CS 390:61-70 Fall 1999 Homework 7 -- Virtual Pests, Part III Due Date: Tuesday, Nov. 30 in class

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PURPOSE:

This is the final part of a three-part assignment. The requirements for the were for you to design a virtual pest and its behavior. The requirements for the were for you to implement the user interface and design the structure for the software that implements the behavior. The final part is to add the described behavior using JavaScript functions and statements.

THE ASSIGNMENT:

Using the table of behaviors you specified in Parts I-II as a guide, complete your virtual pest by translating these to the appropriate JavaScript commands and testing them for correctness.

Also upload your completed pest to your course website and supply the URL (on your gradesheet).

DETAILS:

As discussed in class, you need to link your form elements to functions so that the values of the form elements may be transferred to the function for processing, then back to the form for display purposes. See the class lecture notes on and for more details on accomplishing this.

A has been provided for your assistance in this regard. Several points are worthy of note:

• The sample pest contains minimal functionality - just enough to illustrate all key points, and not enough to fulfill the requirements for the assignment.
• The sample pest contains functions Init(), ShowState(), Pat(), and Simulate(), which respectively
  1. initialize the pest
  2. update the display to reflect the pest's state
  3. handle the "Pat dog" button click event, and
  4. continues cycling through states according to the pest design.
• The script is heavily commented to explain the way the functions work and interact.
• The pest's HTML form contains a text box named "state" that shows the pest's state at all times. Normally, after testing, this would be hidden. Follow the directions in the comments to hide this text box (DO NOT REMOVE IT, JUST HIDE IT!!!) when testing is complete.
• The pest's HTML form also contains a text box named "counter" that counts the number of times the Simulate() function has been invoked. This is not needed, but is useful in testing so that it is obvious that updates are still occurring even when no state changes occur (as in when the sample pest is "lonely" and waits for the owner to click the "Pat dog" button.
• Follow the directions in the comments to hide this text box (DO NOT REMOVE IT, JUST HIDE IT!!!) when testing is complete.
• The sample pest also shows the original finite state machine and behavior table. This is for illustrative purposes only - your pest should not include these here.

You should upload your virtual pest to your website and provide its URL on your gradesheet.

WHAT TO HAND IN:

• Your cover sheet will be a "grading sheet" created for use with this assignment. Generate a grading sheet, input your own information, save it, and print it out.
• Print out your virtual pest form.
• Print out a written summary of the behaviors you originally specified, and a description of any differences in your final product from your original design.
• Print out a written description of any elements you have included which go beyond the requirements of the assignment, to be considered for bonus points.
• Print out a copy of the HTML/JavaScript source for your virtual pest form.
• ATTACH A DISKETTE CONTAINING YOUR VIRTUAL PEST. INCLUDE YOUR MATERIALS FOR PARTS I AND II ON THIS DISK ALSO.

ACADEMIC HONESTY:

You must do this work yourself. If you need assistance with this aspect of the assignment, see a consultant during consulting hours. You are encouraged to seek any necessary help from other persons regarding how to use your computer and accompanying software, in accordance with the stated course policy.