHorzRot);
54.     AcDbBlockTable *pBlockTableD;
55.     acdbHostApplicationServices()->workingDatabase()
56.        ->getSymbolTable(pBlockTableD, AcDb::kForRead);
59.     AcDbBlockTableRecord *pBlockTableRecordD;
60.     pBlockTableD->getAt(ACDB采用MODEL采用SPACE, pBlockTableRecordD, AcDb::kForWrite);
61.     pBlockTableD->close();
64.     AcDbObjectId dimIdD;
65.     pBlockTableRecordD->appendAcDbEntity(dimIdD, pDim);
68.     pBlockTableRecordD->close();
69.     pDim->close();
70. }

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