[求助]在ARX中如何使用trim和break

apple06

我想在ARX中使用trim和break函数，并能捕捉到图元对象的交点，不知该如何操作。望各位高手不惜赐教，最好能上传一个简单的例子，谢谢啦。

apple06

好掺,至今仍没有人回答,各位高手拜托了,想想办法帮帮忙吧

nc2t

哪位兄弟知道实现方法，请不吝赐教

BDYCAD

1. AcDbBlockTableRecord *GetModelSpace(AcDb::OpenMode Mode){
2. AcDbDatabase *pDwg = acdbHostApplicationServices()->workingDatabase();
3. AcDbBlockTable *pBlockTable;
4. AcDbBlockTableRecord *pModelSpace;
5. pDwg->getSymbolTable(pBlockTable, AcDb::kForRead);
6. pBlockTable->getAt(ACDB_MODEL_SPACE, pModelSpace, Mode);
7. pBlockTable->close();
8. return pModelSpace;
9. }
10. AcDbObjectIdArray BreakEntity(AcDbObjectId ObjId,AcGePoint3d Spt,AcGePoint3d Ept){
11. double param1,param2;
12. AcGePoint3d p11,p21;
13. AcDbEntity *pEnt;
14. AcDbCurve *pCurve;
15. AcDbObjectId NobjID;
16. AcGeDoubleArray params;
17. AcDbObjectIdArray BreakNewObjID=NULL;
18. acdbOpenObject(pCurve,ObjId,AcDb::kForWrite);
19. pCurve->getClosestPointTo(Spt,p11);
20. pCurve->getClosestPointTo(Ept,p21);
21. pCurve->getParamAtPoint(p11,param1);
22. pCurve->getParamAtPoint(p21,param2);
23. if (param1<param2){
24.   params.append(param1);
25.   params.append(param2);
26. }else{
27.   params.append(param2);
28.   params.append(param1);
29. }
30. AcDbVoidPtrArray curveSegments;
31. pCurve->getSplitCurves(params, curveSegments);
32. AcDbBlockTableRecord *pModelSpace=GetModelSpace(AcDb::kForWrite);
33. for (int i=0;curveSegments.length()>i;i++) {
34.   pEnt=(AcDbEntity*)curveSegments.at(i);
35.   pModelSpace->appendAcDbEntity(NobjID,pEnt);
36.   BreakNewObjID.append(NobjID);
37.   pEnt->close();
38. }
39. pModelSpace->close();
40. pCurve->close();
41. return BreakNewObjID;
42. }

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