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这是比较简单的部分了，可以参考现有书籍。在网上下载两个画线的函数： 直线： void LineCreate(AcGePoint3d ptStart,AcGePoint3d ptEnd)2 ~/ V& k" h, _+ D( ^
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AcDbLine * pLine = new AcDbLine( ptStart , ptEnd );
3 Z. M% K; J& e; Y; b// 获得指向块表的指针
1 h3 \1 y) ^6 R! W2 iAcDbBlockTable *pBlockTable; acdbHostApplicationServices()->workingDatabase()
5 g' t% c4 ~7 g2 ^, b->getBlockTable(pBlockTable, AcDb::kForRead);0 D/ A; k+ R6 _+ f. l8 i
// 获得指向特定的块表记录（模型空间）的指针6 Q- p3 r+ R% x
AcDbBlockTableRecord *pBlockTableRecord;
: @" x; A+ n8 |/ QpBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
0 d" Q8 G" N' Q9 o# W J6 Z7 J9 F// 将AcDbLine类的对象添加到块表记录中
; @3 p; j4 q% X+ GAcDbObjectId lineId;
+ }9 U: T! R6 J2 p1 x+ b9 g* @& TpBlockTableRecord->appendAcDbEntity(lineId, pLine);
. V0 c' R, W$ p: O$ R// 关闭图形数据库的各种对象 R+ _2 D- l* r1 u3 e5 O- [
pBlockTable->close();) F5 S8 S0 U5 |( ]
pBlockTableRecord->close();* N0 F# i4 ^- g; w9 r
pLine->close();
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+ s4 a8 O6 B: }% _+ N7 [多线段：. [; g+ u( E/ |# z5 J
void CreatePolyline(AcGePoint2dArray points ,double width)& z. u8 k0 w- ?9 F
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int numVertices = points.length();
3 `0 S, l( ^, |8 V% ^AcDbPolyline *pPoly = new AcDbPolyline(numVertices);
* U& ]1 C% _9 A z- t2 Cfor (int i = 0; i < numVertices; i++)
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; l7 G" M' }9 q% `' Z$ ApPoly->addVertexAt(i, points.at(i), 0, width, width);
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AcDbObjectId polyId;( ?& m* F$ c" a+ V1 `3 _
polyId = PostToModelSpace(pPoly);
8 H$ g1 b7 Z I* i; H8 h" S6 r// return polyId;# O# k# W/ a% B+ `, M
}
# ~$ v& ~5 H3 Nstatic AcDbObjectId PostToModelSpace(AcDbEntity* pEnt)
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AcDbBlockTable *pBlockTable;. C5 p1 {* W8 @; g- i
acdbHostApplicationServices()->workingDatabase() ->getBlockTable(pBlockTable, AcDb::kForRead);
$ J2 h! L7 `/ @: I5 E4 GAcDbBlockTableRecord *pBlockTableRecord;
, @; q, |6 A0 ], C' kpBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
" l7 _1 Q& {0 w, sAcDbObjectId entId;+ m4 I. K: K- n+ Z) w% z
pBlockTableRecord->appendAcDbEntity(entId, pEnt);' a- A% M+ D) x% `4 Q
pBlockTable->close();
+ ~0 Q+ Z7 [; }# ?' P9 i: GpBlockTableRecord->close();
0 n, Y/ P. V% G7 {, a* U- TpEnt->close();
I) c7 c% Z6 Oreturn entId; } 3 L$ \3 K# g _$ C
需要注意的是：创建线段与显示线段需要不同的代码。 参考：http://www.colinchou.com/archives/242, `5 Y9 H9 \0 s. A) |0 d
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http://www.3dportal.cn/discuz/source/plugin/sina_xweibo_x3/xwb/images/bgimg/icon_logo.png 该贴已经同步到 colinzhoucn的微博 | 
发表于 2013-12-9 17:00:54