(By default the Lattice Object Name is "Lattice". Make the edges of the lattice align with the circumference of the sphere as this will make animation easier. Resize (SKEY) it so it closely surrounds the sphere. Tab back into Object Mode then immediately add a Lattice(SPACE add>Lattice). Set Smooth and Sub-surf on the sphere if desired. It is important to add the objects in top view to keep their Z-Axis aligned upwards. To begin, add a UVSphere (SPACE add>mesh>UVShere) in Top View (NUM7). Doing this without lattice would be a far more complex exercise as a rotating squashed and stretched sphere would look like it was wobbling in space (like having the flat part of a flat tire spin around the tire instead of staying on the bottom, even while the wheel is turning). For example, once we have a ball that bounces how we'd like it, we can later add rotation to the ball so it spins through the air and bounces then, as the bounces decrease, the ball can roll to a halt. It is possible to make a simple bouncing ball animation without using a Lattice object but with the Lattice we can do more than just bounce the ball. With a little effort we can make that boring sphere look alive! Why use a lattice? In particular, the ball must squash and stretch and change speed as it falls, hits the floor, bounces and rises ready to fall again. To be believable, the ball must use some of the most fundamental principles of good animation. It would be easy to just put a sphere on the screen and animate it to move up and down but in all honesty, it would not look like a bouncing ball. Knowledge of IPO curves will prove useful later as we progress to more advanced techniques.
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