一种基于动作学习的2D形状动画制作方法

2D Shape Animation Based on Motion Learning

为了创建生动逼真的2D形状动画,提出了一种新的从现实角色到虚拟角色的动作学习方法。该方法首先将源角色的骨骼状态转化为基于关节点的旋转角数据,然后将源角色的旋转角数据迁移至目标角色,最后根据目标角色的关节点旋转角,依次计算关节点的位置,从而最终获得角色姿态;虚拟角色通过同步学习获得源角色的动作骨骼状态和动作发生时间,从而使得目标角色获得与源角色相同的动作姿势,并具备相同的发生时间;通过关联关节点旋转角度的积累,解决不同拓扑结构角色之间的动作共用问题。该动态学习方法可以应用于快速卡通设计及模型之间进行动作设置,实验证明该方法在模拟真实动作方面是可行和有效的,可提高2D虚拟角色动画制作时的便捷性和动作真实性。

To create the vivid motions for 2D shape character, a new motion learning method from actual roles to virtual roles was proposed. The posture of the motion of the source roles were transformed into the rotation angle of joint points. The rotation angles were transferred from source roles to the virtual target roles. The final posture of the virtual roles was obtained via calculating the position of joint-points according to the angles. The virtual role can obtain the same skeleton status at the same time from the actual source role. The accumulation of continuous joint points can be used as the virtual skeleton. And the motion learning can be achieved between the roles with different topology because of the accumulation. The method can be used to the design of cartoon or the motion of the model. Experimental results prove that the method is feasible and valid. The stiffmotion in animation can be decreased by the motion learning.