What ways are there of drawing 3D trees using Java and OpenGL?

Question

I know how to draw basic objects using JOGL or LWJGL to connect to OpenGL. What I would like is something that can generate some kind of geometry for trees, similar to what SpeedTree is famous for. Obviously I don't expect the same quality as SpeedTree.

I want the trees to not look repetitive. Speed is not a concern, I do not expect to need more than 100 trees on screen at one time.

Are there free tree-drawing libraries available in Java? Or sample code or demos? Is there anything in other languages which I could port or learn from?

Answer 1

http://arbaro.sourceforge.net/

http://www.propro.ru/go/Wshop/povtree/povtree.html

Non java: http://www.aust-manufaktur.de/austt.html