[Design] Find a best way to represent and draw NodeShape

[ZhangMenghe]

In Zugzwang's work, contents in nodeshape folder just limit every single shape inside a rectangle.
In this way, define (xMin, xMax, yMin,yMax) as the border.
So inside the border, use java.awt to draw directly(like canvas for html).

This part should be replaced by drawing with gl4

[ZhangMenghe]

Here is a solution