Sometimes what you need to draw requires some computation by steps. For example if you want to draw particles following a flow field, or want to use positions obtained from another kind of simulation. Saving a frame at each step doesn’t give you a lot of control. This tutorial is about a basic technique to tackle this problem. For some people, no need to read this tutorial if this is clear to you: this is about doing linear interpolation on a list of values to get a continuous function.
