Chapter 4: Display
4-10: 3D Windows
4-10-3: Behaviors and Animation

Behaviors are controls that affect the 3D display. In Electric, there are 3 types of behaviors available.
  1. Orbit Behavior combines three basic mouse behaviors: zoom, pan and rotate. The left button rotates, the right button pans, and the middle button zooms. Click and drag to alter the display.
  2. 3D Axis Behavior available when the 3D axis is shown. Clicking on the axis affects rotation (but not panning or zooming). This axis is not part of the standard Electric distribution and must be installed separately (see Section 1-5).
  3. Navigator Behavior controlled by special keys. Use the up/down/left/right arrow keys as shown in the table.
Effect Positive Negative
Move along Z axis UP Arrow DOWN Arrow
Move along Y axis CTRL + UP Arrow CTRL + DOWN Arrow
Move along X axis ALT + RIGHT Arrow ALT + LEFT Arrow
Rotate along Y axis LEFT Arrow RIGHT Arrow
Rotate along Z axis CTRL + LEFT Arrow CTRL + RIGHT Arrow
Rotate along X axis ALT + UP Arrow ALT + DOWN Arrow


A 3D display can be animated by creating "key frames" along a time line. Interpolators examine the key frames and smoothly animate the 3D view. There are two types of interpolators: simple and path. Simple interpolators have a start and end frame, varying the view between them linearly. Path interpolators allow multiple key frames to combine into a single smooth animation.

Spline interpolators can be created and controlled with the Capture Frame/Animate command (in menu Window / 3D Window). To animate, you must create a sequence of key frames that define the view changes. Each key frame represents a different 3D view of the scene.
Figure 4.18

To control the animation, make changes to the display and click "Enter Frame". You can enter as many frames as you want and animate them later. The animated sequence is a "demo" that can be saved to disk and restored later for playback. A QuickTime movie can be created by using the "Create Movie" button. For this option, the JMF plugin must be available (see Section 1-5).

There is a built-in demo of animation, available in the Help / 3D Showcase menu. First, use the Load Library command to load the demo library. Next, use the 3D View of Cage Cell command to start the 3D viewer on the cage cell (used on the cover page of this manual). Finally, use the Animate Cage Cell command to start an animation demo on the 3D view of the cage cell.

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