[ARX函数]：问一个较难的问题。。。。。。

lzxlzx

如何求闭合pline线的最大内接园？

temp_go

形心是圆点，至于半径嘛,遍历求最近的点。

lzxlzx

如何求形心？？？？？

LoveArx

最初由 lzxlzx 发布
[B]如何求形心？？？？？ [/B]

使用：AcDbRegion::createFromCurves 从封闭的POLYLINE创建一个临时的“面域”实体，然后利用：AcDbRegion::getAreaProp

2. 
   
3. AcDbRegion::getAreaProp Function virtual Acad::ErrorStatus
   
4. 
   
5. getAreaProp(
   
6. 
   
7. const AcGePoint3d& origin,
   
8. 
   
9. const AcGeVector3d& xAxis,
   
10. 
    
11. const AcGeVector3d& yAxis,
    
12. 
    
13. double& perimeter,
    
14. 
    
15. double& area,
    
16. 
    
17. AcGePoint2d& centroid,
    
18. 
    
19. double momInertia[2],
    
20. 
    
21. double& prodInertia,
    
22. 
    
23. double prinMoments[2],
    
24. 
    
25. AcGeVector2d prinAxes[2],
    
26. 
    
27. double radiiGyration[2],
    
28. 
    
29. AcGePoint2d& extentsLow,
    
30. 
    
31. AcGePoint2d& extentsHigh) const;
    
32. 
    
33. origin Input origin of the region
    
34. xAxis Input X axis of the region
    
35. yAxis Input Y axis of the region
    
36. perimeter Returns perimeter of the region
    
37. area Returns area of the region
    
38. centroid Returns centroid of the region
    
39. momInertia[2] Returns moment of inertia of the region
    
40. prodInertia Returns product of inertia of the region
    
41. prinMoments[2] Returns principal moments of the region
    
42. prinAxes[2] Returns principle axes of the region
    
43. radiiGyration[2] Returns radii of gyration of the region
    
44. extentsLow Returns minimum extents point of the region
    
45. extentsHigh Returns maximum extents point of the region
    

<br /> AcDbRegion::getAreaProp Function virtual Acad::ErrorStatus<br /> <br /> getAreaProp(<br /> <br /> const AcGePoint3d& origin,<br /> <br /> const AcGeVector3d& xAxis,<br /> <br /> const AcGeVector3d& yAxis,<br /> <br /> double& perimeter,<br /> <br /> double& area,<br /> <br /> AcGePoint2d& centroid,<br /> <br /> double momInertia[2],<br /> <br /> double& prodInertia,<br /> <br /> double prinMoments[2],<br /> <br /> AcGeVector2d prinAxes[2],<br /> <br /> double radiiGyration[2],<br /> <br /> AcGePoint2d& extentsLow,<br /> <br /> AcGePoint2d& extentsHigh) const;<br /> <br /> origin Input origin of the region <br /> xAxis Input X axis of the region <br /> yAxis Input Y axis of the region <br /> perimeter Returns perimeter of the region <br /> area Returns area of the region <br /> centroid Returns centroid of the region <br /> momInertia[2] Returns moment of inertia of the region <br /> prodInertia Returns product of inertia of the region <br /> prinMoments[2] Returns principal moments of the region <br /> prinAxes[2] Returns principle axes of the region <br /> radiiGyration[2] Returns radii of gyration of the region <br /> extentsLow Returns minimum extents point of the region <br /> extentsHigh Returns maximum extents point of the region <br />

就可以获得你需要的“型心”。