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. _4 y' z- S; [5 s2 @$ K0 p1 |( b( S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 );
' \3 I9 y2 `* R// 获得指向块表的指针
5 }" G8 d. B0 h$ |AcDbBlockTable *pBlockTable; acdbHostApplicationServices()->workingDatabase()
) p: E8 Y0 O' I! l1 `2 } W->getBlockTable(pBlockTable, AcDb::kForRead);
' S* s' V' W2 Y( L" `: D+ s8 a// 获得指向特定的块表记录（模型空间）的指针4 y$ ~4 M* c+ D) d4 ]/ }8 d
AcDbBlockTableRecord *pBlockTableRecord;, K+ w O+ j6 S& b" u
pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);1 }- u/ M; [" \; y, @/ m4 P
// 将AcDbLine类的对象添加到块表记录中
6 O9 o0 ?% S, o% CAcDbObjectId lineId;
3 \2 J g0 D+ v- B7 {$ [pBlockTableRecord->appendAcDbEntity(lineId, pLine);
3 S1 {3 s# W3 S4 P// 关闭图形数据库的各种对象, x* M- B- |8 s
pBlockTable->close();
7 K) p$ Z0 t: Q2 c- @6 [pBlockTableRecord->close();
( [4 x* x2 ^% cpLine->close();
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% T- P6 x- E# G9 F, H* R多线段：
7 m3 r+ Z/ M) wvoid CreatePolyline(AcGePoint2dArray points ,double width)
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int numVertices = points.length();3 J. r' _) v( ]& p9 U8 S' X+ Y
AcDbPolyline *pPoly = new AcDbPolyline(numVertices);
4 ]; I2 q3 e9 t! N+ y6 \% U- \for (int i = 0; i < numVertices; i++)- Y" S& n3 Q9 M* V
{
5 P) E$ B. L$ q5 I* ^3 Y: apPoly->addVertexAt(i, points.at(i), 0, width, width);' @: Q! ^8 g P
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AcDbObjectId polyId;9 p3 K( N5 y5 h5 V- }' ^! p/ Y
polyId = PostToModelSpace(pPoly);9 g1 e9 q+ B& U: d. N
// return polyId;
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6 j2 a6 h, H# q0 t6 Bstatic AcDbObjectId PostToModelSpace(AcDbEntity* pEnt)% H# U! D8 Q2 x9 \- o
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AcDbBlockTable *pBlockTable;& M$ W8 C7 M) T
acdbHostApplicationServices()->workingDatabase() ->getBlockTable(pBlockTable, AcDb::kForRead);* X1 T+ {+ l. l7 J
AcDbBlockTableRecord *pBlockTableRecord;, A* Y7 M; ^& F4 }" G% V7 w
pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
+ w& t( y9 N0 G" [/ h/ Q: o9 BAcDbObjectId entId;
- V" ?0 I" R- X0 j( @pBlockTableRecord->appendAcDbEntity(entId, pEnt);$ w) [1 U/ M" ], c, Z' M1 m! U" C
pBlockTable->close();4 t* O4 @, @+ ?7 X) i, [ L7 n
pBlockTableRecord->close();- B0 m6 ]# Q2 X
pEnt->close();
7 N+ C0 v- ~4 J5 \1 d) Ereturn entId; } ; E# F9 d8 h5 {7 x$ P( n1 X( d
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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发表于 2013-12-9 17:00:54