ObjectARX获取当前视图范围内的所有实体，用于局部选择时提前筛选

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1. void PluginCommand::Test()
2. {
3.     struct resbuf sysVar;
4.     acedGetVar(_T("SCREENSIZE"), &sysVar);
5.     int nScreenX = (short)sysVar.resval.rpoint[0];
6.     int nScreenY = (short)sysVar.resval.rpoint[1];
7.     acedGetVar(_T("VIEWSIZE"), &sysVar);
8.     double dViewSize = sysVar.resval.rreal;
9.     acedGetVar(_T("PICKBOX"), &sysVar);
10.     double dScale = dViewSize / nScreenY;
11.     acutPrintf(_T("nScreenX = %d, nScreenY = %d, dViewSize = %.3f, dScale = %.3f\n"), nScreenX, nScreenY, dViewSize, dScale);
13.     //获取view的rect
14.     CRect viewRect;
15.     GetClientRect(acedGetAcadDwgView()->m_hWnd, &viewRect);
16.     //viewRect转到图纸中的点
17.     acedDwgPoint dwgPt1, dwgPt2;
18.     //获取视口编号
19.     struct resbuf v;
20.     if (acedGetVar(_T("cvport"), &v) == RTNORM)
21.     {
22.         int wndNum = v.resval.rint;
23.         acedCoordFromPixelToWorld(wndNum, viewRect.TopLeft(), dwgPt1);
24.         acedCoordFromPixelToWorld(wndNum, viewRect.BottomRight(), dwgPt2);
25.     }
26.     else
27.     {
28.         acedCoordFromPixelToWorld(viewRect.TopLeft(), dwgPt1);
29.         acedCoordFromPixelToWorld(viewRect.BottomRight(), dwgPt2);
30.     }
31.     //pt1和pt2是世界坐标系下的点
32.     AcGePoint3d ptStart = PublicFunction::TransWcs2Ucs(asPnt3d(dwgPt1));
33.     ptStart.z = 0.0;
34.     AcGePoint3d ptEnd = PublicFunction::TransWcs2Ucs(asPnt3d(dwgPt2));
35.     ptEnd.z = 0.0;
36.     ads_point p1;
37.     ads_point_set(asDblArray(ptStart), p1);
38.     ads_point p2;
39.     ads_point_set(asDblArray(ptEnd), p2);
40.     //选择该视图内的全部实体
41.     ads_name ssname;
42.     int ret = acedSSGet(_T("C"), p1, p2, NULL, ssname);
43.     acedSSSetFirst(ssname, NULL);
44.     ads_ssfree(ssname);
45. }

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