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Here a bsh script from your pseudo code.

It need some adjustments with the definition of origins at each zoom level....

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static import java.lang.Math.*;

name = "Michelin2012";
tileType = "png";
tileSize = 256;
minZoom = 2;
maxZoom = 16;
tileUpdate = TileUpdate.IfModifiedSince;
backgroundColor = "#ffffff";
ignoreError = "True";

String urlstring(int zm,int r,int c) {
int[] tile;
int new_zoom=zm-2;
String zs;
switch (new_zoom)    {
case 0  : zs="wot_0180m_r02"   ; break;
case 1  : zs="woc_0090m_r02"   ; break;
case 2  : zs="woc_0045m_r02"   ; break;
case 3  : zs="woc_0024m_r02"   ; break;
case 4  : zs="woc_0012m_r02"   ; break;
case 5  : zs="woc_6000k_r02"   ; break;
case 6  : zs="woc_3000k_r02"   ; break;
case 7  : zs="woc_1500k_r02"   ; break;
case 8  : zs="eur_c_1000k_r05" ; break;
case 9  : zs="fra_c_0275k_r061"; break;
case 10 : zs="fra_c_0185k_r061"; break;
case 11 : zs="eur_c_0060k_r08" ; break;
case 12 : zs="eur_c_0024k_r08" ; break;
case 13 : zs="eur_c_0012k_r08" ; break;
case 14 : zs="eur_c_0006k_r08" ; break;
}
   tile = rc2tile(r,c);
   int tileA = tile[0];
   int tileB = tile[1];
   String tilestring = tiles2string(String.valueOf(tileA),String.valueOf(tileB));
   String mapb64string = Tools.encodeBase64(zs.getBytes( "UTF-8" ));
   String tileb64string = Tools.encodeBase64(tilestring.getBytes( "UTF-8" ));
   return mapb64string + ";"+tileb64string;
}

int[] rc2tile(int r,int c) {
int[] tile2;
int A;
int B;
//javax.swing.JOptionPane.showMessageDialog(null,r+" "+c);
   if ((r==1)&&(c==1)) {
      A = 0;
      B = 0;
   }
   else {
Double r0=(Double)r;
Double c0=(Double)c;
      int r2 = round(r0/2);
      int c2 = round(c0/2);
      tile2 = rc2tile(r2,c2);
      int tile2A = tile2[0];
      int tile2B = tile2[1];
      A = tile2B * 2 + ((r-1) % 2);
      B = tile2A * 2 + ((c-1) % 2);
            // note that the A/B switch above is intentional
   }
   return new int[] {A,B};
}

String tiles2string(String a,String b) {
   String ps="";
   String qs="";
   int p=a.length();
   int q=b.length();
   for(i=0;i<(10-p);p++)
ps=ps+"0";
   for(i=0;i<(10-q);q++)
qs=qs+"0";
   return ps + a + qs + b;
}

String getTileUrl( int zoom, int x, int y ) {
return "http://m10.viamichelin.com/mapsgene/dm/mapdirect;" + urlstring(zoom,x+1,y+1);
}
Try this with MOBAC and MapEvaluator for tweeking...

Hi. Your reverse-engenering is clear. I understand the way the Michelin tiles are created....
But I am unable to write a good algorithm to get the right michelin tile from x, y and zoom level as input.
If you have time to develop it, I would be happy to read your pseudo code for transformation and so I could adapt it as an bsh addon for MOBAC.
Get in touch...

[We could now make a simple algorithm that converts back and forth between standard reference systems (x,y or QuadKey) and the "michelin" system.]

We could now make a simple algorithm that converts back and forth between standard reference systems (x,y or QuadKey) and the "michelin" system.

Hi 2012, good job!

But I can't get the good algorithm to transform x,y and zoom level to the michelin system.

Do you have a script for mobac?

Thx