【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
AcDbLayerTable * pLayerTable;
' z; _& ?6 S+ Z( L# [8 JacdbHostApplicationServices()->workingDatabase()->getSymbolTable(pLayerTable,AcDb::kForWrite);

//初始化层表记录对象，并设定图层名称“NewLayer”
% n) [' s7 U. m: {6 L, C1 N1 UAcDbLayerTableRecord * pLayerTableRecord = new AcDbLayerTableRecord;
6 l, \! U% L) D6 U* e7 F' s6 `6 ypLayerTableRecord->setName(L”NewLayer”);

//图层的其他属性（例如颜色、线形等）都用默认值
//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
* t2 z( v7 D0 c) ]1 N//保存到pLayerId中，作为函数的返回值
8 H. z0 u% \+ w( g8 UAcCmColor color; // AcCmColor是ACAD颜色管理类
color.setColorIndex(1); //红色
(color.setRGB (0,0,0)
7 a. ]9 d4 ^* r! x# opLayerTableRecord->setColor(color);
8 `4 J% \9 o/ x2 F0 T3 |" q' i/ EAcDbObjectId pLayerId;
1 h0 D0 {8 H( W/ |pLayerTable->add(pLayerId,pLayerTableRecord);
7 ^3 C9 v" m" b* k$ HpLayerTable->close();
7 g' I5 B, J, f3 MpLayerTableRecord->close();

示例：创建两个图层：
; K- \% y* e8 Q0 P  q//打开图层表，打开方式为只写
' j" l. Y5 t9 i- `6 B( BAcDbLayerTable * pLayerTable;
, k2 ~7 R1 y  ?  v7 fAcDbLayerTableRecord * pLayerTableRecord ;
AcCmColor color;// AcCmColor是ACAD颜色管理类
/ {/ p$ A" L) Q- {3 _3 V4 H2 TAcDbObjectId pLayerId;
acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pLayerTable,AcDb::kForWrite);
//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″));
2 M. y1 r0 t+ M& z6 r% Vcolor.setColorIndex(5);
2 N9 R2 s$ I' t+ h/ A& I. ~pLayerTableRecord->setColor(color);
* }4 u% A/ e/ P: xpLayerTable->add(pLayerId,pLayerTableRecord);
pLayerTableRecord->close();
* Z5 M6 b7 k2 b0 z, Y1 k$ h8 e9 D//设定图层名称“结-2”
pLayerTableRecord = new AcDbLayerTableRecord;
pLayerTableRecord->setName(_T(“结-2″));
, }$ j9 e7 {" P5 {color.setColorIndex(1);
3 Y( p. Z  U1 b+ G0 h! x- H2 l6 [pLayerTableRecord->setColor(color);
' b, k' f! H7 J+ C+ opLayerTable->add(pLayerId,pLayerTableRecord);
pLayerTableRecord->close();
pLayerTable->close();

* G$ m" Z6 B7 X+ t6 C: P参考：http://www.colinchou.com/archives/236