From the course: Animation Foundations: Fundamentals
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Arcs in animation
When things move in nature, they often don't follow a straight line. Instead they move in arcs. This is because there is rarely one force acting upon an object. As we've seen, when one force acts upon an object it accelerates inline with the force. When two or more forces act upon the object, the object accelerates in multiple directions, causing it to move along an arc. The most classic example of this is an object effected by gravity. Here a rocket takes off and moves in a straight line. When the force of gravity is added, the rocket eventually falls to earth. The straight line motion becomes a curve. Add in other forces such as wind and the shape of the curve changes. A simpler example might be a car making a right turn. In order to do this the car must decellerate along one axis and accelerate along another. When you combine these two motions the car sweeps out an arc as it turns. Arcs can also result from objects being connected. Fruit on a tree blowing in the wind sways along an…
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