Counting up (easy) - then down (not so easy)

[chris]

I'm doing (trying to anyway) an old radar with a horizontal sweep.
I'm trying to generate a sequence of numbers, 0,8,16,24 ... 496,504. Then I want to count down to zero again.

This get me up and the sweep looks good (512x512 background bmp with an 8x512 sweep line)
<Value>(E:ABSOLUTE TIME,seconds) 32 * 63 %</Value>
but then resets to zero...

Anyone any ideas how to do this in a cyclic manner?

 

[Vitus]

I did this by adding another variable that holds the direction information. Also I would use a simple increment approach to it. Not sure if you can use <Value> to actually calculate a big chunk of code, I prefer <Code>.

<Parameter>
        <Code>
          (L:SWEEP LEFT,bool) 0 ==
          if{
            (L:RADAR POSITION,number) 1 + d (&gt;L:RADAR POSITION,number)
            63 &gt;
            if{
              1 (&gt;L:SWEEP RIGHT,bool)
            }
          }
          els{
            (L:RADAR POSITION,number) 1 - d (&gt;L:RADAR POSITION,number)
            1 &lt;
            if{
              0 (&gt;L:SWEEP RIGHT,bool)
            }
          }
          (L:RADAR POSITION,number)
        </Code>
      </Parameter>
</Value>

Not tested, but at least it should give you an idea.

Cheers,
Vitus

 

[chris]

I am suitably impressed
I couldn't get my head around the <Parameter> <Code> thing (probably because I've only started with eXtremely Masochistic Language a week or so ago) but I managed to fit it in like this:

<Gauge Name="EE Radar v0.1">
<Image Name="EE_radar_background.bmp"/>

<Element>
<Position X="0" Y="0"/>
<Image Name="EE_radar_scan.bmp"/>
<Shift>
<Value>(L:SWEEP LEFT,bool) 0 == if{
(L:RADAR POSITION,number) 2 + d (&gt;L:RADAR POSITION,number) 63 &gt; if{ 1 (&gt;L:SWEEP LEFT,bool) }
}
els{
(L:RADAR POSITION,number) 2 - d (&gt;L:RADAR POSITION,number) 1 &lt; if{ 0 (&gt;L:SWEEP LEFT,bool) }
} (L:RADAR POSITION,number)</Value>
<Nonlinearity>
<Item Value="0" X="0" Y="0"/>
<Item Value="63" X="504" Y="0"/>
</Nonlinearity>
</Shift>
</Element>

</Gauge>

Sorry about re-arranging your code layout - I just like to see where braces line up
Thanks for taking the time to help me.

Chris.

Edit: So much for for code layout - one day I'll have to find out how to put code in that box like you did...

 

[Willem]

Edit: So much for for code layout - one day I'll have to find out how to put code in that box like you did...

Well, that's the easy part!
In the top toolbar of your message screen, you can click on the # mark and insert your code between the two new CODE words that just appeared.

It is recommended to use this because it will prevent your message looking like a smiley contest because some code fragments are interpreted as smileys by the forum software.

grt
Willem

 

[n4gix]

There, nicely reformatted and in a

 box!

[CODE]
<Gauge Name="EE Radar v0.1">
  <Image Name="EE_radar_background.bmp"/>
  <Element>
    <Position X="0" Y="0"/>
    <Image Name="EE_radar_scan.bmp"/>
    <Shift>
      <Value>
        (L:SWEEP LEFT,bool) 0 == if{
        (L:RADAR POSITION,number) 2 + d (&gt;L:RADAR POSITION,number) 63 &gt; if{ 1 (&gt;L:SWEEP LEFT,bool) }
        }
        els{
        (L:RADAR POSITION,number) 2 - d (&gt;L:RADAR POSITION,number) 1 &lt; if{ 0 (&gt;L:SWEEP LEFT,bool) }
        } (L:RADAR POSITION,number)
      </Value>
      <Nonlinearity>
        <Item Value="0" X="0" Y="0"/>
        <Item Value="63" X="504" Y="0"/>
      </Nonlinearity>
    </Shift>
  </Element>
</Gauge>

 

[Vitus]

Hey Chris,

sorry, I didn't realize that you were talking about a 2D gauge - I thought you were looking for an animation code snippet
But it looks like you figured it out yourself how to change it, so good on you!

To insert a code section in the forums use the #-button in the editor.

Cheers,
Vitus

 

[chris]

OK guys - I've got it :D