for (int x = -Grid.INTERPOLATION_RADIUS;
x < expectedGrid.getNumCellsX() + Grid.INTERPOLATION_RADIUS; ++x) {
for (int y = -Grid.INTERPOLATION_RADIUS;
y < expectedGrid.getNumCellsY() + Grid.INTERPOLATION_RADIUS; ++y) {
Cell expectedCell = expectedGrid.getCell(x,y);
Cell actualCell = actualGrid.getCell(x,y);
if (!compareCells(expectedCell, actualCell, tolerance)) {
++differences;
System.out.println(" -> differences in cell: " + x + "," + y);
}
}