[其他]：请问关于arx里BHatch怎么用,谢谢

guochen_buaa

在autocad里的操作是这样的:
BHatch命令后,在对话框中,类型选择用户定义,角度**,间距**,点击拾取点,然后确定.

这样的过程在arx程序里面怎么实现?
谢谢

binbin

1. 
   
2.   [FONT=courier new]
   
3. Acad::ErrorStatus acqHatch1()
   
4. {
   
5.     AcDbHatch* pHatch = new AcDbHatch();
   
6. 
   
7.     // Set hatch plane
   
8.     //
   
9.     AcGeVector3d normal(0.0, 0.0, 1.0);
   
10.     pHatch->setNormal(normal);
    
11.     pHatch->setElevation(0.0);
    
12. 
    
13.     // Set non associative hatch
    
14.     //
    
15.     pHatch->setAssociative(Adesk::kFalse);
    
16. 
    
17.     // Set hatch pattern to SolidFill type
    
18.     //
    
19.     pHatch->setPattern(AcDbHatch::kPreDefined, "SOLID");
    
20. 
    
21.     // Set hatch style to kNormal
    
22.     //
    
23.     pHatch->setStyle(AcDbHatch::kNormal);
    
24. 
    
25.     // Construct hatch external boundary
    
26.     //
    
27.     AcGePoint2dArray vertexPts;
    
28.     AcGeDoubleArray vertexBulges;
    
29.     vertexPts.setPhysicalLength(0).setLogicalLength(5);
    
30.     vertexPts[0].set(2.0, 2.0);
    
31.     vertexPts[1].set(8.0, 2.0);
    
32.     vertexPts[2].set(8.0, 8.0);
    
33.     vertexPts[3].set(2.0, 8.0);
    
34.     vertexPts[4].set(2.0, 2.0);
    
35.     vertexBulges.setPhysicalLength(0).setLogicalLength(5);
    
36.     for (int i = 0; i < 5, i++)
    
37.         vertexBulges[i] = 0.0;
    
38. 
    
39.     // Append an external loop (rectangle) to hatch boundary
    
40.    
    
41.     pHatch->appendLoop(AcDbHatch::kExternal, vertexPts, vertexBulges);
    
42. 
    
43.     // Construct a circle
    
44.     //
    
45.     AcGePoint2d cenPt(5.0, 5.0);
    
46.     double TWOPI = 2.0 * 3.1415926535897932;
    
47.     AcGeCircArc2d *cirArc = new AcGeCircArc2d();
    
48.     cirArc->setCenter(cenPt);
    
49.     cirArc->setRadius(1.0);
    
50.     cirArc->setAngles(0.0, TWOPI);
    
51. 
    
52.     // Append an internal circular loop to hatch boundary
    
53.     //
    
54.     AcGeIntArray edgeTypes;
    
55.     AcGeVoidPointerArray edgePtrs;
    
56.     edgeTypes.append(AcDbHatch::kCirArc);
    
57.     edgePtrs.append((void*)cirArc);
    
58.     pHatch->appendLoop(AcDbHatch::kDefault, edgePtrs, edgeTypes);
    
59.    
    
60.     // Elaborate solid fill
    
61.     //
    
62.     pHatch->evaluateHatch();
    
63. 
    
64.     // Post hatch entity to database
    
65.     //
    
66.     pHatch->postToDb(pHatch);
    
67. 
    
68.     return eOk;
    
69. }
    
70.   [/FONT]
    

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