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# Math meets artistry

## Want to join the conversation?

• Is it true that animating a character is costy? I read a theory that states in Toy Story Andy didn't have a dad because it was too costy to animate one. Is that true? and if so, then how much does it cost to animate a person or a thing? and what makes it that costy in the first place?
• Animating takes a lot of time and effort, which leads to cost.
• I was just wondering.... Is the spline (I'm not sure it is spelled right) the key to making an animation?
• Not necessarily, but yes... most of the time... sort of. The spline bit is the key to easily relating arbitrary frames with a continuous mathematical function, which is key only because we are lazy. You could always do the in between frames yourself, but with out letting mathematics do a lot of the work it would likely look sloppy. A spline is a way to generate a function from any set of points, so the animator can say I want the object to be here at this point in time, and I want it to be over here at this other point in time, and I want to use this spline for all the path and viola the computer knows how to make a smooth path in between. I actually first learned about splines from an engineering class, so they are useful for all kinds of things not just animation. For example over on the javascript + processing.js part you can make a bezier curve just by specifying a few control points. This is probably handled under the hood by a spline. Here is some more reading: https://en.wikipedia.org/wiki/Spline_%28mathematics%29
• What software do you guys use?
• why is the color green?
• Does animation rely on Math all the time?
• Yes. 3D animation is based entirely on maths. Of course, you do not have to be THE best at math to do animation, but it could certainly help
• I see a lot of comments asking questions about a "spline" and I wanted to know what it was.
• who invention animation?
• I don't get it. How do you Animate? I still don't understand.