   how to create a tree?
  I read several post about tree's generation, unluckly, I dont know how to create a tree on which I will used to simulate the wind effect.  I know the fractal method to create trees but how to create the leaves? Is there any example code or material?  Thank you!   
L-Systems are commonly used for such things.;  Thank you,DarkPsychosis.I am familiar with L-system and know how to create the production rules to produce a tree. My problem is: should I have to write one parser to parse the production rules to create a tree myself?   ;  If there exist some example of tree, it will be great helpful. Will someone provice it for me? thank you.   