1. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 1 Lesson 1: Introduction to Pong

2. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 2 Pong Computer ping-pong without a net First video-game in history –Invented by Ralph Baer –First commercialized in 1972 –Originally implemented on an oscilloscope –Home Pong machines were made for the TV, but could only play Pong

3. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 3 Goal You will be designing and implementing a Pong game You will use object-oriented design

4. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 4 Discover Pong Find Pong on-line, example: www.addictinggames.com/pong.html www.addictinggames.com/pong.html Play Pong After you play it for a few minutes, fill out distributed worksheet Pong Questionnaire

5. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 5 Pong Objects What objects did you see? What state information (attributes) does each object have? What differentiates similar objects (such as the paddles) from each other?

6. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 6 The Pong Object What is the purpose of the actual Pong playing field itself? Why do we need Pong? What information (attributes) does it need?

7. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 7 The State of Objects Each object is built from a class A class is only a pattern, and cannot have state An object exhibits behaviors and state What are the state properties of each object?

8. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 8 Pong Classes What classes do we need to implement Pong? What attributes (state information) does each class have?

9. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 9 Pong Classes ClassAttributes Ballposition, velocity, size Paddleposition, size Pongsize, borders, keyPresses

10. This computer science resource was developed through a collaboration between IBM Corporation and CSTA. 10 Lesson 1 Homework What behaviors (methods) does each class display?