Compuer Animation(Postgraduate Course): Lecture 4:Keyframe interpolation and velocity control
Welcome file Lecture 4: Keyframe interpolation and velocity control 动画中的运动感控制 ： 运动的表示： 用数学方法来表示各类物体的运动 运动的控制和编辑： 给动画师提供能够表达他意图的方便、直观的控制工具 运动的生成： 计算每一帧所需的各种运动参数 Goal：再现物理世界的运动，超越物理世界的运行。 I.Interpolation between key frames 1. Parameters to be interpolated : Position of an object Scale of an object Orientation of an object Joint angle between two joints Color attribute of an object 2. Interpolation between frames is not trivial : Appropriate interpolation function Parameterization of the function Maintain the desired control of the interpolated values over time 3. Solution : Generate a space curve Distribute points evenly along curve Speed control: vary points 4. Interpolation v.s. Approximation : An interpolating spline in which the spline passes through the interior control points. An approximating spline in which only the endpoints are interpolated; the interior control points are used only to design th...