Alice Community  

Go Back   Alice Community > Alice 2 > Works-In-Progress

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
toySoldier saluting
Old
Skip
Guest
 
Status:
Posts: n/a
Default toySoldier saluting - 10-15-2007, 11:36 PM

Hi,

I'm just starting out in Alice, and am working my way through "Learning to Program with Alice." One of the exercises at the end of Chapter One is to take the stock toySoldier model and move his right arm so he appears to be saluting. I have worked out that it involves turning the arm 1/4 revolution, turning the forearm 0.3 revolution and rolling the forearm 0.08 revolution.

To automate this pose, I created a method which did the three actions together, waited a second, and then undid the actions in the reverse order.

My question is this: why, when doing the actions together, do I need to add additional roll to the forearm? To make the hand wind up in the same spot, I needed to add about 100% more roll (0.15-0.16). Is this a peculiarity of the way Alice works, or is there a way to calculate how much thing need to be fudged in advance?

The exercise is a great one, and I learned how to make a new, smarter model, how to include a picture of the model, taken in Alice, and about the import function.

Thanks!
--skip

Last edited by Skip; 10-16-2007 at 07:28 AM. Reason: slight refinement of roll numbers
   
Reply With Quote
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



Copyright ©2020, Carnegie Mellon University
Alice 2.x 1999-2012, Alice 3.x 2008-2012, Carnegie Mellon University. All rights reserved.