1. Alice Concepts

2. Overview Follow-up on Appendix A – Getting Started
Classes and Objects in Alice
objects have parts

3. Kinds of Animations
In Appendix A–Getting Started Part 1, you viewed two kinds of animations
Movie
user just watches the animation on screen
"machine-centric"
Interactive
user clicks on mouse, types a key on
keyboard …
"user-centric"

4. Events Animations that are interactive depend on the user's actions
mouse click
key press
others (HeadMountedDevice, etc.)
Actions are events
Interactive programs are event-driven

5. Interactivity in Alice
Another interactive program in Alice
Chap1-InteractiveDemo
What are the events?
What response does the skater make to each event?

6. Objects What is an object ? How is an object identified as unique?
anything that can be identified as unique from other things
How is an object identified as unique?
has a name
has properties:
width, height, color, location, age, ss#, id#
has a purpose:
associated actions it can perform
tasks it can carry out

7. Class Objects are categorized into classes Each object is
an instance of the class.
All objects in a class have similar properties and generally can perform the same tasks.
Person
Dogs
Peter
Mary
Paul
Spike
Scottie
Fluffy

8. Objects in a Virtual World
In Alice, each 3D model is a class of objects
each object of the class has a unique name
mummy, mummy1, mummy2
has color(s)
pink, white, grey, black, blue, ….

9. Object Parts
Objects may be composed of Parts

10. Center At the center of mass Where it stands on the ground
Where it is held

11. Assignment Complete Appendix A – Getting Started, Part 2
Your assignment is to read
Chapter 1-2, Alice Concepts
Tips & Techniques 1, Special Effects

12. Lab
Notes:
Lab exercises and projects require that you demonstrate the code and execution of your programs to the instructor or the TA
Your lab sheet must have the signature of the instructor or TA for each assigned exercise and/or project. Otherwise, you will not get credit for having completed the lab!