【ARX 一步一步开发CAD】01-新建图层

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//打开图层表，打开方式为只写
+ _3 t1 ?9 P* uAcDbLayerTable * pLayerTable;
acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pLayerTable,AcDb::kForWrite);

//初始化层表记录对象，并设定图层名称“NewLayer”
8 d6 r3 `3 s9 f* B5 kAcDbLayerTableRecord * pLayerTableRecord = new AcDbLayerTableRecord;
& L% i& e7 K. B4 B$ `, spLayerTableRecord->setName(L”NewLayer”);

//图层的其他属性（例如颜色、线形等）都用默认值
- Y; w% k+ P, |" L4 X4 {9 l//将新建的图层表记录添加到图层表中，并将图层表记录的ID
+ ^( x7 q; U0 M9 B/ L/ T0 c- b% O//保存到pLayerId中，作为函数的返回值
AcCmColor color; // AcCmColor是ACAD颜色管理类
# O7 d" s5 \1 ycolor.setColorIndex(1); //红色
) G( C' u& c. m7 u9 i& [(color.setRGB (0,0,0)
9 C0 {' S8 A& x. y7 l8 P( m! [* ZpLayerTableRecord->setColor(color);
AcDbObjectId pLayerId;
pLayerTable->add(pLayerId,pLayerTableRecord);
pLayerTable->close();
: X3 T' x( c9 Y1 @pLayerTableRecord->close();

示例：创建两个图层：
- g5 O/ t' ]( G+ G% Z2 n//打开图层表，打开方式为只写
AcDbLayerTable * pLayerTable;
# u; |3 k# @0 o" d: [2 _AcDbLayerTableRecord * pLayerTableRecord ;
- u/ T; o+ N8 H& gAcCmColor color;// AcCmColor是ACAD颜色管理类
, V$ n: k' X  P/ z' _  e% A- CAcDbObjectId pLayerId;
& q5 D& h! F# qacdbHostApplicationServices()->workingDatabase()->getSymbolTable(pLayerTable,AcDb::kForWrite);
1 ?( j9 U1 c* h( Z& Q//初始化层表记录对象，并设定图层名称“结-1”
pLayerTableRecord = new AcDbLayerTableRecord;
pLayerTableRecord->setName(_T(“结-1″));
9 q( H! j5 k- H  w6 F5 Ucolor.setColorIndex(5);
+ }8 ~% Q* V4 W+ v1 _" r" IpLayerTableRecord->setColor(color);
pLayerTable->add(pLayerId,pLayerTableRecord);
pLayerTableRecord->close();
//设定图层名称“结-2”
# v8 G5 }; Z" r* y! T& _# ~pLayerTableRecord = new AcDbLayerTableRecord;
* J$ Q. t# ^# y& N1 {& z0 opLayerTableRecord->setName(_T(“结-2″));
* p9 @# y/ {) K) Wcolor.setColorIndex(1);
pLayerTableRecord->setColor(color);
. M- V+ o  A3 |  \pLayerTable->add(pLayerId,pLayerTableRecord);
- k4 H) x; L$ a6 r! X, K# V9 npLayerTableRecord->close();
' a% Q0 D# m9 g) O* x3 bpLayerTable->close();

" X& A* y0 l3 s* f! j参考：http://www.colinchou.com/archives/236
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