can i add this？

[Tomikes]

http://e.hiphotos.baidu.com/zhidao/pic/item/0eb30f2442a7d9336cb79238af4bd11373f00159.jpg

I want to circle line on the graph into a square and a triangle ，for example, the shape of the above picture on the right, how to do it , the great God？

[liuxuan30]

The library does not support yet, but you could contribute, search darwCircles in line chart renderer, and then you can add more shape following the same pattern.