Leaf movement simulation

This paper presents a method for the animation of leaf movement. Leaves are classified into two classes: moveable and non-moveable. For moveable leaves, their movements consist of two parts: leafstalk rotation and leaf surface rotation. For each rotation, a movement model was constructed and the movement was computed based on each model, respectively. The final leaf movements were obtained by superposition of these two rotations. The method's principle is simple and easy to use.