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By: Brian Cannella Andrew McCaffrey Thomas McConlogue

Alice/Python. By: Brian Cannella Andrew McCaffrey Thomas McConlogue. Alice In Python Land. Table of Contents. Introduction to Alice Creating Simple Worlds Scripting (Python) Demos. What Is Alice?. Alice is a 3D Interactive Graphics Programming Environment for Windows 95/98/NT

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By: Brian Cannella Andrew McCaffrey Thomas McConlogue

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  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, Microsoft’s Direct 3D Library, and Microsoft’s 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. You don’t 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 can’t 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 Misc Points

  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. 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), purpledinosaur.head.lefteye.turn(right,.1) ) Code to Barney Program

  31. 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(duration=2.5) ) 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) Code To Barney Program

  32. Re-Running Barney Hyperlink to Barney

  33. Demos of Alice • Octopus • Fred’s Head • Palace

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