[ARX程序]：如何构造带有圆弧的AcDb3dPolyline实体?

chxmhsd

多线段的AcDb3dPolyline 只需有顶点的AcGePoint3dArray就可以了。但是对于有圆弧及线段的3d实体,就不知道如何构成了。
如何将AcGeCompositeCurve3d转化为AcDb3dPolyline?

XDSoft

最初由 chxmhsd 发布
[B]多线段的AcDb3dPolyline 只需有顶点的AcGePoint3dArray就可以了。但是对于有圆弧及线段的3d实体,就不知道如何构成了。
如何将AcGeCompositeCurve3d转化为AcDb3dPolyline? [/B]

可以用AcGeCompositeCurve3d::getCurveList(...)

你可以用AcGeCompositeCurve2d 搜索论坛，论坛提供过AcGeCompositeCurve2d到AcDbPolyline的转换，可以借鉴。

2. [font=courier new]
   
3. AcGeCompositeCurve3d::getCurveList Function void
   
4. 
   
5. getCurveList(
   
6. 
   
7. AcGeVoidPointerArray& curveList) const;
   
8. 
   
9. curveList Input list of curves in the composite curve
   
10. 
    
11. Returns the list of pointers to the component curves which make up the composite. The curves in curveList are not deleted when the composite is deleted
    
12. [/font]

[font=courier new]<br /> AcGeCompositeCurve3d::getCurveList Function void<br /> <br /> getCurveList(<br /> <br /> AcGeVoidPointerArray& curveList) const;<br /> <br /> curveList Input list of curves in the composite curve <br /> <br /> Returns the list of pointers to the component curves which make up the composite. The curves in curveList are not deleted when the composite is deleted<br /> [/font]

chxmhsd

之前，我看过这个贴子。
AcDbPolyline的函数Acad::ErrorStatus
addVertexAt(
    unsigned int index,
    const AcGePoint2d& pt,
    double bulge = 0.0,
    double startWidth = -1.0,

    double endWidth = -1.0);
而AcDb3dPolyline对应的函数
Acad::ErrorStatus
insertVertexAt(

    AcDbObjectId& newVertId,
    const AcDbObjectId& indexVertId,

    AcDb3dPolylineVertex* pNewVertex);
似乎无法描述带有圆弧性质的顶点。
其中

AcDb3dPolylineVertex的构造为
AcDb3dPolylineVertex(

    const AcGePoint3d& position);

position        Input the WCS position point for the vertex

Constructs an AcDb3DPolylineVertex that uses position as the position point. The vertex type is initialized to AcDb::k3dSimpleVertex.

XDSoft

最初由 chxmhsd 发布
[B]之前，我看过这个贴子。
AcDbPolyline的函数Acad::ErrorStatus
addVertexAt(
    unsigned int index,
    const AcGePoint2d& pt,
    double bulge = 0.0,
    double startWidth = -1.0,

    double end... [/B]

3DPOLY对象规定了本身不包括弧线段、并且没有线宽，是连续的空间直线组成。

所以你添加不了弧段。

guo220

那如果我要做带圆弧的三维实体应该怎么做

oyxx_1023

没人顶了，我也想知道答案