From: Ruby Student <ruby.student@...>
Date: 2013-06-07T04:10:27+09:00
Subject: Re: My car is "falling" off the screen green shoes

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This also works very nicely!

Thank you very much for taking the time to answer my post.


On Thu, Jun 6, 2013 at 2:51 PM, Regis d'Aubarede <lists@ruby-forum.com>wrote:

> and then, a little physics
>
>
> ==========================================================
> require 'green_shoes'
>
> def inside(a,m,b) m<a ? a : (m> b ? b : m) end
> def inside?(a,m,b)  inside(a,m,b)==m end
>
> Shoes.app :width => 600,:height=> 100 do
>   info= para ""
>   @carim = image "car.png" #!!!!!
>
>   speed=10
>   acceleration=0.0
>   pos=300
>
>   h={"Left" => -0.3 , "Right" => +0.4 }
>
>   keypress do |k|
>     acceleration = inside(-10, (acceleration+(h[k] || 0)) ,+10)
>   end
>
>   animate do
>     speed+=acceleration
>     speed*=0.97
>     acceleration=0
>     speed *= -1 unless inside?(0,pos+speed,width-@carim.width)
>     pos=pos+speed
>     speed=inside(-10,speed,+10)
>
>     @carim.move pos, 100-@carim.height
>     info.replace "  Speed=%5.2f " %[speed]
>   end
> end
> ==========================================================
>
> --
> Posted via http://www.ruby-forum.com/.
>
>


-- 
Ruby Student

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<div dir=3D"ltr"><div>This also works very nicely!<br><br></div>Thank you v=
ery much for taking the time to answer my post.<br></div><div class=3D"gmai=
l_extra"><br><br><div class=3D"gmail_quote">On Thu, Jun 6, 2013 at 2:51 PM,=
 Regis d&#39;Aubarede <span dir=3D"ltr">&lt;<a href=3D"mailto:lists@ruby-fo=
rum.com" target=3D"_blank">lists@ruby-forum.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">and then, a little physics<br>
<br>
<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D<br>
require &#39;green_shoes&#39;<br>
<br>
def inside(a,m,b) m&lt;a ? a : (m&gt; b ? b : m) end<br>
def inside?(a,m,b) =A0inside(a,m,b)=3D=3Dm end<br>
<br>
Shoes.app :width =3D&gt; 600,:height=3D&gt; 100 do<br>
=A0 info=3D para &quot;&quot;<br>
=A0 @carim =3D image &quot;car.png&quot; #!!!!!<br>
<br>
=A0 speed=3D10<br>
=A0 acceleration=3D0.0<br>
=A0 pos=3D300<br>
<br>
=A0 h=3D{&quot;Left&quot; =3D&gt; -0.3 , &quot;Right&quot; =3D&gt; +0.4 }<b=
r>
<br>
=A0 keypress do |k|<br>
=A0 =A0 acceleration =3D inside(-10, (acceleration+(h[k] || 0)) ,+10)<br>
=A0 end<br>
<br>
=A0 animate do<br>
=A0 =A0 speed+=3Dacceleration<br>
=A0 =A0 speed*=3D0.97<br>
=A0 =A0 acceleration=3D0<br>
=A0 =A0 speed *=3D -1 unless inside?(0,pos+speed,width-@carim.width)<br>
=A0 =A0 pos=3Dpos+speed<br>
=A0 =A0 speed=3Dinside(-10,speed,+10)<br>
<br>
=A0 =A0 @carim.move pos, 100-@carim.height<br>
=A0 =A0 info.replace &quot; =A0Speed=3D%5.2f &quot; %[speed]<br>
=A0 end<br>
end<br>
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
--<br>
Posted via <a href=3D"http://www.ruby-forum.com/" target=3D"_blank">http://=
www.ruby-forum.com/</a>.<br>
<br>
</font></span></blockquote></div><br><br clear=3D"all"><br>-- <br>Ruby Stud=
ent
</div>

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