Don Slater Wanda Dann Motion and Rotation Copyright 2012 Wanda Dann, Don Slater All rights reserved
3 Dimensional Space An Alice object o Is located in a 3D world, positioned at (x, y, z) o has 3 dimensions o height, width, depth o can move in 6 directions up right forward down left back Copyright 2012 Wanda Dann, Don Slater All rights reserved
An object’s center is its pivot point (around which it moves and rotates). The center of an object is usually where it stands on the ground Center center Copyright 2012 Wanda Dann, Don Slater All rights reserved
Location An object’s location is where the center point of an object is located, relative to the ground’s origin (x,y,z) (19, 15, -20) (0, 0, 0) Center of the world (origin) Copyright 2012 Wanda Dann, Don Slater All rights reserved
Orientation Orientation is an object’s o sense of its own forward and up direction Copyright 2012 Wanda Dann, Don Slater All rights reserved Up Forward
Translational motion changes the location of an object in the world The direction of translational motion is stated relative to the orientation of the object. ◦ Six possible directions move left right up down forward backward forward right up back Copyright 2012 Wanda Dann, Don Slater All rights reserved
Rotational motion changes the orientation of an object in the world There is no change of location of the object An object’s center acts as its pivot point for rotation. Two forms of rotational motion: turn forward, backward left, right roll left, right Copyright 2012 Wanda Dann, Don Slater All rights reserved