# [Squeakland] The clock face - Panel discussion: Can the American Mind ...

Karl karl.ramberg at comhem.se
Mon Dec 3 04:19:23 PST 2007

```Etoys is about piecing together stuff.
Any Player have a heading so you can make scripts like the attached picture.

http://dev.laptop.org/~yoshiki/etoys/Clock.004.pr

Karl

=

Tony Forster wrote:
>>> My mental model for arithmetic is a clock face,
>
> The clock face is an interesting programming challenge for languages =

> like etoys, Scratch and Game Maker which provide good graphics =

> support. It provides a good context for problem solving and exploring =

> trigonometry. See a clock at =

> http://www.schoolgamemaker.rupert.id.au/morethan.htm programmed with =

> Game Maker.
>
> It is worth considering what kids would gain from such an exercise and =

> how the features of the various languages would affect the learning. =

> How do the languages compare for depth of learning and ease of use =

> (engagement)? It is only through considering these questions that =

> Squeak can be made as good as it can be.
>
> Anybody want to create a clock in etoys or Scratch for comparison? =

> Here is the Game Maker code
> draw_circle(200,200,130,true)
>
> x2=3D200+100*sin(2*pi*current_second/60)
>
> y2=3D200-100*cos(2*pi*current_second/60)
>
> draw_line(200,200,x2,y2)
>
> x2=3D200+100*sin(2*pi*current_minute/60)
>
> y2=3D200-100*cos(2*pi*current_minute/60)
>
> draw_line(200,200,x2,y2)
>
> x2=3D200+50*sin(2*pi*(current_hour+current_minute/60)/12)
>
> y2=3D200-50*cos(2*pi*(current_hour+current_minute/60)/12)
>
> draw_line(200,200,x2,y2)
>
> for(i=3D0; i<12; i+=3D1)
>
> {
>
> x1=3D200+110*sin(2*pi*(i)/12)
>
> y1=3D200-110*cos(2*pi*(i)/12)
>
> x2=3D200+125*sin(2*pi*(i)/12)
>
> y2=3D200-125*cos(2*pi*(i)/12)
>
> draw_line(x1,y1,x2,y2)
>
> }
>
>
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>

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