Chapter 21 Cameras, Walkthroughs, and Flybys 557 Copyright Goodheart-Willcox Co., Inc. Camera Tools The expanded View panel on the Home tab of the ribbon contains some tools for quickly adjusting the camera before starting the animation. See Figure 21-7. The Lens Length slider controls how much of the scene is seen by the camera. The lens length refers to the focal length of the camera lens. The higher the number, the closer you are to the subject. The range is from about 1 to 100,000 50 is a good starting point. There are stops on the slider for standard lens lengths. You can enter a specifi c value for the lens length or fi eld of view by selecting the text in the slider, typing the value, and pressing [Enter]. Below the Lens Length slider are text boxes for the camera and target positions. These can be used to change the X, Y, and Z coordinates of the camera or target before starting the animation. NOTE NOTE The view of the current viewport is changed when using the camera tools in the expanded View panel on the Home tab of the ribbon. If you change the current view and want to save it for future use, save it as a new view. Animation Tools The Animations panel on the Visualize tab of the ribbon contains the tools for controlling the recording and playback of the animation. See Figure 21-8. Remember, this panel may not be displayed by default. The Record Animation button is used to initiate recording of camera movement. After the 3DWALK or 3DFLY command is acti- vated, pick the button to start recording. Make sure that you are ready to start moving when you pick the button because recording starts as soon as it is picked. Lens length Camera position Target position Figure 21-7. Camera tools are located in the expanded View panel on the Home tab of the ribbon. Figure 21-8. The Animations panel on the Visualize tab of the ribbon is where you can record and play back the walkthrough or flyby animation. This panel may not be displayed by default. Play Pause animation Start recording animation Save