[求助]：请问，如何画虚线？

empireman

如何画虚线？

小树袋熊

[PHP]
AcDbEntity::setLayer
virtual Acad::ErrorStatus
setLayer(
    AcDbObjectId newVal,
    Adesk::Boolean doSubents = Adesk::kTrue);

newVal        Input objectId of the AcDbLayerTableRecord to be referenced by the entity
doSubents        Input Boolean indicating whether to propagate the change to any subentities the entity may own
[/PHP]

empireman

谢谢，这个方法我试过了，但是不行呀！

atumuh

我的方法是：
首先，创建一个新层，线形定义为虚线；
然后，在该层中绘直线。

小树袋熊

画虚线要有一个比例，要不然看到的还是一条实线

empireman

行了，谢谢~~~~~

lyousme

怎么设置比例？我怎么还是画不出来，能不能给一个简单的例程

ninuo

void createLineType()
{
        AcDbLinetypeTable *pLinetypeTable;
        acdbCurDwg()->getLinetypeTable(pLinetypeTable,AcDb::kForWrite);
        AcDbLinetypeTableRecord *pLinetypeTableRecord=new AcDbLinetypeTableRecord;
        pLinetypeTableRecord->setName("doshed");
        pLinetypeTableRecord->setNumDashes(4);
        pLinetypeTableRecord->setDashLengthAt(0,1.25);
        pLinetypeTableRecord->setDashLengthAt(1,-.25);
        pLinetypeTableRecord->setDashLengthAt(2,0.25);
        pLinetypeTableRecord->setDashLengthAt(3,-.25);
        pLinetypeTableRecord->setIsScaledToFit(0);//design the mode of align
        pLinetypeTableRecord->setPatternLength(2);//Set the total length of line
        pLinetypeTable->add(pLinetypeTableRecord);
        pLinetypeTable->close();
        pLinetypeTableRecord->close();
}

lyousme

谢谢了，下面是我在坛子里找到的另外一种方法，终于画出来了，拿出来大家分享

1. 
   
2. acdbLoadLineTypeFile("HIDDEN","ACADISO.LIN",acdbHostApplicationServices()->workingDatabase());
   
3. 
   
4. mpPolyline = new AcDbPolyline();
   
5. AcDbObjectId dashdotId;
   
6. if (getLinetypeIdFromString("HIDDEN", dashdotId) == Acad::eOk)
   
7. {
   
8.     mpPolyline->setLinetype(dashdotId);
   
9. }
   
10. 
    
11. Acad::ErrorStatus AsdkPloyJig::getLinetypeIdFromString(CString str, AcDbObjectId &id)
    
12. {
    
13.     Acad::ErrorStatus err;
    
14. 
    
15.     // Get the table of currently loaded linetypes.
    
16.     //
    
17.     AcDbLinetypeTable *pLinetypeTable;
    
18. 
    
19.     err = acdbHostApplicationServices()->workingDatabase()
    
20.         ->getSymbolTable(pLinetypeTable, AcDb::kForRead);
    
21.     if (err != Acad::eOk)
    
22.         {
    
23.                 return err;
    
24.         }
    
25. 
    
26.     // Get the ID of the linetype with the name that
    
27.     // str contains.
    
28.     //
    
29.     err = pLinetypeTable->getAt(str, id, Adesk::kTrue);
    
30. 
    
31.     pLinetypeTable->close();
    
32. 
    
33.     return err;
    
34. }
    
35. 
    

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