AcDbRegion::transformBy在2014和2015结果不同的解决方案

LoveArx

Question:  
I have a situation where the use of the method AcDbRegion::transformBy is giving me different results in AutoCAD 2015 as opposed to AutoCAD 2014. Can you tell me what has changed in the method that would account for the change.

Answer :
It worked in Acad 2014 because we used a bigger tolerance before (equalPoint to 1.0e-8 and  equalVector to 1.0e-6). In Acad 2015 the tolerance setting was removed,this change is having impact on few scenarios ,one such scenario is illustrated below and possible workaround is also demonstrated. Thanks to our ADN partner for surfacing this behavior.

To restore legacy behavior in such circumstances we may have to reset system wide tolerance to

/*Resetting sytsem wide tolerance for ACAD 2015*/

AcGeContext::gTol.setEqualPoint(1.0e-8);

AcGeContext::gTol.setEqualVector(1.0e-6);

1. static void transformTest()
   
2. {
   
3.         /*Resetting sytsem wide tolerance for ACAD 2015*/
   
4.         AcGeContext::gTol.setEqualPoint(1.0e-8);
   
5.         AcGeContext::gTol.setEqualVector(1.0e-6);
   
6. 
   
7.         double epTol = AcGeContext::gTol.equalPoint();
   
8.         double evTol = AcGeContext::gTol.equalVector();
   
9. 
   
10.         CString msg;
    
11.         msg.Format(_T("point tolerance is %e, and vector tolerance is %e\n"), epTol, evTol);
    
12.         acedPrompt(msg);
    
13. 
    
14.         // Second, create a transform matrix that maps from one coordinate syste to another
    
15. 
    
16.         AcGePoint3d startPoint;
    
17.         AcGeVector3d mStockProfileXDir, mExtrudeDir, mNormalDir;
    
18. 
    
19.         startPoint.set(12342.705102605765, -14874.057509290647, 25.766600469474248);
    
20. 
    
21.         mStockProfileXDir.set(0.00000000000000000, 1.0000000000000000, 0.00000000000000000);
    
22.         mNormalDir.set(-0.048960818631765893, -6.4357153980460105e-012, 0.99880069995915965);
    
23.         mExtrudeDir.set(-0.99880069995915977, 0.00000000000000000, -0.048960818631764047);
    
24. 
    
25.         AcGeMatrix3d xform;
    
26.         xform.setToAlignCoordSys(AcGePoint3d(0, 0, 0),
    
27.                 AcGeVector3d::kXAxis,
    
28.                 AcGeVector3d::kYAxis,
    
29.                 AcGeVector3d::kZAxis,
    
30.                 startPoint,
    
31.                 mStockProfileXDir,
    
32.                 mNormalDir,
    
33.                 mExtrudeDir);
    
34. 
    
35.         // Is the new coordinate system orthogonal?
    
36. 
    
37.         if (!xform.isUniScaledOrtho())
    
38.                 acedPrompt(_T("Transform matrix axes are not orthogonal\n"));
    
39.         else
    
40.                 acedPrompt(_T("Transform matrix axes are orthogonal\n"));
    
41. 
    
42. 
    
43.         // Finally, transform a region to the new coordinate system.
    
44.         AcDbVoidPtrArray curves, regions;
    
45.         AcDbCircle *pTestCircle = new AcDbCircle(AcGePoint3d::kOrigin, AcGeVector3d::kZAxis, 10.0);
    
46. 
    
47.         if (pTestCircle != NULL)
    
48.         {
    
49.                 curves.append(pTestCircle);
    
50. 
    
51.                 AcDbRegion::createFromCurves(curves, regions);
    
52.                 if (regions.length() != 0)
    
53.                 {
    
54.                         for (int i = 0; i < regions.length(); i++)
    
55.                         {
    
56.                                 AcDbRegion* testRegion = static_cast<AcDbRegion*>(regions);
    
57.                                 Acad::ErrorStatus es = testRegion->transformBy(xform);
    
58.                                 delete testRegion;
    
59.                                 msg.Format(_T("The transform operation returned %d\n"), es);
    
60.                                 acedPrompt(msg);
    
61.                         }
    
62.                 }
    
63. 
    
64.                 delete pTestCircle;
    
65.         }
    
66. }
    

static void transformTest()<br /> {<br />         /*Resetting sytsem wide tolerance for ACAD 2015*/<br />         AcGeContext::gTol.setEqualPoint(1.0e-8);<br />         AcGeContext::gTol.setEqualVector(1.0e-6);<br /> <br />         double epTol = AcGeContext::gTol.equalPoint();<br />         double evTol = AcGeContext::gTol.equalVector();<br /> <br />         CString msg;<br />         msg.Format(_T("point tolerance is %e, and vector tolerance is %e\n"), epTol, evTol);<br />         acedPrompt(msg);<br /> <br />         // Second, create a transform matrix that maps from one coordinate syste to another<br /> <br />         AcGePoint3d startPoint;<br />         AcGeVector3d mStockProfileXDir, mExtrudeDir, mNormalDir;<br /> <br />         startPoint.set(12342.705102605765, -14874.057509290647, 25.766600469474248);<br /> <br />         mStockProfileXDir.set(0.00000000000000000, 1.0000000000000000, 0.00000000000000000);<br />         mNormalDir.set(-0.048960818631765893, -6.4357153980460105e-012, 0.99880069995915965);<br />         mExtrudeDir.set(-0.99880069995915977, 0.00000000000000000, -0.048960818631764047);<br /> <br />         AcGeMatrix3d xform;<br />         xform.setToAlignCoordSys(AcGePoint3d(0, 0, 0),<br />                 AcGeVector3d::kXAxis,<br />                 AcGeVector3d::kYAxis,<br />                 AcGeVector3d::kZAxis,<br />                 startPoint,<br />                 mStockProfileXDir,<br />                 mNormalDir,<br />                 mExtrudeDir);<br /> <br />         // Is the new coordinate system orthogonal?<br /> <br />         if (!xform.isUniScaledOrtho())<br />                 acedPrompt(_T("Transform matrix axes are not orthogonal\n"));<br />         else<br />                 acedPrompt(_T("Transform matrix axes are orthogonal\n"));<br /> <br /> <br />         // Finally, transform a region to the new coordinate system.<br />         AcDbVoidPtrArray curves, regions;<br />         AcDbCircle *pTestCircle = new AcDbCircle(AcGePoint3d::kOrigin, AcGeVector3d::kZAxis, 10.0);<br /> <br />         if (pTestCircle != NULL)<br />         {<br />                 curves.append(pTestCircle);<br /> <br />                 AcDbRegion::createFromCurves(curves, regions);<br />                 if (regions.length() != 0)<br />                 {<br />                         for (int i = 0; i < regions.length(); i++)<br />                         {<br />                                 AcDbRegion* testRegion = static_cast<AcDbRegion*>(regions<i>);<br />                                 Acad::ErrorStatus es = testRegion->transformBy(xform);<br />                                 delete testRegion;<br />                                 msg.Format(_T("The transform operation returned %d\n"), es);<br />                                 acedPrompt(msg);<br />                         }<br />                 }<br /> <br />                 delete pTestCircle;<br />         }<br /> }<br />

革天明

谢谢楼主分享，这个细节还没有发现，挺好的资料