alice-teacher Alice 3 Positioning of objects problem

[Don Slater]

I noticed that you were using different versions… 

"At one point we had noticed that the “pivot point” or “center point” of the shark was positioned so that it would not sink into the sand when added to a scene. However, over time, we found that having the pivot point way below the body caused problems with instructions such as "point at" and "orient to" ...  So the decision was made to relocate the center for the shark... and there were some other object as well... though at this time we do not recall which ones they were." (Wanda Dann)

What you are seeing is a result of two different software versions using sharks with different pivot points.

Let us know if you have any other questions.

Later,
Don Slater


On Mar 5, 2014, at 8:34 PM, Margaret Meijers <mmeijers at gmail.com> wrote:

> I teach Alice online to primary school students from many different schools, and I am starting to think there may be an issue with positioning of objects, but I'm not sure quite where the problem lies.   The issue has occurred a number of times with students from a couple of different schools.  At first I thought it was the kids positioning objects poorly, but I'm starting to get suspicious that it's related to different computers and versions of Alice perhaps?
> 
> What happens is that students (probably using a different version of Alice 3 to me) make an animation (they are very much beginners) and they send it to me for assessment.  
> But for a while I have been suspicious that they are not seeing what I am seeing as, frequently, objects seem to be positioned very poorly.  I have attached an example, both the alice program, and screen captures of what I see.  In the screen capture, the small thumbnail is from the Recent category in File >Open and it looks ok, but when I open the animation, the shark is sitting below the sand.  Other objects (eg the fish) that appear later in the animation are in the correct place (or where I assume the student placed it).
> I have opened the animation on two different computers (one running V3.1.81, the other V3.1.77), and I see the same thing on both computers.  
> 
> So my questions:  Is there something obvious that I am missing?  Are the students doing something?  Is it possible that it's a versioning issue? 
> 
> Thanks
> Margaret
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