Example-based motion generation of falling leaf

In this paper, we present an algorithm which can be used to produce stylized and expressive falling leaves animation. In this algorithm, leaf's falling motion is divided into two factors: movement trajectory and leaf's posture on each point of the trajectory, which is accord with creation idea of animation artist. We describe the example leaf's non-rigid posture changes by using combination of affine transformation and key-shape interpolation. By example-based trajectory synthesis of falling leaf and transferring example leaf's posture information to new leaf, we can produce a new falling leaf animation with appearance and movement trend suitable for user's requirement with the movement details and postures of example animation. This method can realize the style reuse from classical animations. Furthermore, it can improve the efficiency of effective production.