[etoys-dev] Forward direction (was Re: First draft of Etoys Reference Manual Glossary)

[Steve Thomas]

On Wed, Sep 26, 2012 at 9:02 AM, Bert Freudenberg <bert at freudenbergs.de>wrote:

> 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.
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