[etoys-dev] Forward direction (was Re: First draft of Etoys Reference Manual Glossary)
sthomas1 at gosargon.com
Wed Sep 26 10:40:51 EDT 2012
Created Issue in Tracker http://tracker.squeakland.org/browse/SQ-1117 cc'ing
education team for input.
Change Baloon Help as follows:
"heading" - Which direction the object will move. 0 is straight up.
"forward direction" - Rotation of the forward direction arrow. This will
not change when you turn the object.
"forward direction" - Rotation of the forward direction arrow relative to
the costumes original orientation.
On Wed, Sep 26, 2012 at 10:02 AM, Bert Freudenberg <bert at freudenbergs.de>wrote:
> On 2012-09-26, at 15:57, Steve Thomas <sthomas1 at gosargon.com> wrote:
> > On Wed, Sep 26, 2012 at 9:02 AM, Bert Freudenberg <bert at freudenbergs.de>
> >> On 2012-09-26, at 05:08, Steve Thomas <sthomas1 at gosargon.com> wrote:
> >>> changing forward direction should not IMNSHBOWO change heading.
> >> Wrong indeed ;) It's actually quite simple:
> > Not the first or last time. The only thing good about being wrong is
> when I find out I learn something new! Thanks.
> >> One way to think about it is that the forward direction describes the
> rotation as seen from the inside of the object, and heading is the rotation
> as seen from outside. You almost never have to use the numerical value of
> the forward direction because it only describes in which orientation the
> object was painted.
> > This is perhaps the best and simplest explanation yet.
> >> HTH,
> > It definetly helps.
> Great! Maybe you could come up with better help balloons for these tiles
> - Bert -
> etoys-dev mailing list
> etoys-dev at squeakland.org
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