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: \ b* T6 J+ g9 ^% ^( t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)
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AcDbLine * pLine = new AcDbLine( ptStart , ptEnd );( O! m; I9 ?* f1 U
// 获得指向块表的指针
5 u& @5 ?8 L% ?+ }AcDbBlockTable *pBlockTable; acdbHostApplicationServices()->workingDatabase()
`- w& l% o) Q% f->getBlockTable(pBlockTable, AcDb::kForRead);
% q2 L6 p8 F: z2 y L" t// 获得指向特定的块表记录（模型空间）的指针
+ u: f& O b* ^3 e6 v! }* U2 X, ~AcDbBlockTableRecord *pBlockTableRecord;
3 ^( V* i ]+ D" Q& GpBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
3 d! O8 r" ?9 S// 将AcDbLine类的对象添加到块表记录中
* |" e: } D0 I( G; E) ZAcDbObjectId lineId;1 K! p$ h- t" j; h( `2 Y/ l
pBlockTableRecord->appendAcDbEntity(lineId, pLine);) e& }, L _; t: {0 O* H# _+ S* c. @
// 关闭图形数据库的各种对象1 M5 q1 i9 [+ m5 k1 J4 ?
pBlockTable->close();
( z0 c( h0 K5 ^2 v4 I/ ]pBlockTableRecord->close();
* h" |6 A# Y! Y# A+ k4 NpLine->close();1 `" @' x7 U2 Y1 }) z. x" b
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多线段：
' c& W( K& `) U! H$ s x, Vvoid CreatePolyline(AcGePoint2dArray points ,double width) _8 E, j3 Q$ D# L- Z) K9 r0 b
{
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AcDbPolyline *pPoly = new AcDbPolyline(numVertices);
: ?6 \, Q: V/ }% hfor (int i = 0; i < numVertices; i++)
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pPoly->addVertexAt(i, points.at(i), 0, width, width);9 ]* C& j( X! D2 c; U; g0 [
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AcDbObjectId polyId;
1 Q: K) `( ^6 V5 v; N; OpolyId = PostToModelSpace(pPoly);: p i& @4 m6 f7 L9 Q; ]0 j/ ~3 y
// return polyId;
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static AcDbObjectId PostToModelSpace(AcDbEntity* pEnt)* z$ g+ Q6 b8 l
{
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acdbHostApplicationServices()->workingDatabase() ->getBlockTable(pBlockTable, AcDb::kForRead);
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pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
) v. ~' |- o+ L5 u% ]AcDbObjectId entId;
9 N$ H% j6 m2 ?7 R2 r5 tpBlockTableRecord->appendAcDbEntity(entId, pEnt);8 d: Z- c8 O6 V/ F: h" I) h" G
pBlockTable->close();/ ?! m; N6 R P5 y \# n! ^: F
pBlockTableRecord->close();- v3 Z' |0 w( u( r: V( U
pEnt->close();, k( d# P' Z9 U2 ^3 @9 z
return entId; } 9 P5 H `2 H2 j+ l- 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, s) h7 A0 h- \8 a! }+ I" s
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发表于 2013-12-9 17:00:54