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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)
: K, ]6 r3 `" y$ K/ f{
: {2 g; H7 t5 A# \0 @AcDbLine * pLine = new AcDbLine( ptStart , ptEnd );2 @5 M( I% T/ e9 M S
// 获得指向块表的指针
4 I$ M0 u! S5 x7 [AcDbBlockTable *pBlockTable; acdbHostApplicationServices()->workingDatabase()
6 R T# \ T) v: H->getBlockTable(pBlockTable, AcDb::kForRead);
4 ^; K: E: F% J2 |// 获得指向特定的块表记录（模型空间）的指针
" i$ a B+ ?# @0 P1 Q/ `) w. nAcDbBlockTableRecord *pBlockTableRecord;6 Y- |; y6 u2 p1 f
pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
" Y! h: [7 h; d' W! A// 将AcDbLine类的对象添加到块表记录中1 |# V. x. B5 I. h9 @! s* } u& e2 E
AcDbObjectId lineId;7 _& P1 N! G* F! J. ]- c
pBlockTableRecord->appendAcDbEntity(lineId, pLine);
4 z1 u0 M1 m9 ]9 n2 ~) ~// 关闭图形数据库的各种对象
5 T! b2 B; d, b. UpBlockTable->close();
2 E- P3 y; z7 e0 j2 w% D( n: zpBlockTableRecord->close();
; K1 N, n$ r0 U/ K. YpLine->close();6 \& n( H0 A" N6 N0 i
}
c* ]4 t9 G3 f0 [2 H# U多线段：3 r/ V- x7 n( z" W1 R/ E
void CreatePolyline(AcGePoint2dArray points ,double width)
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int numVertices = points.length();
A- i! H7 F& j& i' @AcDbPolyline *pPoly = new AcDbPolyline(numVertices);
$ Y( e1 V( `6 w( i2 f0 i' E" ofor (int i = 0; i < numVertices; i++)* V) E( l b# B& ]) z$ Z
{
# W4 K1 ]! j( R9 Z: W# Q& ~pPoly->addVertexAt(i, points.at(i), 0, width, width);) p9 m/ f4 Q, P. W- p% A
}
% I( H1 b) m/ }2 d0 M3 |AcDbObjectId polyId;
; P" X0 }* P1 ipolyId = PostToModelSpace(pPoly);
0 l! n, F3 C9 I+ k// return polyId; S3 ^5 m* N) f/ q3 C8 s
}
1 ]6 r; ?5 [' G% H9 O! _# Sstatic AcDbObjectId PostToModelSpace(AcDbEntity* pEnt)& L- t! D. n: G( b% P: n! I
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AcDbBlockTable *pBlockTable;
h1 u7 O; h; w$ M" \acdbHostApplicationServices()->workingDatabase() ->getBlockTable(pBlockTable, AcDb::kForRead);: R" p1 ]% L0 B9 [( l3 {4 E- p! M* {* e
AcDbBlockTableRecord *pBlockTableRecord;
: @; X- v* ~, ?! H+ S0 L+ p* j8 {pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
* Q7 E& G; R1 v0 b$ y" Q. C' ZAcDbObjectId entId;! {) O |6 M, F8 _: K8 X. X, I6 ]
pBlockTableRecord->appendAcDbEntity(entId, pEnt);( G, r! p$ X/ ~! {- l
pBlockTable->close();
" H: O/ l: _/ T) o& S) [pBlockTableRecord->close();
2 f4 n2 y b! K: D6 [: t- MpEnt->close();" J- o+ t+ h, m# _
return entId; } : F F7 p& Z+ G' A! x4 t5 w2 W; T
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
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/ s- h+ t3 ~# Y# r! @9 b 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