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Brian Cannella

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bunny.turn(left, 1/4) Will Make The Bunny Do A 1/4 ... Using The bunny.pointat(helicopter) Will Cause The Screen On The ... The Bunny Is Actually ... – PowerPoint PPT presentation

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Title: Brian Cannella


1
Alice/Python
  • By
  • Brian Cannella
  • Andrew McCaffrey
  • Thomas McConlogue

2
Alice In Python Land
3
Table of Contents
  • Introduction to Alice
  • Creating Simple Worlds
  • Scripting (Python)
  • Demos

4
What Is Alice?
  • Alice is a 3D Interactive Graphics Programming
    Environment for Windows 95/98/NT
  • Alice was constructed by the Stage 3 Research
    Group at Carnegy Mellon University
  • It was originally developed at the University of
    Virginia
  • It was designed to easily make 3D Graphical
    worlds which can be view through a web browser.
    (Web browser viewing requires the Alice plugin)

5
What Is Alice? (cont.)
  • Alice is a scripting language to control 3D
    objects
  • Alice in NOT a 3D modeling program
  • Alice cannot create new 3D object, but it can
    import many different types of 3D objects
  • Alice is based on the Python programming
    Language, Microsofts Direct 3D Library, and
    Microsofts Visual Basic

6
System Requirements
  • Windows 95/98 with DirectX or NT 4.0 with Service
    Pack 3
  • A VGA graphics card capable of high (16 bit) color

7
System Recommendations
  • A Pentium running at 90 Mhz or better
  • Fast VGA graphics. WRAM is better than VRAM which
    is better than DRAM.
  • 16 megs of RAM
  • A Soundblaster-compatible sound card

8
Misc Points
  • You dont need to consider yourself a programmer
    to be able to use Alice.
  • There is a tutorial available on the Alice
    Website (www.alice.org)
  • If you cant find what you are looking for on the
    extensive website there is a support staff to
    answer your questions.
  • Alice has an infinite undo routine built in to
    encourage experimentation

9
Limitations
  • Alice only runs on Windows machines. (It is not
    Mac or Unix compatable.)
  • It does not support OpenGL
  • It currently does not support VRML, but it may in
    the future
  • It does not use java except to interface with web
    browsers

10
Limitations (cont.)
  • Alice does not support POV Ray Files, and has no
    intent to do so. However, the developers would
    encourage an eager person to write a module that
    would.
  • Alice cannot create stand-alone applications
  • Alice cannot create 3D objects.

11
Creating Simple Worlds In Alice
  • How To Create A World In Alice
  • Moving And Using Built-In Objects

12
The Alice Control Panel
  • This is the Alice Control Panel
  • The Different Elements Are Located On The Left
  • The World And The Controls Are Located On The
    Right

13
The Camera Window
  • This Image Is What Alice Opens Up With
  • There Is A Blue Sky
  • There Is A Green Earth

14
Opening A World
  • To Load An Existing World, Just Click Open Under
    File

15
Inserting An Object
  • Select An Object From The List
  • With The Mouse Move The Object Around The World
  • Objects Can Be Rotated By Selecting The Direction
    In The Control Panel

16
Alice Commands
  • If The Mouse Is Not Precise Enough For You Use
    Alice Commands
  • bunny.move(forward, 1) Will Move The Bunny
    Forward One Unit

17
More Alice Movement
  • bunny.move(back, 1) Will Move The Bunny Backwards
  • bunny.move(left, 1) Will Move The Bunny Left
  • All Directions Are Relative

18
The Turn Command
  • bunny.turn(left, 1/4) Will Make The Bunny Do A
    1/4 Revolution To The Left

19
Interaction Between Two Objects
  • Adding A Second Object Is As Easy As Adding The
    First
  • Moving Objects Is The Same For Objects Of
    Different Types

20
The PointAt Command
  • Using The bunny.pointat(helicopter) Will Cause
    The Screen On The Right To Occur
  • The Rabbit Is Now Facing The Helicopter

21
Parts Of Objects
  • The Bunny Is Actually Not One Object
  • The Bunny Is Made Up Of Bunny.Drum, Bunny.Head
    and Bunny.Body
  • These Parts Can Operate Independent Of Each Other

22
Manipulating Parts
  • bunny.head.pointat(helicopter) Will Cause Only
    The Head Of The Bunny To Turn And Face The
    Helicopter

23
Undo Is Your Friend
  • The Undo Command Fixes Your Boneheaded Mistakes

24
Summary Of World Creation
  • Commands Follow A Pattern Of object.command(detail
    , detail)
  • Example
  • object.move(direction, distance)
  • object.turn(direction, revolutions)
  • object.pointat(another_object)

25
Summary Of Direction
  • Objects Can Move In Six Directions
  • forward
  • back
  • left
  • right
  • up
  • down

26
Summary Of Turn
  • Objects Can Turn Four Ways
  • Forward
  • Back
  • Left
  • Right

27
Using the Script Tab
  • Use this to create more advanced worlds
  • Use to run blocks of code, instead of single line
    code.

28
Making Barney Move
  • A short program to show the use of the Script tab
    in Alice

29
Running Barney
  • Hyperlink to Barney

30
Code to Barney Program
  • lookleft DoTogether (
  • purpledinosaur.rightarm.turn(back,.1),
  • purpledinosaur.leftarm.turn(forward,.05),
  • purpledinosaur.head.turn(left,.07),
  • purpledinosaur.rightleg.turn(back,.1),
  • purpledinosaur.rightleg.foot.turn(right,.2),
  • purpledinosaur.tail.turn(left,.05),
  • purpledinosaur.head.righteye.turn(up,.15),
  • purpledinosaur.head.lefteye.turn(up,.15)
  • )
  • centerfromleft DoTogether (
  • purpledinosaur.rightarm.turn(forward,.1),
  • purpledinosaur.leftarm.turn(back, .05),
  • purpledinosaur.head.turn(right,.07),
  • purpledinosaur.rightleg.foot.turn(left,.2),
  • purpledinosaur.rightleg.turn(forward,.1),
  • purpledinosaur.tail.turn(right,.05),
  • purpledinosaur.head.righteye.turn(down,.15),
  • purpledinosaur.head.lefteye.turn(down,.15)
  • lookright DoTogether (
  • purpledinosaur.rightarm.turn(forward,.05),
  • purpledinosaur.leftarm.turn(back, .1),
  • purpledinosaur.head.turn(right,.07),
  • purpledinosaur.leftleg.turn(back,.1),
  • purpledinosaur.leftleg.foot.turn(left,.2),
  • purpledinosaur.tail.turn(right,.1),
  • purpledinosaur.head.righteye.turn(left,.1),
  • purpledinosaur.head.lefteye.turn(left,.1)
  • )
  • centerfromright DoTogether (
  • purpledinosaur.rightarm.turn(back,.05),
  • purpledinosaur.leftarm.turn(forward, .1),
  • purpledinosaur.head.turn(left,.07),
  • purpledinosaur.leftleg.foot.turn(right,.2),
  • purpledinosaur.leftleg.turn(forward,.1),
  • purpledinosaur.tail.turn(left,.1),
  • purpledinosaur.head.righteye.turn(right,.1),

31
Code To Barney Program
  • dance DoInOrder(
  • lookleft,
  • centerfromleft,
  • lookright,
  • centerfromright
  • )
  • dancemany DoTogether (
  • Alice.PlaySound('i_love_you_song'),
  • Loop(dance, 6)
  • )
  • diebarney DoTogether (
  • Alice.PlaySound('03_start'),
  • purpledinosaur.destroy(duration2.5)
  • )
  • controls acontrolpanel(caption"Things Barney
    Does")
  • label controls.makelabel(caption"Click on a
    button and watch Barney go.")
  • button controls.makebutton(caption"Watch
    Barney Dance",
  • command dancemany)
  • button2 controls.makebutton(caption"Die Barney
    Die",
  • command diebarney)

32
Re-Running Barney
  • Hyperlink to Barney

33
Demos of Alice
  • Octopus
  • Freds Head
  • Palace
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