[etoys-dev] Re: [JIRA] Commented: (SQ-682) 'forward by' when snap to grid is true move one gridspace forward.

Steve Thomas sthomas1 at gosargon.com
Mon Mar 22 13:37:44 EDT 2010

There are other ways to accomplish the same tasks (ie: move "forward" one
grid space et al) without being able to specify movement in "grid units"
(ie: move forward grid size).

What exactly is the problem we are trying to solve?

Randy did a beautiful example of moving across a grid in his Lesson
how moving across a grid can be used to measure area. In fact I believe he
did it without using gridding.

Now one thing I have been struggling with is how to measure perimeter. I saw
Randy do it using Polygons.

But not sure how to do it when placing Squares in a Playfield to create a
Any suggestions or a script would be appreciated.


On Mon, Mar 22, 2010 at 12:28 PM, Rita Freudenberg <
rita at isg.cs.uni-magdeburg.de> wrote:

> 'forward by' when snap to grid is true move one gridspace forward.
> ------------------------------------------------------------------
>              Key: SQ-682
>              URL: http://tracker.squeakland.org/browse/SQ-682
>          Project: squeakland
>       Issue Type: Feature
>       Components: etoys
>         Reporter: Karl Ramberg
> When snap to grid is turned on it would be nice if forward by moved the
> player one grid space forward. Like wise for all the height, width turn etc
> that they reflected the preference griding and showed the grid values
> instead of the pixel values.
>  Bert Freudenberg commented on SQ-682:
>>>>> -------------------------------------
>>>>> I don't think this would be a good idea. The gridding is for manual
>>>>> placement of objects.
>>>>> But feel free to discuss on the squeakland list (since this is changing
>>>>> behavior, it's not just for developers).
>>>> I agree it's a big change and maybe you are right.
>>>> Maybe it' just complicates stuff unnecessary.
>>>> But we kind of do this on the pixel grid already by moving one pixel
>>>> forward ;-)
>>>> Another related change is defining movement to for example centimeters
>>>> instead of pixels.
>>>> But it is a fundamental change and need more discussion.
>>> Randy, what do you think, would you like to have that for your perimeter
> lessons? Maybe to write a script to calculate the perimeter?
> Rita
> _______________________________________________
> etoys-dev mailing list
> etoys-dev at squeakland.org
> http://lists.squeakland.org/mailman/listinfo/etoys-dev
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.squeakland.org/pipermail/etoys-dev/attachments/20100322/d4b90e6b/attachment.html

More information about the etoys-dev mailing list