CIS 3100 Introduction to Programming Using Virtual Reality

Reporting errors will help to improve future versions

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Human Computer Interaction Lab at Carnegie Mellon University. Reporting errors will help to improve future versions of Alice, and in some cases a member of the team may contact you directly. You may also submit bugs and suggestions about Alice through the Alice web site. They want to hear from the users of Alice – they really do (honest). Tutorial 1 B — Playing an Alice World In this tutorial you will experiment with playing an Alice World. Alice worlds fit into two different categories – some Alice worlds are interactive the way a video game is, while others are simply run and viewed like a video tape. In either case, experienced Alice users refer to “playing” an Alice world the way most software developers talk about “running” a computer program. The Alice world that you will play in this tutorial is the lakeSkater world used in Tutorial 1A, above. It is not an interactive world, but is more like watching a video of an ice skater’s performance. If you have just finished Tutorial 1A and still have the lakeSkater world open, then continue with the steps below. If you do not have the lakeSkater world open, then before starting this tutorial you need to run the Alice software and open the lakeSkater example world. The lakeskater world can be found on the Examples tab of the Welcome to Alice! dialog box that appears when you start the Alice software.
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Alice – Chapter 1 DRAFT June 10, 2013 pg. 18 of 38 Playing the lakeSkater world ~~~ Steps to Perform ~~~ 1. There are three buttons near the top of the Alice Interface, labeled Play , Undo , and Redo . Undo and Redo are used for editing, as described in Tutorial 1A. The Play button is used to play the current Alice world. When this button is clicked, the world will play in a larger version of the World window, with player controls at the top of the window, as shown in Figure 1-4. Click the Play button now and watch the show unfold. Let the world play through to the end at least once before proceeding. 2. Notice that the new window has a speed slider control and five buttons across the top of the window in which the Alice world plays. The buttons are labeled Pause , Resume , Restart , Stop and Take Picture . 3. The Restart button is used to begin playing the current world again from the beginning. The Pause and Resume buttons work like the pause and play buttons on a VCR or DVD. Click the Restart button now to restart the lakeSkater world and then experiment with the Pause and Resume buttons. 4. The speed slider is used to change the speed of the world while it is playing. Restart the world, and experiment with the speed slider control. Figure 1-4. The World window with the lakeSkater world running.
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Alice – Chapter 1 DRAFT June 10, 2013 pg. 19 of 38 5. The Take Picture button captures an image of the currently playing world and saves it in a data file. Restart the world and click the Take Picture button to take a picture of the world. An Image captured and stored dialog box will appear, showing you the full path name of the file that was saved. The stored image file can be viewed and used as any other computer image file can be.
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