[Stk] question about Mesh2D

[Stefan T. Tomic]

Anyone who is familiar with the Mesh2D instrument could probably answer this really quickly.

I'm looking at the tick0 and tick1 functions and see that at the unit delay line arrays vxp1,vxm1, etc. only range from (0..NX-1) and (0..NY-1).  However, as I understand the model, it seems like they should range (0..NX) and (0..NY) since there should be one more delay in each dimension than there are junctions in that dimension.  So if the junctions run from (0..NX-1) and (0..NY-1), the delay lines should run from (0..NX) and (0..NY).  Is the waveguide reflection happening one sample early?  Any advice is appreciated.

Thanks,

Stefan Tomic


Here's the code I'm looking at:

MY_FLOAT Mesh2D :: tick0()

.....
.....

  for (y=0; y<NY-1; y++) {
    vxp1[0][y] = filterY[y]->tick(vxm[0][y]);
    vxm1[NX-1][y] = vxp[NX-1][y];
  }
  for (x=0; x<NX-1; x++) {
    vyp1[x][0] = filterX[x]->tick(vym[x][0]);
    vym1[x][NY-1] = vyp[x][NY-1];
  }

....
....
}