Chapter 21 Cameras, Walkthroughs, and Flybys 561 Copyright Goodheart-Willcox Co., Inc. Motion Path Animation Motion Path Animation You may have found it diffi cult to create smooth motion using the keyboard and mouse. Fortunately, AutoCAD provides an easy way to create a nice, smooth animated walkthrough or fl yby. This is done using a motion path. A motion path is simply a straight or curved path along which the camera, target, or both travel during the animation. One method of using a motion path is to link the camera and target to a single path. The camera and its line of sight then follow the path as a train follows tracks. See Figure 21-12. Another option when using a motion path is to link the camera to a single point in the scene and the target to a path. For example, the target can be set to follow a circle or arc. The camera swivels on the point and “looks at” the path as if it is being rotated on a tripod. See Figure 21-13. A third way to use a motion path is to have the camera follow a path, but have the target locked onto a stationary point. This is similar to riding in a vehicle and watching an object of interest on the side of the road. As the vehicle moves, your gaze remains fi xed on the object. See Figure 21-14. A B Figure 21-12. A—The camera and target are linked to the same path (shown in color). B—The camera looks straight ahead as it moves along the path. A B Figure 21-13. A—The camera is linked to a point so it remains stationary. The target is linked to the circle. B—The camera view rotates around the room as if the camera is on a swivel tripod.